./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-node-symm.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-symm.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 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f --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 01:42:09,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:42:09,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:42:09,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:42:09,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:42:09,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:42:09,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:42:09,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:42:09,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:42:09,944 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:42:09,945 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:42:09,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:42:09,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:42:09,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:42:09,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:42:09,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:42:09,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:42:09,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:42:09,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:42:09,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:42:09,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:42:09,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:42:09,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:42:09,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:42:09,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:42:09,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:42:09,977 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:42:09,978 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:42:09,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:42:09,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:42:09,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:42:09,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:42:09,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:42:09,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:42:09,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:42:09,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:42:09,990 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:42:09,990 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:42:09,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:42:09,991 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:42:09,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:42:09,993 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 01:42:10,027 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:42:10,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:42:10,029 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:42:10,029 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:42:10,030 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:42:10,030 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:42:10,031 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:42:10,031 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:42:10,031 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:42:10,031 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:42:10,032 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:42:10,032 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:42:10,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:42:10,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:42:10,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:42:10,033 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:42:10,033 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:42:10,034 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:42:10,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:42:10,034 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:42:10,034 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:42:10,034 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:42:10,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:42:10,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:42:10,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:42:10,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:42:10,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:42:10,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:42:10,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 01:42:10,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 01:42:10,036 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:42:10,036 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:42:10,037 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:42:10,037 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:42:10,037 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:42:10,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:42:10,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:42:10,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:42:10,352 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:42:10,353 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:42:10,354 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-node-symm.wvr.c [2023-09-01 01:42:11,497 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:42:11,728 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:42:11,729 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-symm.wvr.c [2023-09-01 01:42:11,739 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a63e2127c/cf36dbb4ba3f465cabff23262a202d3a/FLAG28824cb13 [2023-09-01 01:42:11,749 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a63e2127c/cf36dbb4ba3f465cabff23262a202d3a [2023-09-01 01:42:11,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:42:11,753 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:42:11,754 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:42:11,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:42:11,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:42:11,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:42:11" (1/1) ... [2023-09-01 01:42:11,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74092f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:42:11, skipping insertion in model container [2023-09-01 01:42:11,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:42:11" (1/1) ... [2023-09-01 01:42:11,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:42:11,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:42:11,992 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-symm.wvr.c[3305,3318] [2023-09-01 01:42:12,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:42:12,029 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 01:42:12,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6dc8aa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:42:12, skipping insertion in model container [2023-09-01 01:42:12,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:42:12,031 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 01:42:12,033 INFO L158 Benchmark]: Toolchain (without parser) took 278.97ms. Allocated memory is still 73.4MB. Free memory was 50.8MB in the beginning and 40.6MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 01:42:12,033 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 54.5MB. Free memory is still 31.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 01:42:12,034 INFO L158 Benchmark]: CACSL2BoogieTranslator took 277.10ms. Allocated memory is still 73.4MB. Free memory was 50.6MB in the beginning and 40.6MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 01:42:12,035 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 54.5MB. Free memory is still 31.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 277.10ms. Allocated memory is still 73.4MB. Free memory was 50.6MB in the beginning and 40.6MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 102]: 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-symm.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 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f --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 01:42:13,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:42:13,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:42:13,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:42:13,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:42:13,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:42:13,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:42:13,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:42:13,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:42:13,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:42:13,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:42:13,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:42:13,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:42:13,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:42:13,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:42:13,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:42:13,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:42:13,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:42:13,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:42:13,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:42:13,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:42:13,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:42:13,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:42:13,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:42:13,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:42:13,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:42:13,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:42:13,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:42:13,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:42:13,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:42:13,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:42:13,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:42:13,831 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:42:13,832 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:42:13,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:42:13,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:42:13,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:42:13,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:42:13,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:42:13,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:42:13,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:42:13,836 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 01:42:13,870 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:42:13,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:42:13,871 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:42:13,871 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:42:13,872 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:42:13,872 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:42:13,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:42:13,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:42:13,873 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:42:13,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:42:13,874 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:42:13,874 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:42:13,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:42:13,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:42:13,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:42:13,875 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:42:13,875 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:42:13,875 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:42:13,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:42:13,876 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:42:13,876 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 01:42:13,876 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 01:42:13,876 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:42:13,876 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:42:13,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:42:13,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:42:13,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:42:13,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:42:13,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:42:13,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:42:13,878 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 01:42:13,878 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 01:42:13,878 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:42:13,878 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:42:13,879 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:42:13,879 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 01:42:13,879 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:42:13,879 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:42:14,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:42:14,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:42:14,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:42:14,167 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:42:14,167 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:42:14,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-node-symm.wvr.c [2023-09-01 01:42:15,278 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:42:15,472 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:42:15,473 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-symm.wvr.c [2023-09-01 01:42:15,478 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7170ec19/8de5710c4f5943609745b0ed71dcb3ba/FLAG19d89e7b2 [2023-09-01 01:42:15,495 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7170ec19/8de5710c4f5943609745b0ed71dcb3ba [2023-09-01 01:42:15,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:42:15,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:42:15,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:42:15,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:42:15,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:42:15,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:42:15" (1/1) ... [2023-09-01 01:42:15,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2520a066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:42:15, skipping insertion in model container [2023-09-01 01:42:15,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:42:15" (1/1) ... [2023-09-01 01:42:15,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:42:15,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:42:15,722 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-symm.wvr.c[3305,3318] [2023-09-01 01:42:15,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:42:15,762 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 01:42:15,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:42:15,795 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-symm.wvr.c[3305,3318] [2023-09-01 01:42:15,809 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:42:15,819 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 01:42:15,852 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-symm.wvr.c[3305,3318] [2023-09-01 01:42:15,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:42:15,878 INFO L208 MainTranslator]: Completed translation [2023-09-01 01:42:15,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:42:15 WrapperNode [2023-09-01 01:42:15,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:42:15,881 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 01:42:15,881 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 01:42:15,881 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 01:42:15,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:42:15" (1/1) ... [2023-09-01 01:42:15,935 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:42:15" (1/1) ... [2023-09-01 01:42:15,981 INFO L138 Inliner]: procedures = 28, calls = 50, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 282 [2023-09-01 01:42:15,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 01:42:15,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 01:42:15,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 01:42:15,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 01:42:15,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:42:15" (1/1) ... [2023-09-01 01:42:15,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:42:15" (1/1) ... [2023-09-01 01:42:15,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:42:15" (1/1) ... [2023-09-01 01:42:15,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:42:15" (1/1) ... [2023-09-01 01:42:16,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:42:15" (1/1) ... [2023-09-01 01:42:16,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:42:15" (1/1) ... [2023-09-01 01:42:16,035 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:42:15" (1/1) ... [2023-09-01 01:42:16,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:42:15" (1/1) ... [2023-09-01 01:42:16,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 01:42:16,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 01:42:16,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 01:42:16,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 01:42:16,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:42:15" (1/1) ... [2023-09-01 01:42:16,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:42:16,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:42:16,072 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 01:42:16,074 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 01:42:16,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 01:42:16,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2023-09-01 01:42:16,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 01:42:16,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 01:42:16,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 01:42:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 01:42:16,103 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 01:42:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 01:42:16,103 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 01:42:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 01:42:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 01:42:16,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 01:42:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2023-09-01 01:42:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 01:42:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 01:42:16,106 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 01:42:16,284 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 01:42:16,286 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 01:42:16,976 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 01:42:16,984 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 01:42:16,985 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 01:42:16,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:42:16 BoogieIcfgContainer [2023-09-01 01:42:16,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 01:42:16,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 01:42:16,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 01:42:16,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 01:42:16,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:42:15" (1/3) ... [2023-09-01 01:42:16,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bcda967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:42:16, skipping insertion in model container [2023-09-01 01:42:16,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:42:15" (2/3) ... [2023-09-01 01:42:16,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bcda967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:42:16, skipping insertion in model container [2023-09-01 01:42:16,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:42:16" (3/3) ... [2023-09-01 01:42:16,994 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2023-09-01 01:42:17,008 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 01:42:17,009 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-09-01 01:42:17,009 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 01:42:17,145 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 01:42:17,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 354 places, 375 transitions, 766 flow [2023-09-01 01:42:17,331 INFO L130 PetriNetUnfolder]: 28/373 cut-off events. [2023-09-01 01:42:17,332 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 01:42:17,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 373 events. 28/373 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 555 event pairs, 0 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 284. Up to 2 conditions per place. [2023-09-01 01:42:17,340 INFO L82 GeneralOperation]: Start removeDead. Operand has 354 places, 375 transitions, 766 flow [2023-09-01 01:42:17,349 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 348 places, 369 transitions, 750 flow [2023-09-01 01:42:17,353 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 01:42:17,367 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 348 places, 369 transitions, 750 flow [2023-09-01 01:42:17,373 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 348 places, 369 transitions, 750 flow [2023-09-01 01:42:17,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 348 places, 369 transitions, 750 flow [2023-09-01 01:42:17,435 INFO L130 PetriNetUnfolder]: 28/369 cut-off events. [2023-09-01 01:42:17,435 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 01:42:17,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 369 events. 28/369 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 546 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 284. Up to 2 conditions per place. [2023-09-01 01:42:17,444 INFO L119 LiptonReduction]: Number of co-enabled transitions 9676 [2023-09-01 01:42:56,021 INFO L134 LiptonReduction]: Checked pairs total: 14522 [2023-09-01 01:42:56,022 INFO L136 LiptonReduction]: Total number of compositions: 447 [2023-09-01 01:42:56,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 01:42:56,048 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;@740a48a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 01:42:56,049 INFO L358 AbstractCegarLoop]: Starting to check reachability of 68 error locations. [2023-09-01 01:42:56,051 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 01:42:56,051 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:42:56,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:42:56,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:42:56,053 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:42:56,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:42:56,057 INFO L85 PathProgramCache]: Analyzing trace with hash 46781, now seen corresponding path program 1 times [2023-09-01 01:42:56,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:42:56,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735414817] [2023-09-01 01:42:56,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:42:56,068 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 01:42:56,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:42:56,073 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 01:42:56,100 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 01:42:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:42:56,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:42:56,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:42:56,342 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:42:56,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 01:42:56,379 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 01:42:56,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:42:56,380 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:42:56,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735414817] [2023-09-01 01:42:56,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1735414817] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:42:56,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:42:56,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:42:56,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779640154] [2023-09-01 01:42:56,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:42:56,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:42:56,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:42:56,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:42:56,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:42:56,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 822 [2023-09-01 01:42:56,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 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 01:42:56,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:42:56,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 822 [2023-09-01 01:42:56,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:42:57,437 INFO L130 PetriNetUnfolder]: 1023/1704 cut-off events. [2023-09-01 01:42:57,438 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-09-01 01:42:57,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3441 conditions, 1704 events. 1023/1704 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 8707 event pairs, 945 based on Foata normal form. 0/492 useless extension candidates. Maximal degree in co-relation 3250. Up to 1684 conditions per place. [2023-09-01 01:42:57,447 INFO L137 encePairwiseOnDemand]: 810/822 looper letters, 59 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-09-01 01:42:57,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 68 transitions, 276 flow [2023-09-01 01:42:57,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:42:57,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:42:57,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1085 transitions. [2023-09-01 01:42:57,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4399837793998378 [2023-09-01 01:42:57,463 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1085 transitions. [2023-09-01 01:42:57,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1085 transitions. [2023-09-01 01:42:57,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:42:57,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1085 transitions. [2023-09-01 01:42:57,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 361.6666666666667) internal successors, (1085), 3 states have internal predecessors, (1085), 0 states have call successors, (0), 0 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 01:42:57,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:57,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:57,484 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 146 flow. Second operand 3 states and 1085 transitions. [2023-09-01 01:42:57,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 68 transitions, 276 flow [2023-09-01 01:42:57,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 68 transitions, 268 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 01:42:57,491 INFO L231 Difference]: Finished difference. Result has 63 places, 66 transitions, 168 flow [2023-09-01 01:42:57,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=63, PETRI_TRANSITIONS=66} [2023-09-01 01:42:57,496 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -5 predicate places. [2023-09-01 01:42:57,496 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 66 transitions, 168 flow [2023-09-01 01:42:57,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 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 01:42:57,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:42:57,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:42:57,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 01:42:57,706 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 01:42:57,707 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:42:57,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:42:57,707 INFO L85 PathProgramCache]: Analyzing trace with hash 46782, now seen corresponding path program 1 times [2023-09-01 01:42:57,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:42:57,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869144887] [2023-09-01 01:42:57,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:42:57,708 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 01:42:57,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:42:57,710 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 01:42:57,713 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 01:42:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:42:57,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 01:42:57,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:42:57,811 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:42:57,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:42:57,825 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 01:42:57,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:42:57,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:42:57,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869144887] [2023-09-01 01:42:57,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869144887] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:42:57,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:42:57,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:42:57,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775872448] [2023-09-01 01:42:57,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:42:57,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:42:57,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:42:57,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:42:57,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:42:58,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 822 [2023-09-01 01:42:58,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 340.6666666666667) internal successors, (1022), 3 states have internal predecessors, (1022), 0 states have call successors, (0), 0 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 01:42:58,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:42:58,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 822 [2023-09-01 01:42:58,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:42:58,619 INFO L130 PetriNetUnfolder]: 1023/1700 cut-off events. [2023-09-01 01:42:58,620 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:42:58,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3422 conditions, 1700 events. 1023/1700 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 8678 event pairs, 945 based on Foata normal form. 4/498 useless extension candidates. Maximal degree in co-relation 3380. Up to 1684 conditions per place. [2023-09-01 01:42:58,628 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 59 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-09-01 01:42:58,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 64 transitions, 284 flow [2023-09-01 01:42:58,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:42:58,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:42:58,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1078 transitions. [2023-09-01 01:42:58,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43714517437145173 [2023-09-01 01:42:58,632 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1078 transitions. [2023-09-01 01:42:58,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1078 transitions. [2023-09-01 01:42:58,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:42:58,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1078 transitions. [2023-09-01 01:42:58,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.3333333333333) internal successors, (1078), 3 states have internal predecessors, (1078), 0 states have call successors, (0), 0 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 01:42:58,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:58,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:58,642 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 168 flow. Second operand 3 states and 1078 transitions. [2023-09-01 01:42:58,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 64 transitions, 284 flow [2023-09-01 01:42:58,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 64 transitions, 274 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:42:58,645 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 156 flow [2023-09-01 01:42:58,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=61, PETRI_TRANSITIONS=64} [2023-09-01 01:42:58,646 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -7 predicate places. [2023-09-01 01:42:58,646 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 156 flow [2023-09-01 01:42:58,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 340.6666666666667) internal successors, (1022), 3 states have internal predecessors, (1022), 0 states have call successors, (0), 0 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 01:42:58,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:42:58,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:42:58,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 01:42:58,856 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 01:42:58,856 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:42:58,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:42:58,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1456754, now seen corresponding path program 1 times [2023-09-01 01:42:58,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:42:58,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078701349] [2023-09-01 01:42:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:42:58,857 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 01:42:58,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:42:58,859 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 01:42:58,861 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 01:42:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:42:58,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:42:58,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:42:58,994 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:42:58,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 01:42:59,053 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 01:42:59,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:42:59,252 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 01:42:59,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:42:59,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078701349] [2023-09-01 01:42:59,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078701349] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:42:59,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:42:59,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 01:42:59,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220464426] [2023-09-01 01:42:59,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:42:59,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:42:59,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:42:59,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:42:59,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:43:00,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 822 [2023-09-01 01:43:00,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 0 states have call successors, (0), 0 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 01:43:00,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:43:00,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 822 [2023-09-01 01:43:00,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:43:02,105 INFO L130 PetriNetUnfolder]: 1029/1712 cut-off events. [2023-09-01 01:43:02,106 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:43:02,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3454 conditions, 1712 events. 1029/1712 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 8948 event pairs, 945 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 3446. Up to 1677 conditions per place. [2023-09-01 01:43:02,114 INFO L137 encePairwiseOnDemand]: 814/822 looper letters, 54 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2023-09-01 01:43:02,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 76 transitions, 348 flow [2023-09-01 01:43:02,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:43:02,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:43:02,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2046 transitions. [2023-09-01 01:43:02,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148418491484185 [2023-09-01 01:43:02,121 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2046 transitions. [2023-09-01 01:43:02,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2046 transitions. [2023-09-01 01:43:02,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:43:02,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2046 transitions. [2023-09-01 01:43:02,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 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 01:43:02,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 822.0) internal successors, (5754), 7 states have internal predecessors, (5754), 0 states have call successors, (0), 0 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 01:43:02,137 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 822.0) internal successors, (5754), 7 states have internal predecessors, (5754), 0 states have call successors, (0), 0 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 01:43:02,138 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 156 flow. Second operand 6 states and 2046 transitions. [2023-09-01 01:43:02,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 76 transitions, 348 flow [2023-09-01 01:43:02,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 76 transitions, 347 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:43:02,140 INFO L231 Difference]: Finished difference. Result has 68 places, 76 transitions, 279 flow [2023-09-01 01:43:02,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=68, PETRI_TRANSITIONS=76} [2023-09-01 01:43:02,141 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2023-09-01 01:43:02,141 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 76 transitions, 279 flow [2023-09-01 01:43:02,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 0 states have call successors, (0), 0 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 01:43:02,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:43:02,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 01:43:02,154 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 01:43:02,351 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 01:43:02,352 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:43:02,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:43:02,352 INFO L85 PathProgramCache]: Analyzing trace with hash 45228781, now seen corresponding path program 1 times [2023-09-01 01:43:02,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:43:02,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435894552] [2023-09-01 01:43:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:43:02,353 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 01:43:02,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:43:02,354 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 01:43:02,356 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 01:43:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:43:02,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:43:02,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:43:02,484 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 8 treesize of output 7 [2023-09-01 01:43:02,513 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 01:43:02,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:43:02,513 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:43:02,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435894552] [2023-09-01 01:43:02,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435894552] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:43:02,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:43:02,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:43:02,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323131696] [2023-09-01 01:43:02,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:43:02,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:43:02,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:43:02,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:43:02,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:43:03,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 822 [2023-09-01 01:43:03,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 76 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 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 01:43:03,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:43:03,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 822 [2023-09-01 01:43:03,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:43:03,653 INFO L130 PetriNetUnfolder]: 1030/1715 cut-off events. [2023-09-01 01:43:03,653 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 01:43:03,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3504 conditions, 1715 events. 1030/1715 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 9055 event pairs, 945 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 3492. Up to 1693 conditions per place. [2023-09-01 01:43:03,662 INFO L137 encePairwiseOnDemand]: 817/822 looper letters, 67 selfloop transitions, 8 changer transitions 0/79 dead transitions. [2023-09-01 01:43:03,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 79 transitions, 438 flow [2023-09-01 01:43:03,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:43:03,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:43:03,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1404 transitions. [2023-09-01 01:43:03,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42700729927007297 [2023-09-01 01:43:03,667 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1404 transitions. [2023-09-01 01:43:03,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1404 transitions. [2023-09-01 01:43:03,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:43:03,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1404 transitions. [2023-09-01 01:43:03,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 01:43:03,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 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 01:43:03,678 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 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 01:43:03,678 INFO L175 Difference]: Start difference. First operand has 68 places, 76 transitions, 279 flow. Second operand 4 states and 1404 transitions. [2023-09-01 01:43:03,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 79 transitions, 438 flow [2023-09-01 01:43:03,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 79 transitions, 412 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 01:43:03,685 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 289 flow [2023-09-01 01:43:03,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=289, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2023-09-01 01:43:03,687 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-09-01 01:43:03,687 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 289 flow [2023-09-01 01:43:03,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 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 01:43:03,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:43:03,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 01:43:03,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 01:43:03,897 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 01:43:03,897 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:43:03,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:43:03,898 INFO L85 PathProgramCache]: Analyzing trace with hash 45228782, now seen corresponding path program 1 times [2023-09-01 01:43:03,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:43:03,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525676111] [2023-09-01 01:43:03,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:43:03,898 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 01:43:03,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:43:03,900 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 01:43:03,900 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 01:43:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:43:03,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 01:43:03,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:43:03,977 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 01:43:03,981 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 01:43:03,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:43:03,981 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:43:03,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525676111] [2023-09-01 01:43:03,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1525676111] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:43:03,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:43:03,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:43:03,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269879815] [2023-09-01 01:43:03,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:43:03,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:43:03,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:43:03,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:43:03,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:43:04,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 822 [2023-09-01 01:43:04,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 341.3333333333333) internal successors, (1024), 3 states have internal predecessors, (1024), 0 states have call successors, (0), 0 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 01:43:04,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:43:04,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 822 [2023-09-01 01:43:04,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:43:04,555 INFO L130 PetriNetUnfolder]: 1030/1712 cut-off events. [2023-09-01 01:43:04,555 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 01:43:04,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3499 conditions, 1712 events. 1030/1712 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 9033 event pairs, 945 based on Foata normal form. 2/514 useless extension candidates. Maximal degree in co-relation 3485. Up to 1678 conditions per place. [2023-09-01 01:43:04,564 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 67 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2023-09-01 01:43:04,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 76 transitions, 429 flow [2023-09-01 01:43:04,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:43:04,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:43:04,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1076 transitions. [2023-09-01 01:43:04,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43633414436334145 [2023-09-01 01:43:04,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1076 transitions. [2023-09-01 01:43:04,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1076 transitions. [2023-09-01 01:43:04,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:43:04,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1076 transitions. [2023-09-01 01:43:04,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 358.6666666666667) internal successors, (1076), 3 states have internal predecessors, (1076), 0 states have call successors, (0), 0 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 01:43:04,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:04,584 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:04,584 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 289 flow. Second operand 3 states and 1076 transitions. [2023-09-01 01:43:04,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 76 transitions, 429 flow [2023-09-01 01:43:04,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 76 transitions, 418 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 01:43:04,587 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 284 flow [2023-09-01 01:43:04,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2023-09-01 01:43:04,588 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2023-09-01 01:43:04,588 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 284 flow [2023-09-01 01:43:04,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 341.3333333333333) internal successors, (1024), 3 states have internal predecessors, (1024), 0 states have call successors, (0), 0 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 01:43:04,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:43:04,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 01:43:04,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 01:43:04,797 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 01:43:04,797 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:43:04,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:43:04,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1402097510, now seen corresponding path program 1 times [2023-09-01 01:43:04,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:43:04,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954684164] [2023-09-01 01:43:04,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:43:04,798 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 01:43:04,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:43:04,799 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 01:43:04,800 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 01:43:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:43:04,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 01:43:04,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:43:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:43:04,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:43:04,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:43:04,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954684164] [2023-09-01 01:43:04,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954684164] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:43:04,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:43:04,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:43:04,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553475502] [2023-09-01 01:43:04,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:43:04,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:43:04,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:43:04,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:43:04,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:43:05,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 822 [2023-09-01 01:43:05,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 341.6666666666667) internal successors, (1025), 3 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 01:43:05,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:43:05,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 822 [2023-09-01 01:43:05,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:43:05,547 INFO L130 PetriNetUnfolder]: 1029/1711 cut-off events. [2023-09-01 01:43:05,547 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-09-01 01:43:05,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3497 conditions, 1711 events. 1029/1711 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 8946 event pairs, 945 based on Foata normal form. 1/512 useless extension candidates. Maximal degree in co-relation 3484. Up to 1695 conditions per place. [2023-09-01 01:43:05,555 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 69 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-09-01 01:43:05,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 75 transitions, 422 flow [2023-09-01 01:43:05,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:43:05,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:43:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1076 transitions. [2023-09-01 01:43:05,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43633414436334145 [2023-09-01 01:43:05,560 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1076 transitions. [2023-09-01 01:43:05,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1076 transitions. [2023-09-01 01:43:05,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:43:05,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1076 transitions. [2023-09-01 01:43:05,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 358.6666666666667) internal successors, (1076), 3 states have internal predecessors, (1076), 0 states have call successors, (0), 0 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 01:43:05,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:05,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:05,567 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 284 flow. Second operand 3 states and 1076 transitions. [2023-09-01 01:43:05,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 75 transitions, 422 flow [2023-09-01 01:43:05,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 75 transitions, 417 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:43:05,569 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 279 flow [2023-09-01 01:43:05,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2023-09-01 01:43:05,570 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-09-01 01:43:05,570 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 279 flow [2023-09-01 01:43:05,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 341.6666666666667) internal successors, (1025), 3 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 01:43:05,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:43:05,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 01:43:05,586 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 01:43:05,786 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 01:43:05,786 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:43:05,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:43:05,787 INFO L85 PathProgramCache]: Analyzing trace with hash 456930193, now seen corresponding path program 1 times [2023-09-01 01:43:05,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:43:05,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041877934] [2023-09-01 01:43:05,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:43:05,788 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 01:43:05,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:43:05,789 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 01:43:05,793 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 01:43:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:43:05,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 01:43:05,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:43:05,919 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 01:43:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:43:05,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:43:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:43:06,212 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:43:06,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041877934] [2023-09-01 01:43:06,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041877934] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:43:06,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:43:06,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 01:43:06,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423874311] [2023-09-01 01:43:06,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:43:06,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 01:43:06,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:43:06,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 01:43:06,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-09-01 01:43:07,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 822 [2023-09-01 01:43:07,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 327.7142857142857) internal successors, (2294), 7 states have internal predecessors, (2294), 0 states have call successors, (0), 0 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 01:43:07,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:43:07,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 822 [2023-09-01 01:43:07,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:43:09,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:43:10,176 INFO L130 PetriNetUnfolder]: 1038/1725 cut-off events. [2023-09-01 01:43:10,177 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 01:43:10,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3539 conditions, 1725 events. 1038/1725 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 9175 event pairs, 945 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 3525. Up to 1678 conditions per place. [2023-09-01 01:43:10,183 INFO L137 encePairwiseOnDemand]: 812/822 looper letters, 63 selfloop transitions, 22 changer transitions 0/89 dead transitions. [2023-09-01 01:43:10,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 89 transitions, 498 flow [2023-09-01 01:43:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:43:10,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:43:10,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2357 transitions. [2023-09-01 01:43:10,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40962808481056656 [2023-09-01 01:43:10,191 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2357 transitions. [2023-09-01 01:43:10,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2357 transitions. [2023-09-01 01:43:10,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:43:10,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2357 transitions. [2023-09-01 01:43:10,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 336.7142857142857) internal successors, (2357), 7 states have internal predecessors, (2357), 0 states have call successors, (0), 0 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 01:43:10,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 822.0) internal successors, (6576), 8 states have internal predecessors, (6576), 0 states have call successors, (0), 0 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 01:43:10,205 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 822.0) internal successors, (6576), 8 states have internal predecessors, (6576), 0 states have call successors, (0), 0 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 01:43:10,205 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 279 flow. Second operand 7 states and 2357 transitions. [2023-09-01 01:43:10,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 89 transitions, 498 flow [2023-09-01 01:43:10,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 89 transitions, 494 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 01:43:10,208 INFO L231 Difference]: Finished difference. Result has 78 places, 89 transitions, 414 flow [2023-09-01 01:43:10,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=414, PETRI_PLACES=78, PETRI_TRANSITIONS=89} [2023-09-01 01:43:10,209 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 10 predicate places. [2023-09-01 01:43:10,209 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 414 flow [2023-09-01 01:43:10,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 327.7142857142857) internal successors, (2294), 7 states have internal predecessors, (2294), 0 states have call successors, (0), 0 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 01:43:10,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:43:10,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 01:43:10,228 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 01:43:10,428 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 01:43:10,428 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:43:10,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:43:10,429 INFO L85 PathProgramCache]: Analyzing trace with hash 456932131, now seen corresponding path program 1 times [2023-09-01 01:43:10,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:43:10,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954102612] [2023-09-01 01:43:10,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:43:10,429 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 01:43:10,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:43:10,430 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 01:43:10,431 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 01:43:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:43:10,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:43:10,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:43:10,620 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 01:43:10,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:43:10,719 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 01:43:10,720 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:43:10,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954102612] [2023-09-01 01:43:10,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954102612] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:43:10,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:43:10,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 01:43:10,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765725739] [2023-09-01 01:43:10,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:43:10,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:43:10,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:43:10,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:43:10,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:43:11,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 822 [2023-09-01 01:43:11,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 414 flow. Second operand has 10 states, 10 states have (on average 325.1) internal successors, (3251), 10 states have internal predecessors, (3251), 0 states have call successors, (0), 0 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 01:43:11,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:43:11,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 822 [2023-09-01 01:43:11,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:43:12,938 INFO L130 PetriNetUnfolder]: 2069/3437 cut-off events. [2023-09-01 01:43:12,938 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 01:43:12,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7096 conditions, 3437 events. 2069/3437 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 20531 event pairs, 1890 based on Foata normal form. 2/1038 useless extension candidates. Maximal degree in co-relation 7078. Up to 1698 conditions per place. [2023-09-01 01:43:12,953 INFO L137 encePairwiseOnDemand]: 814/822 looper letters, 137 selfloop transitions, 20 changer transitions 0/161 dead transitions. [2023-09-01 01:43:12,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 161 transitions, 1044 flow [2023-09-01 01:43:12,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 01:43:12,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 01:43:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3027 transitions. [2023-09-01 01:43:12,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4091646390916464 [2023-09-01 01:43:12,961 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3027 transitions. [2023-09-01 01:43:12,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3027 transitions. [2023-09-01 01:43:12,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:43:12,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3027 transitions. [2023-09-01 01:43:12,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 336.3333333333333) internal successors, (3027), 9 states have internal predecessors, (3027), 0 states have call successors, (0), 0 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 01:43:12,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 822.0) internal successors, (8220), 10 states have internal predecessors, (8220), 0 states have call successors, (0), 0 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 01:43:12,976 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 822.0) internal successors, (8220), 10 states have internal predecessors, (8220), 0 states have call successors, (0), 0 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 01:43:12,977 INFO L175 Difference]: Start difference. First operand has 78 places, 89 transitions, 414 flow. Second operand 9 states and 3027 transitions. [2023-09-01 01:43:12,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 161 transitions, 1044 flow [2023-09-01 01:43:12,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 161 transitions, 1003 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-09-01 01:43:12,980 INFO L231 Difference]: Finished difference. Result has 84 places, 96 transitions, 492 flow [2023-09-01 01:43:12,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=492, PETRI_PLACES=84, PETRI_TRANSITIONS=96} [2023-09-01 01:43:12,981 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 16 predicate places. [2023-09-01 01:43:12,981 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 96 transitions, 492 flow [2023-09-01 01:43:12,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 325.1) internal successors, (3251), 10 states have internal predecessors, (3251), 0 states have call successors, (0), 0 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 01:43:12,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:43:12,983 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 01:43:12,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 01:43:13,191 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 01:43:13,192 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:43:13,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:43:13,192 INFO L85 PathProgramCache]: Analyzing trace with hash 454982653, now seen corresponding path program 2 times [2023-09-01 01:43:13,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:43:13,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869875768] [2023-09-01 01:43:13,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:43:13,193 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:43:13,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:43:13,194 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 01:43:13,196 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 01:43:13,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:43:13,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:43:13,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:43:13,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:43:13,327 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:43:13,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 01:43:13,447 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 01:43:13,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:43:13,885 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 01:43:13,886 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:43:13,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869875768] [2023-09-01 01:43:13,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869875768] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:43:13,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:43:13,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:43:13,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590347482] [2023-09-01 01:43:13,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:43:13,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:43:13,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:43:13,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:43:13,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:43:19,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 822 [2023-09-01 01:43:19,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 96 transitions, 492 flow. Second operand has 12 states, 12 states have (on average 331.0) internal successors, (3972), 12 states have internal predecessors, (3972), 0 states have call successors, (0), 0 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 01:43:19,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:43:19,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 822 [2023-09-01 01:43:19,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:43:22,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:43:24,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:43:25,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:43:29,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:43:30,796 INFO L130 PetriNetUnfolder]: 2095/3495 cut-off events. [2023-09-01 01:43:30,796 INFO L131 PetriNetUnfolder]: For 244/244 co-relation queries the response was YES. [2023-09-01 01:43:30,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7376 conditions, 3495 events. 2095/3495 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 20904 event pairs, 1890 based on Foata normal form. 16/1104 useless extension candidates. Maximal degree in co-relation 7357. Up to 3378 conditions per place. [2023-09-01 01:43:30,814 INFO L137 encePairwiseOnDemand]: 814/822 looper letters, 76 selfloop transitions, 59 changer transitions 0/139 dead transitions. [2023-09-01 01:43:30,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 139 transitions, 1122 flow [2023-09-01 01:43:30,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 01:43:30,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 01:43:30,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 5058 transitions. [2023-09-01 01:43:30,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41021897810218977 [2023-09-01 01:43:30,825 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 5058 transitions. [2023-09-01 01:43:30,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 5058 transitions. [2023-09-01 01:43:30,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:43:30,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 5058 transitions. [2023-09-01 01:43:30,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 337.2) internal successors, (5058), 15 states have internal predecessors, (5058), 0 states have call successors, (0), 0 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 01:43:30,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 822.0) internal successors, (13152), 16 states have internal predecessors, (13152), 0 states have call successors, (0), 0 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 01:43:30,851 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 822.0) internal successors, (13152), 16 states have internal predecessors, (13152), 0 states have call successors, (0), 0 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 01:43:30,851 INFO L175 Difference]: Start difference. First operand has 84 places, 96 transitions, 492 flow. Second operand 15 states and 5058 transitions. [2023-09-01 01:43:30,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 139 transitions, 1122 flow [2023-09-01 01:43:30,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 139 transitions, 1117 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 01:43:30,857 INFO L231 Difference]: Finished difference. Result has 104 places, 130 transitions, 992 flow [2023-09-01 01:43:30,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=992, PETRI_PLACES=104, PETRI_TRANSITIONS=130} [2023-09-01 01:43:30,857 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 36 predicate places. [2023-09-01 01:43:30,858 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 130 transitions, 992 flow [2023-09-01 01:43:30,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 331.0) internal successors, (3972), 12 states have internal predecessors, (3972), 0 states have call successors, (0), 0 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 01:43:30,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:43:30,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:43:30,875 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 01:43:31,068 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 01:43:31,068 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:43:31,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:43:31,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1023477905, now seen corresponding path program 1 times [2023-09-01 01:43:31,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:43:31,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823046830] [2023-09-01 01:43:31,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:43:31,069 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 01:43:31,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:43:31,070 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 01:43:31,073 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 01:43:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:43:31,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 01:43:31,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:43:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:43:31,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:43:31,198 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:43:31,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823046830] [2023-09-01 01:43:31,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823046830] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:43:31,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:43:31,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:43:31,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877385832] [2023-09-01 01:43:31,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:43:31,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:43:31,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:43:31,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:43:31,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:43:31,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 822 [2023-09-01 01:43:31,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 130 transitions, 992 flow. Second operand has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 01:43:31,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:43:31,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 822 [2023-09-01 01:43:31,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:43:32,081 INFO L130 PetriNetUnfolder]: 2093/3493 cut-off events. [2023-09-01 01:43:32,082 INFO L131 PetriNetUnfolder]: For 401/401 co-relation queries the response was YES. [2023-09-01 01:43:32,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7520 conditions, 3493 events. 2093/3493 cut-off events. For 401/401 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 20931 event pairs, 1890 based on Foata normal form. 2/1093 useless extension candidates. Maximal degree in co-relation 7493. Up to 3450 conditions per place. [2023-09-01 01:43:32,096 INFO L137 encePairwiseOnDemand]: 817/822 looper letters, 111 selfloop transitions, 13 changer transitions 0/128 dead transitions. [2023-09-01 01:43:32,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 128 transitions, 1210 flow [2023-09-01 01:43:32,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:43:32,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:43:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1417 transitions. [2023-09-01 01:43:32,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4309610705596107 [2023-09-01 01:43:32,100 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1417 transitions. [2023-09-01 01:43:32,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1417 transitions. [2023-09-01 01:43:32,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:43:32,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1417 transitions. [2023-09-01 01:43:32,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 354.25) internal successors, (1417), 4 states have internal predecessors, (1417), 0 states have call successors, (0), 0 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 01:43:32,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 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 01:43:32,108 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 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 01:43:32,108 INFO L175 Difference]: Start difference. First operand has 104 places, 130 transitions, 992 flow. Second operand 4 states and 1417 transitions. [2023-09-01 01:43:32,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 128 transitions, 1210 flow [2023-09-01 01:43:32,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 128 transitions, 1076 flow, removed 38 selfloop flow, removed 4 redundant places. [2023-09-01 01:43:32,115 INFO L231 Difference]: Finished difference. Result has 103 places, 128 transitions, 854 flow [2023-09-01 01:43:32,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=854, PETRI_PLACES=103, PETRI_TRANSITIONS=128} [2023-09-01 01:43:32,116 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 35 predicate places. [2023-09-01 01:43:32,116 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 128 transitions, 854 flow [2023-09-01 01:43:32,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 01:43:32,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:43:32,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:43:32,129 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 01:43:32,329 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 01:43:32,329 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:43:32,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:43:32,329 INFO L85 PathProgramCache]: Analyzing trace with hash 110745844, now seen corresponding path program 1 times [2023-09-01 01:43:32,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:43:32,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684835736] [2023-09-01 01:43:32,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:43:32,330 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 01:43:32,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:43:32,331 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 01:43:32,332 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 01:43:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:43:32,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 01:43:32,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:43:32,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:43:32,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:43:32,525 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 01:43:32,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 01:43:32,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-09-01 01:43:32,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:43:32,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:43:32,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:43:32,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:43:32,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:43:32,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:43:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:43:32,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:43:32,726 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:43:32,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684835736] [2023-09-01 01:43:32,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684835736] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:43:32,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:43:32,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:43:32,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387693819] [2023-09-01 01:43:32,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:43:32,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:43:32,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:43:32,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:43:32,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:43:33,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 822 [2023-09-01 01:43:33,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 128 transitions, 854 flow. Second operand has 4 states, 4 states have (on average 343.25) internal successors, (1373), 4 states have internal predecessors, (1373), 0 states have call successors, (0), 0 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 01:43:33,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:43:33,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 822 [2023-09-01 01:43:33,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:43:33,730 INFO L130 PetriNetUnfolder]: 1563/2689 cut-off events. [2023-09-01 01:43:33,730 INFO L131 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2023-09-01 01:43:33,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5831 conditions, 2689 events. 1563/2689 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 15828 event pairs, 1396 based on Foata normal form. 0/963 useless extension candidates. Maximal degree in co-relation 5803. Up to 2657 conditions per place. [2023-09-01 01:43:33,743 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 119 selfloop transitions, 1 changer transitions 0/124 dead transitions. [2023-09-01 01:43:33,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 124 transitions, 1077 flow [2023-09-01 01:43:33,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:43:33,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:43:33,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1077 transitions. [2023-09-01 01:43:33,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367396593673966 [2023-09-01 01:43:33,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1077 transitions. [2023-09-01 01:43:33,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1077 transitions. [2023-09-01 01:43:33,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:43:33,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1077 transitions. [2023-09-01 01:43:33,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.0) internal successors, (1077), 3 states have internal predecessors, (1077), 0 states have call successors, (0), 0 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 01:43:33,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:33,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:33,753 INFO L175 Difference]: Start difference. First operand has 103 places, 128 transitions, 854 flow. Second operand 3 states and 1077 transitions. [2023-09-01 01:43:33,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 124 transitions, 1077 flow [2023-09-01 01:43:33,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 124 transitions, 1063 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:43:33,760 INFO L231 Difference]: Finished difference. Result has 101 places, 124 transitions, 825 flow [2023-09-01 01:43:33,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=825, PETRI_PLACES=101, PETRI_TRANSITIONS=124} [2023-09-01 01:43:33,761 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 33 predicate places. [2023-09-01 01:43:33,761 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 124 transitions, 825 flow [2023-09-01 01:43:33,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 343.25) internal successors, (1373), 4 states have internal predecessors, (1373), 0 states have call successors, (0), 0 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 01:43:33,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:43:33,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:43:33,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 01:43:33,972 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 01:43:33,972 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:43:33,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:43:33,974 INFO L85 PathProgramCache]: Analyzing trace with hash 110745843, now seen corresponding path program 1 times [2023-09-01 01:43:33,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:43:33,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115418203] [2023-09-01 01:43:33,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:43:33,975 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 01:43:33,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:43:33,976 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 01:43:33,978 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 01:43:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:43:34,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:43:34,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:43:34,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:43:34,177 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-09-01 01:43:34,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-09-01 01:43:34,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:43:34,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:43:34,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:43:34,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:43:34,297 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:43:34,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:43:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:43:34,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:43:34,322 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:43:34,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115418203] [2023-09-01 01:43:34,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115418203] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:43:34,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:43:34,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:43:34,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719468319] [2023-09-01 01:43:34,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:43:34,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:43:34,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:43:34,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:43:34,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:43:34,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 822 [2023-09-01 01:43:34,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 124 transitions, 825 flow. Second operand has 4 states, 4 states have (on average 345.25) internal successors, (1381), 4 states have internal predecessors, (1381), 0 states have call successors, (0), 0 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 01:43:34,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:43:34,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 822 [2023-09-01 01:43:34,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:43:35,068 INFO L130 PetriNetUnfolder]: 1033/1885 cut-off events. [2023-09-01 01:43:35,068 INFO L131 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2023-09-01 01:43:35,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4205 conditions, 1885 events. 1033/1885 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 10853 event pairs, 902 based on Foata normal form. 0/833 useless extension candidates. Maximal degree in co-relation 4177. Up to 1853 conditions per place. [2023-09-01 01:43:35,075 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 115 selfloop transitions, 1 changer transitions 0/120 dead transitions. [2023-09-01 01:43:35,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 120 transitions, 1040 flow [2023-09-01 01:43:35,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:43:35,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:43:35,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1081 transitions. [2023-09-01 01:43:35,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383617193836172 [2023-09-01 01:43:35,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1081 transitions. [2023-09-01 01:43:35,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1081 transitions. [2023-09-01 01:43:35,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:43:35,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1081 transitions. [2023-09-01 01:43:35,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.3333333333333) internal successors, (1081), 3 states have internal predecessors, (1081), 0 states have call successors, (0), 0 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 01:43:35,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:35,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:35,085 INFO L175 Difference]: Start difference. First operand has 101 places, 124 transitions, 825 flow. Second operand 3 states and 1081 transitions. [2023-09-01 01:43:35,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 120 transitions, 1040 flow [2023-09-01 01:43:35,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 120 transitions, 1039 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:43:35,091 INFO L231 Difference]: Finished difference. Result has 100 places, 120 transitions, 809 flow [2023-09-01 01:43:35,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=809, PETRI_PLACES=100, PETRI_TRANSITIONS=120} [2023-09-01 01:43:35,092 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 32 predicate places. [2023-09-01 01:43:35,092 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 120 transitions, 809 flow [2023-09-01 01:43:35,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 345.25) internal successors, (1381), 4 states have internal predecessors, (1381), 0 states have call successors, (0), 0 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 01:43:35,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:43:35,093 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:43:35,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-09-01 01:43:35,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:43:35,303 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:43:35,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:43:35,304 INFO L85 PathProgramCache]: Analyzing trace with hash -861844025, now seen corresponding path program 1 times [2023-09-01 01:43:35,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:43:35,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961500224] [2023-09-01 01:43:35,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:43:35,305 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 01:43:35,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:43:35,306 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:43:35,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 01:43:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:43:35,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 01:43:35,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:43:35,519 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 8 treesize of output 7 [2023-09-01 01:43:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:43:35,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:43:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:43:36,012 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:43:36,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961500224] [2023-09-01 01:43:36,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961500224] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:43:36,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:43:36,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-09-01 01:43:36,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162039051] [2023-09-01 01:43:36,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:43:36,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 01:43:36,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:43:36,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 01:43:36,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-09-01 01:43:41,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 822 [2023-09-01 01:43:41,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 120 transitions, 809 flow. Second operand has 13 states, 13 states have (on average 319.38461538461536) internal successors, (4152), 13 states have internal predecessors, (4152), 0 states have call successors, (0), 0 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 01:43:41,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:43:41,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 822 [2023-09-01 01:43:41,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:43:43,866 INFO L130 PetriNetUnfolder]: 3003/5435 cut-off events. [2023-09-01 01:43:43,867 INFO L131 PetriNetUnfolder]: For 541/541 co-relation queries the response was YES. [2023-09-01 01:43:43,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11398 conditions, 5435 events. 3003/5435 cut-off events. For 541/541 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 38778 event pairs, 2706 based on Foata normal form. 2/2281 useless extension candidates. Maximal degree in co-relation 11369. Up to 1834 conditions per place. [2023-09-01 01:43:43,889 INFO L137 encePairwiseOnDemand]: 813/822 looper letters, 182 selfloop transitions, 23 changer transitions 0/209 dead transitions. [2023-09-01 01:43:43,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 209 transitions, 1491 flow [2023-09-01 01:43:43,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:43:43,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:43:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2679 transitions. [2023-09-01 01:43:43,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073905109489051 [2023-09-01 01:43:43,895 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2679 transitions. [2023-09-01 01:43:43,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2679 transitions. [2023-09-01 01:43:43,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:43:43,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2679 transitions. [2023-09-01 01:43:43,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 334.875) internal successors, (2679), 8 states have internal predecessors, (2679), 0 states have call successors, (0), 0 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 01:43:43,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 822.0) internal successors, (7398), 9 states have internal predecessors, (7398), 0 states have call successors, (0), 0 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 01:43:43,906 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 822.0) internal successors, (7398), 9 states have internal predecessors, (7398), 0 states have call successors, (0), 0 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 01:43:43,906 INFO L175 Difference]: Start difference. First operand has 100 places, 120 transitions, 809 flow. Second operand 8 states and 2679 transitions. [2023-09-01 01:43:43,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 209 transitions, 1491 flow [2023-09-01 01:43:43,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 209 transitions, 1490 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:43:43,914 INFO L231 Difference]: Finished difference. Result has 109 places, 125 transitions, 927 flow [2023-09-01 01:43:43,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=927, PETRI_PLACES=109, PETRI_TRANSITIONS=125} [2023-09-01 01:43:43,915 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 41 predicate places. [2023-09-01 01:43:43,915 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 125 transitions, 927 flow [2023-09-01 01:43:43,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 319.38461538461536) internal successors, (4152), 13 states have internal predecessors, (4152), 0 states have call successors, (0), 0 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 01:43:43,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:43:43,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:43:43,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 01:43:44,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:43:44,126 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:43:44,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:43:44,127 INFO L85 PathProgramCache]: Analyzing trace with hash -861886181, now seen corresponding path program 1 times [2023-09-01 01:43:44,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:43:44,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086488477] [2023-09-01 01:43:44,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:43:44,127 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 01:43:44,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:43:44,128 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:43:44,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 01:43:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:43:44,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:43:44,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:43:44,351 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 01:43:44,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:43:44,491 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 01:43:44,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:43:44,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086488477] [2023-09-01 01:43:44,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086488477] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:43:44,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:43:44,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-09-01 01:43:44,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333648169] [2023-09-01 01:43:44,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:43:44,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:43:44,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:43:44,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:43:44,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:43:45,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 822 [2023-09-01 01:43:45,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 125 transitions, 927 flow. Second operand has 12 states, 12 states have (on average 325.4166666666667) internal successors, (3905), 12 states have internal predecessors, (3905), 0 states have call successors, (0), 0 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 01:43:45,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:43:45,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 822 [2023-09-01 01:43:45,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:43:47,048 INFO L130 PetriNetUnfolder]: 2019/3669 cut-off events. [2023-09-01 01:43:47,048 INFO L131 PetriNetUnfolder]: For 686/686 co-relation queries the response was YES. [2023-09-01 01:43:47,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7916 conditions, 3669 events. 2019/3669 cut-off events. For 686/686 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24150 event pairs, 1804 based on Foata normal form. 4/1569 useless extension candidates. Maximal degree in co-relation 7883. Up to 1815 conditions per place. [2023-09-01 01:43:47,062 INFO L137 encePairwiseOnDemand]: 813/822 looper letters, 131 selfloop transitions, 35 changer transitions 0/170 dead transitions. [2023-09-01 01:43:47,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 170 transitions, 1396 flow [2023-09-01 01:43:47,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 01:43:47,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 01:43:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3014 transitions. [2023-09-01 01:43:47,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2023-09-01 01:43:47,069 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3014 transitions. [2023-09-01 01:43:47,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3014 transitions. [2023-09-01 01:43:47,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:43:47,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3014 transitions. [2023-09-01 01:43:47,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 334.8888888888889) internal successors, (3014), 9 states have internal predecessors, (3014), 0 states have call successors, (0), 0 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 01:43:47,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 822.0) internal successors, (8220), 10 states have internal predecessors, (8220), 0 states have call successors, (0), 0 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 01:43:47,080 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 822.0) internal successors, (8220), 10 states have internal predecessors, (8220), 0 states have call successors, (0), 0 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 01:43:47,080 INFO L175 Difference]: Start difference. First operand has 109 places, 125 transitions, 927 flow. Second operand 9 states and 3014 transitions. [2023-09-01 01:43:47,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 170 transitions, 1396 flow [2023-09-01 01:43:47,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 170 transitions, 1366 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 01:43:47,089 INFO L231 Difference]: Finished difference. Result has 114 places, 126 transitions, 987 flow [2023-09-01 01:43:47,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=987, PETRI_PLACES=114, PETRI_TRANSITIONS=126} [2023-09-01 01:43:47,089 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 46 predicate places. [2023-09-01 01:43:47,090 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 126 transitions, 987 flow [2023-09-01 01:43:47,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 325.4166666666667) internal successors, (3905), 12 states have internal predecessors, (3905), 0 states have call successors, (0), 0 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 01:43:47,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:43:47,091 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-09-01 01:43:47,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 01:43:47,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:43:47,291 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:43:47,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:43:47,292 INFO L85 PathProgramCache]: Analyzing trace with hash -863609600, now seen corresponding path program 1 times [2023-09-01 01:43:47,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:43:47,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123944301] [2023-09-01 01:43:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:43:47,292 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 01:43:47,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:43:47,301 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:43:47,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 01:43:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:43:47,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 01:43:47,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:43:47,471 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 8 treesize of output 7 [2023-09-01 01:43:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:43:47,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:43:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:43:48,207 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:43:48,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123944301] [2023-09-01 01:43:48,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123944301] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:43:48,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:43:48,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-09-01 01:43:48,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434313387] [2023-09-01 01:43:48,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:43:48,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 01:43:48,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:43:48,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 01:43:48,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-09-01 01:43:59,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 822 [2023-09-01 01:43:59,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 126 transitions, 987 flow. Second operand has 17 states, 17 states have (on average 319.1764705882353) internal successors, (5426), 17 states have internal predecessors, (5426), 0 states have call successors, (0), 0 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 01:43:59,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:43:59,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 822 [2023-09-01 01:43:59,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:44:02,413 INFO L130 PetriNetUnfolder]: 3014/5474 cut-off events. [2023-09-01 01:44:02,413 INFO L131 PetriNetUnfolder]: For 1162/1162 co-relation queries the response was YES. [2023-09-01 01:44:02,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11732 conditions, 5474 events. 3014/5474 cut-off events. For 1162/1162 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 38132 event pairs, 2706 based on Foata normal form. 6/2324 useless extension candidates. Maximal degree in co-relation 11699. Up to 1805 conditions per place. [2023-09-01 01:44:02,433 INFO L137 encePairwiseOnDemand]: 813/822 looper letters, 216 selfloop transitions, 51 changer transitions 0/271 dead transitions. [2023-09-01 01:44:02,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 271 transitions, 2391 flow [2023-09-01 01:44:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 01:44:02,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 01:44:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4929 transitions. [2023-09-01 01:44:02,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997566909975669 [2023-09-01 01:44:02,441 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4929 transitions. [2023-09-01 01:44:02,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4929 transitions. [2023-09-01 01:44:02,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:44:02,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4929 transitions. [2023-09-01 01:44:02,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 328.6) internal successors, (4929), 15 states have internal predecessors, (4929), 0 states have call successors, (0), 0 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 01:44:02,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 822.0) internal successors, (13152), 16 states have internal predecessors, (13152), 0 states have call successors, (0), 0 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 01:44:02,456 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 822.0) internal successors, (13152), 16 states have internal predecessors, (13152), 0 states have call successors, (0), 0 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 01:44:02,456 INFO L175 Difference]: Start difference. First operand has 114 places, 126 transitions, 987 flow. Second operand 15 states and 4929 transitions. [2023-09-01 01:44:02,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 271 transitions, 2391 flow [2023-09-01 01:44:02,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 271 transitions, 2303 flow, removed 13 selfloop flow, removed 6 redundant places. [2023-09-01 01:44:02,469 INFO L231 Difference]: Finished difference. Result has 130 places, 155 transitions, 1527 flow [2023-09-01 01:44:02,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1527, PETRI_PLACES=130, PETRI_TRANSITIONS=155} [2023-09-01 01:44:02,470 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 62 predicate places. [2023-09-01 01:44:02,470 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 155 transitions, 1527 flow [2023-09-01 01:44:02,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 319.1764705882353) internal successors, (5426), 17 states have internal predecessors, (5426), 0 states have call successors, (0), 0 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 01:44:02,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:44:02,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:44:02,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-09-01 01:44:02,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:44:02,681 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:44:02,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:44:02,681 INFO L85 PathProgramCache]: Analyzing trace with hash -947396707, now seen corresponding path program 1 times [2023-09-01 01:44:02,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:44:02,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232250149] [2023-09-01 01:44:02,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:44:02,682 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 01:44:02,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:44:02,683 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:44:02,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 01:44:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:44:02,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 01:44:02,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:44:02,898 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:44:02,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 01:44:02,946 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:44:02,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:44:03,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:44:03,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 01:44:03,080 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:44:03,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 01:44:03,168 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:44:03,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 01:44:03,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 01:44:03,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:44:03,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 01:44:03,229 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:44:03,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:44:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:44:03,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:44:15,845 WARN L222 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:44:20,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:44:20,652 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:44:20,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232250149] [2023-09-01 01:44:20,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232250149] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:44:20,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:44:20,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-09-01 01:44:20,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306913112] [2023-09-01 01:44:20,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:44:20,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 01:44:20,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:44:20,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 01:44:20,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=79, Unknown=2, NotChecked=0, Total=110 [2023-09-01 01:44:22,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:44:24,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:44:27,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:44:29,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:44:31,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:44:33,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:44:35,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:44:38,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:44:41,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:44:43,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:44:45,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:44:48,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:44:51,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:44:53,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:44:56,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:44:58,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:00,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:03,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:05,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:06,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:09,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:12,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:14,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:17,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:19,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:21,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:26,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:28,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:30,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:32,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:35,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:37,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:42,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:44,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:46,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:49,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:52,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:55,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:45:58,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:46:00,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:46:02,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:46:05,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:46:08,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:46:10,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:46:10,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 822 [2023-09-01 01:46:10,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 155 transitions, 1527 flow. Second operand has 11 states, 11 states have (on average 247.0) internal successors, (2717), 11 states have internal predecessors, (2717), 0 states have call successors, (0), 0 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 01:46:10,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:10,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 822 [2023-09-01 01:46:10,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:22,096 WARN L222 SmtUtils]: Spent 10.98s on a formula simplification. DAG size of input: 56 DAG size of output: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:46:33,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:46:35,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:46:42,005 WARN L222 SmtUtils]: Spent 6.61s on a formula simplification. DAG size of input: 73 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:46:44,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:46:53,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:47:03,439 WARN L222 SmtUtils]: Spent 5.41s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:47:05,464 INFO L130 PetriNetUnfolder]: 2876/5245 cut-off events. [2023-09-01 01:47:05,464 INFO L131 PetriNetUnfolder]: For 1848/1848 co-relation queries the response was YES. [2023-09-01 01:47:05,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11596 conditions, 5245 events. 2876/5245 cut-off events. For 1848/1848 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 36520 event pairs, 2126 based on Foata normal form. 0/2321 useless extension candidates. Maximal degree in co-relation 11556. Up to 3392 conditions per place. [2023-09-01 01:47:05,483 INFO L137 encePairwiseOnDemand]: 801/822 looper letters, 242 selfloop transitions, 63 changer transitions 0/305 dead transitions. [2023-09-01 01:47:05,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 305 transitions, 2923 flow [2023-09-01 01:47:05,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 01:47:05,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 01:47:05,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4110 transitions. [2023-09-01 01:47:05,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125 [2023-09-01 01:47:05,492 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4110 transitions. [2023-09-01 01:47:05,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4110 transitions. [2023-09-01 01:47:05,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:05,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4110 transitions. [2023-09-01 01:47:05,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 256.875) internal successors, (4110), 16 states have internal predecessors, (4110), 0 states have call successors, (0), 0 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 01:47:05,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 822.0) internal successors, (13974), 17 states have internal predecessors, (13974), 0 states have call successors, (0), 0 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 01:47:05,507 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 822.0) internal successors, (13974), 17 states have internal predecessors, (13974), 0 states have call successors, (0), 0 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 01:47:05,507 INFO L175 Difference]: Start difference. First operand has 130 places, 155 transitions, 1527 flow. Second operand 16 states and 4110 transitions. [2023-09-01 01:47:05,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 305 transitions, 2923 flow [2023-09-01 01:47:05,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 305 transitions, 2882 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-09-01 01:47:05,522 INFO L231 Difference]: Finished difference. Result has 145 places, 175 transitions, 1965 flow [2023-09-01 01:47:05,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1965, PETRI_PLACES=145, PETRI_TRANSITIONS=175} [2023-09-01 01:47:05,523 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 77 predicate places. [2023-09-01 01:47:05,523 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 175 transitions, 1965 flow [2023-09-01 01:47:05,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 247.0) internal successors, (2717), 11 states have internal predecessors, (2717), 0 states have call successors, (0), 0 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 01:47:05,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:05,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:47:05,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-09-01 01:47:05,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:47:05,734 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:47:05,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:05,735 INFO L85 PathProgramCache]: Analyzing trace with hash -947396254, now seen corresponding path program 1 times [2023-09-01 01:47:05,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:47:05,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103475148] [2023-09-01 01:47:05,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:05,735 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 01:47:05,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:47:05,737 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:47:05,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 01:47:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:05,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 01:47:05,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:47:05,996 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 8 treesize of output 7 [2023-09-01 01:47:06,008 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 01:47:06,150 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:47:06,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 01:47:06,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 01:47:06,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:47:06,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 01:47:06,314 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:47:06,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:47:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:47:06,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:47:12,859 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 01:47:12,860 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 01:47:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:47:12,869 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:47:12,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103475148] [2023-09-01 01:47:12,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103475148] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:47:12,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:47:12,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2023-09-01 01:47:12,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275305205] [2023-09-01 01:47:12,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:47:12,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 01:47:12,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:47:12,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 01:47:12,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-09-01 01:47:19,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:47:35,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 822 [2023-09-01 01:47:35,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 175 transitions, 1965 flow. Second operand has 16 states, 16 states have (on average 295.375) internal successors, (4726), 16 states have internal predecessors, (4726), 0 states have call successors, (0), 0 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 01:47:35,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:35,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 822 [2023-09-01 01:47:35,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:41,168 WARN L222 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 53 DAG size of output: 50 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:48:03,333 WARN L222 SmtUtils]: Spent 16.78s on a formula simplification. DAG size of input: 76 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:48:25,133 WARN L222 SmtUtils]: Spent 21.25s on a formula simplification. DAG size of input: 73 DAG size of output: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:48:32,376 WARN L222 SmtUtils]: Spent 6.64s on a formula simplification. DAG size of input: 68 DAG size of output: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:48:42,957 INFO L130 PetriNetUnfolder]: 2714/5089 cut-off events. [2023-09-01 01:48:42,957 INFO L131 PetriNetUnfolder]: For 3061/3129 co-relation queries the response was YES. [2023-09-01 01:48:42,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13037 conditions, 5089 events. 2714/5089 cut-off events. For 3061/3129 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 36772 event pairs, 1466 based on Foata normal form. 26/2663 useless extension candidates. Maximal degree in co-relation 12991. Up to 2348 conditions per place. [2023-09-01 01:48:42,980 INFO L137 encePairwiseOnDemand]: 794/822 looper letters, 199 selfloop transitions, 110 changer transitions 0/311 dead transitions. [2023-09-01 01:48:42,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 311 transitions, 3126 flow [2023-09-01 01:48:42,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 01:48:42,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 01:48:42,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 5774 transitions. [2023-09-01 01:48:43,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697016263285952 [2023-09-01 01:48:43,028 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 5774 transitions. [2023-09-01 01:48:43,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 5774 transitions. [2023-09-01 01:48:43,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:48:43,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 5774 transitions. [2023-09-01 01:48:43,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 303.89473684210526) internal successors, (5774), 19 states have internal predecessors, (5774), 0 states have call successors, (0), 0 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 01:48:43,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 822.0) internal successors, (16440), 20 states have internal predecessors, (16440), 0 states have call successors, (0), 0 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 01:48:43,050 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 822.0) internal successors, (16440), 20 states have internal predecessors, (16440), 0 states have call successors, (0), 0 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 01:48:43,050 INFO L175 Difference]: Start difference. First operand has 145 places, 175 transitions, 1965 flow. Second operand 19 states and 5774 transitions. [2023-09-01 01:48:43,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 311 transitions, 3126 flow [2023-09-01 01:48:43,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 311 transitions, 2994 flow, removed 14 selfloop flow, removed 8 redundant places. [2023-09-01 01:48:43,072 INFO L231 Difference]: Finished difference. Result has 162 places, 209 transitions, 2463 flow [2023-09-01 01:48:43,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=1834, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2463, PETRI_PLACES=162, PETRI_TRANSITIONS=209} [2023-09-01 01:48:43,073 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 94 predicate places. [2023-09-01 01:48:43,073 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 209 transitions, 2463 flow [2023-09-01 01:48:43,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 295.375) internal successors, (4726), 16 states have internal predecessors, (4726), 0 states have call successors, (0), 0 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 01:48:43,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:48:43,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:48:43,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 01:48:43,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:48:43,285 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:48:43,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:48:43,285 INFO L85 PathProgramCache]: Analyzing trace with hash -947396284, now seen corresponding path program 1 times [2023-09-01 01:48:43,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:48:43,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851847310] [2023-09-01 01:48:43,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:48:43,286 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 01:48:43,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:48:43,287 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:48:43,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 01:48:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:48:43,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 01:48:43,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:48:43,502 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-09-01 01:48:43,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2023-09-01 01:48:43,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:48:43,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:48:43,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:48:43,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:48:43,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:48:43,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:48:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:48:43,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:48:43,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:48:43,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851847310] [2023-09-01 01:48:43,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851847310] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:48:43,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:48:43,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:48:43,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133703301] [2023-09-01 01:48:43,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:48:43,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:48:43,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:48:43,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:48:43,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:48:44,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 822 [2023-09-01 01:48:44,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 209 transitions, 2463 flow. Second operand has 5 states, 5 states have (on average 338.2) internal successors, (1691), 5 states have internal predecessors, (1691), 0 states have call successors, (0), 0 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 01:48:44,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:48:44,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 822 [2023-09-01 01:48:44,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:48:45,825 INFO L130 PetriNetUnfolder]: 2308/4418 cut-off events. [2023-09-01 01:48:45,825 INFO L131 PetriNetUnfolder]: For 5708/5845 co-relation queries the response was YES. [2023-09-01 01:48:45,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15348 conditions, 4418 events. 2308/4418 cut-off events. For 5708/5845 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 32224 event pairs, 1416 based on Foata normal form. 2/2553 useless extension candidates. Maximal degree in co-relation 15295. Up to 4327 conditions per place. [2023-09-01 01:48:45,847 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 201 selfloop transitions, 1 changer transitions 0/207 dead transitions. [2023-09-01 01:48:45,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 207 transitions, 2863 flow [2023-09-01 01:48:45,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:48:45,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:48:45,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1055 transitions. [2023-09-01 01:48:45,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278183292781833 [2023-09-01 01:48:45,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1055 transitions. [2023-09-01 01:48:45,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1055 transitions. [2023-09-01 01:48:45,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:48:45,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1055 transitions. [2023-09-01 01:48:45,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 351.6666666666667) internal successors, (1055), 3 states have internal predecessors, (1055), 0 states have call successors, (0), 0 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 01:48:45,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:48:45,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:48:45,853 INFO L175 Difference]: Start difference. First operand has 162 places, 209 transitions, 2463 flow. Second operand 3 states and 1055 transitions. [2023-09-01 01:48:45,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 207 transitions, 2863 flow [2023-09-01 01:48:45,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 207 transitions, 2793 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-09-01 01:48:45,874 INFO L231 Difference]: Finished difference. Result has 155 places, 207 transitions, 2391 flow [2023-09-01 01:48:45,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2391, PETRI_PLACES=155, PETRI_TRANSITIONS=207} [2023-09-01 01:48:45,875 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 87 predicate places. [2023-09-01 01:48:45,875 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 207 transitions, 2391 flow [2023-09-01 01:48:45,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 338.2) internal successors, (1691), 5 states have internal predecessors, (1691), 0 states have call successors, (0), 0 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 01:48:45,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:48:45,875 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:48:45,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 01:48:46,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:48:46,076 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:48:46,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:48:46,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1824027223, now seen corresponding path program 2 times [2023-09-01 01:48:46,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:48:46,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405929416] [2023-09-01 01:48:46,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:48:46,077 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 01:48:46,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:48:46,078 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:48:46,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 01:48:46,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:48:46,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:48:46,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 01:48:46,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:48:46,238 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 01:48:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 01:48:46,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:48:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 01:48:46,619 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:48:46,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [405929416] [2023-09-01 01:48:46,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [405929416] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:48:46,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:48:46,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2023-09-01 01:48:46,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020383475] [2023-09-01 01:48:46,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:48:46,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 01:48:46,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:48:46,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 01:48:46,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-09-01 01:48:50,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 822 [2023-09-01 01:48:50,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 207 transitions, 2391 flow. Second operand has 9 states, 9 states have (on average 330.0) internal successors, (2970), 9 states have internal predecessors, (2970), 0 states have call successors, (0), 0 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 01:48:50,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:48:50,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 822 [2023-09-01 01:48:50,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:48:52,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:48:53,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:48:55,128 WARN L539 Checker$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 01:48:59,423 INFO L130 PetriNetUnfolder]: 7516/14538 cut-off events. [2023-09-01 01:48:59,423 INFO L131 PetriNetUnfolder]: For 13049/13874 co-relation queries the response was YES. [2023-09-01 01:48:59,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48267 conditions, 14538 events. 7516/14538 cut-off events. For 13049/13874 co-relation queries the response was YES. Maximal size of possible extension queue 1047. Compared 129391 event pairs, 5050 based on Foata normal form. 18/8329 useless extension candidates. Maximal degree in co-relation 48216. Up to 4725 conditions per place. [2023-09-01 01:48:59,519 INFO L137 encePairwiseOnDemand]: 815/822 looper letters, 342 selfloop transitions, 96 changer transitions 0/443 dead transitions. [2023-09-01 01:48:59,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 443 transitions, 4701 flow [2023-09-01 01:48:59,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 01:48:59,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 01:48:59,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3145 transitions. [2023-09-01 01:48:59,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42511489591781565 [2023-09-01 01:48:59,526 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3145 transitions. [2023-09-01 01:48:59,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3145 transitions. [2023-09-01 01:48:59,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:48:59,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3145 transitions. [2023-09-01 01:48:59,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 349.44444444444446) internal successors, (3145), 9 states have internal predecessors, (3145), 0 states have call successors, (0), 0 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 01:48:59,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 822.0) internal successors, (8220), 10 states have internal predecessors, (8220), 0 states have call successors, (0), 0 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 01:48:59,538 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 822.0) internal successors, (8220), 10 states have internal predecessors, (8220), 0 states have call successors, (0), 0 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 01:48:59,538 INFO L175 Difference]: Start difference. First operand has 155 places, 207 transitions, 2391 flow. Second operand 9 states and 3145 transitions. [2023-09-01 01:48:59,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 443 transitions, 4701 flow [2023-09-01 01:48:59,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 443 transitions, 4700 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:48:59,706 INFO L231 Difference]: Finished difference. Result has 167 places, 212 transitions, 2775 flow [2023-09-01 01:48:59,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2775, PETRI_PLACES=167, PETRI_TRANSITIONS=212} [2023-09-01 01:48:59,707 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 99 predicate places. [2023-09-01 01:48:59,707 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 212 transitions, 2775 flow [2023-09-01 01:48:59,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 330.0) internal successors, (2970), 9 states have internal predecessors, (2970), 0 states have call successors, (0), 0 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 01:48:59,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:48:59,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:48:59,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-09-01 01:48:59,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:48:59,909 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:48:59,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:48:59,909 INFO L85 PathProgramCache]: Analyzing trace with hash -947396282, now seen corresponding path program 1 times [2023-09-01 01:48:59,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:48:59,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808479056] [2023-09-01 01:48:59,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:48:59,910 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:48:59,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:48:59,911 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:48:59,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 01:49:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:49:00,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 01:49:00,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:49:00,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:49:00,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:49:00,145 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 01:49:00,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 01:49:00,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 01:49:00,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:49:00,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:49:00,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:49:00,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:49:00,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:49:00,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:49:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:49:00,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:49:00,453 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:49:00,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808479056] [2023-09-01 01:49:00,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808479056] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:49:00,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:49:00,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:49:00,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617438309] [2023-09-01 01:49:00,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:49:00,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:49:00,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:49:00,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:49:00,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:49:00,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 822 [2023-09-01 01:49:00,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 212 transitions, 2775 flow. Second operand has 5 states, 5 states have (on average 341.2) internal successors, (1706), 5 states have internal predecessors, (1706), 0 states have call successors, (0), 0 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 01:49:00,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:49:00,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 822 [2023-09-01 01:49:00,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:49:03,378 INFO L130 PetriNetUnfolder]: 7082/13609 cut-off events. [2023-09-01 01:49:03,378 INFO L131 PetriNetUnfolder]: For 12125/12634 co-relation queries the response was YES. [2023-09-01 01:49:03,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46035 conditions, 13609 events. 7082/13609 cut-off events. For 12125/12634 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 121117 event pairs, 3787 based on Foata normal form. 10/8121 useless extension candidates. Maximal degree in co-relation 45979. Up to 13226 conditions per place. [2023-09-01 01:49:03,478 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 204 selfloop transitions, 1 changer transitions 0/210 dead transitions. [2023-09-01 01:49:03,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 210 transitions, 3181 flow [2023-09-01 01:49:03,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:49:03,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:49:03,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1062 transitions. [2023-09-01 01:49:03,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306569343065693 [2023-09-01 01:49:03,481 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1062 transitions. [2023-09-01 01:49:03,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1062 transitions. [2023-09-01 01:49:03,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:49:03,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1062 transitions. [2023-09-01 01:49:03,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.0) internal successors, (1062), 3 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:49:03,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:49:03,485 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:49:03,485 INFO L175 Difference]: Start difference. First operand has 167 places, 212 transitions, 2775 flow. Second operand 3 states and 1062 transitions. [2023-09-01 01:49:03,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 210 transitions, 3181 flow [2023-09-01 01:49:03,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 210 transitions, 3169 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 01:49:03,632 INFO L231 Difference]: Finished difference. Result has 166 places, 210 transitions, 2761 flow [2023-09-01 01:49:03,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=2759, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2761, PETRI_PLACES=166, PETRI_TRANSITIONS=210} [2023-09-01 01:49:03,632 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 98 predicate places. [2023-09-01 01:49:03,633 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 210 transitions, 2761 flow [2023-09-01 01:49:03,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 341.2) internal successors, (1706), 5 states have internal predecessors, (1706), 0 states have call successors, (0), 0 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 01:49:03,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:49:03,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:49:03,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-09-01 01:49:03,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:49:03,844 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:49:03,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:49:03,845 INFO L85 PathProgramCache]: Analyzing trace with hash 695483782, now seen corresponding path program 1 times [2023-09-01 01:49:03,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:49:03,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277155080] [2023-09-01 01:49:03,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:49:03,845 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 01:49:03,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:49:03,846 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:49:03,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-09-01 01:49:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:49:04,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:49:04,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:49:04,026 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 01:49:04,118 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:49:04,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 01:49:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:49:04,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:49:04,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:49:04,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277155080] [2023-09-01 01:49:04,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277155080] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:49:04,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:49:04,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:49:04,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634783392] [2023-09-01 01:49:04,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:49:04,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:49:04,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:49:04,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:49:04,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:49:04,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 822 [2023-09-01 01:49:04,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 210 transitions, 2761 flow. Second operand has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 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 01:49:04,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:49:04,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 822 [2023-09-01 01:49:04,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:49:06,750 INFO L130 PetriNetUnfolder]: 5692/11109 cut-off events. [2023-09-01 01:49:06,750 INFO L131 PetriNetUnfolder]: For 11730/12239 co-relation queries the response was YES. [2023-09-01 01:49:06,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37044 conditions, 11109 events. 5692/11109 cut-off events. For 11730/12239 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 96991 event pairs, 3113 based on Foata normal form. 10/7095 useless extension candidates. Maximal degree in co-relation 36987. Up to 10598 conditions per place. [2023-09-01 01:49:06,820 INFO L137 encePairwiseOnDemand]: 818/822 looper letters, 129 selfloop transitions, 68 changer transitions 0/202 dead transitions. [2023-09-01 01:49:06,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 202 transitions, 3095 flow [2023-09-01 01:49:06,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:49:06,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:49:06,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1379 transitions. [2023-09-01 01:49:06,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4194038929440389 [2023-09-01 01:49:06,822 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1379 transitions. [2023-09-01 01:49:06,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1379 transitions. [2023-09-01 01:49:06,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:49:06,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1379 transitions. [2023-09-01 01:49:06,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 344.75) internal successors, (1379), 4 states have internal predecessors, (1379), 0 states have call successors, (0), 0 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 01:49:06,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 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 01:49:06,825 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 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 01:49:06,825 INFO L175 Difference]: Start difference. First operand has 166 places, 210 transitions, 2761 flow. Second operand 4 states and 1379 transitions. [2023-09-01 01:49:06,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 202 transitions, 3095 flow [2023-09-01 01:49:06,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 202 transitions, 3094 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:49:06,916 INFO L231 Difference]: Finished difference. Result has 166 places, 202 transitions, 2836 flow [2023-09-01 01:49:06,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=2700, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2836, PETRI_PLACES=166, PETRI_TRANSITIONS=202} [2023-09-01 01:49:06,916 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 98 predicate places. [2023-09-01 01:49:06,917 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 202 transitions, 2836 flow [2023-09-01 01:49:06,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 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 01:49:06,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:49:06,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:49:06,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-09-01 01:49:07,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:49:07,117 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:49:07,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:49:07,118 INFO L85 PathProgramCache]: Analyzing trace with hash 695483783, now seen corresponding path program 1 times [2023-09-01 01:49:07,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:49:07,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704987391] [2023-09-01 01:49:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:49:07,118 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 01:49:07,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:49:07,119 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:49:07,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-09-01 01:49:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:49:07,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 01:49:07,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:49:07,423 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 01:49:07,433 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 8 treesize of output 7 [2023-09-01 01:49:07,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:49:07,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 01:49:07,530 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:49:07,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:49:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:49:07,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:49:09,955 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 01:49:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:49:10,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:49:10,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704987391] [2023-09-01 01:49:10,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704987391] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:49:10,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:49:10,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:49:10,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640746328] [2023-09-01 01:49:10,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:49:10,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:49:10,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:49:10,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:49:10,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:49:12,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:49:14,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:49:18,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:49:20,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:49:23,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:49:25,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:49:27,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:49:30,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:49:32,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:49:34,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:49:37,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:49:39,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:49:41,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:49:44,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:49:46,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:49:48,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:49:50,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:49:52,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:49:55,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:49:55,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 822 [2023-09-01 01:49:55,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 202 transitions, 2836 flow. Second operand has 12 states, 12 states have (on average 298.0) internal successors, (3576), 12 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:49:55,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:49:55,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 822 [2023-09-01 01:49:55,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:49:59,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:50:01,860 INFO L130 PetriNetUnfolder]: 5124/9845 cut-off events. [2023-09-01 01:50:01,860 INFO L131 PetriNetUnfolder]: For 13326/13674 co-relation queries the response was YES. [2023-09-01 01:50:01,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32178 conditions, 9845 events. 5124/9845 cut-off events. For 13326/13674 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 81734 event pairs, 3043 based on Foata normal form. 10/7114 useless extension candidates. Maximal degree in co-relation 32121. Up to 5606 conditions per place. [2023-09-01 01:50:01,933 INFO L137 encePairwiseOnDemand]: 815/822 looper letters, 170 selfloop transitions, 72 changer transitions 0/244 dead transitions. [2023-09-01 01:50:01,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 244 transitions, 3545 flow [2023-09-01 01:50:01,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 01:50:01,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 01:50:01,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3041 transitions. [2023-09-01 01:50:01,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36995133819951337 [2023-09-01 01:50:01,937 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3041 transitions. [2023-09-01 01:50:01,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3041 transitions. [2023-09-01 01:50:01,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:50:01,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3041 transitions. [2023-09-01 01:50:01,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 304.1) internal successors, (3041), 10 states have internal predecessors, (3041), 0 states have call successors, (0), 0 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 01:50:01,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 822.0) internal successors, (9042), 11 states have internal predecessors, (9042), 0 states have call successors, (0), 0 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 01:50:01,947 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 822.0) internal successors, (9042), 11 states have internal predecessors, (9042), 0 states have call successors, (0), 0 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 01:50:01,947 INFO L175 Difference]: Start difference. First operand has 166 places, 202 transitions, 2836 flow. Second operand 10 states and 3041 transitions. [2023-09-01 01:50:01,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 244 transitions, 3545 flow [2023-09-01 01:50:02,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 244 transitions, 3437 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:50:02,057 INFO L231 Difference]: Finished difference. Result has 171 places, 194 transitions, 2812 flow [2023-09-01 01:50:02,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=2668, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2812, PETRI_PLACES=171, PETRI_TRANSITIONS=194} [2023-09-01 01:50:02,058 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 103 predicate places. [2023-09-01 01:50:02,058 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 194 transitions, 2812 flow [2023-09-01 01:50:02,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 298.0) internal successors, (3576), 12 states have internal predecessors, (3576), 0 states have call successors, (0), 0 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 01:50:02,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:50:02,059 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 1, 1, 1, 1] [2023-09-01 01:50:02,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-09-01 01:50:02,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:50:02,265 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:50:02,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:50:02,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1103988290, now seen corresponding path program 1 times [2023-09-01 01:50:02,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:50:02,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113123295] [2023-09-01 01:50:02,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:50:02,265 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 01:50:02,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:50:02,266 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:50:02,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-09-01 01:50:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:50:02,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 01:50:02,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:50:02,392 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 8 treesize of output 7 [2023-09-01 01:50:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:50:02,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:50:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:50:04,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:50:04,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113123295] [2023-09-01 01:50:04,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113123295] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:50:04,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:50:04,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-09-01 01:50:04,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407199366] [2023-09-01 01:50:04,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:50:04,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 01:50:04,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:50:04,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 01:50:04,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-09-01 01:50:25,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 822 [2023-09-01 01:50:25,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 194 transitions, 2812 flow. Second operand has 20 states, 20 states have (on average 331.1) internal successors, (6622), 20 states have internal predecessors, (6622), 0 states have call successors, (0), 0 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 01:50:25,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:50:25,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 822 [2023-09-01 01:50:25,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:50:29,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:50:31,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:50:33,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:50:35,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:50:37,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:50:40,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:50:42,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:50:44,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:50:45,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:50:48,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:50:49,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:50:52,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:50:58,958 INFO L130 PetriNetUnfolder]: 4442/8892 cut-off events. [2023-09-01 01:50:58,958 INFO L131 PetriNetUnfolder]: For 16638/17196 co-relation queries the response was YES. [2023-09-01 01:50:58,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29740 conditions, 8892 events. 4442/8892 cut-off events. For 16638/17196 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 76258 event pairs, 2453 based on Foata normal form. 59/6222 useless extension candidates. Maximal degree in co-relation 29682. Up to 8368 conditions per place. [2023-09-01 01:50:59,021 INFO L137 encePairwiseOnDemand]: 814/822 looper letters, 105 selfloop transitions, 158 changer transitions 0/268 dead transitions. [2023-09-01 01:50:59,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 268 transitions, 4756 flow [2023-09-01 01:50:59,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 01:50:59,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 01:50:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 8040 transitions. [2023-09-01 01:50:59,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075425790754258 [2023-09-01 01:50:59,028 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 8040 transitions. [2023-09-01 01:50:59,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 8040 transitions. [2023-09-01 01:50:59,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:50:59,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 8040 transitions. [2023-09-01 01:50:59,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 335.0) internal successors, (8040), 24 states have internal predecessors, (8040), 0 states have call successors, (0), 0 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 01:50:59,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 822.0) internal successors, (20550), 25 states have internal predecessors, (20550), 0 states have call successors, (0), 0 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 01:50:59,052 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 822.0) internal successors, (20550), 25 states have internal predecessors, (20550), 0 states have call successors, (0), 0 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 01:50:59,052 INFO L175 Difference]: Start difference. First operand has 171 places, 194 transitions, 2812 flow. Second operand 24 states and 8040 transitions. [2023-09-01 01:50:59,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 268 transitions, 4756 flow [2023-09-01 01:50:59,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 268 transitions, 4696 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-09-01 01:50:59,160 INFO L231 Difference]: Finished difference. Result has 199 places, 253 transitions, 4474 flow [2023-09-01 01:50:59,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=2769, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4474, PETRI_PLACES=199, PETRI_TRANSITIONS=253} [2023-09-01 01:50:59,161 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 131 predicate places. [2023-09-01 01:50:59,162 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 253 transitions, 4474 flow [2023-09-01 01:50:59,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 331.1) internal successors, (6622), 20 states have internal predecessors, (6622), 0 states have call successors, (0), 0 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 01:50:59,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:50:59,163 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2023-09-01 01:50:59,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-09-01 01:50:59,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:50:59,373 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:50:59,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:50:59,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1486892958, now seen corresponding path program 2 times [2023-09-01 01:50:59,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:50:59,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387862092] [2023-09-01 01:50:59,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:50:59,374 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 01:50:59,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:50:59,375 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:50:59,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-09-01 01:50:59,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:50:59,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:50:59,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 01:50:59,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:50:59,541 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 01:50:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:50:59,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:51:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:51:00,600 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:51:00,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387862092] [2023-09-01 01:51:00,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387862092] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:51:00,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:51:00,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-09-01 01:51:00,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755521207] [2023-09-01 01:51:00,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:51:00,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 01:51:00,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:51:00,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 01:51:00,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-09-01 01:51:13,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 822 [2023-09-01 01:51:13,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 253 transitions, 4474 flow. Second operand has 15 states, 15 states have (on average 329.46666666666664) internal successors, (4942), 15 states have internal predecessors, (4942), 0 states have call successors, (0), 0 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 01:51:13,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:51:13,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 822 [2023-09-01 01:51:13,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:51:16,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:51:18,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:51:20,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:51:22,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:51:24,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:51:25,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:51:30,044 INFO L130 PetriNetUnfolder]: 4519/9021 cut-off events. [2023-09-01 01:51:30,044 INFO L131 PetriNetUnfolder]: For 19311/20125 co-relation queries the response was YES. [2023-09-01 01:51:30,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31321 conditions, 9021 events. 4519/9021 cut-off events. For 19311/20125 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 76847 event pairs, 3022 based on Foata normal form. 65/6349 useless extension candidates. Maximal degree in co-relation 31253. Up to 5988 conditions per place. [2023-09-01 01:51:30,101 INFO L137 encePairwiseOnDemand]: 815/822 looper letters, 161 selfloop transitions, 167 changer transitions 0/333 dead transitions. [2023-09-01 01:51:30,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 333 transitions, 6243 flow [2023-09-01 01:51:30,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 01:51:30,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 01:51:30,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 5349 transitions. [2023-09-01 01:51:30,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40670620437956206 [2023-09-01 01:51:30,107 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 5349 transitions. [2023-09-01 01:51:30,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 5349 transitions. [2023-09-01 01:51:30,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:51:30,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 5349 transitions. [2023-09-01 01:51:30,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 334.3125) internal successors, (5349), 16 states have internal predecessors, (5349), 0 states have call successors, (0), 0 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 01:51:30,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 822.0) internal successors, (13974), 17 states have internal predecessors, (13974), 0 states have call successors, (0), 0 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 01:51:30,121 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 822.0) internal successors, (13974), 17 states have internal predecessors, (13974), 0 states have call successors, (0), 0 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 01:51:30,121 INFO L175 Difference]: Start difference. First operand has 199 places, 253 transitions, 4474 flow. Second operand 16 states and 5349 transitions. [2023-09-01 01:51:30,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 333 transitions, 6243 flow [2023-09-01 01:51:30,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 333 transitions, 6035 flow, removed 65 selfloop flow, removed 7 redundant places. [2023-09-01 01:51:30,214 INFO L231 Difference]: Finished difference. Result has 216 places, 294 transitions, 5739 flow [2023-09-01 01:51:30,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=4266, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5739, PETRI_PLACES=216, PETRI_TRANSITIONS=294} [2023-09-01 01:51:30,214 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 148 predicate places. [2023-09-01 01:51:30,214 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 294 transitions, 5739 flow [2023-09-01 01:51:30,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 329.46666666666664) internal successors, (4942), 15 states have internal predecessors, (4942), 0 states have call successors, (0), 0 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 01:51:30,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:51:30,215 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:51:30,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-09-01 01:51:30,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:51:30,416 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:51:30,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:51:30,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1541585230, now seen corresponding path program 1 times [2023-09-01 01:51:30,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:51:30,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716189149] [2023-09-01 01:51:30,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:51:30,417 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 01:51:30,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:51:30,419 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:51:30,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-09-01 01:51:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:51:30,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:51:30,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:51:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:51:30,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:51:30,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:51:30,984 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:51:30,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716189149] [2023-09-01 01:51:30,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716189149] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:51:30,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:51:30,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-09-01 01:51:30,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811972432] [2023-09-01 01:51:30,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:51:30,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:51:30,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:51:30,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:51:30,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:51:34,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 822 [2023-09-01 01:51:34,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 294 transitions, 5739 flow. Second operand has 14 states, 14 states have (on average 325.42857142857144) internal successors, (4556), 14 states have internal predecessors, (4556), 0 states have call successors, (0), 0 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 01:51:34,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:51:34,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 822 [2023-09-01 01:51:34,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:51:38,153 INFO L130 PetriNetUnfolder]: 5620/11243 cut-off events. [2023-09-01 01:51:38,153 INFO L131 PetriNetUnfolder]: For 24813/25625 co-relation queries the response was YES. [2023-09-01 01:51:38,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39493 conditions, 11243 events. 5620/11243 cut-off events. For 24813/25625 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 99370 event pairs, 3095 based on Foata normal form. 12/7855 useless extension candidates. Maximal degree in co-relation 39415. Up to 5051 conditions per place. [2023-09-01 01:51:38,223 INFO L137 encePairwiseOnDemand]: 813/822 looper letters, 367 selfloop transitions, 93 changer transitions 0/465 dead transitions. [2023-09-01 01:51:38,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 465 transitions, 8672 flow [2023-09-01 01:51:38,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 01:51:38,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 01:51:38,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4975 transitions. [2023-09-01 01:51:38,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034874290348743 [2023-09-01 01:51:38,227 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4975 transitions. [2023-09-01 01:51:38,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4975 transitions. [2023-09-01 01:51:38,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:51:38,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4975 transitions. [2023-09-01 01:51:38,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 331.6666666666667) internal successors, (4975), 15 states have internal predecessors, (4975), 0 states have call successors, (0), 0 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 01:51:38,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 822.0) internal successors, (13152), 16 states have internal predecessors, (13152), 0 states have call successors, (0), 0 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 01:51:38,240 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 822.0) internal successors, (13152), 16 states have internal predecessors, (13152), 0 states have call successors, (0), 0 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 01:51:38,240 INFO L175 Difference]: Start difference. First operand has 216 places, 294 transitions, 5739 flow. Second operand 15 states and 4975 transitions. [2023-09-01 01:51:38,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 465 transitions, 8672 flow [2023-09-01 01:51:38,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 465 transitions, 8066 flow, removed 173 selfloop flow, removed 7 redundant places. [2023-09-01 01:51:38,369 INFO L231 Difference]: Finished difference. Result has 223 places, 291 transitions, 5455 flow [2023-09-01 01:51:38,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=5151, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5455, PETRI_PLACES=223, PETRI_TRANSITIONS=291} [2023-09-01 01:51:38,370 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 155 predicate places. [2023-09-01 01:51:38,370 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 291 transitions, 5455 flow [2023-09-01 01:51:38,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 325.42857142857144) internal successors, (4556), 14 states have internal predecessors, (4556), 0 states have call successors, (0), 0 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 01:51:38,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:51:38,371 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:51:38,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-09-01 01:51:38,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:51:38,571 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:51:38,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:51:38,572 INFO L85 PathProgramCache]: Analyzing trace with hash -710304319, now seen corresponding path program 2 times [2023-09-01 01:51:38,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:51:38,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652617664] [2023-09-01 01:51:38,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:51:38,572 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 01:51:38,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:51:38,573 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:51:38,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-09-01 01:51:38,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:51:38,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:51:38,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:51:38,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:51:38,686 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 01:51:38,715 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:51:38,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 01:51:38,736 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:51:38,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:51:38,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:51:38,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:51:38,751 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:51:38,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652617664] [2023-09-01 01:51:38,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652617664] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:51:38,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:51:38,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:51:38,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357275310] [2023-09-01 01:51:38,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:51:38,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:51:38,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:51:38,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:51:38,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:51:39,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 822 [2023-09-01 01:51:39,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 291 transitions, 5455 flow. Second operand has 4 states, 4 states have (on average 332.75) internal successors, (1331), 4 states have internal predecessors, (1331), 0 states have call successors, (0), 0 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 01:51:39,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:51:39,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 822 [2023-09-01 01:51:39,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:51:40,570 INFO L130 PetriNetUnfolder]: 3787/7413 cut-off events. [2023-09-01 01:51:40,570 INFO L131 PetriNetUnfolder]: For 24811/25063 co-relation queries the response was YES. [2023-09-01 01:51:40,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26316 conditions, 7413 events. 3787/7413 cut-off events. For 24811/25063 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 59239 event pairs, 1980 based on Foata normal form. 1064/6084 useless extension candidates. Maximal degree in co-relation 26238. Up to 7156 conditions per place. [2023-09-01 01:51:40,621 INFO L137 encePairwiseOnDemand]: 817/822 looper letters, 207 selfloop transitions, 73 changer transitions 0/283 dead transitions. [2023-09-01 01:51:40,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 283 transitions, 5957 flow [2023-09-01 01:51:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:51:40,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:51:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1360 transitions. [2023-09-01 01:51:40,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41362530413625304 [2023-09-01 01:51:40,623 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1360 transitions. [2023-09-01 01:51:40,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1360 transitions. [2023-09-01 01:51:40,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:51:40,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1360 transitions. [2023-09-01 01:51:40,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 340.0) internal successors, (1360), 4 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:51:40,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 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 01:51:40,626 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 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 01:51:40,626 INFO L175 Difference]: Start difference. First operand has 223 places, 291 transitions, 5455 flow. Second operand 4 states and 1360 transitions. [2023-09-01 01:51:40,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 283 transitions, 5957 flow [2023-09-01 01:51:40,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 283 transitions, 5697 flow, removed 5 selfloop flow, removed 9 redundant places. [2023-09-01 01:51:40,677 INFO L231 Difference]: Finished difference. Result has 214 places, 283 transitions, 5283 flow [2023-09-01 01:51:40,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=5137, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5283, PETRI_PLACES=214, PETRI_TRANSITIONS=283} [2023-09-01 01:51:40,678 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 146 predicate places. [2023-09-01 01:51:40,678 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 283 transitions, 5283 flow [2023-09-01 01:51:40,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 332.75) internal successors, (1331), 4 states have internal predecessors, (1331), 0 states have call successors, (0), 0 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 01:51:40,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:51:40,678 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 1, 1] [2023-09-01 01:51:40,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-09-01 01:51:40,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:51:40,879 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:51:40,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:51:40,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1158177454, now seen corresponding path program 3 times [2023-09-01 01:51:40,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:51:40,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450839400] [2023-09-01 01:51:40,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:51:40,880 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 01:51:40,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:51:40,880 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:51:40,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-09-01 01:51:41,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-09-01 01:51:41,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:51:41,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 01:51:41,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:51:41,181 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:51:41,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 01:51:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:51:41,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:51:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:51:44,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:51:44,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450839400] [2023-09-01 01:51:44,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450839400] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:51:44,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:51:44,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-09-01 01:51:44,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167936063] [2023-09-01 01:51:44,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:51:44,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 01:51:44,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:51:44,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 01:51:44,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2023-09-01 01:52:28,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 822 [2023-09-01 01:52:28,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 283 transitions, 5283 flow. Second operand has 26 states, 26 states have (on average 331.0) internal successors, (8606), 26 states have internal predecessors, (8606), 0 states have call successors, (0), 0 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 01:52:28,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:52:28,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 822 [2023-09-01 01:52:28,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:52:42,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:52:44,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:52:46,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:52:48,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:52:50,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:52:52,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:52:54,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:52:55,965 WARN L539 Checker$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 01:52:57,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:52:59,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:53:01,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:53:10,896 INFO L130 PetriNetUnfolder]: 3810/7486 cut-off events. [2023-09-01 01:53:10,896 INFO L131 PetriNetUnfolder]: For 23904/24112 co-relation queries the response was YES. [2023-09-01 01:53:10,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26921 conditions, 7486 events. 3810/7486 cut-off events. For 23904/24112 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 59710 event pairs, 1961 based on Foata normal form. 12/5105 useless extension candidates. Maximal degree in co-relation 26845. Up to 6977 conditions per place. [2023-09-01 01:53:10,952 INFO L137 encePairwiseOnDemand]: 815/822 looper letters, 125 selfloop transitions, 211 changer transitions 0/339 dead transitions. [2023-09-01 01:53:10,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 339 transitions, 6745 flow [2023-09-01 01:53:10,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 01:53:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 01:53:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 8706 transitions. [2023-09-01 01:53:10,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073554183043234 [2023-09-01 01:53:10,961 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 8706 transitions. [2023-09-01 01:53:10,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 8706 transitions. [2023-09-01 01:53:10,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:53:10,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 8706 transitions. [2023-09-01 01:53:10,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 334.84615384615387) internal successors, (8706), 26 states have internal predecessors, (8706), 0 states have call successors, (0), 0 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 01:53:10,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 822.0) internal successors, (22194), 27 states have internal predecessors, (22194), 0 states have call successors, (0), 0 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 01:53:10,984 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 822.0) internal successors, (22194), 27 states have internal predecessors, (22194), 0 states have call successors, (0), 0 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 01:53:10,984 INFO L175 Difference]: Start difference. First operand has 214 places, 283 transitions, 5283 flow. Second operand 26 states and 8706 transitions. [2023-09-01 01:53:10,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 339 transitions, 6745 flow [2023-09-01 01:53:11,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 339 transitions, 6659 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-09-01 01:53:11,051 INFO L231 Difference]: Finished difference. Result has 249 places, 316 transitions, 6383 flow [2023-09-01 01:53:11,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=5197, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6383, PETRI_PLACES=249, PETRI_TRANSITIONS=316} [2023-09-01 01:53:11,052 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 181 predicate places. [2023-09-01 01:53:11,052 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 316 transitions, 6383 flow [2023-09-01 01:53:11,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 331.0) internal successors, (8606), 26 states have internal predecessors, (8606), 0 states have call successors, (0), 0 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 01:53:11,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:53:11,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:53:11,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-09-01 01:53:11,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:53:11,254 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:53:11,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:53:11,254 INFO L85 PathProgramCache]: Analyzing trace with hash -543339933, now seen corresponding path program 2 times [2023-09-01 01:53:11,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:53:11,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428518863] [2023-09-01 01:53:11,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:53:11,254 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 01:53:11,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:53:11,255 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:53:11,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-09-01 01:53:11,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:53:11,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:53:11,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 01:53:11,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:53:11,426 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 01:53:11,436 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 10 treesize of output 9 [2023-09-01 01:53:11,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:53:11,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 01:53:11,575 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:53:11,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 01:53:11,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:53:11,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 01:53:11,700 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:53:11,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:53:11,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 01:53:11,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:53:11,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:53:11,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428518863] [2023-09-01 01:53:11,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428518863] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:53:11,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:53:11,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:53:11,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872749584] [2023-09-01 01:53:11,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:53:11,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:53:11,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:53:11,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:53:11,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:53:13,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 822 [2023-09-01 01:53:13,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 316 transitions, 6383 flow. Second operand has 6 states, 6 states have (on average 321.8333333333333) internal successors, (1931), 6 states have internal predecessors, (1931), 0 states have call successors, (0), 0 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 01:53:13,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:53:13,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 822 [2023-09-01 01:53:13,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:53:14,877 INFO L130 PetriNetUnfolder]: 3438/6539 cut-off events. [2023-09-01 01:53:14,877 INFO L131 PetriNetUnfolder]: For 24751/24939 co-relation queries the response was YES. [2023-09-01 01:53:14,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24467 conditions, 6539 events. 3438/6539 cut-off events. For 24751/24939 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 49015 event pairs, 1695 based on Foata normal form. 182/4599 useless extension candidates. Maximal degree in co-relation 24379. Up to 6348 conditions per place. [2023-09-01 01:53:14,935 INFO L137 encePairwiseOnDemand]: 817/822 looper letters, 214 selfloop transitions, 97 changer transitions 0/313 dead transitions. [2023-09-01 01:53:14,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 313 transitions, 6977 flow [2023-09-01 01:53:14,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:53:14,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:53:14,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1638 transitions. [2023-09-01 01:53:14,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39854014598540144 [2023-09-01 01:53:14,938 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1638 transitions. [2023-09-01 01:53:14,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1638 transitions. [2023-09-01 01:53:14,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:53:14,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1638 transitions. [2023-09-01 01:53:14,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 327.6) internal successors, (1638), 5 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 01:53:14,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 822.0) internal successors, (4932), 6 states have internal predecessors, (4932), 0 states have call successors, (0), 0 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 01:53:14,941 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 822.0) internal successors, (4932), 6 states have internal predecessors, (4932), 0 states have call successors, (0), 0 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 01:53:14,941 INFO L175 Difference]: Start difference. First operand has 249 places, 316 transitions, 6383 flow. Second operand 5 states and 1638 transitions. [2023-09-01 01:53:14,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 313 transitions, 6977 flow [2023-09-01 01:53:15,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 313 transitions, 6626 flow, removed 33 selfloop flow, removed 14 redundant places. [2023-09-01 01:53:15,006 INFO L231 Difference]: Finished difference. Result has 237 places, 313 transitions, 6198 flow [2023-09-01 01:53:15,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=6004, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6198, PETRI_PLACES=237, PETRI_TRANSITIONS=313} [2023-09-01 01:53:15,007 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 169 predicate places. [2023-09-01 01:53:15,007 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 313 transitions, 6198 flow [2023-09-01 01:53:15,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 321.8333333333333) internal successors, (1931), 6 states have internal predecessors, (1931), 0 states have call successors, (0), 0 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 01:53:15,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:53:15,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:53:15,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-09-01 01:53:15,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:53:15,212 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:53:15,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:53:15,212 INFO L85 PathProgramCache]: Analyzing trace with hash 85270872, now seen corresponding path program 1 times [2023-09-01 01:53:15,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:53:15,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889080296] [2023-09-01 01:53:15,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:53:15,213 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 01:53:15,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:53:15,213 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:53:15,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-09-01 01:53:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:53:15,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:53:15,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:53:15,376 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 01:53:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:53:15,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:53:15,407 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:53:15,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889080296] [2023-09-01 01:53:15,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889080296] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:53:15,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:53:15,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:53:15,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772640651] [2023-09-01 01:53:15,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:53:15,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:53:15,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:53:15,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:53:15,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:53:15,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 822 [2023-09-01 01:53:15,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 313 transitions, 6198 flow. Second operand has 4 states, 4 states have (on average 337.25) internal successors, (1349), 4 states have internal predecessors, (1349), 0 states have call successors, (0), 0 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 01:53:15,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:53:15,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 822 [2023-09-01 01:53:15,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:53:16,781 INFO L130 PetriNetUnfolder]: 2482/4891 cut-off events. [2023-09-01 01:53:16,782 INFO L131 PetriNetUnfolder]: For 23049/23217 co-relation queries the response was YES. [2023-09-01 01:53:16,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19032 conditions, 4891 events. 2482/4891 cut-off events. For 23049/23217 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 35351 event pairs, 1223 based on Foata normal form. 0/3703 useless extension candidates. Maximal degree in co-relation 18947. Up to 4197 conditions per place. [2023-09-01 01:53:16,822 INFO L137 encePairwiseOnDemand]: 818/822 looper letters, 228 selfloop transitions, 77 changer transitions 0/307 dead transitions. [2023-09-01 01:53:16,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 307 transitions, 6767 flow [2023-09-01 01:53:16,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:53:16,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:53:16,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1372 transitions. [2023-09-01 01:53:16,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4172749391727494 [2023-09-01 01:53:16,825 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1372 transitions. [2023-09-01 01:53:16,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1372 transitions. [2023-09-01 01:53:16,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:53:16,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1372 transitions. [2023-09-01 01:53:16,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 343.0) internal successors, (1372), 4 states have internal predecessors, (1372), 0 states have call successors, (0), 0 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 01:53:16,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 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 01:53:16,827 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 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 01:53:16,827 INFO L175 Difference]: Start difference. First operand has 237 places, 313 transitions, 6198 flow. Second operand 4 states and 1372 transitions. [2023-09-01 01:53:16,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 307 transitions, 6767 flow [2023-09-01 01:53:16,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 307 transitions, 6645 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:53:16,883 INFO L231 Difference]: Finished difference. Result has 235 places, 307 transitions, 6189 flow [2023-09-01 01:53:16,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=6035, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6189, PETRI_PLACES=235, PETRI_TRANSITIONS=307} [2023-09-01 01:53:16,884 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 167 predicate places. [2023-09-01 01:53:16,884 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 307 transitions, 6189 flow [2023-09-01 01:53:16,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 337.25) internal successors, (1349), 4 states have internal predecessors, (1349), 0 states have call successors, (0), 0 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 01:53:16,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:53:16,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:53:16,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2023-09-01 01:53:17,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:53:17,087 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:53:17,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:53:17,087 INFO L85 PathProgramCache]: Analyzing trace with hash 85270873, now seen corresponding path program 1 times [2023-09-01 01:53:17,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:53:17,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916443680] [2023-09-01 01:53:17,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:53:17,087 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:53:17,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:53:17,088 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:53:17,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-09-01 01:53:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:53:17,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 01:53:17,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:53:17,343 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 01:53:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:53:17,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:53:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:53:18,165 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:53:18,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916443680] [2023-09-01 01:53:18,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916443680] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:53:18,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:53:18,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-09-01 01:53:18,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065263275] [2023-09-01 01:53:18,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:53:18,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 01:53:18,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:53:18,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 01:53:18,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2023-09-01 01:53:28,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 822 [2023-09-01 01:53:28,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 307 transitions, 6189 flow. Second operand has 15 states, 15 states have (on average 307.73333333333335) internal successors, (4616), 15 states have internal predecessors, (4616), 0 states have call successors, (0), 0 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 01:53:28,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:53:28,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 822 [2023-09-01 01:53:28,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:53:31,962 INFO L130 PetriNetUnfolder]: 2544/5185 cut-off events. [2023-09-01 01:53:31,962 INFO L131 PetriNetUnfolder]: For 23694/23862 co-relation queries the response was YES. [2023-09-01 01:53:31,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19622 conditions, 5185 events. 2544/5185 cut-off events. For 23694/23862 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 38964 event pairs, 1077 based on Foata normal form. 0/4147 useless extension candidates. Maximal degree in co-relation 19538. Up to 2355 conditions per place. [2023-09-01 01:53:32,007 INFO L137 encePairwiseOnDemand]: 809/822 looper letters, 250 selfloop transitions, 132 changer transitions 0/384 dead transitions. [2023-09-01 01:53:32,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 384 transitions, 7345 flow [2023-09-01 01:53:32,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 01:53:32,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 01:53:32,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4387 transitions. [2023-09-01 01:53:32,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38121306916927356 [2023-09-01 01:53:32,013 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4387 transitions. [2023-09-01 01:53:32,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4387 transitions. [2023-09-01 01:53:32,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:53:32,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4387 transitions. [2023-09-01 01:53:32,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 313.35714285714283) internal successors, (4387), 14 states have internal predecessors, (4387), 0 states have call successors, (0), 0 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 01:53:32,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 822.0) internal successors, (12330), 15 states have internal predecessors, (12330), 0 states have call successors, (0), 0 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 01:53:32,025 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 822.0) internal successors, (12330), 15 states have internal predecessors, (12330), 0 states have call successors, (0), 0 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 01:53:32,025 INFO L175 Difference]: Start difference. First operand has 235 places, 307 transitions, 6189 flow. Second operand 14 states and 4387 transitions. [2023-09-01 01:53:32,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 384 transitions, 7345 flow [2023-09-01 01:53:32,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 384 transitions, 7194 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:53:32,110 INFO L231 Difference]: Finished difference. Result has 250 places, 312 transitions, 6477 flow [2023-09-01 01:53:32,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=6032, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6477, PETRI_PLACES=250, PETRI_TRANSITIONS=312} [2023-09-01 01:53:32,110 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 182 predicate places. [2023-09-01 01:53:32,111 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 312 transitions, 6477 flow [2023-09-01 01:53:32,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 307.73333333333335) internal successors, (4616), 15 states have internal predecessors, (4616), 0 states have call successors, (0), 0 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 01:53:32,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:53:32,111 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:53:32,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2023-09-01 01:53:32,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:53:32,312 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:53:32,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:53:32,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1836338714, now seen corresponding path program 2 times [2023-09-01 01:53:32,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:53:32,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6575938] [2023-09-01 01:53:32,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:53:32,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:53:32,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:53:32,314 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:53:32,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-09-01 01:53:32,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:53:32,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:53:32,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 01:53:32,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:53:32,517 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 8 treesize of output 7 [2023-09-01 01:53:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 01:53:32,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:53:32,647 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:53:32,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6575938] [2023-09-01 01:53:32,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6575938] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:53:32,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:53:32,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:53:32,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069915507] [2023-09-01 01:53:32,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:53:32,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:53:32,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:53:32,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:53:32,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:53:33,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 822 [2023-09-01 01:53:33,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 312 transitions, 6477 flow. Second operand has 6 states, 6 states have (on average 336.1666666666667) internal successors, (2017), 6 states have internal predecessors, (2017), 0 states have call successors, (0), 0 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 01:53:33,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:53:33,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 822 [2023-09-01 01:53:33,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:53:34,637 INFO L130 PetriNetUnfolder]: 1960/4057 cut-off events. [2023-09-01 01:53:34,637 INFO L131 PetriNetUnfolder]: For 31767/31935 co-relation queries the response was YES. [2023-09-01 01:53:34,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17607 conditions, 4057 events. 1960/4057 cut-off events. For 31767/31935 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 29189 event pairs, 981 based on Foata normal form. 344/3883 useless extension candidates. Maximal degree in co-relation 17518. Up to 3363 conditions per place. [2023-09-01 01:53:34,670 INFO L137 encePairwiseOnDemand]: 816/822 looper letters, 197 selfloop transitions, 108 changer transitions 0/307 dead transitions. [2023-09-01 01:53:34,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 307 transitions, 7038 flow [2023-09-01 01:53:34,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:53:34,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:53:34,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2038 transitions. [2023-09-01 01:53:34,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41321978913219787 [2023-09-01 01:53:34,673 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2038 transitions. [2023-09-01 01:53:34,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2038 transitions. [2023-09-01 01:53:34,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:53:34,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2038 transitions. [2023-09-01 01:53:34,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 339.6666666666667) internal successors, (2038), 6 states have internal predecessors, (2038), 0 states have call successors, (0), 0 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 01:53:34,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 822.0) internal successors, (5754), 7 states have internal predecessors, (5754), 0 states have call successors, (0), 0 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 01:53:34,676 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 822.0) internal successors, (5754), 7 states have internal predecessors, (5754), 0 states have call successors, (0), 0 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 01:53:34,676 INFO L175 Difference]: Start difference. First operand has 250 places, 312 transitions, 6477 flow. Second operand 6 states and 2038 transitions. [2023-09-01 01:53:34,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 307 transitions, 7038 flow [2023-09-01 01:53:34,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 307 transitions, 6684 flow, removed 2 selfloop flow, removed 13 redundant places. [2023-09-01 01:53:34,735 INFO L231 Difference]: Finished difference. Result has 240 places, 307 transitions, 6290 flow [2023-09-01 01:53:34,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=6074, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6290, PETRI_PLACES=240, PETRI_TRANSITIONS=307} [2023-09-01 01:53:34,735 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 172 predicate places. [2023-09-01 01:53:34,735 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 307 transitions, 6290 flow [2023-09-01 01:53:34,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 336.1666666666667) internal successors, (2017), 6 states have internal predecessors, (2017), 0 states have call successors, (0), 0 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 01:53:34,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:53:34,736 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:53:34,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2023-09-01 01:53:34,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:53:34,936 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:53:34,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:53:34,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1876616425, now seen corresponding path program 3 times [2023-09-01 01:53:34,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:53:34,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712900959] [2023-09-01 01:53:34,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:53:34,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:53:34,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:53:34,938 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:53:34,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-09-01 01:53:35,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 01:53:35,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:53:35,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 01:53:35,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:53:35,140 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 8 treesize of output 7 [2023-09-01 01:53:35,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-09-01 01:53:35,311 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 01:53:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-09-01 01:53:35,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:53:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 01:53:36,614 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:53:36,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712900959] [2023-09-01 01:53:36,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712900959] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:53:36,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:53:36,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 10 [2023-09-01 01:53:36,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083180807] [2023-09-01 01:53:36,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:53:36,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 01:53:36,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:53:36,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 01:53:36,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-09-01 01:53:45,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 822 [2023-09-01 01:53:45,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 307 transitions, 6290 flow. Second operand has 11 states, 11 states have (on average 315.90909090909093) internal successors, (3475), 11 states have internal predecessors, (3475), 0 states have call successors, (0), 0 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 01:53:45,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:53:45,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 822 [2023-09-01 01:53:45,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:53:54,190 WARN L222 SmtUtils]: Spent 7.87s on a formula simplification. DAG size of input: 47 DAG size of output: 44 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:53:55,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:53:59,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:54:02,543 INFO L130 PetriNetUnfolder]: 3180/6548 cut-off events. [2023-09-01 01:54:02,543 INFO L131 PetriNetUnfolder]: For 31183/31491 co-relation queries the response was YES. [2023-09-01 01:54:02,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25760 conditions, 6548 events. 3180/6548 cut-off events. For 31183/31491 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 52106 event pairs, 1650 based on Foata normal form. 27/5678 useless extension candidates. Maximal degree in co-relation 25675. Up to 3842 conditions per place. [2023-09-01 01:54:02,602 INFO L137 encePairwiseOnDemand]: 814/822 looper letters, 256 selfloop transitions, 120 changer transitions 0/378 dead transitions. [2023-09-01 01:54:02,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 378 transitions, 7720 flow [2023-09-01 01:54:02,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 01:54:02,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 01:54:02,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3203 transitions. [2023-09-01 01:54:02,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896593673965937 [2023-09-01 01:54:02,607 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3203 transitions. [2023-09-01 01:54:02,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3203 transitions. [2023-09-01 01:54:02,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:54:02,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3203 transitions. [2023-09-01 01:54:02,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 320.3) internal successors, (3203), 10 states have internal predecessors, (3203), 0 states have call successors, (0), 0 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 01:54:02,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 822.0) internal successors, (9042), 11 states have internal predecessors, (9042), 0 states have call successors, (0), 0 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 01:54:02,613 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 822.0) internal successors, (9042), 11 states have internal predecessors, (9042), 0 states have call successors, (0), 0 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 01:54:02,613 INFO L175 Difference]: Start difference. First operand has 240 places, 307 transitions, 6290 flow. Second operand 10 states and 3203 transitions. [2023-09-01 01:54:02,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 378 transitions, 7720 flow [2023-09-01 01:54:02,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 378 transitions, 6806 flow, removed 16 selfloop flow, removed 23 redundant places. [2023-09-01 01:54:02,672 INFO L231 Difference]: Finished difference. Result has 220 places, 316 transitions, 5984 flow [2023-09-01 01:54:02,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=5324, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5984, PETRI_PLACES=220, PETRI_TRANSITIONS=316} [2023-09-01 01:54:02,673 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 152 predicate places. [2023-09-01 01:54:02,673 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 316 transitions, 5984 flow [2023-09-01 01:54:02,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 315.90909090909093) internal successors, (3475), 11 states have internal predecessors, (3475), 0 states have call successors, (0), 0 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 01:54:02,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:54:02,674 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:54:02,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2023-09-01 01:54:02,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:54:02,874 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:54:02,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:54:02,874 INFO L85 PathProgramCache]: Analyzing trace with hash -549878242, now seen corresponding path program 1 times [2023-09-01 01:54:02,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:54:02,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626014861] [2023-09-01 01:54:02,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:54:02,875 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 01:54:02,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:54:02,876 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:54:02,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2023-09-01 01:54:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:54:03,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 01:54:03,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:54:03,129 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:54:03,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 01:54:03,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-09-01 01:54:03,823 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:54:03,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:54:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:54:04,923 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:54:04,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626014861] [2023-09-01 01:54:04,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626014861] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:54:04,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:54:04,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-09-01 01:54:04,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152298257] [2023-09-01 01:54:04,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:54:04,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 01:54:04,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:54:04,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 01:54:04,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2023-09-01 01:54:23,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 822 [2023-09-01 01:54:23,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 316 transitions, 5984 flow. Second operand has 20 states, 20 states have (on average 313.25) internal successors, (6265), 20 states have internal predecessors, (6265), 0 states have call successors, (0), 0 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 01:54:23,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:54:23,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 822 [2023-09-01 01:54:23,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:54:29,755 INFO L130 PetriNetUnfolder]: 4334/9101 cut-off events. [2023-09-01 01:54:29,756 INFO L131 PetriNetUnfolder]: For 30120/30762 co-relation queries the response was YES. [2023-09-01 01:54:29,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34214 conditions, 9101 events. 4334/9101 cut-off events. For 30120/30762 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 77002 event pairs, 2317 based on Foata normal form. 24/7737 useless extension candidates. Maximal degree in co-relation 34142. Up to 3597 conditions per place. [2023-09-01 01:54:29,826 INFO L137 encePairwiseOnDemand]: 815/822 looper letters, 507 selfloop transitions, 76 changer transitions 0/585 dead transitions. [2023-09-01 01:54:29,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 585 transitions, 11265 flow [2023-09-01 01:54:29,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 01:54:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 01:54:29,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 5403 transitions. [2023-09-01 01:54:29,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866466294547016 [2023-09-01 01:54:29,831 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 5403 transitions. [2023-09-01 01:54:29,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 5403 transitions. [2023-09-01 01:54:29,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:54:29,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 5403 transitions. [2023-09-01 01:54:29,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 317.8235294117647) internal successors, (5403), 17 states have internal predecessors, (5403), 0 states have call successors, (0), 0 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 01:54:29,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 822.0) internal successors, (14796), 18 states have internal predecessors, (14796), 0 states have call successors, (0), 0 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 01:54:29,841 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 822.0) internal successors, (14796), 18 states have internal predecessors, (14796), 0 states have call successors, (0), 0 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 01:54:29,841 INFO L175 Difference]: Start difference. First operand has 220 places, 316 transitions, 5984 flow. Second operand 17 states and 5403 transitions. [2023-09-01 01:54:29,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 585 transitions, 11265 flow [2023-09-01 01:54:29,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 585 transitions, 11199 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-09-01 01:54:29,902 INFO L231 Difference]: Finished difference. Result has 234 places, 333 transitions, 6592 flow [2023-09-01 01:54:29,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=5791, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6592, PETRI_PLACES=234, PETRI_TRANSITIONS=333} [2023-09-01 01:54:29,903 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 166 predicate places. [2023-09-01 01:54:29,903 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 333 transitions, 6592 flow [2023-09-01 01:54:29,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 313.25) internal successors, (6265), 20 states have internal predecessors, (6265), 0 states have call successors, (0), 0 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 01:54:29,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:54:29,904 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:54:29,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2023-09-01 01:54:30,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:54:30,105 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:54:30,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:54:30,105 INFO L85 PathProgramCache]: Analyzing trace with hash 755091452, now seen corresponding path program 2 times [2023-09-01 01:54:30,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:54:30,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980100352] [2023-09-01 01:54:30,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:54:30,105 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 01:54:30,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:54:30,106 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:54:30,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2023-09-01 01:54:30,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:54:30,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:54:30,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 01:54:30,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:54:30,323 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:54:30,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:54:30,399 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:54:30,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 01:54:30,477 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:54:30,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 01:54:30,531 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:54:30,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:54:30,568 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-09-01 01:54:30,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:54:30,568 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:54:30,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980100352] [2023-09-01 01:54:30,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980100352] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:54:30,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:54:30,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:54:30,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953956112] [2023-09-01 01:54:30,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:54:30,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:54:30,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:54:30,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:54:30,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:54:31,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 822 [2023-09-01 01:54:31,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 333 transitions, 6592 flow. Second operand has 4 states, 4 states have (on average 332.75) internal successors, (1331), 4 states have internal predecessors, (1331), 0 states have call successors, (0), 0 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 01:54:31,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:54:31,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 822 [2023-09-01 01:54:31,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:54:32,919 INFO L130 PetriNetUnfolder]: 3894/7983 cut-off events. [2023-09-01 01:54:32,919 INFO L131 PetriNetUnfolder]: For 29882/30234 co-relation queries the response was YES. [2023-09-01 01:54:32,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30448 conditions, 7983 events. 3894/7983 cut-off events. For 29882/30234 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 64011 event pairs, 1953 based on Foata normal form. 132/7175 useless extension candidates. Maximal degree in co-relation 30373. Up to 7890 conditions per place. [2023-09-01 01:54:32,969 INFO L137 encePairwiseOnDemand]: 818/822 looper letters, 304 selfloop transitions, 25 changer transitions 0/330 dead transitions. [2023-09-01 01:54:32,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 330 transitions, 7221 flow [2023-09-01 01:54:32,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:54:32,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:54:32,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1351 transitions. [2023-09-01 01:54:32,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41088807785888076 [2023-09-01 01:54:32,971 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1351 transitions. [2023-09-01 01:54:32,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1351 transitions. [2023-09-01 01:54:32,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:54:32,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1351 transitions. [2023-09-01 01:54:32,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 337.75) internal successors, (1351), 4 states have internal predecessors, (1351), 0 states have call successors, (0), 0 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 01:54:32,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 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 01:54:32,974 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 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 01:54:32,974 INFO L175 Difference]: Start difference. First operand has 234 places, 333 transitions, 6592 flow. Second operand 4 states and 1351 transitions. [2023-09-01 01:54:32,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 330 transitions, 7221 flow [2023-09-01 01:54:33,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 330 transitions, 7056 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-09-01 01:54:33,024 INFO L231 Difference]: Finished difference. Result has 226 places, 330 transitions, 6448 flow [2023-09-01 01:54:33,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=6398, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6448, PETRI_PLACES=226, PETRI_TRANSITIONS=330} [2023-09-01 01:54:33,025 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 158 predicate places. [2023-09-01 01:54:33,025 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 330 transitions, 6448 flow [2023-09-01 01:54:33,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 332.75) internal successors, (1331), 4 states have internal predecessors, (1331), 0 states have call successors, (0), 0 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 01:54:33,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:54:33,025 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:54:33,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2023-09-01 01:54:33,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:54:33,229 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:54:33,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:54:33,229 INFO L85 PathProgramCache]: Analyzing trace with hash 755091453, now seen corresponding path program 2 times [2023-09-01 01:54:33,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:54:33,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166487151] [2023-09-01 01:54:33,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:54:33,230 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 01:54:33,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:54:33,231 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:54:33,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2023-09-01 01:54:33,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:54:33,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:54:33,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 01:54:33,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:54:33,505 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2023-09-01 01:54:33,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2023-09-01 01:54:33,616 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:54:33,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:54:33,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:54:33,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 01:54:33,881 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:54:33,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 01:54:33,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:54:33,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 01:54:34,038 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:54:34,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 01:54:34,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:54:34,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 01:54:34,182 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:54:34,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:54:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-09-01 01:54:34,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:54:34,315 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:54:34,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166487151] [2023-09-01 01:54:34,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166487151] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:54:34,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:54:34,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:54:34,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221920207] [2023-09-01 01:54:34,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:54:34,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:54:34,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:54:34,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:54:34,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:54:36,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 822 [2023-09-01 01:54:36,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 330 transitions, 6448 flow. Second operand has 5 states, 5 states have (on average 322.2) internal successors, (1611), 5 states have internal predecessors, (1611), 0 states have call successors, (0), 0 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 01:54:36,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:54:36,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 822 [2023-09-01 01:54:36,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:54:38,490 INFO L130 PetriNetUnfolder]: 3538/7037 cut-off events. [2023-09-01 01:54:38,490 INFO L131 PetriNetUnfolder]: For 28435/28435 co-relation queries the response was YES. [2023-09-01 01:54:38,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27371 conditions, 7037 events. 3538/7037 cut-off events. For 28435/28435 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 53283 event pairs, 1685 based on Foata normal form. 132/6437 useless extension candidates. Maximal degree in co-relation 27296. Up to 7010 conditions per place. [2023-09-01 01:54:38,542 INFO L137 encePairwiseOnDemand]: 818/822 looper letters, 302 selfloop transitions, 25 changer transitions 0/327 dead transitions. [2023-09-01 01:54:38,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 327 transitions, 7073 flow [2023-09-01 01:54:38,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:54:38,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:54:38,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1310 transitions. [2023-09-01 01:54:38,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3984184914841849 [2023-09-01 01:54:38,545 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1310 transitions. [2023-09-01 01:54:38,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1310 transitions. [2023-09-01 01:54:38,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:54:38,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1310 transitions. [2023-09-01 01:54:38,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 327.5) internal successors, (1310), 4 states have internal predecessors, (1310), 0 states have call successors, (0), 0 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 01:54:38,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 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 01:54:38,548 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 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 01:54:38,548 INFO L175 Difference]: Start difference. First operand has 226 places, 330 transitions, 6448 flow. Second operand 4 states and 1310 transitions. [2023-09-01 01:54:38,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 327 transitions, 7073 flow [2023-09-01 01:54:38,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 327 transitions, 7006 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 01:54:38,599 INFO L231 Difference]: Finished difference. Result has 223 places, 327 transitions, 6402 flow [2023-09-01 01:54:38,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=6352, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6402, PETRI_PLACES=223, PETRI_TRANSITIONS=327} [2023-09-01 01:54:38,600 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 155 predicate places. [2023-09-01 01:54:38,600 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 327 transitions, 6402 flow [2023-09-01 01:54:38,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 322.2) internal successors, (1611), 5 states have internal predecessors, (1611), 0 states have call successors, (0), 0 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 01:54:38,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:54:38,601 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 1, 1, 1, 1] [2023-09-01 01:54:38,610 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 (36)] Forceful destruction successful, exit code 0 [2023-09-01 01:54:38,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 01:54:38,807 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-09-01 01:54:38,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:54:38,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1832027010, now seen corresponding path program 2 times [2023-09-01 01:54:38,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:54:38,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220944429] [2023-09-01 01:54:38,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:54:38,808 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 01:54:38,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:54:38,809 INFO L229 MonitoredProcess]: Starting monitored process 37 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 01:54:38,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2023-09-01 01:54:39,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:54:39,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:54:39,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 01:54:39,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:54:39,025 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 8 treesize of output 7 [2023-09-01 01:54:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:54:40,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:54:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:54:49,570 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:54:49,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220944429] [2023-09-01 01:54:49,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220944429] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:54:49,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:54:49,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2023-09-01 01:54:49,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077309355] [2023-09-01 01:54:49,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:54:49,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-09-01 01:54:49,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:54:49,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-09-01 01:54:49,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1122, Unknown=0, NotChecked=0, Total=1560 Killed by 15