./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.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 c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 --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 02:38:47,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:38:47,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:38:47,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:38:47,051 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:38:47,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:38:47,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:38:47,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:38:47,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:38:47,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:38:47,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:38:47,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:38:47,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:38:47,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:38:47,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:38:47,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:38:47,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:38:47,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:38:47,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:38:47,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:38:47,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:38:47,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:38:47,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:38:47,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:38:47,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:38:47,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:38:47,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:38:47,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:38:47,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:38:47,114 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:38:47,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:38:47,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:38:47,118 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:38:47,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:38:47,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:38:47,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:38:47,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:38:47,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:38:47,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:38:47,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:38:47,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:38:47,124 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:38:47,152 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:38:47,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:38:47,154 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:38:47,154 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:38:47,155 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:38:47,155 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:38:47,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:38:47,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:38:47,156 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:38:47,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:38:47,157 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:38:47,157 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:38:47,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:38:47,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:38:47,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:38:47,158 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:38:47,158 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:38:47,159 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:38:47,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:38:47,159 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:38:47,159 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:38:47,159 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:38:47,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:38:47,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:38:47,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:38:47,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:38:47,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:38:47,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:38:47,161 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:38:47,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:38:47,161 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:38:47,161 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:38:47,162 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:38:47,162 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:38:47,162 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:38:47,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:38:47,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:38:47,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:38:47,523 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:38:47,523 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:38:47,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-09-01 02:38:48,716 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:38:48,899 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:38:48,899 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-09-01 02:38:48,905 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c75728b6/9318e0b124184125902f1c67750c796c/FLAG87889bd6b [2023-09-01 02:38:49,294 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c75728b6/9318e0b124184125902f1c67750c796c [2023-09-01 02:38:49,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:38:49,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:38:49,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:38:49,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:38:49,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:38:49,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:38:49" (1/1) ... [2023-09-01 02:38:49,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77ffab76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:49, skipping insertion in model container [2023-09-01 02:38:49,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:38:49" (1/1) ... [2023-09-01 02:38:49,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:38:49,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:38:49,517 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2023-09-01 02:38:49,538 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:38:49,549 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 02:38:49,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7700e184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:49, skipping insertion in model container [2023-09-01 02:38:49,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:38:49,552 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 02:38:49,554 INFO L158 Benchmark]: Toolchain (without parser) took 255.86ms. Allocated memory is still 79.7MB. Free memory was 55.6MB in the beginning and 45.2MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:38:49,555 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 58.7MB. Free memory is still 36.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 02:38:49,555 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.02ms. Allocated memory is still 79.7MB. Free memory was 55.5MB in the beginning and 45.2MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:38:49,557 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 58.7MB. Free memory is still 36.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 254.02ms. Allocated memory is still 79.7MB. Free memory was 55.5MB in the beginning and 45.2MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 159]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.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 c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 --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 02:38:51,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:38:51,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:38:51,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:38:51,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:38:51,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:38:51,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:38:51,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:38:51,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:38:51,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:38:51,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:38:51,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:38:51,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:38:51,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:38:51,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:38:51,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:38:51,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:38:51,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:38:51,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:38:51,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:38:51,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:38:51,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:38:51,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:38:51,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:38:51,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:38:51,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:38:51,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:38:51,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:38:51,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:38:51,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:38:51,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:38:51,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:38:51,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:38:51,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:38:51,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:38:51,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:38:51,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:38:51,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:38:51,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:38:51,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:38:51,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:38:51,383 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 02:38:51,418 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:38:51,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:38:51,420 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:38:51,420 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:38:51,421 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:38:51,421 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:38:51,422 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:38:51,422 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:38:51,422 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:38:51,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:38:51,423 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:38:51,423 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:38:51,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:38:51,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:38:51,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:38:51,424 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:38:51,424 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:38:51,424 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:38:51,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:38:51,425 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:38:51,425 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 02:38:51,425 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 02:38:51,425 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:38:51,426 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:38:51,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:38:51,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:38:51,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:38:51,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:38:51,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:38:51,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:38:51,427 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 02:38:51,427 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 02:38:51,428 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:38:51,428 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:38:51,428 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:38:51,428 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 02:38:51,428 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:38:51,429 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:38:51,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:38:51,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:38:51,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:38:51,777 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:38:51,777 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:38:51,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-09-01 02:38:52,938 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:38:53,129 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:38:53,129 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-09-01 02:38:53,136 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10bb0d91c/8ecea3c600d145239fcc2106a07abad1/FLAGe8d5131be [2023-09-01 02:38:53,147 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10bb0d91c/8ecea3c600d145239fcc2106a07abad1 [2023-09-01 02:38:53,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:38:53,149 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:38:53,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:38:53,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:38:53,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:38:53,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:38:53" (1/1) ... [2023-09-01 02:38:53,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@473ba98d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:53, skipping insertion in model container [2023-09-01 02:38:53,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:38:53" (1/1) ... [2023-09-01 02:38:53,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:38:53,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:38:53,331 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2023-09-01 02:38:53,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:38:53,370 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 02:38:53,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:38:53,409 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2023-09-01 02:38:53,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:38:53,437 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:38:53,490 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2023-09-01 02:38:53,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:38:53,510 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:38:53,510 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:38:53,515 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:38:53,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:53 WrapperNode [2023-09-01 02:38:53,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:38:53,517 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:38:53,517 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:38:53,517 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:38:53,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:53" (1/1) ... [2023-09-01 02:38:53,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:53" (1/1) ... [2023-09-01 02:38:53,592 INFO L138 Inliner]: procedures = 28, calls = 75, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 313 [2023-09-01 02:38:53,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:38:53,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:38:53,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:38:53,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:38:53,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:53" (1/1) ... [2023-09-01 02:38:53,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:53" (1/1) ... [2023-09-01 02:38:53,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:53" (1/1) ... [2023-09-01 02:38:53,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:53" (1/1) ... [2023-09-01 02:38:53,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:53" (1/1) ... [2023-09-01 02:38:53,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:53" (1/1) ... [2023-09-01 02:38:53,656 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:53" (1/1) ... [2023-09-01 02:38:53,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:53" (1/1) ... [2023-09-01 02:38:53,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:38:53,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:38:53,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:38:53,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:38:53,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:53" (1/1) ... [2023-09-01 02:38:53,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:38:53,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:38:53,706 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 02:38:53,729 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 02:38:53,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:38:53,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 02:38:53,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:38:53,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 02:38:53,742 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:38:53,742 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:38:53,742 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:38:53,742 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:38:53,743 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 02:38:53,743 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 02:38:53,743 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 02:38:53,743 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 02:38:53,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:38:53,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:38:53,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 02:38:53,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:38:53,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:38:53,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:38:53,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 02:38:53,747 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 02:38:53,916 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:38:53,930 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:38:54,528 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:38:54,754 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:38:54,754 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 02:38:54,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:38:54 BoogieIcfgContainer [2023-09-01 02:38:54,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:38:54,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:38:54,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:38:54,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:38:54,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:38:53" (1/3) ... [2023-09-01 02:38:54,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c614ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:38:54, skipping insertion in model container [2023-09-01 02:38:54,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:53" (2/3) ... [2023-09-01 02:38:54,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c614ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:38:54, skipping insertion in model container [2023-09-01 02:38:54,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:38:54" (3/3) ... [2023-09-01 02:38:54,766 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2023-09-01 02:38:54,783 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:38:54,784 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-09-01 02:38:54,784 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:38:54,889 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 02:38:54,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 258 transitions, 548 flow [2023-09-01 02:38:55,051 INFO L130 PetriNetUnfolder]: 19/254 cut-off events. [2023-09-01 02:38:55,052 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 02:38:55,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 254 events. 19/254 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 219 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 204. Up to 2 conditions per place. [2023-09-01 02:38:55,059 INFO L82 GeneralOperation]: Start removeDead. Operand has 252 places, 258 transitions, 548 flow [2023-09-01 02:38:55,068 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 250 transitions, 524 flow [2023-09-01 02:38:55,082 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:38:55,090 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 244 places, 250 transitions, 524 flow [2023-09-01 02:38:55,094 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 244 places, 250 transitions, 524 flow [2023-09-01 02:38:55,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 250 transitions, 524 flow [2023-09-01 02:38:55,156 INFO L130 PetriNetUnfolder]: 19/250 cut-off events. [2023-09-01 02:38:55,157 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 02:38:55,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 250 events. 19/250 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 218 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 204. Up to 2 conditions per place. [2023-09-01 02:38:55,162 INFO L119 LiptonReduction]: Number of co-enabled transitions 3160 [2023-09-01 02:39:22,353 INFO L134 LiptonReduction]: Checked pairs total: 5485 [2023-09-01 02:39:22,353 INFO L136 LiptonReduction]: Total number of compositions: 264 [2023-09-01 02:39:22,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:39:22,370 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;@29ecf5d3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:39:22,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2023-09-01 02:39:22,373 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 02:39:22,373 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:39:22,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:22,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:39:22,374 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:39:22,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:22,378 INFO L85 PathProgramCache]: Analyzing trace with hash 38083, now seen corresponding path program 1 times [2023-09-01 02:39:22,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:22,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301345828] [2023-09-01 02:39:22,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:22,389 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 02:39:22,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:22,396 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 02:39:22,397 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 02:39:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:22,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:39:22,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:22,815 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 02:39:22,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 02:39:22,859 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 02:39:22,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:39:22,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:22,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301345828] [2023-09-01 02:39:22,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301345828] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:39:22,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:39:22,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:39:22,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663711428] [2023-09-01 02:39:22,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:39:22,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:39:22,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:22,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:39:22,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:39:23,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 522 [2023-09-01 02:39:23,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:23,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:39:23,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 522 [2023-09-01 02:39:23,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:27,922 INFO L130 PetriNetUnfolder]: 31228/39023 cut-off events. [2023-09-01 02:39:27,923 INFO L131 PetriNetUnfolder]: For 324/324 co-relation queries the response was YES. [2023-09-01 02:39:28,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78387 conditions, 39023 events. 31228/39023 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 2686. Compared 207777 event pairs, 20215 based on Foata normal form. 0/10691 useless extension candidates. Maximal degree in co-relation 34221. Up to 19215 conditions per place. [2023-09-01 02:39:28,254 INFO L137 encePairwiseOnDemand]: 515/522 looper letters, 107 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2023-09-01 02:39:28,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 117 transitions, 504 flow [2023-09-01 02:39:28,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:39:28,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:39:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 751 transitions. [2023-09-01 02:39:28,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47956577266922096 [2023-09-01 02:39:28,280 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 751 transitions. [2023-09-01 02:39:28,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 751 transitions. [2023-09-01 02:39:28,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:28,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 751 transitions. [2023-09-01 02:39:28,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:28,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:28,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:28,305 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 152 flow. Second operand 3 states and 751 transitions. [2023-09-01 02:39:28,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 117 transitions, 504 flow [2023-09-01 02:39:28,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 117 transitions, 472 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-09-01 02:39:28,351 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 166 flow [2023-09-01 02:39:28,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2023-09-01 02:39:28,359 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -5 predicate places. [2023-09-01 02:39:28,359 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 166 flow [2023-09-01 02:39:28,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:28,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:28,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:39:28,377 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 02:39:28,569 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 02:39:28,570 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:39:28,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:28,571 INFO L85 PathProgramCache]: Analyzing trace with hash 38082, now seen corresponding path program 1 times [2023-09-01 02:39:28,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:28,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579871659] [2023-09-01 02:39:28,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:28,572 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 02:39:28,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:28,574 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 02:39:28,577 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 02:39:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:28,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:39:28,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:28,767 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-09-01 02:39:28,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-09-01 02:39:28,796 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 02:39:28,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:39:28,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:28,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579871659] [2023-09-01 02:39:28,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579871659] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:39:28,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:39:28,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:39:28,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195462966] [2023-09-01 02:39:28,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:39:28,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:39:28,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:28,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:39:28,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:39:28,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 522 [2023-09-01 02:39:28,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:28,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:39:28,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 522 [2023-09-01 02:39:28,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:31,811 INFO L130 PetriNetUnfolder]: 31233/39019 cut-off events. [2023-09-01 02:39:31,811 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:39:31,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77777 conditions, 39019 events. 31233/39019 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2686. Compared 208324 event pairs, 20218 based on Foata normal form. 2/10239 useless extension candidates. Maximal degree in co-relation 38877. Up to 38429 conditions per place. [2023-09-01 02:39:32,100 INFO L137 encePairwiseOnDemand]: 519/522 looper letters, 57 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-09-01 02:39:32,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 64 transitions, 278 flow [2023-09-01 02:39:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:39:32,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:39:32,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 693 transitions. [2023-09-01 02:39:32,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425287356321839 [2023-09-01 02:39:32,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 693 transitions. [2023-09-01 02:39:32,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 693 transitions. [2023-09-01 02:39:32,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:32,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 693 transitions. [2023-09-01 02:39:32,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:32,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:32,110 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:32,110 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 166 flow. Second operand 3 states and 693 transitions. [2023-09-01 02:39:32,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 64 transitions, 278 flow [2023-09-01 02:39:32,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 64 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:39:32,114 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 156 flow [2023-09-01 02:39:32,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=62, 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=64, PETRI_TRANSITIONS=64} [2023-09-01 02:39:32,115 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-09-01 02:39:32,116 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 156 flow [2023-09-01 02:39:32,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:32,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:32,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:39:32,129 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 (3)] Forceful destruction successful, exit code 0 [2023-09-01 02:39:32,326 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 02:39:32,327 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:39:32,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:32,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1184525, now seen corresponding path program 1 times [2023-09-01 02:39:32,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:32,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044371816] [2023-09-01 02:39:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:32,328 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 02:39:32,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:32,332 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 02:39:32,334 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 02:39:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:32,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:39:32,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:32,560 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 02:39:32,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 02:39:32,619 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 02:39:32,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:39:32,782 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 02:39:32,782 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:32,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044371816] [2023-09-01 02:39:32,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044371816] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:39:32,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:39:32,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 02:39:32,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181904886] [2023-09-01 02:39:32,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:39:32,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:39:32,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:32,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:39:32,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:39:33,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 522 [2023-09-01 02:39:33,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 203.0) internal successors, (1218), 6 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:33,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:39:33,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 522 [2023-09-01 02:39:33,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:38,953 INFO L130 PetriNetUnfolder]: 46847/58539 cut-off events. [2023-09-01 02:39:38,954 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:39:39,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116662 conditions, 58539 events. 46847/58539 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3684. Compared 321685 event pairs, 30321 based on Foata normal form. 0/16274 useless extension candidates. Maximal degree in co-relation 116654. Up to 19216 conditions per place. [2023-09-01 02:39:39,298 INFO L137 encePairwiseOnDemand]: 513/522 looper letters, 152 selfloop transitions, 19 changer transitions 0/177 dead transitions. [2023-09-01 02:39:39,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 177 transitions, 758 flow [2023-09-01 02:39:39,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:39:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:39:39,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1389 transitions. [2023-09-01 02:39:39,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434865900383142 [2023-09-01 02:39:39,302 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1389 transitions. [2023-09-01 02:39:39,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1389 transitions. [2023-09-01 02:39:39,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:39,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1389 transitions. [2023-09-01 02:39:39,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 231.5) internal successors, (1389), 6 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:39,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 522.0) internal successors, (3654), 7 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:39,313 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 522.0) internal successors, (3654), 7 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:39,313 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 156 flow. Second operand 6 states and 1389 transitions. [2023-09-01 02:39:39,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 177 transitions, 758 flow [2023-09-01 02:39:39,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 177 transitions, 757 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:39:39,317 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 300 flow [2023-09-01 02:39:39,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=300, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2023-09-01 02:39:39,318 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 1 predicate places. [2023-09-01 02:39:39,318 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 300 flow [2023-09-01 02:39:39,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 203.0) internal successors, (1218), 6 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:39,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:39,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:39:39,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-09-01 02:39:39,524 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 02:39:39,524 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:39:39,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:39,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1185598, now seen corresponding path program 1 times [2023-09-01 02:39:39,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:39,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258246556] [2023-09-01 02:39:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:39,525 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 02:39:39,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:39,526 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 02:39:39,527 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 02:39:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:39,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 02:39:39,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:39,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:39,783 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2023-09-01 02:39:39,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2023-09-01 02:39:40,302 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-09-01 02:39:40,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2023-09-01 02:39:40,369 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 02:39:40,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:39:40,369 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:40,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258246556] [2023-09-01 02:39:40,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258246556] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:39:40,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:39:40,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:39:40,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581889251] [2023-09-01 02:39:40,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:39:40,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:39:40,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:40,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:39:40,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:39:40,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 522 [2023-09-01 02:39:40,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:40,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:39:40,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 522 [2023-09-01 02:39:40,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:44,287 INFO L130 PetriNetUnfolder]: 37855/47659 cut-off events. [2023-09-01 02:39:44,287 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 02:39:44,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94979 conditions, 47659 events. 37855/47659 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3006. Compared 264540 event pairs, 24327 based on Foata normal form. 0/13489 useless extension candidates. Maximal degree in co-relation 94966. Up to 46774 conditions per place. [2023-09-01 02:39:44,602 INFO L137 encePairwiseOnDemand]: 519/522 looper letters, 68 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2023-09-01 02:39:44,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 75 transitions, 418 flow [2023-09-01 02:39:44,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:39:44,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:39:44,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 700 transitions. [2023-09-01 02:39:44,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44699872286079184 [2023-09-01 02:39:44,605 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 700 transitions. [2023-09-01 02:39:44,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 700 transitions. [2023-09-01 02:39:44,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:44,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 700 transitions. [2023-09-01 02:39:44,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:44,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:44,611 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:44,611 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 300 flow. Second operand 3 states and 700 transitions. [2023-09-01 02:39:44,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 75 transitions, 418 flow [2023-09-01 02:39:44,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 75 transitions, 399 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 02:39:44,617 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 263 flow [2023-09-01 02:39:44,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2023-09-01 02:39:44,619 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 0 predicate places. [2023-09-01 02:39:44,619 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 263 flow [2023-09-01 02:39:44,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:44,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:44,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:39:44,637 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 02:39:44,829 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 02:39:44,829 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:39:44,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:44,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1185597, now seen corresponding path program 1 times [2023-09-01 02:39:44,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:44,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922299107] [2023-09-01 02:39:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:44,830 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 02:39:44,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:44,831 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 02:39:44,833 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 02:39:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:44,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 02:39:44,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:44,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:44,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:44,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:44,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:44,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:44,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:44,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:45,064 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-09-01 02:39:45,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2023-09-01 02:39:45,095 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-09-01 02:39:45,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2023-09-01 02:39:45,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:45,137 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 02:39:45,159 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 02:39:45,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:39:45,159 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:45,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922299107] [2023-09-01 02:39:45,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922299107] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:39:45,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:39:45,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:39:45,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832380010] [2023-09-01 02:39:45,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:39:45,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:39:45,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:45,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:39:45,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:39:45,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 522 [2023-09-01 02:39:45,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 263 flow. Second operand has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:45,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:39:45,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 522 [2023-09-01 02:39:45,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:48,423 INFO L130 PetriNetUnfolder]: 28853/36779 cut-off events. [2023-09-01 02:39:48,423 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 02:39:48,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73200 conditions, 36779 events. 28853/36779 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2154. Compared 204744 event pairs, 18327 based on Foata normal form. 0/11614 useless extension candidates. Maximal degree in co-relation 73186. Up to 35894 conditions per place. [2023-09-01 02:39:48,690 INFO L137 encePairwiseOnDemand]: 519/522 looper letters, 64 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-09-01 02:39:48,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 71 transitions, 373 flow [2023-09-01 02:39:48,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:39:48,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:39:48,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 704 transitions. [2023-09-01 02:39:48,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495530012771392 [2023-09-01 02:39:48,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 704 transitions. [2023-09-01 02:39:48,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 704 transitions. [2023-09-01 02:39:48,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:48,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 704 transitions. [2023-09-01 02:39:48,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:48,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:48,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:48,704 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 263 flow. Second operand 3 states and 704 transitions. [2023-09-01 02:39:48,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 71 transitions, 373 flow [2023-09-01 02:39:48,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:39:48,706 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 244 flow [2023-09-01 02:39:48,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2023-09-01 02:39:48,709 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2023-09-01 02:39:48,709 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 244 flow [2023-09-01 02:39:48,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:48,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:48,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:39:48,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 02:39:48,920 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 02:39:48,921 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:39:48,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:48,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1139386454, now seen corresponding path program 1 times [2023-09-01 02:39:48,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:48,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051381228] [2023-09-01 02:39:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:48,921 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 02:39:48,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:48,922 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 02:39:48,923 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 02:39:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:49,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:39:49,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:49,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:49,131 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2023-09-01 02:39:49,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2023-09-01 02:39:49,676 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-09-01 02:39:49,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-09-01 02:39:49,837 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 02:39:49,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:39:49,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:49,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051381228] [2023-09-01 02:39:49,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051381228] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:39:49,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:39:49,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:39:49,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977220717] [2023-09-01 02:39:49,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:39:49,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:39:49,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:49,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:39:49,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:39:50,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 522 [2023-09-01 02:39:50,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:50,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:39:50,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 522 [2023-09-01 02:39:50,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:53,062 INFO L130 PetriNetUnfolder]: 27632/35168 cut-off events. [2023-09-01 02:39:53,062 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 02:39:53,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69979 conditions, 35168 events. 27632/35168 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2046. Compared 193778 event pairs, 17418 based on Foata normal form. 0/11311 useless extension candidates. Maximal degree in co-relation 69964. Up to 34283 conditions per place. [2023-09-01 02:39:53,245 INFO L137 encePairwiseOnDemand]: 519/522 looper letters, 62 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-09-01 02:39:53,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 366 flow [2023-09-01 02:39:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:39:53,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:39:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 696 transitions. [2023-09-01 02:39:53,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-09-01 02:39:53,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 696 transitions. [2023-09-01 02:39:53,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 696 transitions. [2023-09-01 02:39:53,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:53,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 696 transitions. [2023-09-01 02:39:53,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:53,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:53,253 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:53,253 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 244 flow. Second operand 3 states and 696 transitions. [2023-09-01 02:39:53,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 366 flow [2023-09-01 02:39:53,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:39:53,255 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 241 flow [2023-09-01 02:39:53,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2023-09-01 02:39:53,256 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-09-01 02:39:53,256 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 241 flow [2023-09-01 02:39:53,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:53,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:53,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:39:53,271 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 02:39:53,466 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 02:39:53,467 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:39:53,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:53,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1139386455, now seen corresponding path program 1 times [2023-09-01 02:39:53,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:53,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451479400] [2023-09-01 02:39:53,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:53,468 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 02:39:53,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:53,469 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 02:39:53,470 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 02:39:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:53,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 02:39:53,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:53,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:53,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:53,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:53,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:53,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:53,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:53,710 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-09-01 02:39:53,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2023-09-01 02:39:53,744 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 02:39:53,744 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 31 treesize of output 27 [2023-09-01 02:39:53,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:53,801 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 02:39:53,857 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 02:39:53,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:39:53,857 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:53,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451479400] [2023-09-01 02:39:53,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451479400] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:39:53,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:39:53,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:39:53,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344261880] [2023-09-01 02:39:53,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:39:53,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:39:53,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:53,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:39:53,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:39:54,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 522 [2023-09-01 02:39:54,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 218.25) internal successors, (873), 4 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:54,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:39:54,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 522 [2023-09-01 02:39:54,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:56,778 INFO L130 PetriNetUnfolder]: 26411/33557 cut-off events. [2023-09-01 02:39:56,779 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 02:39:56,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66758 conditions, 33557 events. 26411/33557 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 1961. Compared 183481 event pairs, 16509 based on Foata normal form. 0/11008 useless extension candidates. Maximal degree in co-relation 66742. Up to 32672 conditions per place. [2023-09-01 02:39:56,984 INFO L137 encePairwiseOnDemand]: 519/522 looper letters, 60 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-09-01 02:39:56,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 67 transitions, 359 flow [2023-09-01 02:39:56,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:39:56,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:39:56,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 700 transitions. [2023-09-01 02:39:56,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44699872286079184 [2023-09-01 02:39:56,986 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 700 transitions. [2023-09-01 02:39:56,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 700 transitions. [2023-09-01 02:39:56,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:56,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 700 transitions. [2023-09-01 02:39:56,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:56,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:56,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:56,991 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 241 flow. Second operand 3 states and 700 transitions. [2023-09-01 02:39:56,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 67 transitions, 359 flow [2023-09-01 02:39:56,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 67 transitions, 358 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:39:56,994 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 238 flow [2023-09-01 02:39:56,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2023-09-01 02:39:56,995 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-09-01 02:39:56,995 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 238 flow [2023-09-01 02:39:56,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 218.25) internal successors, (873), 4 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:56,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:56,996 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 02:39:57,009 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 02:39:57,205 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 02:39:57,205 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:39:57,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:57,206 INFO L85 PathProgramCache]: Analyzing trace with hash 932370243, now seen corresponding path program 2 times [2023-09-01 02:39:57,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:57,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538965308] [2023-09-01 02:39:57,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:39:57,206 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 02:39:57,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:57,208 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 02:39:57,210 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 02:39:57,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:39:57,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:39:57,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:39:57,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:57,440 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 02:39:57,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 02:39:57,563 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 02:39:57,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:39:58,195 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 02:39:58,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:58,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538965308] [2023-09-01 02:39:58,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538965308] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:39:58,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:39:58,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:39:58,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096323113] [2023-09-01 02:39:58,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:39:58,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:39:58,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:58,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:39:58,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:40:02,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 522 [2023-09-01 02:40:02,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 238 flow. Second operand has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:02,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:40:02,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 522 [2023-09-01 02:40:02,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:40:05,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:06,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:08,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:10,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:11,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:13,567 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 02:40:25,798 INFO L130 PetriNetUnfolder]: 87978/111827 cut-off events. [2023-09-01 02:40:25,799 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-09-01 02:40:26,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222275 conditions, 111827 events. 87978/111827 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 4455. Compared 666746 event pairs, 55003 based on Foata normal form. 12/38526 useless extension candidates. Maximal degree in co-relation 222258. Up to 10896 conditions per place. [2023-09-01 02:40:26,488 INFO L137 encePairwiseOnDemand]: 515/522 looper letters, 415 selfloop transitions, 32 changer transitions 0/453 dead transitions. [2023-09-01 02:40:26,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 453 transitions, 2080 flow [2023-09-01 02:40:26,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 02:40:26,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 02:40:26,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2907 transitions. [2023-09-01 02:40:26,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4640804597701149 [2023-09-01 02:40:26,497 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2907 transitions. [2023-09-01 02:40:26,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2907 transitions. [2023-09-01 02:40:26,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:40:26,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2907 transitions. [2023-09-01 02:40:26,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 242.25) internal successors, (2907), 12 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:26,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 522.0) internal successors, (6786), 13 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:26,513 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 522.0) internal successors, (6786), 13 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:26,513 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 238 flow. Second operand 12 states and 2907 transitions. [2023-09-01 02:40:26,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 453 transitions, 2080 flow [2023-09-01 02:40:26,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 453 transitions, 2079 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:40:26,520 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 481 flow [2023-09-01 02:40:26,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=481, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2023-09-01 02:40:26,520 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 14 predicate places. [2023-09-01 02:40:26,521 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 481 flow [2023-09-01 02:40:26,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:26,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:40:26,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:40:26,534 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 02:40:26,731 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 02:40:26,731 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:40:26,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:40:26,732 INFO L85 PathProgramCache]: Analyzing trace with hash 961234650, now seen corresponding path program 1 times [2023-09-01 02:40:26,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:40:26,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426886736] [2023-09-01 02:40:26,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:40:26,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:40:26,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:40:26,733 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 02:40:26,734 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 02:40:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:40:26,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:40:26,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:40:26,874 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 02:40:26,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:40:26,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:40:26,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426886736] [2023-09-01 02:40:26,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426886736] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:40:26,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:40:26,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:40:26,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359413435] [2023-09-01 02:40:26,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:40:26,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:40:26,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:40:26,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:40:26,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:40:26,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 522 [2023-09-01 02:40:26,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 481 flow. Second operand has 4 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:26,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:40:26,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 522 [2023-09-01 02:40:26,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:40:37,571 INFO L130 PetriNetUnfolder]: 100374/129400 cut-off events. [2023-09-01 02:40:37,572 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-09-01 02:40:38,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257388 conditions, 129400 events. 100374/129400 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 5120. Compared 816741 event pairs, 63900 based on Foata normal form. 0/47789 useless extension candidates. Maximal degree in co-relation 257363. Up to 108766 conditions per place. [2023-09-01 02:40:38,545 INFO L137 encePairwiseOnDemand]: 513/522 looper letters, 127 selfloop transitions, 3 changer transitions 0/136 dead transitions. [2023-09-01 02:40:38,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 136 transitions, 970 flow [2023-09-01 02:40:38,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:40:38,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:40:38,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 948 transitions. [2023-09-01 02:40:38,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4540229885057471 [2023-09-01 02:40:38,548 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 948 transitions. [2023-09-01 02:40:38,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 948 transitions. [2023-09-01 02:40:38,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:40:38,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 948 transitions. [2023-09-01 02:40:38,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:38,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 522.0) internal successors, (2610), 5 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:38,553 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 522.0) internal successors, (2610), 5 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:38,554 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 481 flow. Second operand 4 states and 948 transitions. [2023-09-01 02:40:38,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 136 transitions, 970 flow [2023-09-01 02:40:38,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 136 transitions, 887 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-09-01 02:40:38,559 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 441 flow [2023-09-01 02:40:38,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=441, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2023-09-01 02:40:38,560 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 14 predicate places. [2023-09-01 02:40:38,560 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 441 flow [2023-09-01 02:40:38,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:38,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:40:38,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:40:38,575 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 02:40:38,769 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 02:40:38,770 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:40:38,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:40:38,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1132425180, now seen corresponding path program 1 times [2023-09-01 02:40:38,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:40:38,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8063831] [2023-09-01 02:40:38,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:40:38,771 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 02:40:38,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:40:38,772 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 02:40:38,773 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 02:40:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:40:38,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 02:40:38,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:40:39,024 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 02:40:39,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 02:40:39,165 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-09-01 02:40:39,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-09-01 02:40:39,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:40:39,307 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 02:40:39,316 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:40:39,316 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 02:40:39,371 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 02:40:39,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:40:40,854 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 02:40:40,854 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:40:40,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8063831] [2023-09-01 02:40:40,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8063831] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:40:40,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:40:40,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 02:40:40,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927528205] [2023-09-01 02:40:40,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:40:40,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:40:40,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:40:40,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:40:40,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:40:50,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 522 [2023-09-01 02:40:50,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 441 flow. Second operand has 8 states, 8 states have (on average 193.5) internal successors, (1548), 8 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:50,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:40:50,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 522 [2023-09-01 02:40:50,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:40:55,981 WARN L222 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:40:57,110 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 02:41:37,481 INFO L130 PetriNetUnfolder]: 213466/274752 cut-off events. [2023-09-01 02:41:37,482 INFO L131 PetriNetUnfolder]: For 30090/30090 co-relation queries the response was YES. [2023-09-01 02:41:38,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619046 conditions, 274752 events. 213466/274752 cut-off events. For 30090/30090 co-relation queries the response was YES. Maximal size of possible extension queue 10431. Compared 1850372 event pairs, 134750 based on Foata normal form. 0/134680 useless extension candidates. Maximal degree in co-relation 619019. Up to 108731 conditions per place. [2023-09-01 02:41:39,740 INFO L137 encePairwiseOnDemand]: 513/522 looper letters, 235 selfloop transitions, 31 changer transitions 0/272 dead transitions. [2023-09-01 02:41:39,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 272 transitions, 1619 flow [2023-09-01 02:41:39,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 02:41:39,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 02:41:39,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3103 transitions. [2023-09-01 02:41:39,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3962962962962963 [2023-09-01 02:41:39,903 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3103 transitions. [2023-09-01 02:41:39,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3103 transitions. [2023-09-01 02:41:39,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:41:39,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3103 transitions. [2023-09-01 02:41:39,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 206.86666666666667) internal successors, (3103), 15 states have internal predecessors, (3103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:39,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 522.0) internal successors, (8352), 16 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:39,932 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 522.0) internal successors, (8352), 16 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:39,932 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 441 flow. Second operand 15 states and 3103 transitions. [2023-09-01 02:41:39,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 272 transitions, 1619 flow [2023-09-01 02:41:39,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 272 transitions, 1613 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 02:41:39,951 INFO L231 Difference]: Finished difference. Result has 104 places, 104 transitions, 689 flow [2023-09-01 02:41:39,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=689, PETRI_PLACES=104, PETRI_TRANSITIONS=104} [2023-09-01 02:41:39,953 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 33 predicate places. [2023-09-01 02:41:39,953 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 104 transitions, 689 flow [2023-09-01 02:41:39,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.5) internal successors, (1548), 8 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:39,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:41:39,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:41:39,963 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 02:41:40,160 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 02:41:40,161 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:41:40,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:41:40,161 INFO L85 PathProgramCache]: Analyzing trace with hash -266250333, now seen corresponding path program 1 times [2023-09-01 02:41:40,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:41:40,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312802584] [2023-09-01 02:41:40,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:41:40,162 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 02:41:40,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:41:40,163 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 02:41:40,164 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 02:41:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:41:40,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 02:41:40,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:41:40,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:41:40,370 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2023-09-01 02:41:40,371 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 5 case distinctions, treesize of input 36 treesize of output 63 [2023-09-01 02:41:40,451 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:41:40,452 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 02:41:40,512 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 02:41:40,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:41:40,513 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:41:40,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312802584] [2023-09-01 02:41:40,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312802584] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:41:40,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:41:40,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:41:40,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96649079] [2023-09-01 02:41:40,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:41:40,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:41:40,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:41:40,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:41:40,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:41:40,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 522 [2023-09-01 02:41:40,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 104 transitions, 689 flow. Second operand has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:40,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:41:40,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 522 [2023-09-01 02:41:40,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:42:05,707 INFO L130 PetriNetUnfolder]: 210246/269886 cut-off events. [2023-09-01 02:42:05,707 INFO L131 PetriNetUnfolder]: For 142061/142061 co-relation queries the response was YES. [2023-09-01 02:42:07,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 643099 conditions, 269886 events. 210246/269886 cut-off events. For 142061/142061 co-relation queries the response was YES. Maximal size of possible extension queue 10369. Compared 1818587 event pairs, 132630 based on Foata normal form. 0/137256 useless extension candidates. Maximal degree in co-relation 643065. Up to 262506 conditions per place. [2023-09-01 02:42:08,287 INFO L137 encePairwiseOnDemand]: 519/522 looper letters, 95 selfloop transitions, 1 changer transitions 0/102 dead transitions. [2023-09-01 02:42:08,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 102 transitions, 877 flow [2023-09-01 02:42:08,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:42:08,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:42:08,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 692 transitions. [2023-09-01 02:42:08,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44189016602809705 [2023-09-01 02:42:08,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 692 transitions. [2023-09-01 02:42:08,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 692 transitions. [2023-09-01 02:42:08,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:42:08,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 692 transitions. [2023-09-01 02:42:08,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:08,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:08,294 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:08,294 INFO L175 Difference]: Start difference. First operand has 104 places, 104 transitions, 689 flow. Second operand 3 states and 692 transitions. [2023-09-01 02:42:08,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 102 transitions, 877 flow [2023-09-01 02:42:08,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 102 transitions, 856 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 02:42:08,452 INFO L231 Difference]: Finished difference. Result has 103 places, 102 transitions, 666 flow [2023-09-01 02:42:08,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=666, PETRI_PLACES=103, PETRI_TRANSITIONS=102} [2023-09-01 02:42:08,452 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 32 predicate places. [2023-09-01 02:42:08,453 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 102 transitions, 666 flow [2023-09-01 02:42:08,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:08,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:42:08,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:42:08,460 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 02:42:08,653 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 02:42:08,654 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:42:08,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:42:08,654 INFO L85 PathProgramCache]: Analyzing trace with hash -266250332, now seen corresponding path program 1 times [2023-09-01 02:42:08,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:42:08,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428753575] [2023-09-01 02:42:08,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:42:08,655 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 02:42:08,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:42:08,656 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 02:42:08,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 02:42:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:42:08,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 02:42:08,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:42:08,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:42:08,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:42:08,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:42:08,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:42:08,946 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 02:42:08,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2023-09-01 02:42:08,978 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 18 treesize of output 16 [2023-09-01 02:42:09,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:42:09,043 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 02:42:09,137 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 02:42:09,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:42:09,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:42:09,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428753575] [2023-09-01 02:42:09,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428753575] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:42:09,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:42:09,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:42:09,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853159593] [2023-09-01 02:42:09,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:42:09,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:42:09,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:42:09,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:42:09,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:42:09,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 522 [2023-09-01 02:42:09,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 102 transitions, 666 flow. Second operand has 4 states, 4 states have (on average 218.75) internal successors, (875), 4 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:09,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:42:09,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 522 [2023-09-01 02:42:09,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand