./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-ring.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-ring.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 e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --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 02:46:41,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:46:41,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:46:41,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:46:41,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:46:41,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:46:41,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:46:41,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:46:41,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:46:41,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:46:41,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:46:41,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:46:41,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:46:41,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:46:41,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:46:41,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:46:41,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:46:41,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:46:41,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:46:41,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:46:41,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:46:41,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:46:41,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:46:41,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:46:41,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:46:41,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:46:41,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:46:41,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:46:41,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:46:41,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:46:41,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:46:41,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:46:41,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:46:41,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:46:41,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:46:41,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:46:41,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:46:41,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:46:41,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:46:41,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:46:41,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:46:41,572 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:46:41,610 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:46:41,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:46:41,612 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:46:41,613 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:46:41,613 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:46:41,614 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:46:41,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:46:41,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:46:41,614 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:46:41,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:46:41,615 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:46:41,616 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:46:41,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:46:41,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:46:41,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:46:41,616 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:46:41,617 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:46:41,617 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:46:41,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:46:41,617 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:46:41,617 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:46:41,618 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:46:41,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:46:41,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:46:41,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:46:41,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:46:41,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:46:41,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:46:41,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:46:41,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:46:41,619 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:46:41,620 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:46:41,620 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:46:41,620 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:46:41,620 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:46:41,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:46:41,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:46:41,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:46:41,981 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:46:41,982 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:46:41,983 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-09-01 02:46:43,068 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:46:43,275 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:46:43,275 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-09-01 02:46:43,281 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42c972ffc/b6296c9d40ba49f9ae8158eea87317aa/FLAGc982534a6 [2023-09-01 02:46:43,298 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42c972ffc/b6296c9d40ba49f9ae8158eea87317aa [2023-09-01 02:46:43,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:46:43,302 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:46:43,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:46:43,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:46:43,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:46:43,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:46:43" (1/1) ... [2023-09-01 02:46:43,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cdb577a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:46:43, skipping insertion in model container [2023-09-01 02:46:43,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:46:43" (1/1) ... [2023-09-01 02:46:43,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:46:43,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:46:43,545 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-ring.wvr.c[3947,3960] [2023-09-01 02:46:43,558 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:46:43,572 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 02:46:43,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@67965845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:46:43, skipping insertion in model container [2023-09-01 02:46:43,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:46:43,575 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 02:46:43,577 INFO L158 Benchmark]: Toolchain (without parser) took 273.92ms. Allocated memory is still 88.1MB. Free memory was 65.6MB in the beginning and 55.5MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 02:46:43,578 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory is still 38.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 02:46:43,578 INFO L158 Benchmark]: CACSL2BoogieTranslator took 270.18ms. Allocated memory is still 88.1MB. Free memory was 65.6MB in the beginning and 55.5MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 02:46:43,580 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 60.8MB. Free memory is still 38.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 270.18ms. Allocated memory is still 88.1MB. Free memory was 65.6MB in the beginning and 55.5MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. 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-ring.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 e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --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 02:46:45,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:46:45,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:46:45,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:46:45,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:46:45,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:46:45,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:46:45,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:46:45,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:46:45,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:46:45,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:46:45,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:46:45,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:46:45,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:46:45,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:46:45,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:46:45,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:46:45,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:46:45,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:46:45,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:46:45,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:46:45,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:46:45,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:46:45,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:46:45,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:46:45,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:46:45,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:46:45,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:46:45,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:46:45,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:46:45,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:46:45,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:46:45,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:46:45,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:46:45,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:46:45,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:46:45,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:46:45,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:46:45,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:46:45,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:46:45,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:46:45,380 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 02:46:45,410 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:46:45,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:46:45,411 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:46:45,411 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:46:45,412 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:46:45,412 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:46:45,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:46:45,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:46:45,413 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:46:45,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:46:45,414 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:46:45,414 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:46:45,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:46:45,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:46:45,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:46:45,415 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:46:45,415 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:46:45,416 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:46:45,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:46:45,416 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:46:45,416 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 02:46:45,416 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 02:46:45,416 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:46:45,417 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:46:45,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:46:45,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:46:45,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:46:45,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:46:45,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:46:45,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:46:45,418 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 02:46:45,418 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 02:46:45,419 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:46:45,419 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:46:45,419 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:46:45,419 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 02:46:45,419 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:46:45,419 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:46:45,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:46:45,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:46:45,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:46:45,746 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:46:45,747 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:46:45,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-09-01 02:46:46,849 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:46:47,084 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:46:47,084 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-09-01 02:46:47,090 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db06608dd/9dbdcaec3b044187ab671d193ddad866/FLAG1278851c8 [2023-09-01 02:46:47,108 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db06608dd/9dbdcaec3b044187ab671d193ddad866 [2023-09-01 02:46:47,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:46:47,112 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:46:47,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:46:47,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:46:47,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:46:47,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:46:47" (1/1) ... [2023-09-01 02:46:47,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@adf2197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:46:47, skipping insertion in model container [2023-09-01 02:46:47,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:46:47" (1/1) ... [2023-09-01 02:46:47,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:46:47,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:46:47,273 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-ring.wvr.c[3947,3960] [2023-09-01 02:46:47,281 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:46:47,292 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 02:46:47,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:46:47,313 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-ring.wvr.c[3947,3960] [2023-09-01 02:46:47,316 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:46:47,320 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:46:47,342 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-ring.wvr.c[3947,3960] [2023-09-01 02:46:47,345 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:46:47,353 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:46:47,353 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:46:47,360 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:46:47,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:46:47 WrapperNode [2023-09-01 02:46:47,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:46:47,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:46:47,362 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:46:47,362 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:46:47,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:46:47" (1/1) ... [2023-09-01 02:46:47,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:46:47" (1/1) ... [2023-09-01 02:46:47,457 INFO L138 Inliner]: procedures = 27, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 315 [2023-09-01 02:46:47,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:46:47,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:46:47,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:46:47,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:46:47,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:46:47" (1/1) ... [2023-09-01 02:46:47,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:46:47" (1/1) ... [2023-09-01 02:46:47,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:46:47" (1/1) ... [2023-09-01 02:46:47,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:46:47" (1/1) ... [2023-09-01 02:46:47,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:46:47" (1/1) ... [2023-09-01 02:46:47,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:46:47" (1/1) ... [2023-09-01 02:46:47,513 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:46:47" (1/1) ... [2023-09-01 02:46:47,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:46:47" (1/1) ... [2023-09-01 02:46:47,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:46:47,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:46:47,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:46:47,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:46:47,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:46:47" (1/1) ... [2023-09-01 02:46:47,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:46:47,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:46:47,562 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 02:46:47,569 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 02:46:47,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:46:47,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 02:46:47,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:46:47,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 02:46:47,598 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:46:47,598 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:46:47,598 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:46:47,599 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:46:47,599 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 02:46:47,599 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 02:46:47,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:46:47,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:46:47,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 02:46:47,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:46:47,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:46:47,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:46:47,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 02:46:47,602 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 02:46:47,749 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:46:47,751 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:46:48,440 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:46:48,626 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:46:48,626 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 02:46:48,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:46:48 BoogieIcfgContainer [2023-09-01 02:46:48,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:46:48,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:46:48,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:46:48,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:46:48,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:46:47" (1/3) ... [2023-09-01 02:46:48,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2415ff6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:46:48, skipping insertion in model container [2023-09-01 02:46:48,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:46:47" (2/3) ... [2023-09-01 02:46:48,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2415ff6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:46:48, skipping insertion in model container [2023-09-01 02:46:48,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:46:48" (3/3) ... [2023-09-01 02:46:48,638 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2023-09-01 02:46:48,653 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:46:48,654 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-09-01 02:46:48,654 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:46:48,774 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 02:46:48,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 281 transitions, 586 flow [2023-09-01 02:46:48,942 INFO L130 PetriNetUnfolder]: 22/278 cut-off events. [2023-09-01 02:46:48,942 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 02:46:48,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 278 events. 22/278 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 305 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 227. Up to 3 conditions per place. [2023-09-01 02:46:48,949 INFO L82 GeneralOperation]: Start removeDead. Operand has 269 places, 281 transitions, 586 flow [2023-09-01 02:46:48,958 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 274 transitions, 566 flow [2023-09-01 02:46:48,969 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:46:48,983 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 262 places, 274 transitions, 566 flow [2023-09-01 02:46:48,991 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 262 places, 274 transitions, 566 flow [2023-09-01 02:46:48,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 274 transitions, 566 flow [2023-09-01 02:46:49,043 INFO L130 PetriNetUnfolder]: 22/274 cut-off events. [2023-09-01 02:46:49,044 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 02:46:49,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 274 events. 22/274 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 306 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 227. Up to 3 conditions per place. [2023-09-01 02:46:49,049 INFO L119 LiptonReduction]: Number of co-enabled transitions 3794 [2023-09-01 02:47:17,488 INFO L134 LiptonReduction]: Checked pairs total: 7895 [2023-09-01 02:47:17,489 INFO L136 LiptonReduction]: Total number of compositions: 293 [2023-09-01 02:47:17,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:47:17,506 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;@6ae3cda5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:47:17,507 INFO L358 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2023-09-01 02:47:17,509 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 02:47:17,510 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:47:17,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:47:17,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:47:17,511 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:47:17,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:47:17,515 INFO L85 PathProgramCache]: Analyzing trace with hash 41322, now seen corresponding path program 1 times [2023-09-01 02:47:17,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:47:17,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741806764] [2023-09-01 02:47:17,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:47:17,524 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 02:47:17,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:47:17,527 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 02:47:17,531 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 02:47:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:47:17,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:47:17,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:47:17,861 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:47:17,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:47:17,912 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 02:47:17,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:47:17,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:47:17,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741806764] [2023-09-01 02:47:17,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741806764] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:47:17,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:47:17,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:47:17,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193994854] [2023-09-01 02:47:17,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:47:17,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:47:17,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:47:17,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:47:17,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:47:18,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 574 [2023-09-01 02:47:18,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:18,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:47:18,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 574 [2023-09-01 02:47:18,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:47:21,439 INFO L130 PetriNetUnfolder]: 16535/22976 cut-off events. [2023-09-01 02:47:21,439 INFO L131 PetriNetUnfolder]: For 536/536 co-relation queries the response was YES. [2023-09-01 02:47:21,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46467 conditions, 22976 events. 16535/22976 cut-off events. For 536/536 co-relation queries the response was YES. Maximal size of possible extension queue 1610. Compared 132314 event pairs, 14450 based on Foata normal form. 0/8181 useless extension candidates. Maximal degree in co-relation 21460. Up to 11491 conditions per place. [2023-09-01 02:47:21,607 INFO L137 encePairwiseOnDemand]: 562/574 looper letters, 116 selfloop transitions, 6 changer transitions 0/122 dead transitions. [2023-09-01 02:47:21,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 122 transitions, 524 flow [2023-09-01 02:47:21,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:47:21,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:47:21,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 797 transitions. [2023-09-01 02:47:21,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628339140534262 [2023-09-01 02:47:21,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 797 transitions. [2023-09-01 02:47:21,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 797 transitions. [2023-09-01 02:47:21,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:47:21,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 797 transitions. [2023-09-01 02:47:21,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.6666666666667) internal successors, (797), 3 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:21,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:21,655 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:21,657 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 150 flow. Second operand 3 states and 797 transitions. [2023-09-01 02:47:21,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 122 transitions, 524 flow [2023-09-01 02:47:21,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 122 transitions, 500 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 02:47:21,676 INFO L231 Difference]: Finished difference. Result has 65 places, 68 transitions, 182 flow [2023-09-01 02:47:21,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=65, PETRI_TRANSITIONS=68} [2023-09-01 02:47:21,685 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -3 predicate places. [2023-09-01 02:47:21,686 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 68 transitions, 182 flow [2023-09-01 02:47:21,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:21,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:47:21,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:47:21,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-09-01 02:47:21,896 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 02:47:21,897 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:47:21,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:47:21,898 INFO L85 PathProgramCache]: Analyzing trace with hash 41323, now seen corresponding path program 1 times [2023-09-01 02:47:21,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:47:21,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170198755] [2023-09-01 02:47:21,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:47:21,899 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 02:47:21,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:47:21,900 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 02:47:21,913 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 02:47:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:47:21,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:47:21,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:47:22,032 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:47:22,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 02:47:22,056 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 02:47:22,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:47:22,057 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:47:22,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170198755] [2023-09-01 02:47:22,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170198755] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:47:22,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:47:22,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:47:22,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559217523] [2023-09-01 02:47:22,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:47:22,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:47:22,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:47:22,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:47:22,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:47:22,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 574 [2023-09-01 02:47:22,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 68 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:22,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:47:22,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 574 [2023-09-01 02:47:22,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:47:24,529 INFO L130 PetriNetUnfolder]: 16535/22970 cut-off events. [2023-09-01 02:47:24,529 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2023-09-01 02:47:24,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46146 conditions, 22970 events. 16535/22970 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 1610. Compared 132313 event pairs, 14450 based on Foata normal form. 4/8191 useless extension candidates. Maximal degree in co-relation 23053. Up to 22970 conditions per place. [2023-09-01 02:47:24,657 INFO L137 encePairwiseOnDemand]: 570/574 looper letters, 64 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-09-01 02:47:24,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 306 flow [2023-09-01 02:47:24,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:47:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:47:24,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 729 transitions. [2023-09-01 02:47:24,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42334494773519166 [2023-09-01 02:47:24,661 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 729 transitions. [2023-09-01 02:47:24,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 729 transitions. [2023-09-01 02:47:24,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:47:24,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 729 transitions. [2023-09-01 02:47:24,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:24,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:24,669 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:24,669 INFO L175 Difference]: Start difference. First operand has 65 places, 68 transitions, 182 flow. Second operand 3 states and 729 transitions. [2023-09-01 02:47:24,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 306 flow [2023-09-01 02:47:24,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:47:24,671 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 166 flow [2023-09-01 02:47:24,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2023-09-01 02:47:24,672 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -6 predicate places. [2023-09-01 02:47:24,672 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 166 flow [2023-09-01 02:47:24,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:24,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:47:24,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:47:24,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-09-01 02:47:24,882 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 02:47:24,882 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:47:24,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:47:24,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1285445, now seen corresponding path program 1 times [2023-09-01 02:47:24,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:47:24,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504201131] [2023-09-01 02:47:24,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:47:24,884 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 02:47:24,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:47:24,885 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 02:47:24,888 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 02:47:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:47:24,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:47:24,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:47:25,056 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:47:25,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:47:25,116 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 02:47:25,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:47:25,296 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 02:47:25,297 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:47:25,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504201131] [2023-09-01 02:47:25,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504201131] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:47:25,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:47:25,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 02:47:25,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120370909] [2023-09-01 02:47:25,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:47:25,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:47:25,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:47:25,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:47:25,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:47:26,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 574 [2023-09-01 02:47:26,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:26,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:47:26,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 574 [2023-09-01 02:47:26,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:47:30,646 INFO L130 PetriNetUnfolder]: 24812/34469 cut-off events. [2023-09-01 02:47:30,647 INFO L131 PetriNetUnfolder]: For 171/171 co-relation queries the response was YES. [2023-09-01 02:47:30,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69245 conditions, 34469 events. 24812/34469 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 1872. Compared 206008 event pairs, 21675 based on Foata normal form. 0/12282 useless extension candidates. Maximal degree in co-relation 69237. Up to 11489 conditions per place. [2023-09-01 02:47:30,828 INFO L137 encePairwiseOnDemand]: 562/574 looper letters, 161 selfloop transitions, 27 changer transitions 0/188 dead transitions. [2023-09-01 02:47:30,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 188 transitions, 830 flow [2023-09-01 02:47:30,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:47:30,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:47:30,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1439 transitions. [2023-09-01 02:47:30,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178281068524971 [2023-09-01 02:47:30,833 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1439 transitions. [2023-09-01 02:47:30,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1439 transitions. [2023-09-01 02:47:30,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:47:30,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1439 transitions. [2023-09-01 02:47:30,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 239.83333333333334) internal successors, (1439), 6 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:30,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 574.0) internal successors, (4018), 7 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:30,849 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 574.0) internal successors, (4018), 7 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:30,849 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 166 flow. Second operand 6 states and 1439 transitions. [2023-09-01 02:47:30,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 188 transitions, 830 flow [2023-09-01 02:47:30,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 188 transitions, 829 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:47:30,854 INFO L231 Difference]: Finished difference. Result has 70 places, 86 transitions, 369 flow [2023-09-01 02:47:30,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=369, PETRI_PLACES=70, PETRI_TRANSITIONS=86} [2023-09-01 02:47:30,856 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-09-01 02:47:30,856 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 86 transitions, 369 flow [2023-09-01 02:47:30,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:30,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:47:30,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 02:47:30,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 02:47:31,075 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 02:47:31,076 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:47:31,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:47:31,076 INFO L85 PathProgramCache]: Analyzing trace with hash 39887349, now seen corresponding path program 1 times [2023-09-01 02:47:31,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:47:31,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1029454050] [2023-09-01 02:47:31,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:47:31,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:47:31,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:47:31,078 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 02:47:31,078 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 02:47:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:47:31,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 02:47:31,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:47:31,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:31,275 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-09-01 02:47:31,276 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 6 case distinctions, treesize of input 38 treesize of output 55 [2023-09-01 02:47:31,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:31,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:47:31,399 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:47:31,400 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 02:47:31,412 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 02:47:31,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:47:31,412 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:47:31,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1029454050] [2023-09-01 02:47:31,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1029454050] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:47:31,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:47:31,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:47:31,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919115267] [2023-09-01 02:47:31,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:47:31,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:47:31,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:47:31,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:47:31,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:47:31,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 574 [2023-09-01 02:47:31,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 86 transitions, 369 flow. Second operand has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:31,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:47:31,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 574 [2023-09-01 02:47:31,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:47:34,092 INFO L130 PetriNetUnfolder]: 19050/26784 cut-off events. [2023-09-01 02:47:34,093 INFO L131 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2023-09-01 02:47:34,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53949 conditions, 26784 events. 19050/26784 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 1661. Compared 159809 event pairs, 16587 based on Foata normal form. 0/10277 useless extension candidates. Maximal degree in co-relation 53936. Up to 26784 conditions per place. [2023-09-01 02:47:34,206 INFO L137 encePairwiseOnDemand]: 571/574 looper letters, 81 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-09-01 02:47:34,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 513 flow [2023-09-01 02:47:34,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:47:34,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:47:34,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 747 transitions. [2023-09-01 02:47:34,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4337979094076655 [2023-09-01 02:47:34,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 747 transitions. [2023-09-01 02:47:34,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 747 transitions. [2023-09-01 02:47:34,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:47:34,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 747 transitions. [2023-09-01 02:47:34,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:34,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:34,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:34,216 INFO L175 Difference]: Start difference. First operand has 70 places, 86 transitions, 369 flow. Second operand 3 states and 747 transitions. [2023-09-01 02:47:34,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 513 flow [2023-09-01 02:47:34,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 82 transitions, 483 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 02:47:34,219 INFO L231 Difference]: Finished difference. Result has 69 places, 82 transitions, 321 flow [2023-09-01 02:47:34,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=321, PETRI_PLACES=69, PETRI_TRANSITIONS=82} [2023-09-01 02:47:34,220 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2023-09-01 02:47:34,220 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 82 transitions, 321 flow [2023-09-01 02:47:34,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:34,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:47:34,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 02:47:34,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-09-01 02:47:34,430 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 02:47:34,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:47:34,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:47:34,431 INFO L85 PathProgramCache]: Analyzing trace with hash 39887350, now seen corresponding path program 1 times [2023-09-01 02:47:34,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:47:34,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280727218] [2023-09-01 02:47:34,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:47:34,432 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 02:47:34,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:47:34,437 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 02:47:34,446 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 02:47:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:47:34,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 02:47:34,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:47:34,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:34,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:34,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:34,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:34,665 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 02:47:34,665 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 2 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 02:47:34,686 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 02:47:34,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 02:47:34,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:34,727 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 02:47:34,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:34,750 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 02:47:34,771 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 02:47:34,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:47:34,772 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:47:34,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280727218] [2023-09-01 02:47:34,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280727218] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:47:34,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:47:34,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:47:34,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144878016] [2023-09-01 02:47:34,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:47:34,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:47:34,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:47:34,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:47:34,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:47:35,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 574 [2023-09-01 02:47:35,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 82 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:35,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:47:35,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 574 [2023-09-01 02:47:35,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:47:36,964 INFO L130 PetriNetUnfolder]: 13288/19099 cut-off events. [2023-09-01 02:47:36,964 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-09-01 02:47:36,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38553 conditions, 19099 events. 13288/19099 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 113000 event pairs, 11499 based on Foata normal form. 0/8261 useless extension candidates. Maximal degree in co-relation 38539. Up to 19099 conditions per place. [2023-09-01 02:47:37,036 INFO L137 encePairwiseOnDemand]: 571/574 looper letters, 77 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2023-09-01 02:47:37,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 78 transitions, 457 flow [2023-09-01 02:47:37,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:47:37,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:47:37,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 745 transitions. [2023-09-01 02:47:37,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326364692218351 [2023-09-01 02:47:37,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 745 transitions. [2023-09-01 02:47:37,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 745 transitions. [2023-09-01 02:47:37,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:47:37,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 745 transitions. [2023-09-01 02:47:37,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:37,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:37,046 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:37,046 INFO L175 Difference]: Start difference. First operand has 69 places, 82 transitions, 321 flow. Second operand 3 states and 745 transitions. [2023-09-01 02:47:37,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 78 transitions, 457 flow [2023-09-01 02:47:37,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 78 transitions, 456 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:47:37,049 INFO L231 Difference]: Finished difference. Result has 68 places, 78 transitions, 302 flow [2023-09-01 02:47:37,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=302, PETRI_PLACES=68, PETRI_TRANSITIONS=78} [2023-09-01 02:47:37,052 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2023-09-01 02:47:37,052 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 78 transitions, 302 flow [2023-09-01 02:47:37,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:37,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:47:37,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:47:37,065 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 02:47:37,262 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 02:47:37,263 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:47:37,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:47:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash -322930208, now seen corresponding path program 1 times [2023-09-01 02:47:37,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:47:37,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276386043] [2023-09-01 02:47:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:47:37,264 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 02:47:37,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:47:37,265 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 02:47:37,266 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 02:47:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:47:37,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 02:47:37,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:47:37,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:37,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:37,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:37,471 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 02:47:37,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-09-01 02:47:37,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 02:47:37,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:37,523 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 02:47:37,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:37,549 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 02:47:37,598 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 02:47:37,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:47:37,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:47:37,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276386043] [2023-09-01 02:47:37,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276386043] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:47:37,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:47:37,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:47:37,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784979243] [2023-09-01 02:47:37,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:47:37,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:47:37,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:47:37,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:47:37,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:47:37,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 574 [2023-09-01 02:47:37,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 78 transitions, 302 flow. Second operand has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:37,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:47:37,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 574 [2023-09-01 02:47:37,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:47:39,214 INFO L130 PetriNetUnfolder]: 12874/18463 cut-off events. [2023-09-01 02:47:39,214 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-09-01 02:47:39,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37282 conditions, 18463 events. 12874/18463 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 108521 event pairs, 11136 based on Foata normal form. 0/8108 useless extension candidates. Maximal degree in co-relation 37267. Up to 18463 conditions per place. [2023-09-01 02:47:39,288 INFO L137 encePairwiseOnDemand]: 571/574 looper letters, 75 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-09-01 02:47:39,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 76 transitions, 450 flow [2023-09-01 02:47:39,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:47:39,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:47:39,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 743 transitions. [2023-09-01 02:47:39,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43147502903600465 [2023-09-01 02:47:39,292 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 743 transitions. [2023-09-01 02:47:39,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 743 transitions. [2023-09-01 02:47:39,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:47:39,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 743 transitions. [2023-09-01 02:47:39,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:39,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:39,297 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:39,297 INFO L175 Difference]: Start difference. First operand has 68 places, 78 transitions, 302 flow. Second operand 3 states and 743 transitions. [2023-09-01 02:47:39,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 76 transitions, 450 flow [2023-09-01 02:47:39,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 76 transitions, 449 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:47:39,300 INFO L231 Difference]: Finished difference. Result has 67 places, 76 transitions, 299 flow [2023-09-01 02:47:39,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=299, PETRI_PLACES=67, PETRI_TRANSITIONS=76} [2023-09-01 02:47:39,300 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -1 predicate places. [2023-09-01 02:47:39,301 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 76 transitions, 299 flow [2023-09-01 02:47:39,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:39,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:47:39,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:47:39,316 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 02:47:39,510 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 02:47:39,510 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:47:39,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:47:39,511 INFO L85 PathProgramCache]: Analyzing trace with hash -322930209, now seen corresponding path program 1 times [2023-09-01 02:47:39,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:47:39,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776247600] [2023-09-01 02:47:39,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:47:39,511 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 02:47:39,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:47:39,512 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 02:47:39,513 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 02:47:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:47:39,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 02:47:39,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:47:39,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:39,664 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-09-01 02:47:39,665 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 4 case distinctions, treesize of input 29 treesize of output 48 [2023-09-01 02:47:39,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:39,830 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-09-01 02:47:39,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2023-09-01 02:47:39,985 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-09-01 02:47:39,985 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 02:47:40,119 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 02:47:40,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:47:40,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:47:40,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776247600] [2023-09-01 02:47:40,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776247600] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:47:40,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:47:40,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:47:40,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851448779] [2023-09-01 02:47:40,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:47:40,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:47:40,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:47:40,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:47:40,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:47:40,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 574 [2023-09-01 02:47:40,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 76 transitions, 299 flow. Second operand has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:40,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:47:40,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 574 [2023-09-01 02:47:40,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:47:41,900 INFO L130 PetriNetUnfolder]: 12460/17827 cut-off events. [2023-09-01 02:47:41,900 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-09-01 02:47:41,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36011 conditions, 17827 events. 12460/17827 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 1065. Compared 103923 event pairs, 10773 based on Foata normal form. 0/7955 useless extension candidates. Maximal degree in co-relation 35995. Up to 17827 conditions per place. [2023-09-01 02:47:42,002 INFO L137 encePairwiseOnDemand]: 571/574 looper letters, 73 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-09-01 02:47:42,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 74 transitions, 443 flow [2023-09-01 02:47:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:47:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:47:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 741 transitions. [2023-09-01 02:47:42,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43031358885017423 [2023-09-01 02:47:42,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 741 transitions. [2023-09-01 02:47:42,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 741 transitions. [2023-09-01 02:47:42,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:47:42,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 741 transitions. [2023-09-01 02:47:42,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:42,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:42,011 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:42,011 INFO L175 Difference]: Start difference. First operand has 67 places, 76 transitions, 299 flow. Second operand 3 states and 741 transitions. [2023-09-01 02:47:42,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 74 transitions, 443 flow [2023-09-01 02:47:42,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 74 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:47:42,014 INFO L231 Difference]: Finished difference. Result has 66 places, 74 transitions, 296 flow [2023-09-01 02:47:42,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=296, PETRI_PLACES=66, PETRI_TRANSITIONS=74} [2023-09-01 02:47:42,014 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2023-09-01 02:47:42,015 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 74 transitions, 296 flow [2023-09-01 02:47:42,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:42,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:47:42,015 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 02:47:42,031 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 02:47:42,225 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 02:47:42,225 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:47:42,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:47:42,226 INFO L85 PathProgramCache]: Analyzing trace with hash -355581910, now seen corresponding path program 2 times [2023-09-01 02:47:42,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:47:42,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684253559] [2023-09-01 02:47:42,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:47:42,226 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 02:47:42,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:47:42,227 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 02:47:42,232 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 02:47:42,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:47:42,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:47:42,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:47:42,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:47:42,405 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:47:42,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:47:42,532 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 02:47:42,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:47:43,113 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 02:47:43,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:47:43,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684253559] [2023-09-01 02:47:43,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684253559] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:47:43,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:47:43,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:47:43,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532431938] [2023-09-01 02:47:43,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:47:43,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:47:43,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:47:43,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:47:43,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:47:46,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 574 [2023-09-01 02:47:46,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 74 transitions, 296 flow. Second operand has 12 states, 12 states have (on average 211.0) internal successors, (2532), 12 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:46,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:47:46,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 574 [2023-09-01 02:47:46,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:47:49,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:47:51,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:47:52,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:47:55,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:47:56,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:47:58,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:48:00,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:48:01,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:48:04,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:48:05,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:48:07,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:48:09,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:48:17,752 INFO L130 PetriNetUnfolder]: 41514/59380 cut-off events. [2023-09-01 02:48:17,752 INFO L131 PetriNetUnfolder]: For 636/636 co-relation queries the response was YES. [2023-09-01 02:48:17,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119827 conditions, 59380 events. 41514/59380 cut-off events. For 636/636 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 385403 event pairs, 35910 based on Foata normal form. 18/26484 useless extension candidates. Maximal degree in co-relation 119810. Up to 6400 conditions per place. [2023-09-01 02:48:18,074 INFO L137 encePairwiseOnDemand]: 564/574 looper letters, 438 selfloop transitions, 52 changer transitions 0/490 dead transitions. [2023-09-01 02:48:18,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 490 transitions, 2314 flow [2023-09-01 02:48:18,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 02:48:18,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 02:48:18,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3028 transitions. [2023-09-01 02:48:18,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43960511033681765 [2023-09-01 02:48:18,082 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3028 transitions. [2023-09-01 02:48:18,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3028 transitions. [2023-09-01 02:48:18,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:18,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3028 transitions. [2023-09-01 02:48:18,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 252.33333333333334) internal successors, (3028), 12 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:18,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 574.0) internal successors, (7462), 13 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:18,098 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 574.0) internal successors, (7462), 13 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:18,098 INFO L175 Difference]: Start difference. First operand has 66 places, 74 transitions, 296 flow. Second operand 12 states and 3028 transitions. [2023-09-01 02:48:18,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 490 transitions, 2314 flow [2023-09-01 02:48:18,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 490 transitions, 2313 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:48:18,105 INFO L231 Difference]: Finished difference. Result has 83 places, 105 transitions, 685 flow [2023-09-01 02:48:18,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=685, PETRI_PLACES=83, PETRI_TRANSITIONS=105} [2023-09-01 02:48:18,106 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 15 predicate places. [2023-09-01 02:48:18,106 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 105 transitions, 685 flow [2023-09-01 02:48:18,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 211.0) internal successors, (2532), 12 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:18,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:18,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:48:18,121 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 02:48:18,317 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 02:48:18,317 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:48:18,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:18,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1420903504, now seen corresponding path program 1 times [2023-09-01 02:48:18,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:48:18,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817295918] [2023-09-01 02:48:18,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:18,318 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 02:48:18,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:48:18,322 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 02:48:18,324 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 02:48:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:18,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:48:18,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:48:18,461 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 02:48:18,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:48:18,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:48:18,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817295918] [2023-09-01 02:48:18,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817295918] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:48:18,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:48:18,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:48:18,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837402661] [2023-09-01 02:48:18,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:48:18,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:48:18,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:48:18,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:48:18,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:48:18,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 574 [2023-09-01 02:48:18,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 105 transitions, 685 flow. Second operand has 4 states, 4 states have (on average 224.75) internal successors, (899), 4 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:18,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:48:18,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 574 [2023-09-01 02:48:18,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:24,563 INFO L130 PetriNetUnfolder]: 42676/61416 cut-off events. [2023-09-01 02:48:24,563 INFO L131 PetriNetUnfolder]: For 741/741 co-relation queries the response was YES. [2023-09-01 02:48:24,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124254 conditions, 61416 events. 42676/61416 cut-off events. For 741/741 co-relation queries the response was YES. Maximal size of possible extension queue 1816. Compared 404479 event pairs, 36980 based on Foata normal form. 820/28853 useless extension candidates. Maximal degree in co-relation 124229. Up to 59379 conditions per place. [2023-09-01 02:48:24,884 INFO L137 encePairwiseOnDemand]: 560/574 looper letters, 158 selfloop transitions, 3 changer transitions 1/162 dead transitions. [2023-09-01 02:48:24,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 162 transitions, 1415 flow [2023-09-01 02:48:24,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:48:24,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:48:24,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 981 transitions. [2023-09-01 02:48:24,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42726480836236935 [2023-09-01 02:48:24,887 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 981 transitions. [2023-09-01 02:48:24,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 981 transitions. [2023-09-01 02:48:24,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:24,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 981 transitions. [2023-09-01 02:48:24,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 245.25) internal successors, (981), 4 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:24,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 574.0) internal successors, (2870), 5 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:24,893 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 574.0) internal successors, (2870), 5 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:24,893 INFO L175 Difference]: Start difference. First operand has 83 places, 105 transitions, 685 flow. Second operand 4 states and 981 transitions. [2023-09-01 02:48:24,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 162 transitions, 1415 flow [2023-09-01 02:48:24,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 162 transitions, 1264 flow, removed 35 selfloop flow, removed 4 redundant places. [2023-09-01 02:48:24,899 INFO L231 Difference]: Finished difference. Result has 83 places, 105 transitions, 621 flow [2023-09-01 02:48:24,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=621, PETRI_PLACES=83, PETRI_TRANSITIONS=105} [2023-09-01 02:48:24,900 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 15 predicate places. [2023-09-01 02:48:24,900 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 105 transitions, 621 flow [2023-09-01 02:48:24,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.75) internal successors, (899), 4 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:24,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:24,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:48:24,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-09-01 02:48:25,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:48:25,110 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:48:25,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:25,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1098255226, now seen corresponding path program 1 times [2023-09-01 02:48:25,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:48:25,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804882642] [2023-09-01 02:48:25,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:25,111 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:48:25,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:48:25,112 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 02:48:25,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 02:48:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:25,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:48:25,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:48:25,288 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 02:48:25,288 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 3 case distinctions, treesize of input 33 treesize of output 44 [2023-09-01 02:48:25,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:48:25,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:48:25,357 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:48:25,357 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 02:48:25,407 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 02:48:25,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:48:25,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:48:25,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804882642] [2023-09-01 02:48:25,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804882642] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:48:25,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:48:25,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:48:25,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9504020] [2023-09-01 02:48:25,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:48:25,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:48:25,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:48:25,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:48:25,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:48:25,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 574 [2023-09-01 02:48:25,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 105 transitions, 621 flow. Second operand has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:25,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:48:25,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 574 [2023-09-01 02:48:25,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:31,556 INFO L130 PetriNetUnfolder]: 40956/58776 cut-off events. [2023-09-01 02:48:31,556 INFO L131 PetriNetUnfolder]: For 3913/3913 co-relation queries the response was YES. [2023-09-01 02:48:31,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138422 conditions, 58776 events. 40956/58776 cut-off events. For 3913/3913 co-relation queries the response was YES. Maximal size of possible extension queue 1864. Compared 384382 event pairs, 35450 based on Foata normal form. 0/27426 useless extension candidates. Maximal degree in co-relation 138395. Up to 58776 conditions per place. [2023-09-01 02:48:31,948 INFO L137 encePairwiseOnDemand]: 571/574 looper letters, 102 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2023-09-01 02:48:31,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 103 transitions, 823 flow [2023-09-01 02:48:31,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:48:31,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:48:31,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 727 transitions. [2023-09-01 02:48:31,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4221835075493612 [2023-09-01 02:48:31,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 727 transitions. [2023-09-01 02:48:31,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 727 transitions. [2023-09-01 02:48:31,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:31,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 727 transitions. [2023-09-01 02:48:31,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.33333333333334) internal successors, (727), 3 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:31,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:31,955 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:31,955 INFO L175 Difference]: Start difference. First operand has 83 places, 105 transitions, 621 flow. Second operand 3 states and 727 transitions. [2023-09-01 02:48:31,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 103 transitions, 823 flow [2023-09-01 02:48:31,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 103 transitions, 817 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 02:48:31,962 INFO L231 Difference]: Finished difference. Result has 82 places, 103 transitions, 613 flow [2023-09-01 02:48:31,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=613, PETRI_PLACES=82, PETRI_TRANSITIONS=103} [2023-09-01 02:48:31,963 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 14 predicate places. [2023-09-01 02:48:31,963 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 103 transitions, 613 flow [2023-09-01 02:48:31,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:31,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:31,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:48:31,973 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 02:48:32,173 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 02:48:32,173 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:48:32,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:32,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1399459659, now seen corresponding path program 1 times [2023-09-01 02:48:32,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:48:32,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526619540] [2023-09-01 02:48:32,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:32,174 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 02:48:32,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:48:32,175 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 02:48:32,176 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 02:48:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:32,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 02:48:32,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:48:32,388 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:48:32,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:48:32,470 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:48:32,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 02:48:32,592 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 02:48:32,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 02:48:32,597 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 02:48:32,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:48:32,634 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 02:48:32,642 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:48:32,643 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 02:48:32,697 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 02:48:32,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:48:38,477 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 02:48:38,477 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:48:38,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526619540] [2023-09-01 02:48:38,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526619540] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:48:38,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:48:38,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 02:48:38,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196562683] [2023-09-01 02:48:38,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:48:38,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 02:48:38,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:48:38,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 02:48:38,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-09-01 02:48:40,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:48:46,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:48:48,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:48:50,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:48:52,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:48:54,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:48:58,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:00,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:02,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:05,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:07,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:09,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:12,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:14,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:16,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:20,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:23,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:23,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 574 [2023-09-01 02:49:23,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 103 transitions, 613 flow. Second operand has 10 states, 10 states have (on average 182.6) internal successors, (1826), 10 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:23,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:23,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 574 [2023-09-01 02:49:23,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:37,867 WARN L222 SmtUtils]: Spent 13.82s on a formula simplification. DAG size of input: 78 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:49:45,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:50:00,826 WARN L222 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 77 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:50:03,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:50:06,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:50:19,323 WARN L222 SmtUtils]: Spent 6.85s on a formula simplification. DAG size of input: 73 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:50:31,591 INFO L130 PetriNetUnfolder]: 78680/112928 cut-off events. [2023-09-01 02:50:31,591 INFO L131 PetriNetUnfolder]: For 8961/8961 co-relation queries the response was YES. [2023-09-01 02:50:31,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260280 conditions, 112928 events. 78680/112928 cut-off events. For 8961/8961 co-relation queries the response was YES. Maximal size of possible extension queue 3172. Compared 793627 event pairs, 66490 based on Foata normal form. 0/57238 useless extension candidates. Maximal degree in co-relation 260252. Up to 56761 conditions per place. [2023-09-01 02:50:32,294 INFO L137 encePairwiseOnDemand]: 558/574 looper letters, 209 selfloop transitions, 43 changer transitions 0/252 dead transitions. [2023-09-01 02:50:32,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 252 transitions, 1919 flow [2023-09-01 02:50:32,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 02:50:32,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 02:50:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2692 transitions. [2023-09-01 02:50:32,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3349925335988054 [2023-09-01 02:50:32,300 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2692 transitions. [2023-09-01 02:50:32,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2692 transitions. [2023-09-01 02:50:32,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:32,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2692 transitions. [2023-09-01 02:50:32,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 192.28571428571428) internal successors, (2692), 14 states have internal predecessors, (2692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:32,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 574.0) internal successors, (8610), 15 states have internal predecessors, (8610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:32,316 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 574.0) internal successors, (8610), 15 states have internal predecessors, (8610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:32,316 INFO L175 Difference]: Start difference. First operand has 82 places, 103 transitions, 613 flow. Second operand 14 states and 2692 transitions. [2023-09-01 02:50:32,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 252 transitions, 1919 flow [2023-09-01 02:50:32,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 252 transitions, 1918 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:50:32,327 INFO L231 Difference]: Finished difference. Result has 99 places, 131 transitions, 1050 flow [2023-09-01 02:50:32,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1050, PETRI_PLACES=99, PETRI_TRANSITIONS=131} [2023-09-01 02:50:32,328 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 31 predicate places. [2023-09-01 02:50:32,328 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 131 transitions, 1050 flow [2023-09-01 02:50:32,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 182.6) internal successors, (1826), 10 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:32,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:32,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:50:32,341 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 02:50:32,539 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 02:50:32,539 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:50:32,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:32,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1098255225, now seen corresponding path program 1 times [2023-09-01 02:50:32,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:32,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680387028] [2023-09-01 02:50:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:32,540 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 02:50:32,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:32,541 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 02:50:32,542 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 02:50:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:50:32,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 02:50:32,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:32,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:32,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:32,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:32,791 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 02:50:32,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-09-01 02:50:32,807 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 02:50:32,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:32,861 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 02:50:32,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:32,930 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 02:50:33,054 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 02:50:33,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:50:33,055 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:33,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680387028] [2023-09-01 02:50:33,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680387028] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:50:33,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:50:33,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:50:33,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000940401] [2023-09-01 02:50:33,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:50:33,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:50:33,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:33,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:50:33,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:50:33,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 574 [2023-09-01 02:50:33,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 131 transitions, 1050 flow. Second operand has 5 states, 5 states have (on average 228.6) internal successors, (1143), 5 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:33,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:33,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 574 [2023-09-01 02:50:33,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:45,292 INFO L130 PetriNetUnfolder]: 75360/107808 cut-off events. [2023-09-01 02:50:45,292 INFO L131 PetriNetUnfolder]: For 22177/22177 co-relation queries the response was YES. [2023-09-01 02:50:45,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268132 conditions, 107808 events. 75360/107808 cut-off events. For 22177/22177 co-relation queries the response was YES. Maximal size of possible extension queue 3377. Compared 752397 event pairs, 63620 based on Foata normal form. 0/59268 useless extension candidates. Maximal degree in co-relation 268098. Up to 107808 conditions per place. [2023-09-01 02:50:46,094 INFO L137 encePairwiseOnDemand]: 571/574 looper letters, 128 selfloop transitions, 1 changer transitions 0/129 dead transitions. [2023-09-01 02:50:46,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 129 transitions, 1304 flow [2023-09-01 02:50:46,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:50:46,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:50:46,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 731 transitions. [2023-09-01 02:50:46,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4245063879210221 [2023-09-01 02:50:46,096 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 731 transitions. [2023-09-01 02:50:46,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 731 transitions. [2023-09-01 02:50:46,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:46,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 731 transitions. [2023-09-01 02:50:46,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:46,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:46,100 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:46,100 INFO L175 Difference]: Start difference. First operand has 99 places, 131 transitions, 1050 flow. Second operand 3 states and 731 transitions. [2023-09-01 02:50:46,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 129 transitions, 1304 flow [2023-09-01 02:50:46,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 129 transitions, 1289 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 02:50:46,245 INFO L231 Difference]: Finished difference. Result has 98 places, 129 transitions, 1033 flow [2023-09-01 02:50:46,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1033, PETRI_PLACES=98, PETRI_TRANSITIONS=129} [2023-09-01 02:50:46,245 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 30 predicate places. [2023-09-01 02:50:46,246 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 129 transitions, 1033 flow [2023-09-01 02:50:46,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 228.6) internal successors, (1143), 5 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:46,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:46,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:50:46,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-09-01 02:50:46,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:46,459 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:50:46,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:46,459 INFO L85 PathProgramCache]: Analyzing trace with hash -433575514, now seen corresponding path program 1 times [2023-09-01 02:50:46,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:46,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616539329] [2023-09-01 02:50:46,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:46,460 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 02:50:46,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:46,461 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:50:46,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 02:50:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:50:46,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 02:50:46,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:46,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 02:50:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:50:46,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:50:46,588 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:46,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616539329] [2023-09-01 02:50:46,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616539329] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:50:46,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:50:46,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:50:46,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056153000] [2023-09-01 02:50:46,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:50:46,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:50:46,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:46,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:50:46,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:50:46,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 574 [2023-09-01 02:50:46,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 129 transitions, 1033 flow. Second operand has 4 states, 4 states have (on average 222.25) internal successors, (889), 4 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:46,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:46,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 574 [2023-09-01 02:50:46,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:55,900 INFO L130 PetriNetUnfolder]: 58920/84528 cut-off events. [2023-09-01 02:50:55,901 INFO L131 PetriNetUnfolder]: For 18202/18202 co-relation queries the response was YES. [2023-09-01 02:50:56,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213397 conditions, 84528 events. 58920/84528 cut-off events. For 18202/18202 co-relation queries the response was YES. Maximal size of possible extension queue 2622. Compared 574020 event pairs, 48960 based on Foata normal form. 0/49428 useless extension candidates. Maximal degree in co-relation 213362. Up to 84364 conditions per place. [2023-09-01 02:50:56,564 INFO L137 encePairwiseOnDemand]: 570/574 looper letters, 113 selfloop transitions, 14 changer transitions 0/127 dead transitions. [2023-09-01 02:50:56,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 127 transitions, 1283 flow [2023-09-01 02:50:56,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:50:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:50:56,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 928 transitions. [2023-09-01 02:50:56,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2023-09-01 02:50:56,566 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 928 transitions. [2023-09-01 02:50:56,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 928 transitions. [2023-09-01 02:50:56,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:56,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 928 transitions. [2023-09-01 02:50:56,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:56,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 574.0) internal successors, (2870), 5 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:56,570 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 574.0) internal successors, (2870), 5 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:56,570 INFO L175 Difference]: Start difference. First operand has 98 places, 129 transitions, 1033 flow. Second operand 4 states and 928 transitions. [2023-09-01 02:50:56,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 127 transitions, 1283 flow [2023-09-01 02:50:56,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 127 transitions, 1282 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:50:56,681 INFO L231 Difference]: Finished difference. Result has 98 places, 127 transitions, 1056 flow [2023-09-01 02:50:56,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=1028, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1056, PETRI_PLACES=98, PETRI_TRANSITIONS=127} [2023-09-01 02:50:56,681 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 30 predicate places. [2023-09-01 02:50:56,681 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 127 transitions, 1056 flow [2023-09-01 02:50:56,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.25) internal successors, (889), 4 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:56,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:56,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:50:56,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 02:50:56,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:56,883 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:50:56,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:56,883 INFO L85 PathProgramCache]: Analyzing trace with hash -433575513, now seen corresponding path program 1 times [2023-09-01 02:50:56,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:56,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836638235] [2023-09-01 02:50:56,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:56,884 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 02:50:56,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:56,885 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:50:56,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 02:50:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:50:56,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:50:56,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:50:56,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:50:56,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:56,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836638235] [2023-09-01 02:50:56,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836638235] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:50:56,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:50:56,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:50:56,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542664500] [2023-09-01 02:50:56,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:50:56,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:50:56,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:56,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:50:56,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:50:57,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 574 [2023-09-01 02:50:57,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 127 transitions, 1056 flow. Second operand has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:57,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:57,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 574 [2023-09-01 02:50:57,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:51:10,747 INFO L130 PetriNetUnfolder]: 89880/128528 cut-off events. [2023-09-01 02:51:10,748 INFO L131 PetriNetUnfolder]: For 33549/33549 co-relation queries the response was YES. [2023-09-01 02:51:11,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325312 conditions, 128528 events. 89880/128528 cut-off events. For 33549/33549 co-relation queries the response was YES. Maximal size of possible extension queue 3829. Compared 922609 event pairs, 37780 based on Foata normal form. 2860/75428 useless extension candidates. Maximal degree in co-relation 325276. Up to 70181 conditions per place. [2023-09-01 02:51:11,809 INFO L137 encePairwiseOnDemand]: 569/574 looper letters, 150 selfloop transitions, 3 changer transitions 0/153 dead transitions. [2023-09-01 02:51:11,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 153 transitions, 1462 flow [2023-09-01 02:51:11,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:51:11,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:51:11,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2023-09-01 02:51:11,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44889663182346107 [2023-09-01 02:51:11,811 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2023-09-01 02:51:11,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2023-09-01 02:51:11,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:51:11,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2023-09-01 02:51:11,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:11,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:11,814 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:11,814 INFO L175 Difference]: Start difference. First operand has 98 places, 127 transitions, 1056 flow. Second operand 3 states and 773 transitions. [2023-09-01 02:51:11,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 153 transitions, 1462 flow [2023-09-01 02:51:11,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 153 transitions, 1447 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:51:11,990 INFO L231 Difference]: Finished difference. Result has 99 places, 129 transitions, 1062 flow [2023-09-01 02:51:11,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1062, PETRI_PLACES=99, PETRI_TRANSITIONS=129} [2023-09-01 02:51:11,991 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 31 predicate places. [2023-09-01 02:51:11,991 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 129 transitions, 1062 flow [2023-09-01 02:51:11,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:11,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:51:11,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:51:11,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 02:51:12,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:51:12,193 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:51:12,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:51:12,193 INFO L85 PathProgramCache]: Analyzing trace with hash -553477236, now seen corresponding path program 1 times [2023-09-01 02:51:12,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:51:12,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605680341] [2023-09-01 02:51:12,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:51:12,193 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:51:12,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:51:12,194 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:51:12,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 02:51:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:51:12,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:51:12,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:51:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:51:12,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:51:12,343 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:51:12,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605680341] [2023-09-01 02:51:12,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605680341] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:51:12,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:51:12,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:51:12,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670397315] [2023-09-01 02:51:12,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:51:12,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:51:12,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:51:12,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:51:12,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:51:12,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 574 [2023-09-01 02:51:12,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 129 transitions, 1062 flow. Second operand has 3 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:12,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:51:12,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 574 [2023-09-01 02:51:12,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:51:23,260 INFO L130 PetriNetUnfolder]: 67320/98688 cut-off events. [2023-09-01 02:51:23,261 INFO L131 PetriNetUnfolder]: For 28682/28682 co-relation queries the response was YES. [2023-09-01 02:51:23,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262513 conditions, 98688 events. 67320/98688 cut-off events. For 28682/28682 co-relation queries the response was YES. Maximal size of possible extension queue 2924. Compared 717258 event pairs, 19480 based on Foata normal form. 4160/60328 useless extension candidates. Maximal degree in co-relation 262476. Up to 81161 conditions per place. [2023-09-01 02:51:24,306 INFO L137 encePairwiseOnDemand]: 566/574 looper letters, 147 selfloop transitions, 3 changer transitions 0/150 dead transitions. [2023-09-01 02:51:24,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 150 transitions, 1444 flow [2023-09-01 02:51:24,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:51:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:51:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 769 transitions. [2023-09-01 02:51:24,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4465737514518002 [2023-09-01 02:51:24,308 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 769 transitions. [2023-09-01 02:51:24,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 769 transitions. [2023-09-01 02:51:24,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:51:24,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 769 transitions. [2023-09-01 02:51:24,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:24,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:24,311 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:24,311 INFO L175 Difference]: Start difference. First operand has 99 places, 129 transitions, 1062 flow. Second operand 3 states and 769 transitions. [2023-09-01 02:51:24,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 150 transitions, 1444 flow [2023-09-01 02:51:24,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 150 transitions, 1439 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:51:24,452 INFO L231 Difference]: Finished difference. Result has 101 places, 131 transitions, 1090 flow [2023-09-01 02:51:24,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=1059, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1090, PETRI_PLACES=101, PETRI_TRANSITIONS=131} [2023-09-01 02:51:24,452 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 33 predicate places. [2023-09-01 02:51:24,452 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 131 transitions, 1090 flow [2023-09-01 02:51:24,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:24,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:51:24,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:51:24,460 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 (16)] Forceful destruction successful, exit code 0 [2023-09-01 02:51:24,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:51:24,653 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:51:24,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:51:24,654 INFO L85 PathProgramCache]: Analyzing trace with hash 940356316, now seen corresponding path program 1 times [2023-09-01 02:51:24,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:51:24,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452433957] [2023-09-01 02:51:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:51:24,654 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 02:51:24,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:51:24,655 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:51:24,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 02:51:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:51:24,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:51:24,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:51:24,799 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 02:51:24,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:51:24,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:51:24,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452433957] [2023-09-01 02:51:24,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452433957] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:51:24,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:51:24,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:51:24,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972565083] [2023-09-01 02:51:24,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:51:24,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:51:24,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:51:24,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:51:24,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:51:24,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 574 [2023-09-01 02:51:24,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 131 transitions, 1090 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:24,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:51:24,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 574 [2023-09-01 02:51:24,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:51:33,825 INFO L130 PetriNetUnfolder]: 51880/77688 cut-off events. [2023-09-01 02:51:33,825 INFO L131 PetriNetUnfolder]: For 32722/32722 co-relation queries the response was YES. [2023-09-01 02:51:34,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227515 conditions, 77688 events. 51880/77688 cut-off events. For 32722/32722 co-relation queries the response was YES. Maximal size of possible extension queue 2360. Compared 562974 event pairs, 22500 based on Foata normal form. 1500/44628 useless extension candidates. Maximal degree in co-relation 227476. Up to 67661 conditions per place. [2023-09-01 02:51:34,552 INFO L137 encePairwiseOnDemand]: 567/574 looper letters, 145 selfloop transitions, 3 changer transitions 0/148 dead transitions. [2023-09-01 02:51:34,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 148 transitions, 1474 flow [2023-09-01 02:51:34,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:51:34,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:51:34,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 768 transitions. [2023-09-01 02:51:34,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2023-09-01 02:51:34,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 768 transitions. [2023-09-01 02:51:34,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 768 transitions. [2023-09-01 02:51:34,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:51:34,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 768 transitions. [2023-09-01 02:51:34,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:34,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:34,558 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:34,558 INFO L175 Difference]: Start difference. First operand has 101 places, 131 transitions, 1090 flow. Second operand 3 states and 768 transitions. [2023-09-01 02:51:34,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 148 transitions, 1474 flow [2023-09-01 02:51:34,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 148 transitions, 1471 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:51:34,705 INFO L231 Difference]: Finished difference. Result has 103 places, 133 transitions, 1112 flow [2023-09-01 02:51:34,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1112, PETRI_PLACES=103, PETRI_TRANSITIONS=133} [2023-09-01 02:51:34,705 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 35 predicate places. [2023-09-01 02:51:34,705 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 133 transitions, 1112 flow [2023-09-01 02:51:34,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:34,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:51:34,706 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:51:34,713 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 (17)] Ended with exit code 0 [2023-09-01 02:51:34,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:51:34,906 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:51:34,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:51:34,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1576424810, now seen corresponding path program 1 times [2023-09-01 02:51:34,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:51:34,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18027047] [2023-09-01 02:51:34,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:51:34,907 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 02:51:34,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:51:34,908 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:51:34,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 02:51:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:51:35,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 02:51:35,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:51:35,232 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:51:35,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:51:35,405 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:51:35,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 02:51:35,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:51:35,774 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 19 treesize of output 19 [2023-09-01 02:51:35,834 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 02:51:35,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 02:51:35,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:51:35,943 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 02:51:35,971 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:51:35,971 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 02:51:36,134 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 02:51:36,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:51:47,700 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 02:51:47,701 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:51:47,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18027047] [2023-09-01 02:51:47,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18027047] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:51:47,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:51:47,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-09-01 02:51:47,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901618369] [2023-09-01 02:51:47,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:51:47,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 02:51:47,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:51:47,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 02:51:47,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-09-01 02:51:52,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:51:55,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:51:59,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:00,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:03,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:11,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:14,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:19,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:24,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:27,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:32,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:44,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:46,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:50,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:58,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:53:02,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:53:05,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:53:12,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:53:18,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:53:31,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:53:33,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 574 [2023-09-01 02:53:33,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 133 transitions, 1112 flow. Second operand has 16 states, 16 states have (on average 184.375) internal successors, (2950), 16 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:53:33,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:53:33,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 574 [2023-09-01 02:53:33,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:54:00,638 WARN L222 SmtUtils]: Spent 27.07s on a formula simplification. DAG size of input: 105 DAG size of output: 103 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:54:02,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:54:04,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:54:08,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:54:19,203 WARN L222 SmtUtils]: Spent 9.98s on a formula simplification. DAG size of input: 73 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:54:22,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:54:58,118 WARN L222 SmtUtils]: Spent 33.41s on a formula simplification. DAG size of input: 103 DAG size of output: 101 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:55:00,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:55:02,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:55:04,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:55:06,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:55:08,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:55:10,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:55:38,646 WARN L222 SmtUtils]: Spent 27.75s on a formula simplification. DAG size of input: 96 DAG size of output: 94 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:55:41,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:55:43,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:55:45,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:55:47,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:55:57,195 WARN L222 SmtUtils]: Spent 9.39s on a formula simplification. DAG size of input: 88 DAG size of output: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:56:00,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:56:02,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:56:16,418 WARN L222 SmtUtils]: Spent 6.53s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:56:19,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:56:27,837 WARN L222 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:56:29,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:56:33,103 WARN L539 Checker$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 02:56:38,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:56:41,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:56:43,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:57:01,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:57:11,390 WARN L222 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:57:27,409 INFO L130 PetriNetUnfolder]: 77056/115705 cut-off events. [2023-09-01 02:57:27,409 INFO L131 PetriNetUnfolder]: For 76872/76872 co-relation queries the response was YES. [2023-09-01 02:57:28,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363793 conditions, 115705 events. 77056/115705 cut-off events. For 76872/76872 co-relation queries the response was YES. Maximal size of possible extension queue 2548. Compared 866831 event pairs, 52800 based on Foata normal form. 3800/68585 useless extension candidates. Maximal degree in co-relation 363752. Up to 57592 conditions per place. [2023-09-01 02:57:28,461 INFO L137 encePairwiseOnDemand]: 559/574 looper letters, 284 selfloop transitions, 66 changer transitions 0/350 dead transitions. [2023-09-01 02:57:28,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 350 transitions, 3203 flow [2023-09-01 02:57:28,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 02:57:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 02:57:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4412 transitions. [2023-09-01 02:57:28,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3341917891228602 [2023-09-01 02:57:28,469 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4412 transitions. [2023-09-01 02:57:28,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4412 transitions. [2023-09-01 02:57:28,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:57:28,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4412 transitions. [2023-09-01 02:57:28,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 191.82608695652175) internal successors, (4412), 23 states have internal predecessors, (4412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:28,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 574.0) internal successors, (13776), 24 states have internal predecessors, (13776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:28,486 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 574.0) internal successors, (13776), 24 states have internal predecessors, (13776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:28,486 INFO L175 Difference]: Start difference. First operand has 103 places, 133 transitions, 1112 flow. Second operand 23 states and 4412 transitions. [2023-09-01 02:57:28,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 350 transitions, 3203 flow [2023-09-01 02:57:28,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 350 transitions, 3194 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:57:28,719 INFO L231 Difference]: Finished difference. Result has 131 places, 171 transitions, 1824 flow [2023-09-01 02:57:28,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1824, PETRI_PLACES=131, PETRI_TRANSITIONS=171} [2023-09-01 02:57:28,720 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 63 predicate places. [2023-09-01 02:57:28,720 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 171 transitions, 1824 flow [2023-09-01 02:57:28,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 184.375) internal successors, (2950), 16 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:28,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:57:28,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:57:28,730 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 (18)] Ended with exit code 0 [2023-09-01 02:57:28,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:57:28,927 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:57:28,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:57:28,927 INFO L85 PathProgramCache]: Analyzing trace with hash 811714020, now seen corresponding path program 1 times [2023-09-01 02:57:28,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:57:28,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688701397] [2023-09-01 02:57:28,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:57:28,927 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 02:57:28,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:57:28,928 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:57:28,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 02:57:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:57:29,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:57:29,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:57:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:57:29,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:57:29,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:57:29,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688701397] [2023-09-01 02:57:29,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688701397] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:57:29,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:57:29,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:57:29,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357348180] [2023-09-01 02:57:29,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:57:29,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:57:29,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:57:29,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:57:29,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:57:29,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 574 [2023-09-01 02:57:29,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 171 transitions, 1824 flow. Second operand has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:29,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:57:29,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 574 [2023-09-01 02:57:29,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand