./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-word-subst.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-word-subst.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 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:53:58,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:53:58,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:53:58,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:53:58,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:53:58,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:53:58,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:53:58,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:53:58,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:53:58,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:53:58,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:53:58,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:53:58,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:53:58,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:53:58,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:53:58,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:53:58,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:53:58,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:53:58,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:53:58,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:53:58,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:53:58,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:53:58,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:53:58,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:53:58,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:53:58,479 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:53:58,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:53:58,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:53:58,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:53:58,482 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:53:58,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:53:58,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:53:58,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:53:58,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:53:58,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:53:58,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:53:58,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:53:58,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:53:58,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:53:58,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:53:58,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:53:58,496 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 01:53:58,533 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:53:58,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:53:58,534 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:53:58,534 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:53:58,535 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:53:58,535 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:53:58,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:53:58,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:53:58,536 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:53:58,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:53:58,538 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:53:58,538 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:53:58,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:53:58,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:53:58,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:53:58,539 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:53:58,539 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:53:58,539 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:53:58,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:53:58,539 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:53:58,540 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:53:58,540 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:53:58,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:53:58,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:53:58,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:53:58,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:53:58,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:53:58,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:53:58,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 01:53:58,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 01:53:58,542 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:53:58,542 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:53:58,542 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:53:58,542 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:53:58,542 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:53:58,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:53:58,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:53:58,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:53:58,880 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:53:58,881 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:53:58,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-subst.wvr.c [2023-09-01 01:54:00,079 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:54:00,315 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:54:00,316 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-subst.wvr.c [2023-09-01 01:54:00,327 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56caac4f6/13f45c7a44614722b21cdc2a92180eb6/FLAGc0956ec8e [2023-09-01 01:54:00,339 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56caac4f6/13f45c7a44614722b21cdc2a92180eb6 [2023-09-01 01:54:00,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:54:00,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:54:00,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:54:00,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:54:00,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:54:00,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:54:00" (1/1) ... [2023-09-01 01:54:00,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32973d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:00, skipping insertion in model container [2023-09-01 01:54:00,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:54:00" (1/1) ... [2023-09-01 01:54:00,352 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:54:00,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:54:00,534 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-subst.wvr.c[3345,3358] [2023-09-01 01:54:00,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:54:00,566 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 01:54:00,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@15169b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:00, skipping insertion in model container [2023-09-01 01:54:00,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:54:00,569 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 01:54:00,571 INFO L158 Benchmark]: Toolchain (without parser) took 228.42ms. Allocated memory is still 69.2MB. Free memory was 47.1MB in the beginning and 37.0MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 01:54:00,572 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 56.6MB. Free memory is still 34.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 01:54:00,572 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.66ms. Allocated memory is still 69.2MB. Free memory was 46.9MB in the beginning and 37.0MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 01:54:00,574 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 56.6MB. Free memory is still 34.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 226.66ms. Allocated memory is still 69.2MB. Free memory was 46.9MB in the beginning and 37.0MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 138]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-word-subst.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 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:54:02,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:54:02,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:54:02,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:54:02,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:54:02,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:54:02,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:54:02,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:54:02,343 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:54:02,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:54:02,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:54:02,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:54:02,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:54:02,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:54:02,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:54:02,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:54:02,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:54:02,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:54:02,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:54:02,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:54:02,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:54:02,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:54:02,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:54:02,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:54:02,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:54:02,373 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:54:02,373 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:54:02,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:54:02,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:54:02,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:54:02,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:54:02,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:54:02,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:54:02,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:54:02,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:54:02,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:54:02,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:54:02,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:54:02,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:54:02,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:54:02,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:54:02,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 01:54:02,422 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:54:02,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:54:02,424 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:54:02,424 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:54:02,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:54:02,425 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:54:02,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:54:02,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:54:02,426 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:54:02,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:54:02,427 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:54:02,427 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:54:02,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:54:02,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:54:02,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:54:02,428 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:54:02,428 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:54:02,428 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:54:02,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:54:02,429 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:54:02,429 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 01:54:02,429 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 01:54:02,429 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:54:02,429 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:54:02,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:54:02,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:54:02,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:54:02,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:54:02,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:54:02,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:54:02,431 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 01:54:02,431 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 01:54:02,431 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:54:02,432 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:54:02,432 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:54:02,432 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 01:54:02,432 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:54:02,432 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:54:02,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:54:02,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:54:02,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:54:02,747 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:54:02,748 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:54:02,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-subst.wvr.c [2023-09-01 01:54:03,879 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:54:04,116 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:54:04,117 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-subst.wvr.c [2023-09-01 01:54:04,123 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d28d03ff3/ac721bc4a14649fb930bff53c5a78eba/FLAG3b1faf4fe [2023-09-01 01:54:04,145 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d28d03ff3/ac721bc4a14649fb930bff53c5a78eba [2023-09-01 01:54:04,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:54:04,149 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:54:04,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:54:04,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:54:04,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:54:04,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:54:04" (1/1) ... [2023-09-01 01:54:04,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@494aa9d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:04, skipping insertion in model container [2023-09-01 01:54:04,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:54:04" (1/1) ... [2023-09-01 01:54:04,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:54:04,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:54:04,385 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-subst.wvr.c[3345,3358] [2023-09-01 01:54:04,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:54:04,417 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 01:54:04,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:54:04,457 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-subst.wvr.c[3345,3358] [2023-09-01 01:54:04,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:54:04,464 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 01:54:04,499 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-subst.wvr.c[3345,3358] [2023-09-01 01:54:04,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:54:04,533 INFO L208 MainTranslator]: Completed translation [2023-09-01 01:54:04,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:04 WrapperNode [2023-09-01 01:54:04,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:54:04,535 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 01:54:04,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 01:54:04,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 01:54:04,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:04" (1/1) ... [2023-09-01 01:54:04,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:04" (1/1) ... [2023-09-01 01:54:04,591 INFO L138 Inliner]: procedures = 27, calls = 45, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 176 [2023-09-01 01:54:04,592 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 01:54:04,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 01:54:04,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 01:54:04,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 01:54:04,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:04" (1/1) ... [2023-09-01 01:54:04,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:04" (1/1) ... [2023-09-01 01:54:04,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:04" (1/1) ... [2023-09-01 01:54:04,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:04" (1/1) ... [2023-09-01 01:54:04,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:04" (1/1) ... [2023-09-01 01:54:04,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:04" (1/1) ... [2023-09-01 01:54:04,636 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:04" (1/1) ... [2023-09-01 01:54:04,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:04" (1/1) ... [2023-09-01 01:54:04,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 01:54:04,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 01:54:04,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 01:54:04,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 01:54:04,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:04" (1/1) ... [2023-09-01 01:54:04,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:54:04,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:54:04,709 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 01:54:04,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 01:54:04,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 01:54:04,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 01:54:04,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 01:54:04,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 01:54:04,749 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 01:54:04,750 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 01:54:04,750 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 01:54:04,750 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 01:54:04,750 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 01:54:04,750 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 01:54:04,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 01:54:04,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 01:54:04,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 01:54:04,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 01:54:04,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 01:54:04,752 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 01:54:04,886 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 01:54:04,901 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 01:54:05,696 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 01:54:05,704 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 01:54:05,704 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 01:54:05,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:54:05 BoogieIcfgContainer [2023-09-01 01:54:05,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 01:54:05,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 01:54:05,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 01:54:05,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 01:54:05,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:54:04" (1/3) ... [2023-09-01 01:54:05,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69727743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:54:05, skipping insertion in model container [2023-09-01 01:54:05,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:04" (2/3) ... [2023-09-01 01:54:05,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69727743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:54:05, skipping insertion in model container [2023-09-01 01:54:05,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:54:05" (3/3) ... [2023-09-01 01:54:05,715 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2023-09-01 01:54:05,730 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 01:54:05,730 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-09-01 01:54:05,730 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 01:54:05,865 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 01:54:05,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 315 places, 334 transitions, 692 flow [2023-09-01 01:54:06,050 INFO L130 PetriNetUnfolder]: 29/331 cut-off events. [2023-09-01 01:54:06,050 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:54:06,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 331 events. 29/331 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 629 event pairs, 0 based on Foata normal form. 0/258 useless extension candidates. Maximal degree in co-relation 252. Up to 3 conditions per place. [2023-09-01 01:54:06,059 INFO L82 GeneralOperation]: Start removeDead. Operand has 315 places, 334 transitions, 692 flow [2023-09-01 01:54:06,071 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 308 places, 327 transitions, 672 flow [2023-09-01 01:54:06,075 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 01:54:06,095 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 308 places, 327 transitions, 672 flow [2023-09-01 01:54:06,098 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 308 places, 327 transitions, 672 flow [2023-09-01 01:54:06,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 327 transitions, 672 flow [2023-09-01 01:54:06,164 INFO L130 PetriNetUnfolder]: 29/327 cut-off events. [2023-09-01 01:54:06,164 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:54:06,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 327 events. 29/327 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 622 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 252. Up to 3 conditions per place. [2023-09-01 01:54:06,176 INFO L119 LiptonReduction]: Number of co-enabled transitions 12768 [2023-09-01 01:54:36,987 INFO L134 LiptonReduction]: Checked pairs total: 23911 [2023-09-01 01:54:36,988 INFO L136 LiptonReduction]: Total number of compositions: 372 [2023-09-01 01:54:37,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 01:54:37,005 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;@471307cd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 01:54:37,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-09-01 01:54:37,009 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 01:54:37,009 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:54:37,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:54:37,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:54:37,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:54:37,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:54:37,015 INFO L85 PathProgramCache]: Analyzing trace with hash 41712, now seen corresponding path program 1 times [2023-09-01 01:54:37,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:54:37,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790981779] [2023-09-01 01:54:37,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:54:37,026 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:54:37,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:54:37,029 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:54:37,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 01:54:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:54:37,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 01:54:37,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:54:37,271 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:54:37,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 01:54:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:54:37,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:54:37,302 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:54:37,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790981779] [2023-09-01 01:54:37,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790981779] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:54:37,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:54:37,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:54:37,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145494105] [2023-09-01 01:54:37,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:54:37,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:54:37,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:54:37,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:54:37,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:54:37,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 706 [2023-09-01 01:54:37,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 298.6666666666667) internal successors, (896), 3 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:54:37,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:54:37,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 706 [2023-09-01 01:54:37,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:54:41,042 INFO L130 PetriNetUnfolder]: 20232/26991 cut-off events. [2023-09-01 01:54:41,043 INFO L131 PetriNetUnfolder]: For 482/482 co-relation queries the response was YES. [2023-09-01 01:54:41,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54515 conditions, 26991 events. 20232/26991 cut-off events. For 482/482 co-relation queries the response was YES. Maximal size of possible extension queue 1370. Compared 142094 event pairs, 15757 based on Foata normal form. 0/8337 useless extension candidates. Maximal degree in co-relation 51676. Up to 26991 conditions per place. [2023-09-01 01:54:41,229 INFO L137 encePairwiseOnDemand]: 697/706 looper letters, 73 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-09-01 01:54:41,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 74 transitions, 314 flow [2023-09-01 01:54:41,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:54:41,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:54:41,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 976 transitions. [2023-09-01 01:54:41,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46081208687440983 [2023-09-01 01:54:41,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 976 transitions. [2023-09-01 01:54:41,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 976 transitions. [2023-09-01 01:54:41,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:54:41,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 976 transitions. [2023-09-01 01:54:41,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.3333333333333) internal successors, (976), 3 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:54:41,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:54:41,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:54:41,274 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 182 flow. Second operand 3 states and 976 transitions. [2023-09-01 01:54:41,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 74 transitions, 314 flow [2023-09-01 01:54:41,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 74 transitions, 302 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 01:54:41,297 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 156 flow [2023-09-01 01:54:41,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=67, 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=156, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2023-09-01 01:54:41,304 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -12 predicate places. [2023-09-01 01:54:41,305 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 156 flow [2023-09-01 01:54:41,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 298.6666666666667) internal successors, (896), 3 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:54:41,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:54:41,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:54:41,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 01:54:41,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:54:41,520 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:54:41,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:54:41,521 INFO L85 PathProgramCache]: Analyzing trace with hash 41711, now seen corresponding path program 1 times [2023-09-01 01:54:41,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:54:41,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715373172] [2023-09-01 01:54:41,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:54:41,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:54:41,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:54:41,523 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:54:41,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 01:54:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:54:41,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:54:41,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:54:41,735 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 01:54:41,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 01:54:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:54:41,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:54:41,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:54:41,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715373172] [2023-09-01 01:54:41,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715373172] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:54:41,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:54:41,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:54:41,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287980274] [2023-09-01 01:54:41,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:54:41,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:54:41,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:54:41,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:54:41,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:54:42,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 706 [2023-09-01 01:54:42,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 298.6666666666667) internal successors, (896), 3 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:54:42,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:54:42,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 706 [2023-09-01 01:54:42,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:54:46,967 INFO L130 PetriNetUnfolder]: 40463/53978 cut-off events. [2023-09-01 01:54:46,967 INFO L131 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2023-09-01 01:54:47,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108382 conditions, 53978 events. 40463/53978 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 2478. Compared 308556 event pairs, 31514 based on Foata normal form. 0/16673 useless extension candidates. Maximal degree in co-relation 108376. Up to 26992 conditions per place. [2023-09-01 01:54:47,261 INFO L137 encePairwiseOnDemand]: 697/706 looper letters, 138 selfloop transitions, 6 changer transitions 0/144 dead transitions. [2023-09-01 01:54:47,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 144 transitions, 590 flow [2023-09-01 01:54:47,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:54:47,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:54:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1041 transitions. [2023-09-01 01:54:47,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4915014164305949 [2023-09-01 01:54:47,265 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1041 transitions. [2023-09-01 01:54:47,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1041 transitions. [2023-09-01 01:54:47,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:54:47,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1041 transitions. [2023-09-01 01:54:47,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 347.0) internal successors, (1041), 3 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:54:47,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:54:47,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:54:47,275 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 156 flow. Second operand 3 states and 1041 transitions. [2023-09-01 01:54:47,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 144 transitions, 590 flow [2023-09-01 01:54:47,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 144 transitions, 589 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:54:47,280 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 205 flow [2023-09-01 01:54:47,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2023-09-01 01:54:47,281 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -9 predicate places. [2023-09-01 01:54:47,281 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 205 flow [2023-09-01 01:54:47,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 298.6666666666667) internal successors, (896), 3 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:54:47,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:54:47,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:54:47,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 01:54:47,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:54:47,492 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:54:47,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:54:47,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1298296, now seen corresponding path program 1 times [2023-09-01 01:54:47,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:54:47,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875572029] [2023-09-01 01:54:47,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:54:47,493 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:54:47,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:54:47,495 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:54:47,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 01:54:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:54:47,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:54:47,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:54:47,660 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 01:54:47,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 01:54:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:54:47,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:54:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:54:48,093 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:54:48,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875572029] [2023-09-01 01:54:48,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875572029] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:54:48,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:54:48,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 01:54:48,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763745472] [2023-09-01 01:54:48,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:54:48,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:54:48,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:54:48,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:54:48,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:54:49,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 706 [2023-09-01 01:54:49,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 205 flow. Second operand has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:54:49,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:54:49,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 706 [2023-09-01 01:54:49,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:54:58,022 INFO L130 PetriNetUnfolder]: 60704/80981 cut-off events. [2023-09-01 01:54:58,022 INFO L131 PetriNetUnfolder]: For 270/270 co-relation queries the response was YES. [2023-09-01 01:54:58,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162641 conditions, 80981 events. 60704/80981 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 3593. Compared 484956 event pairs, 47271 based on Foata normal form. 0/25030 useless extension candidates. Maximal degree in co-relation 162632. Up to 26993 conditions per place. [2023-09-01 01:54:58,405 INFO L137 encePairwiseOnDemand]: 694/706 looper letters, 203 selfloop transitions, 27 changer transitions 0/230 dead transitions. [2023-09-01 01:54:58,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 230 transitions, 1021 flow [2023-09-01 01:54:58,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:54:58,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:54:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1937 transitions. [2023-09-01 01:54:58,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4572710103871577 [2023-09-01 01:54:58,412 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1937 transitions. [2023-09-01 01:54:58,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1937 transitions. [2023-09-01 01:54:58,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:54:58,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1937 transitions. [2023-09-01 01:54:58,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 322.8333333333333) internal successors, (1937), 6 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:54:58,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 706.0) internal successors, (4942), 7 states have internal predecessors, (4942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:54:58,427 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 706.0) internal successors, (4942), 7 states have internal predecessors, (4942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:54:58,427 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 205 flow. Second operand 6 states and 1937 transitions. [2023-09-01 01:54:58,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 230 transitions, 1021 flow [2023-09-01 01:54:58,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 230 transitions, 997 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:54:58,438 INFO L231 Difference]: Finished difference. Result has 79 places, 100 transitions, 397 flow [2023-09-01 01:54:58,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=397, PETRI_PLACES=79, PETRI_TRANSITIONS=100} [2023-09-01 01:54:58,439 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -2 predicate places. [2023-09-01 01:54:58,440 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 100 transitions, 397 flow [2023-09-01 01:54:58,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:54:58,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:54:58,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 01:54:58,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-09-01 01:54:58,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:54:58,650 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:54:58,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:54:58,650 INFO L85 PathProgramCache]: Analyzing trace with hash 40325919, now seen corresponding path program 1 times [2023-09-01 01:54:58,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:54:58,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462722886] [2023-09-01 01:54:58,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:54:58,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:54:58,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:54:58,652 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:54:58,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 01:54:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:54:58,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:54:58,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:54:58,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:54:58,861 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-09-01 01:54:58,861 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 01:54:58,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:54:58,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:54:59,039 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:54:59,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:54:59,054 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 01:54:59,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:54:59,055 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:54:59,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462722886] [2023-09-01 01:54:59,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462722886] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:54:59,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:54:59,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:54:59,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739125394] [2023-09-01 01:54:59,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:54:59,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:54:59,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:54:59,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:54:59,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:54:59,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 706 [2023-09-01 01:54:59,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 100 transitions, 397 flow. Second operand has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:54:59,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:54:59,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 706 [2023-09-01 01:54:59,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:55:04,489 INFO L130 PetriNetUnfolder]: 46590/62748 cut-off events. [2023-09-01 01:55:04,490 INFO L131 PetriNetUnfolder]: For 278/278 co-relation queries the response was YES. [2023-09-01 01:55:04,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126237 conditions, 62748 events. 46590/62748 cut-off events. For 278/278 co-relation queries the response was YES. Maximal size of possible extension queue 2914. Compared 375569 event pairs, 36099 based on Foata normal form. 0/20915 useless extension candidates. Maximal degree in co-relation 126224. Up to 62748 conditions per place. [2023-09-01 01:55:04,774 INFO L137 encePairwiseOnDemand]: 703/706 looper letters, 95 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2023-09-01 01:55:04,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 96 transitions, 569 flow [2023-09-01 01:55:04,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:55:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:55:04,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 989 transitions. [2023-09-01 01:55:04,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669499527856468 [2023-09-01 01:55:04,782 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 989 transitions. [2023-09-01 01:55:04,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 989 transitions. [2023-09-01 01:55:04,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:55:04,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 989 transitions. [2023-09-01 01:55:04,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:04,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:04,794 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:04,794 INFO L175 Difference]: Start difference. First operand has 79 places, 100 transitions, 397 flow. Second operand 3 states and 989 transitions. [2023-09-01 01:55:04,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 96 transitions, 569 flow [2023-09-01 01:55:04,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 96 transitions, 539 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 01:55:04,800 INFO L231 Difference]: Finished difference. Result has 78 places, 96 transitions, 349 flow [2023-09-01 01:55:04,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=349, PETRI_PLACES=78, PETRI_TRANSITIONS=96} [2023-09-01 01:55:04,803 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -3 predicate places. [2023-09-01 01:55:04,803 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 96 transitions, 349 flow [2023-09-01 01:55:04,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:04,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:55:04,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 01:55:04,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 01:55:05,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:55:05,015 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:55:05,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:55:05,015 INFO L85 PathProgramCache]: Analyzing trace with hash 40325918, now seen corresponding path program 1 times [2023-09-01 01:55:05,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:55:05,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481657695] [2023-09-01 01:55:05,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:55:05,016 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:55:05,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:55:05,017 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:55:05,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 01:55:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:55:05,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:55:05,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:55:05,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:55:05,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:55:05,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:55:05,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:55:05,226 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 01:55:05,227 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 01:55:05,255 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 01:55:05,256 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 01:55:05,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:55:05,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:55:05,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:55:05,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:55:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:55:05,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:55:05,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:55:05,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481657695] [2023-09-01 01:55:05,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481657695] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:55:05,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:55:05,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:55:05,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262775784] [2023-09-01 01:55:05,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:55:05,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:55:05,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:55:05,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:55:05,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:55:05,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 706 [2023-09-01 01:55:05,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 96 transitions, 349 flow. Second operand has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:05,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:55:05,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 706 [2023-09-01 01:55:05,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:55:09,241 INFO L130 PetriNetUnfolder]: 32476/44515 cut-off events. [2023-09-01 01:55:09,241 INFO L131 PetriNetUnfolder]: For 282/282 co-relation queries the response was YES. [2023-09-01 01:55:09,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89745 conditions, 44515 events. 32476/44515 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 2077. Compared 266190 event pairs, 24927 based on Foata normal form. 0/16799 useless extension candidates. Maximal degree in co-relation 89731. Up to 44515 conditions per place. [2023-09-01 01:55:09,468 INFO L137 encePairwiseOnDemand]: 703/706 looper letters, 91 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2023-09-01 01:55:09,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 513 flow [2023-09-01 01:55:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:55:09,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:55:09,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 987 transitions. [2023-09-01 01:55:09,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4660056657223796 [2023-09-01 01:55:09,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 987 transitions. [2023-09-01 01:55:09,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 987 transitions. [2023-09-01 01:55:09,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:55:09,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 987 transitions. [2023-09-01 01:55:09,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 329.0) internal successors, (987), 3 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:09,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:09,484 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:09,484 INFO L175 Difference]: Start difference. First operand has 78 places, 96 transitions, 349 flow. Second operand 3 states and 987 transitions. [2023-09-01 01:55:09,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 513 flow [2023-09-01 01:55:09,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 92 transitions, 512 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:55:09,490 INFO L231 Difference]: Finished difference. Result has 77 places, 92 transitions, 330 flow [2023-09-01 01:55:09,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=330, PETRI_PLACES=77, PETRI_TRANSITIONS=92} [2023-09-01 01:55:09,492 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -4 predicate places. [2023-09-01 01:55:09,493 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 92 transitions, 330 flow [2023-09-01 01:55:09,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:09,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:55:09,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 01:55:09,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 01:55:09,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:55:09,707 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:55:09,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:55:09,707 INFO L85 PathProgramCache]: Analyzing trace with hash 98529700, now seen corresponding path program 1 times [2023-09-01 01:55:09,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:55:09,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056881503] [2023-09-01 01:55:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:55:09,708 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:55:09,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:55:09,710 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:55:09,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 01:55:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:55:09,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 01:55:09,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:55:09,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:55:09,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:55:09,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:55:09,903 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:55:09,903 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 01:55:09,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 01:55:09,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:55:09,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:55:09,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:55:10,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:55:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:55:10,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:55:10,065 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:55:10,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056881503] [2023-09-01 01:55:10,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056881503] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:55:10,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:55:10,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:55:10,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561477358] [2023-09-01 01:55:10,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:55:10,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:55:10,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:55:10,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:55:10,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:55:10,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 706 [2023-09-01 01:55:10,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 92 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 306.5) internal successors, (1226), 4 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:10,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:55:10,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 706 [2023-09-01 01:55:10,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:55:13,803 INFO L130 PetriNetUnfolder]: 31756/43459 cut-off events. [2023-09-01 01:55:13,804 INFO L131 PetriNetUnfolder]: For 282/282 co-relation queries the response was YES. [2023-09-01 01:55:13,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87634 conditions, 43459 events. 31756/43459 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 2022. Compared 258291 event pairs, 24363 based on Foata normal form. 0/16595 useless extension candidates. Maximal degree in co-relation 87619. Up to 43459 conditions per place. [2023-09-01 01:55:13,980 INFO L137 encePairwiseOnDemand]: 703/706 looper letters, 89 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2023-09-01 01:55:13,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 90 transitions, 506 flow [2023-09-01 01:55:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:55:13,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:55:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 985 transitions. [2023-09-01 01:55:13,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46506137865911235 [2023-09-01 01:55:13,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 985 transitions. [2023-09-01 01:55:13,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 985 transitions. [2023-09-01 01:55:13,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:55:13,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 985 transitions. [2023-09-01 01:55:13,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:13,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:13,989 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:13,989 INFO L175 Difference]: Start difference. First operand has 77 places, 92 transitions, 330 flow. Second operand 3 states and 985 transitions. [2023-09-01 01:55:13,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 90 transitions, 506 flow [2023-09-01 01:55:13,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 90 transitions, 505 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:55:13,991 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 327 flow [2023-09-01 01:55:13,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=327, PETRI_PLACES=76, PETRI_TRANSITIONS=90} [2023-09-01 01:55:13,992 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -5 predicate places. [2023-09-01 01:55:13,992 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 327 flow [2023-09-01 01:55:13,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 306.5) internal successors, (1226), 4 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:13,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:55:13,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 01:55:14,000 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 (7)] Ended with exit code 0 [2023-09-01 01:55:14,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:55:14,197 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:55:14,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:55:14,197 INFO L85 PathProgramCache]: Analyzing trace with hash 98529699, now seen corresponding path program 1 times [2023-09-01 01:55:14,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:55:14,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358416270] [2023-09-01 01:55:14,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:55:14,198 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:55:14,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:55:14,199 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:55:14,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 01:55:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:55:14,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:55:14,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:55:14,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:55:14,370 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-09-01 01:55:14,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-09-01 01:55:14,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:55:14,605 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-09-01 01:55:14,605 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 01:55:14,762 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-09-01 01:55:14,762 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 01:55:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:55:14,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:55:14,877 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:55:14,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358416270] [2023-09-01 01:55:14,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358416270] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:55:14,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:55:14,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:55:14,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842190484] [2023-09-01 01:55:14,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:55:14,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:55:14,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:55:14,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:55:14,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:55:15,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 706 [2023-09-01 01:55:15,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 306.5) internal successors, (1226), 4 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:15,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:55:15,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 706 [2023-09-01 01:55:15,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:55:19,046 INFO L130 PetriNetUnfolder]: 31036/42403 cut-off events. [2023-09-01 01:55:19,046 INFO L131 PetriNetUnfolder]: For 282/282 co-relation queries the response was YES. [2023-09-01 01:55:19,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85523 conditions, 42403 events. 31036/42403 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 1967. Compared 250489 event pairs, 23799 based on Foata normal form. 0/16391 useless extension candidates. Maximal degree in co-relation 85507. Up to 42403 conditions per place. [2023-09-01 01:55:19,225 INFO L137 encePairwiseOnDemand]: 703/706 looper letters, 87 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2023-09-01 01:55:19,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 88 transitions, 499 flow [2023-09-01 01:55:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:55:19,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:55:19,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 983 transitions. [2023-09-01 01:55:19,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46411709159584513 [2023-09-01 01:55:19,228 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 983 transitions. [2023-09-01 01:55:19,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 983 transitions. [2023-09-01 01:55:19,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:55:19,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 983 transitions. [2023-09-01 01:55:19,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.6666666666667) internal successors, (983), 3 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:19,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:19,234 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:19,234 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 327 flow. Second operand 3 states and 983 transitions. [2023-09-01 01:55:19,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 88 transitions, 499 flow [2023-09-01 01:55:19,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 88 transitions, 498 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:55:19,237 INFO L231 Difference]: Finished difference. Result has 75 places, 88 transitions, 324 flow [2023-09-01 01:55:19,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=75, PETRI_TRANSITIONS=88} [2023-09-01 01:55:19,238 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -6 predicate places. [2023-09-01 01:55:19,238 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 88 transitions, 324 flow [2023-09-01 01:55:19,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 306.5) internal successors, (1226), 4 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:19,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:55:19,239 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 01:55:19,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 01:55:19,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:55:19,448 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:55:19,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:55:19,448 INFO L85 PathProgramCache]: Analyzing trace with hash 28048687, now seen corresponding path program 2 times [2023-09-01 01:55:19,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:55:19,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045414689] [2023-09-01 01:55:19,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:55:19,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:55:19,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:55:19,450 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:55:19,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 01:55:19,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:55:19,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:55:19,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:55:19,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:55:19,623 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 01:55:19,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 01:55:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:55:19,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:55:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:55:20,406 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:55:20,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045414689] [2023-09-01 01:55:20,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045414689] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:55:20,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:55:20,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:55:20,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413123579] [2023-09-01 01:55:20,407 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:55:20,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:55:20,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:55:20,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:55:20,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:55:26,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 706 [2023-09-01 01:55:26,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 88 transitions, 324 flow. Second operand has 12 states, 12 states have (on average 287.0) internal successors, (3444), 12 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:26,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:55:26,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 706 [2023-09-01 01:55:26,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:55:28,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:55:30,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:55:32,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:55:34,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:55:36,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:55:38,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:55:40,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:55:42,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:55:43,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:55:45,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:55:46,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:55:48,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:55:51,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:56:08,312 INFO L130 PetriNetUnfolder]: 103433/141303 cut-off events. [2023-09-01 01:56:08,312 INFO L131 PetriNetUnfolder]: For 963/963 co-relation queries the response was YES. [2023-09-01 01:56:08,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284889 conditions, 141303 events. 103433/141303 cut-off events. For 963/963 co-relation queries the response was YES. Maximal size of possible extension queue 4102. Compared 922206 event pairs, 79330 based on Foata normal form. 12/54602 useless extension candidates. Maximal degree in co-relation 284872. Up to 14146 conditions per place. [2023-09-01 01:56:09,079 INFO L137 encePairwiseOnDemand]: 696/706 looper letters, 580 selfloop transitions, 53 changer transitions 0/633 dead transitions. [2023-09-01 01:56:09,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 633 transitions, 2918 flow [2023-09-01 01:56:09,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 01:56:09,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 01:56:09,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 5507 transitions. [2023-09-01 01:56:09,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588401933011165 [2023-09-01 01:56:09,099 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 5507 transitions. [2023-09-01 01:56:09,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 5507 transitions. [2023-09-01 01:56:09,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:56:09,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 5507 transitions. [2023-09-01 01:56:09,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 323.94117647058823) internal successors, (5507), 17 states have internal predecessors, (5507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:56:09,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 706.0) internal successors, (12708), 18 states have internal predecessors, (12708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:56:09,131 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 706.0) internal successors, (12708), 18 states have internal predecessors, (12708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:56:09,131 INFO L175 Difference]: Start difference. First operand has 75 places, 88 transitions, 324 flow. Second operand 17 states and 5507 transitions. [2023-09-01 01:56:09,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 633 transitions, 2918 flow [2023-09-01 01:56:09,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 633 transitions, 2917 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:56:09,140 INFO L231 Difference]: Finished difference. Result has 96 places, 122 transitions, 704 flow [2023-09-01 01:56:09,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=704, PETRI_PLACES=96, PETRI_TRANSITIONS=122} [2023-09-01 01:56:09,140 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 15 predicate places. [2023-09-01 01:56:09,141 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 122 transitions, 704 flow [2023-09-01 01:56:09,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 287.0) internal successors, (3444), 12 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:56:09,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:56:09,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:56:09,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 01:56:09,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:56:09,351 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:56:09,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:56:09,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1240547096, now seen corresponding path program 1 times [2023-09-01 01:56:09,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:56:09,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36311852] [2023-09-01 01:56:09,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:56:09,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:56:09,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:56:09,353 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:56:09,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 01:56:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:56:09,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:56:09,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:56:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:56:09,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:56:09,511 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:56:09,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36311852] [2023-09-01 01:56:09,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36311852] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:56:09,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:56:09,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:56:09,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745206887] [2023-09-01 01:56:09,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:56:09,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:56:09,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:56:09,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:56:09,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:56:09,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 706 [2023-09-01 01:56:09,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 122 transitions, 704 flow. Second operand has 5 states, 5 states have (on average 297.4) internal successors, (1487), 5 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:56:09,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:56:09,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 706 [2023-09-01 01:56:09,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:56:26,335 INFO L130 PetriNetUnfolder]: 137234/189822 cut-off events. [2023-09-01 01:56:26,336 INFO L131 PetriNetUnfolder]: For 2019/2019 co-relation queries the response was YES. [2023-09-01 01:56:26,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382828 conditions, 189822 events. 137234/189822 cut-off events. For 2019/2019 co-relation queries the response was YES. Maximal size of possible extension queue 5315. Compared 1324781 event pairs, 91700 based on Foata normal form. 0/77612 useless extension candidates. Maximal degree in co-relation 382804. Up to 141302 conditions per place. [2023-09-01 01:56:27,522 INFO L137 encePairwiseOnDemand]: 697/706 looper letters, 242 selfloop transitions, 4 changer transitions 0/246 dead transitions. [2023-09-01 01:56:27,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 246 transitions, 1732 flow [2023-09-01 01:56:27,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:56:27,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:56:27,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1641 transitions. [2023-09-01 01:56:27,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46487252124645895 [2023-09-01 01:56:27,526 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1641 transitions. [2023-09-01 01:56:27,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1641 transitions. [2023-09-01 01:56:27,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:56:27,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1641 transitions. [2023-09-01 01:56:27,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 328.2) internal successors, (1641), 5 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:56:27,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 706.0) internal successors, (4236), 6 states have internal predecessors, (4236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:56:27,536 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 706.0) internal successors, (4236), 6 states have internal predecessors, (4236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:56:27,536 INFO L175 Difference]: Start difference. First operand has 96 places, 122 transitions, 704 flow. Second operand 5 states and 1641 transitions. [2023-09-01 01:56:27,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 246 transitions, 1732 flow [2023-09-01 01:56:27,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 246 transitions, 1569 flow, removed 37 selfloop flow, removed 4 redundant places. [2023-09-01 01:56:27,543 INFO L231 Difference]: Finished difference. Result has 98 places, 123 transitions, 626 flow [2023-09-01 01:56:27,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=626, PETRI_PLACES=98, PETRI_TRANSITIONS=123} [2023-09-01 01:56:27,544 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 17 predicate places. [2023-09-01 01:56:27,544 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 123 transitions, 626 flow [2023-09-01 01:56:27,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 297.4) internal successors, (1487), 5 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:56:27,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:56:27,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:56:27,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 01:56:27,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:56:27,755 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:56:27,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:56:27,755 INFO L85 PathProgramCache]: Analyzing trace with hash 197788540, now seen corresponding path program 1 times [2023-09-01 01:56:27,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:56:27,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667641949] [2023-09-01 01:56:27,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:56:27,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:56:27,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:56:27,757 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:56:27,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 01:56:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:56:27,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:56:27,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:56:27,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:56:27,973 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-09-01 01:56:27,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2023-09-01 01:56:28,001 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 130 treesize of output 126 [2023-09-01 01:56:28,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:56:28,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:56:28,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:56:28,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:56:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:56:28,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:56:28,193 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:56:28,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667641949] [2023-09-01 01:56:28,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667641949] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:56:28,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:56:28,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:56:28,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689751907] [2023-09-01 01:56:28,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:56:28,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:56:28,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:56:28,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:56:28,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:56:28,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 706 [2023-09-01 01:56:28,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 123 transitions, 626 flow. Second operand has 5 states, 5 states have (on average 304.6) internal successors, (1523), 5 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:56:28,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:56:28,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 706 [2023-09-01 01:56:28,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:56:44,539 INFO L130 PetriNetUnfolder]: 131454/181312 cut-off events. [2023-09-01 01:56:44,540 INFO L131 PetriNetUnfolder]: For 14926/14926 co-relation queries the response was YES. [2023-09-01 01:56:44,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384917 conditions, 181312 events. 131454/181312 cut-off events. For 14926/14926 co-relation queries the response was YES. Maximal size of possible extension queue 5108. Compared 1241191 event pairs, 101840 based on Foata normal form. 0/82882 useless extension candidates. Maximal degree in co-relation 384890. Up to 181312 conditions per place. [2023-09-01 01:56:45,508 INFO L137 encePairwiseOnDemand]: 703/706 looper letters, 120 selfloop transitions, 1 changer transitions 0/121 dead transitions. [2023-09-01 01:56:45,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 121 transitions, 864 flow [2023-09-01 01:56:45,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:56:45,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:56:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 975 transitions. [2023-09-01 01:56:45,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603399433427762 [2023-09-01 01:56:45,512 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 975 transitions. [2023-09-01 01:56:45,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 975 transitions. [2023-09-01 01:56:45,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:56:45,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 975 transitions. [2023-09-01 01:56:45,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:56:45,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:56:45,518 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:56:45,518 INFO L175 Difference]: Start difference. First operand has 98 places, 123 transitions, 626 flow. Second operand 3 states and 975 transitions. [2023-09-01 01:56:45,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 121 transitions, 864 flow [2023-09-01 01:56:45,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 121 transitions, 858 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 01:56:45,635 INFO L231 Difference]: Finished difference. Result has 97 places, 121 transitions, 618 flow [2023-09-01 01:56:45,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=618, PETRI_PLACES=97, PETRI_TRANSITIONS=121} [2023-09-01 01:56:45,637 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 16 predicate places. [2023-09-01 01:56:45,637 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 121 transitions, 618 flow [2023-09-01 01:56:45,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 304.6) internal successors, (1523), 5 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:56:45,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:56:45,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:56:45,646 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 (11)] Ended with exit code 0 [2023-09-01 01:56:45,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:56:45,841 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:56:45,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:56:45,842 INFO L85 PathProgramCache]: Analyzing trace with hash -924909122, now seen corresponding path program 1 times [2023-09-01 01:56:45,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:56:45,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826679478] [2023-09-01 01:56:45,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:56:45,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:56:45,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:56:45,843 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:56:46,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 01:56:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:56:46,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:56:46,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:56:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:56:46,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:56:46,186 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:56:46,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826679478] [2023-09-01 01:56:46,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826679478] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:56:46,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:56:46,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:56:46,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440110090] [2023-09-01 01:56:46,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:56:46,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:56:46,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:56:46,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:56:46,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:56:46,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 706 [2023-09-01 01:56:46,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 121 transitions, 618 flow. Second operand has 5 states, 5 states have (on average 297.6) internal successors, (1488), 5 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:56:46,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:56:46,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 706 [2023-09-01 01:56:46,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand