./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.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 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:57:17,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:57:17,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:57:17,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:57:17,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:57:17,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:57:17,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:57:17,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:57:17,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:57:17,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:57:17,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:57:17,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:57:17,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:57:17,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:57:17,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:57:17,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:57:17,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:57:17,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:57:17,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:57:17,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:57:17,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:57:17,397 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:57:17,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:57:17,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:57:17,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:57:17,406 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:57:17,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:57:17,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:57:17,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:57:17,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:57:17,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:57:17,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:57:17,416 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:57:17,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:57:17,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:57:17,418 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:57:17,419 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:57:17,419 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:57:17,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:57:17,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:57:17,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:57:17,422 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:57:17,455 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:57:17,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:57:17,456 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:57:17,456 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:57:17,457 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:57:17,457 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:57:17,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:57:17,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:57:17,458 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:57:17,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:57:17,459 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:57:17,459 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:57:17,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:57:17,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:57:17,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:57:17,460 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:57:17,460 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:57:17,460 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:57:17,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:57:17,461 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:57:17,461 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:57:17,461 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:57:17,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:57:17,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:57:17,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:57:17,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:57:17,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:57:17,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:57:17,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:57:17,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:57:17,463 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:57:17,463 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:57:17,463 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:57:17,464 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:57:17,464 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:57:17,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:57:17,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:57:17,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:57:17,774 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:57:17,775 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:57:17,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-08-29 23:57:18,928 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:57:19,128 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:57:19,128 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-08-29 23:57:19,134 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/396a93d99/39284d3cfcb448dfa18eea775dc237f4/FLAG74a0a438b [2023-08-29 23:57:19,144 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/396a93d99/39284d3cfcb448dfa18eea775dc237f4 [2023-08-29 23:57:19,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:57:19,147 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:57:19,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:57:19,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:57:19,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:57:19,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:57:19" (1/1) ... [2023-08-29 23:57:19,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@478fbf85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:19, skipping insertion in model container [2023-08-29 23:57:19,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:57:19" (1/1) ... [2023-08-29 23:57:19,157 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:57:19,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:57:19,293 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2023-08-29 23:57:19,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:57:19,310 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) [2023-08-29 23:57:19,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@78af535a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:19, skipping insertion in model container [2023-08-29 23:57:19,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:57:19,311 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 23:57:19,312 INFO L158 Benchmark]: Toolchain (without parser) took 164.60ms. Allocated memory is still 75.5MB. Free memory was 53.7MB in the beginning and 43.8MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:57:19,313 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 60.8MB. Free memory is still 38.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 23:57:19,313 INFO L158 Benchmark]: CACSL2BoogieTranslator took 162.88ms. Allocated memory is still 75.5MB. Free memory was 53.3MB in the beginning and 43.8MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:57:19,314 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 60.8MB. Free memory is still 38.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 162.88ms. Allocated memory is still 75.5MB. Free memory was 53.3MB in the beginning and 43.8MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 100]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.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 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:57:20,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:57:20,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:57:20,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:57:20,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:57:20,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:57:20,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:57:20,955 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:57:20,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:57:20,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:57:20,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:57:20,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:57:20,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:57:20,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:57:20,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:57:20,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:57:20,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:57:20,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:57:20,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:57:20,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:57:20,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:57:20,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:57:20,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:57:20,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:57:20,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:57:20,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:57:20,994 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:57:20,995 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:57:20,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:57:20,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:57:20,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:57:21,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:57:21,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:57:21,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:57:21,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:57:21,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:57:21,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:57:21,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:57:21,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:57:21,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:57:21,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:57:21,007 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 23:57:21,034 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:57:21,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:57:21,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:57:21,035 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:57:21,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:57:21,036 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:57:21,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:57:21,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:57:21,037 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:57:21,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:57:21,038 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:57:21,038 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:57:21,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:57:21,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:57:21,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:57:21,039 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:57:21,039 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:57:21,039 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:57:21,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:57:21,040 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:57:21,040 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 23:57:21,040 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 23:57:21,040 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:57:21,040 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:57:21,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:57:21,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:57:21,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:57:21,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:57:21,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:57:21,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:57:21,042 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 23:57:21,042 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 23:57:21,042 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:57:21,042 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:57:21,043 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:57:21,043 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 23:57:21,043 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:57:21,043 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:57:21,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:57:21,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:57:21,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:57:21,366 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:57:21,366 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:57:21,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-08-29 23:57:22,496 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:57:22,680 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:57:22,681 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-08-29 23:57:22,686 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e06643d40/54b1bf0c79a6444abaefd1e2e16b4b7d/FLAGf815a01da [2023-08-29 23:57:22,698 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e06643d40/54b1bf0c79a6444abaefd1e2e16b4b7d [2023-08-29 23:57:22,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:57:22,706 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:57:22,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:57:22,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:57:22,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:57:22,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:57:22" (1/1) ... [2023-08-29 23:57:22,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cbe4bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:22, skipping insertion in model container [2023-08-29 23:57:22,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:57:22" (1/1) ... [2023-08-29 23:57:22,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:57:22,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:57:22,907 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2023-08-29 23:57:22,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:57:22,938 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 23:57:22,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:57:22,969 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2023-08-29 23:57:22,979 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:57:22,986 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:57:23,016 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2023-08-29 23:57:23,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:57:23,042 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:57:23,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:23 WrapperNode [2023-08-29 23:57:23,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:57:23,043 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:57:23,043 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:57:23,044 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:57:23,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:23" (1/1) ... [2023-08-29 23:57:23,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:23" (1/1) ... [2023-08-29 23:57:23,136 INFO L138 Inliner]: procedures = 28, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 266 [2023-08-29 23:57:23,138 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:57:23,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:57:23,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:57:23,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:57:23,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:23" (1/1) ... [2023-08-29 23:57:23,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:23" (1/1) ... [2023-08-29 23:57:23,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:23" (1/1) ... [2023-08-29 23:57:23,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:23" (1/1) ... [2023-08-29 23:57:23,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:23" (1/1) ... [2023-08-29 23:57:23,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:23" (1/1) ... [2023-08-29 23:57:23,166 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:23" (1/1) ... [2023-08-29 23:57:23,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:23" (1/1) ... [2023-08-29 23:57:23,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:57:23,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:57:23,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:57:23,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:57:23,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:23" (1/1) ... [2023-08-29 23:57:23,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:57:23,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:57:23,213 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) [2023-08-29 23:57:23,217 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 [2023-08-29 23:57:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:57:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 23:57:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:57:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 23:57:23,248 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:57:23,248 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:57:23,248 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:57:23,248 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:57:23,248 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 23:57:23,248 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 23:57:23,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 23:57:23,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:57:23,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:57:23,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:57:23,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 23:57:23,249 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:57:23,369 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:57:23,374 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:57:24,057 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:57:24,064 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:57:24,065 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-29 23:57:24,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:57:24 BoogieIcfgContainer [2023-08-29 23:57:24,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:57:24,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:57:24,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:57:24,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:57:24,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:57:22" (1/3) ... [2023-08-29 23:57:24,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5521a100 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:57:24, skipping insertion in model container [2023-08-29 23:57:24,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:23" (2/3) ... [2023-08-29 23:57:24,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5521a100 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:57:24, skipping insertion in model container [2023-08-29 23:57:24,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:57:24" (3/3) ... [2023-08-29 23:57:24,072 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2023-08-29 23:57:24,085 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:57:24,085 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-08-29 23:57:24,085 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:57:24,177 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 23:57:24,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 327 places, 346 transitions, 716 flow [2023-08-29 23:57:24,312 INFO L130 PetriNetUnfolder]: 29/343 cut-off events. [2023-08-29 23:57:24,312 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:57:24,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 343 events. 29/343 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 586 event pairs, 0 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 224. Up to 2 conditions per place. [2023-08-29 23:57:24,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 327 places, 346 transitions, 716 flow [2023-08-29 23:57:24,327 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 320 places, 339 transitions, 696 flow [2023-08-29 23:57:24,330 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:57:24,337 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 320 places, 339 transitions, 696 flow [2023-08-29 23:57:24,339 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 320 places, 339 transitions, 696 flow [2023-08-29 23:57:24,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 339 transitions, 696 flow [2023-08-29 23:57:24,414 INFO L130 PetriNetUnfolder]: 29/339 cut-off events. [2023-08-29 23:57:24,414 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:57:24,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 339 events. 29/339 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 584 event pairs, 0 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 224. Up to 2 conditions per place. [2023-08-29 23:57:24,426 INFO L119 LiptonReduction]: Number of co-enabled transitions 15754 [2023-08-29 23:57:56,517 INFO L134 LiptonReduction]: Checked pairs total: 16889 [2023-08-29 23:57:56,517 INFO L136 LiptonReduction]: Total number of compositions: 403 [2023-08-29 23:57:56,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:57:56,534 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;@74a48662, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:57:56,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-08-29 23:57:56,537 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 23:57:56,537 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:57:56,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:57:56,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:57:56,538 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 23:57:56,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:57:56,542 INFO L85 PathProgramCache]: Analyzing trace with hash 44088, now seen corresponding path program 1 times [2023-08-29 23:57:56,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:57:56,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922890304] [2023-08-29 23:57:56,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:57:56,552 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 [2023-08-29 23:57:56,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:57:56,561 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) [2023-08-29 23:57:56,564 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 [2023-08-29 23:57:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:57:56,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:57:56,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:57:56,800 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 23:57:56,801 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 [2023-08-29 23:57:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:56,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:57:56,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:57:56,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922890304] [2023-08-29 23:57:56,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922890304] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:57:56,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:57:56,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:57:56,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512388] [2023-08-29 23:57:56,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:57:56,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:57:56,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:57:56,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:57:56,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:57:57,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 749 [2023-08-29 23:57:57,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 301.6666666666667) internal successors, (905), 3 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:57,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:57:57,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 749 [2023-08-29 23:57:57,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:57:58,062 INFO L130 PetriNetUnfolder]: 4987/6234 cut-off events. [2023-08-29 23:57:58,062 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2023-08-29 23:57:58,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12564 conditions, 6234 events. 4987/6234 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 26953 event pairs, 2410 based on Foata normal form. 0/1472 useless extension candidates. Maximal degree in co-relation 10696. Up to 6208 conditions per place. [2023-08-29 23:57:58,097 INFO L137 encePairwiseOnDemand]: 742/749 looper letters, 49 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-08-29 23:57:58,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 53 transitions, 224 flow [2023-08-29 23:57:58,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:57:58,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:57:58,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 959 transitions. [2023-08-29 23:57:58,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42679127725856697 [2023-08-29 23:57:58,116 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 959 transitions. [2023-08-29 23:57:58,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 959 transitions. [2023-08-29 23:57:58,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:57:58,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 959 transitions. [2023-08-29 23:57:58,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:58,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:58,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:58,138 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 136 flow. Second operand 3 states and 959 transitions. [2023-08-29 23:57:58,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 53 transitions, 224 flow [2023-08-29 23:57:58,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 212 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 23:57:58,148 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 114 flow [2023-08-29 23:57:58,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2023-08-29 23:57:58,153 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -10 predicate places. [2023-08-29 23:57:58,153 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 114 flow [2023-08-29 23:57:58,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 301.6666666666667) internal successors, (905), 3 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:58,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:57:58,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:57:58,165 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 [2023-08-29 23:57:58,362 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 [2023-08-29 23:57:58,363 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 23:57:58,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:57:58,364 INFO L85 PathProgramCache]: Analyzing trace with hash 44089, now seen corresponding path program 1 times [2023-08-29 23:57:58,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:57:58,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517073280] [2023-08-29 23:57:58,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:57:58,364 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 [2023-08-29 23:57:58,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:57:58,370 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) [2023-08-29 23:57:58,372 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 [2023-08-29 23:57:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:57:58,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:57:58,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:57:58,622 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:57:58,623 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 [2023-08-29 23:57:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:58,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:57:58,651 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:57:58,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517073280] [2023-08-29 23:57:58,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517073280] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:57:58,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:57:58,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:57:58,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033309663] [2023-08-29 23:57:58,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:57:58,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:57:58,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:57:58,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:57:58,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:57:58,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 749 [2023-08-29 23:57:58,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 301.6666666666667) internal successors, (905), 3 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:58,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:57:58,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 749 [2023-08-29 23:57:58,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:58:00,690 INFO L130 PetriNetUnfolder]: 9895/12386 cut-off events. [2023-08-29 23:58:00,691 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 23:58:00,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24781 conditions, 12386 events. 9895/12386 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 1212. Compared 58465 event pairs, 4801 based on Foata normal form. 0/2946 useless extension candidates. Maximal degree in co-relation 24775. Up to 6204 conditions per place. [2023-08-29 23:58:00,748 INFO L137 encePairwiseOnDemand]: 740/749 looper letters, 90 selfloop transitions, 6 changer transitions 0/99 dead transitions. [2023-08-29 23:58:00,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 99 transitions, 404 flow [2023-08-29 23:58:00,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:58:00,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:58:00,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1002 transitions. [2023-08-29 23:58:00,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4459279038718291 [2023-08-29 23:58:00,753 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1002 transitions. [2023-08-29 23:58:00,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1002 transitions. [2023-08-29 23:58:00,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:58:00,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1002 transitions. [2023-08-29 23:58:00,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:00,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:00,761 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:00,761 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 114 flow. Second operand 3 states and 1002 transitions. [2023-08-29 23:58:00,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 99 transitions, 404 flow [2023-08-29 23:58:00,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 99 transitions, 403 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:58:00,764 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 163 flow [2023-08-29 23:58:00,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2023-08-29 23:58:00,765 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -7 predicate places. [2023-08-29 23:58:00,765 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 163 flow [2023-08-29 23:58:00,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 301.6666666666667) internal successors, (905), 3 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:00,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:58:00,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:58:00,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-08-29 23:58:00,972 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 [2023-08-29 23:58:00,973 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 23:58:00,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:58:00,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1371881, now seen corresponding path program 1 times [2023-08-29 23:58:00,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:58:00,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133713622] [2023-08-29 23:58:00,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:58:00,975 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:58:00,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:58:00,976 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) [2023-08-29 23:58:00,979 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 [2023-08-29 23:58:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:58:01,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:58:01,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:58:01,128 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:58:01,128 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 [2023-08-29 23:58:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:01,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:58:01,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:01,335 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:58:01,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133713622] [2023-08-29 23:58:01,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133713622] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:58:01,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:58:01,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:58:01,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529243813] [2023-08-29 23:58:01,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:58:01,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:58:01,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:58:01,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:58:01,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:58:02,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 749 [2023-08-29 23:58:02,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 163 flow. Second operand has 6 states, 6 states have (on average 287.0) internal successors, (1722), 6 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:02,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:58:02,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 749 [2023-08-29 23:58:02,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:58:05,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:58:07,242 INFO L130 PetriNetUnfolder]: 14813/18554 cut-off events. [2023-08-29 23:58:07,243 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-29 23:58:07,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37159 conditions, 18554 events. 14813/18554 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 1468. Compared 90684 event pairs, 7192 based on Foata normal form. 0/4441 useless extension candidates. Maximal degree in co-relation 37150. Up to 6210 conditions per place. [2023-08-29 23:58:07,329 INFO L137 encePairwiseOnDemand]: 737/749 looper letters, 131 selfloop transitions, 27 changer transitions 0/161 dead transitions. [2023-08-29 23:58:07,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 161 transitions, 739 flow [2023-08-29 23:58:07,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:58:07,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:58:07,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1883 transitions. [2023-08-29 23:58:07,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4190031152647975 [2023-08-29 23:58:07,336 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1883 transitions. [2023-08-29 23:58:07,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1883 transitions. [2023-08-29 23:58:07,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:58:07,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1883 transitions. [2023-08-29 23:58:07,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 313.8333333333333) internal successors, (1883), 6 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:07,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 749.0) internal successors, (5243), 7 states have internal predecessors, (5243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:07,350 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 749.0) internal successors, (5243), 7 states have internal predecessors, (5243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:07,350 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 163 flow. Second operand 6 states and 1883 transitions. [2023-08-29 23:58:07,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 161 transitions, 739 flow [2023-08-29 23:58:07,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 161 transitions, 715 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:58:07,357 INFO L231 Difference]: Finished difference. Result has 63 places, 79 transitions, 355 flow [2023-08-29 23:58:07,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=355, PETRI_PLACES=63, PETRI_TRANSITIONS=79} [2023-08-29 23:58:07,358 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2023-08-29 23:58:07,358 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 79 transitions, 355 flow [2023-08-29 23:58:07,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 287.0) internal successors, (1722), 6 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:07,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:58:07,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:58:07,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 23:58:07,570 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 [2023-08-29 23:58:07,571 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 23:58:07,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:58:07,576 INFO L85 PathProgramCache]: Analyzing trace with hash 42582758, now seen corresponding path program 1 times [2023-08-29 23:58:07,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:58:07,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250614518] [2023-08-29 23:58:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:58:07,577 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 [2023-08-29 23:58:07,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:58:07,578 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) [2023-08-29 23:58:07,581 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 [2023-08-29 23:58:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:58:07,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 23:58:07,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:58:07,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:07,764 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-29 23:58:07,764 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 [2023-08-29 23:58:08,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:08,054 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-29 23:58:08,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-08-29 23:58:08,349 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-08-29 23:58:08,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2023-08-29 23:58:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:08,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:58:08,625 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:58:08,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250614518] [2023-08-29 23:58:08,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250614518] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:58:08,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:58:08,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:58:08,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309030019] [2023-08-29 23:58:08,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:58:08,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:58:08,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:58:08,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:58:08,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:58:09,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 749 [2023-08-29 23:58:09,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 79 transitions, 355 flow. Second operand has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:09,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:58:09,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 749 [2023-08-29 23:58:09,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:58:11,068 INFO L130 PetriNetUnfolder]: 11667/14730 cut-off events. [2023-08-29 23:58:11,068 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-29 23:58:11,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29583 conditions, 14730 events. 11667/14730 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 1244. Compared 72472 event pairs, 5610 based on Foata normal form. 0/3746 useless extension candidates. Maximal degree in co-relation 29570. Up to 14652 conditions per place. [2023-08-29 23:58:11,130 INFO L137 encePairwiseOnDemand]: 746/749 looper letters, 71 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2023-08-29 23:58:11,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 75 transitions, 479 flow [2023-08-29 23:58:11,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:58:11,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:58:11,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 974 transitions. [2023-08-29 23:58:11,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43346684468179797 [2023-08-29 23:58:11,135 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 974 transitions. [2023-08-29 23:58:11,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 974 transitions. [2023-08-29 23:58:11,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:58:11,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 974 transitions. [2023-08-29 23:58:11,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.6666666666667) internal successors, (974), 3 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:11,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:11,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:11,142 INFO L175 Difference]: Start difference. First operand has 63 places, 79 transitions, 355 flow. Second operand 3 states and 974 transitions. [2023-08-29 23:58:11,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 75 transitions, 479 flow [2023-08-29 23:58:11,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 75 transitions, 449 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-29 23:58:11,145 INFO L231 Difference]: Finished difference. Result has 62 places, 75 transitions, 307 flow [2023-08-29 23:58:11,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=307, PETRI_PLACES=62, PETRI_TRANSITIONS=75} [2023-08-29 23:58:11,146 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2023-08-29 23:58:11,146 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 75 transitions, 307 flow [2023-08-29 23:58:11,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:11,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:58:11,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:58:11,163 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 [2023-08-29 23:58:11,364 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 [2023-08-29 23:58:11,364 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 23:58:11,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:58:11,365 INFO L85 PathProgramCache]: Analyzing trace with hash 42582760, now seen corresponding path program 1 times [2023-08-29 23:58:11,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:58:11,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960144770] [2023-08-29 23:58:11,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:58:11,366 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 [2023-08-29 23:58:11,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:58:11,367 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) [2023-08-29 23:58:11,371 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 [2023-08-29 23:58:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:58:11,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:58:11,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:58:11,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:11,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:11,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:11,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:11,545 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-29 23:58:11,546 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 [2023-08-29 23:58:11,564 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-29 23:58:11,565 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 [2023-08-29 23:58:11,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:11,609 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 [2023-08-29 23:58:11,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:11,637 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 [2023-08-29 23:58:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:11,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:58:11,660 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:58:11,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960144770] [2023-08-29 23:58:11,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960144770] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:58:11,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:58:11,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:58:11,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394288099] [2023-08-29 23:58:11,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:58:11,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:58:11,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:58:11,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:58:11,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:58:11,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 749 [2023-08-29 23:58:11,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 75 transitions, 307 flow. Second operand has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:11,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:58:11,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 749 [2023-08-29 23:58:11,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:58:12,835 INFO L130 PetriNetUnfolder]: 8365/10750 cut-off events. [2023-08-29 23:58:12,835 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-29 23:58:12,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21597 conditions, 10750 events. 8365/10750 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 52869 event pairs, 3990 based on Foata normal form. 0/3056 useless extension candidates. Maximal degree in co-relation 21583. Up to 10672 conditions per place. [2023-08-29 23:58:12,875 INFO L137 encePairwiseOnDemand]: 746/749 looper letters, 67 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-08-29 23:58:12,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 71 transitions, 423 flow [2023-08-29 23:58:12,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:58:12,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:58:12,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 972 transitions. [2023-08-29 23:58:12,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325767690253672 [2023-08-29 23:58:12,879 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 972 transitions. [2023-08-29 23:58:12,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 972 transitions. [2023-08-29 23:58:12,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:58:12,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 972 transitions. [2023-08-29 23:58:12,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:12,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:12,887 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:12,887 INFO L175 Difference]: Start difference. First operand has 62 places, 75 transitions, 307 flow. Second operand 3 states and 972 transitions. [2023-08-29 23:58:12,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 71 transitions, 423 flow [2023-08-29 23:58:12,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 71 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:58:12,889 INFO L231 Difference]: Finished difference. Result has 61 places, 71 transitions, 288 flow [2023-08-29 23:58:12,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=288, PETRI_PLACES=61, PETRI_TRANSITIONS=71} [2023-08-29 23:58:12,890 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2023-08-29 23:58:12,891 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 71 transitions, 288 flow [2023-08-29 23:58:12,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:12,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:58:12,892 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 23:58:12,903 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 [2023-08-29 23:58:13,101 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 [2023-08-29 23:58:13,101 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 23:58:13,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:58:13,102 INFO L85 PathProgramCache]: Analyzing trace with hash -2074879943, now seen corresponding path program 2 times [2023-08-29 23:58:13,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:58:13,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767640412] [2023-08-29 23:58:13,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:58:13,102 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 [2023-08-29 23:58:13,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:58:13,103 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) [2023-08-29 23:58:13,104 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 [2023-08-29 23:58:13,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:58:13,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:58:13,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:58:13,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:58:13,277 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:58:13,278 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 [2023-08-29 23:58:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:13,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:58:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:13,857 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:58:13,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767640412] [2023-08-29 23:58:13,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767640412] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:58:13,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:58:13,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:58:13,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198590254] [2023-08-29 23:58:13,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:58:13,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:58:13,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:58:13,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:58:13,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:58:19,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 749 [2023-08-29 23:58:19,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 71 transitions, 288 flow. Second operand has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:19,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:58:19,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 749 [2023-08-29 23:58:19,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:58:22,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:58:23,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:58:24,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:58:26,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:58:28,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:58:29,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:58:31,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:58:33,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:58:34,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:58:36,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:58:37,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:58:39,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:58:42,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:58:43,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:58:46,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:58:47,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:58:54,708 INFO L130 PetriNetUnfolder]: 27252/35180 cut-off events. [2023-08-29 23:58:54,708 INFO L131 PetriNetUnfolder]: For 116/116 co-relation queries the response was YES. [2023-08-29 23:58:54,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70528 conditions, 35180 events. 27252/35180 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 1488. Compared 193289 event pairs, 13219 based on Foata normal form. 16/10181 useless extension candidates. Maximal degree in co-relation 70513. Up to 3570 conditions per place. [2023-08-29 23:58:54,871 INFO L137 encePairwiseOnDemand]: 739/749 looper letters, 379 selfloop transitions, 53 changer transitions 0/435 dead transitions. [2023-08-29 23:58:54,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 435 transitions, 2102 flow [2023-08-29 23:58:54,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-29 23:58:54,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-29 23:58:54,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 5072 transitions. [2023-08-29 23:58:54,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232309746328438 [2023-08-29 23:58:54,885 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 5072 transitions. [2023-08-29 23:58:54,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 5072 transitions. [2023-08-29 23:58:54,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:58:54,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 5072 transitions. [2023-08-29 23:58:54,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 317.0) internal successors, (5072), 16 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:54,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 749.0) internal successors, (12733), 17 states have internal predecessors, (12733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:54,914 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 749.0) internal successors, (12733), 17 states have internal predecessors, (12733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:54,914 INFO L175 Difference]: Start difference. First operand has 61 places, 71 transitions, 288 flow. Second operand 16 states and 5072 transitions. [2023-08-29 23:58:54,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 435 transitions, 2102 flow [2023-08-29 23:58:54,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 435 transitions, 2101 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:58:54,922 INFO L231 Difference]: Finished difference. Result has 85 places, 103 transitions, 682 flow [2023-08-29 23:58:54,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=682, PETRI_PLACES=85, PETRI_TRANSITIONS=103} [2023-08-29 23:58:54,925 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 22 predicate places. [2023-08-29 23:58:54,925 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 103 transitions, 682 flow [2023-08-29 23:58:54,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:54,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:58:54,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:58:54,946 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 [2023-08-29 23:58:55,140 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 [2023-08-29 23:58:55,141 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 23:58:55,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:58:55,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2027610777, now seen corresponding path program 1 times [2023-08-29 23:58:55,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:58:55,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229153776] [2023-08-29 23:58:55,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:58:55,142 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 [2023-08-29 23:58:55,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:58:55,142 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) [2023-08-29 23:58:55,144 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 [2023-08-29 23:58:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:58:55,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:58:55,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:58:55,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:55,312 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-29 23:58:55,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-29 23:58:55,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:55,508 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-08-29 23:58:55,508 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 [2023-08-29 23:58:55,657 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-29 23:58:55,657 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 [2023-08-29 23:58:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:55,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:58:55,768 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:58:55,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229153776] [2023-08-29 23:58:55,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229153776] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:58:55,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:58:55,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:58:55,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187606022] [2023-08-29 23:58:55,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:58:55,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:58:55,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:58:55,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:58:55,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:58:56,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 749 [2023-08-29 23:58:56,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 103 transitions, 682 flow. Second operand has 4 states, 4 states have (on average 308.5) internal successors, (1234), 4 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:56,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:58:56,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 749 [2023-08-29 23:58:56,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:58:59,204 INFO L130 PetriNetUnfolder]: 26274/33702 cut-off events. [2023-08-29 23:58:59,204 INFO L131 PetriNetUnfolder]: For 187/187 co-relation queries the response was YES. [2023-08-29 23:58:59,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67751 conditions, 33702 events. 26274/33702 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 1436. Compared 182861 event pairs, 12510 based on Foata normal form. 0/9849 useless extension candidates. Maximal degree in co-relation 67725. Up to 33442 conditions per place. [2023-08-29 23:58:59,364 INFO L137 encePairwiseOnDemand]: 746/749 looper letters, 97 selfloop transitions, 1 changer transitions 0/101 dead transitions. [2023-08-29 23:58:59,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 101 transitions, 874 flow [2023-08-29 23:58:59,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:58:59,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:58:59,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 967 transitions. [2023-08-29 23:58:59,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4303515798842902 [2023-08-29 23:58:59,368 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 967 transitions. [2023-08-29 23:58:59,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 967 transitions. [2023-08-29 23:58:59,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:58:59,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 967 transitions. [2023-08-29 23:58:59,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 322.3333333333333) internal successors, (967), 3 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:59,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:59,373 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:59,373 INFO L175 Difference]: Start difference. First operand has 85 places, 103 transitions, 682 flow. Second operand 3 states and 967 transitions. [2023-08-29 23:58:59,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 101 transitions, 874 flow [2023-08-29 23:58:59,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 101 transitions, 772 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-08-29 23:58:59,378 INFO L231 Difference]: Finished difference. Result has 81 places, 101 transitions, 578 flow [2023-08-29 23:58:59,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=578, PETRI_PLACES=81, PETRI_TRANSITIONS=101} [2023-08-29 23:58:59,379 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 18 predicate places. [2023-08-29 23:58:59,379 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 101 transitions, 578 flow [2023-08-29 23:58:59,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 308.5) internal successors, (1234), 4 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:59,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:58:59,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:58:59,393 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 [2023-08-29 23:58:59,589 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 [2023-08-29 23:58:59,589 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 23:58:59,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:58:59,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2027610776, now seen corresponding path program 1 times [2023-08-29 23:58:59,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:58:59,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960644713] [2023-08-29 23:58:59,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:58:59,590 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 [2023-08-29 23:58:59,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:58:59,591 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) [2023-08-29 23:58:59,592 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 [2023-08-29 23:58:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:58:59,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:58:59,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:58:59,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:59,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:59,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:59,751 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 23:58:59,752 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 [2023-08-29 23:58:59,761 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 [2023-08-29 23:58:59,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:59,797 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 [2023-08-29 23:58:59,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:59,822 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 [2023-08-29 23:58:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:59,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:58:59,866 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:58:59,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960644713] [2023-08-29 23:58:59,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960644713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:58:59,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:58:59,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:58:59,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354473872] [2023-08-29 23:58:59,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:58:59,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:58:59,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:58:59,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:58:59,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:59:00,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 749 [2023-08-29 23:59:00,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 101 transitions, 578 flow. Second operand has 4 states, 4 states have (on average 309.5) internal successors, (1238), 4 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:00,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:59:00,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 749 [2023-08-29 23:59:00,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:59:03,194 INFO L130 PetriNetUnfolder]: 24684/31612 cut-off events. [2023-08-29 23:59:03,194 INFO L131 PetriNetUnfolder]: For 231/231 co-relation queries the response was YES. [2023-08-29 23:59:03,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63510 conditions, 31612 events. 24684/31612 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 1316. Compared 168555 event pairs, 11720 based on Foata normal form. 0/9552 useless extension candidates. Maximal degree in co-relation 63483. Up to 31352 conditions per place. [2023-08-29 23:59:03,320 INFO L137 encePairwiseOnDemand]: 746/749 looper letters, 95 selfloop transitions, 1 changer transitions 0/99 dead transitions. [2023-08-29 23:59:03,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 99 transitions, 766 flow [2023-08-29 23:59:03,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:59:03,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:59:03,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 968 transitions. [2023-08-29 23:59:03,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43079661771250555 [2023-08-29 23:59:03,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 968 transitions. [2023-08-29 23:59:03,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 968 transitions. [2023-08-29 23:59:03,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:59:03,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 968 transitions. [2023-08-29 23:59:03,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:03,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:03,329 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:03,329 INFO L175 Difference]: Start difference. First operand has 81 places, 101 transitions, 578 flow. Second operand 3 states and 968 transitions. [2023-08-29 23:59:03,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 99 transitions, 766 flow [2023-08-29 23:59:03,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 99 transitions, 765 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:59:03,333 INFO L231 Difference]: Finished difference. Result has 80 places, 99 transitions, 575 flow [2023-08-29 23:59:03,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=575, PETRI_PLACES=80, PETRI_TRANSITIONS=99} [2023-08-29 23:59:03,334 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 17 predicate places. [2023-08-29 23:59:03,334 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 99 transitions, 575 flow [2023-08-29 23:59:03,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 309.5) internal successors, (1238), 4 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:03,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:59:03,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:59:03,346 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 [2023-08-29 23:59:03,546 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 [2023-08-29 23:59:03,546 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 23:59:03,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:59:03,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1568562252, now seen corresponding path program 1 times [2023-08-29 23:59:03,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:59:03,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866546725] [2023-08-29 23:59:03,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:59:03,547 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 [2023-08-29 23:59:03,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:59:03,548 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) [2023-08-29 23:59:03,551 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 [2023-08-29 23:59:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:59:03,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:59:03,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:59:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:59:03,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:59:03,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:59:03,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866546725] [2023-08-29 23:59:03,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866546725] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:59:03,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:59:03,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:59:03,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531371233] [2023-08-29 23:59:03,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:59:03,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:59:03,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:59:03,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:59:03,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:59:03,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 749 [2023-08-29 23:59:03,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 99 transitions, 575 flow. Second operand has 5 states, 5 states have (on average 300.4) internal successors, (1502), 5 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:03,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:59:03,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 749 [2023-08-29 23:59:03,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:59:06,890 INFO L130 PetriNetUnfolder]: 20199/26905 cut-off events. [2023-08-29 23:59:06,890 INFO L131 PetriNetUnfolder]: For 227/227 co-relation queries the response was YES. [2023-08-29 23:59:06,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54073 conditions, 26905 events. 20199/26905 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 1175. Compared 153997 event pairs, 10594 based on Foata normal form. 2/9392 useless extension candidates. Maximal degree in co-relation 54045. Up to 24727 conditions per place. [2023-08-29 23:59:07,022 INFO L137 encePairwiseOnDemand]: 738/749 looper letters, 121 selfloop transitions, 28 changer transitions 0/151 dead transitions. [2023-08-29 23:59:07,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 151 transitions, 995 flow [2023-08-29 23:59:07,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:59:07,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:59:07,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1600 transitions. [2023-08-29 23:59:07,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4272363150867824 [2023-08-29 23:59:07,026 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1600 transitions. [2023-08-29 23:59:07,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1600 transitions. [2023-08-29 23:59:07,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:59:07,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1600 transitions. [2023-08-29 23:59:07,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 320.0) internal successors, (1600), 5 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:07,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 749.0) internal successors, (4494), 6 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:07,034 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 749.0) internal successors, (4494), 6 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:07,034 INFO L175 Difference]: Start difference. First operand has 80 places, 99 transitions, 575 flow. Second operand 5 states and 1600 transitions. [2023-08-29 23:59:07,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 151 transitions, 995 flow [2023-08-29 23:59:07,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 151 transitions, 994 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:59:07,039 INFO L231 Difference]: Finished difference. Result has 86 places, 102 transitions, 686 flow [2023-08-29 23:59:07,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=686, PETRI_PLACES=86, PETRI_TRANSITIONS=102} [2023-08-29 23:59:07,040 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 23 predicate places. [2023-08-29 23:59:07,040 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 102 transitions, 686 flow [2023-08-29 23:59:07,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 300.4) internal successors, (1502), 5 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:07,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:59:07,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:59:07,052 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 [2023-08-29 23:59:07,250 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 [2023-08-29 23:59:07,250 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 23:59:07,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:59:07,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1381225625, now seen corresponding path program 1 times [2023-08-29 23:59:07,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:59:07,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027703806] [2023-08-29 23:59:07,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:59:07,252 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 [2023-08-29 23:59:07,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:59:07,253 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) [2023-08-29 23:59:07,255 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 [2023-08-29 23:59:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:59:07,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:59:07,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:59:07,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:59:07,453 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-08-29 23:59:07,453 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 [2023-08-29 23:59:07,468 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 120 treesize of output 116 [2023-08-29 23:59:07,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:59:07,522 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 [2023-08-29 23:59:07,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:59:07,562 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 [2023-08-29 23:59:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:59:07,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:59:07,632 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:59:07,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027703806] [2023-08-29 23:59:07,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027703806] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:59:07,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:59:07,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:59:07,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234609986] [2023-08-29 23:59:07,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:59:07,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:59:07,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:59:07,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:59:07,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:59:08,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 749 [2023-08-29 23:59:08,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 102 transitions, 686 flow. Second operand has 5 states, 5 states have (on average 307.6) internal successors, (1538), 5 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:08,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:59:08,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 749 [2023-08-29 23:59:08,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:59:10,642 INFO L130 PetriNetUnfolder]: 22887/29157 cut-off events. [2023-08-29 23:59:10,643 INFO L131 PetriNetUnfolder]: For 1316/1417 co-relation queries the response was YES. [2023-08-29 23:59:10,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64313 conditions, 29157 events. 22887/29157 cut-off events. For 1316/1417 co-relation queries the response was YES. Maximal size of possible extension queue 1186. Compared 151533 event pairs, 10748 based on Foata normal form. 101/11023 useless extension candidates. Maximal degree in co-relation 64281. Up to 28957 conditions per place. [2023-08-29 23:59:10,798 INFO L137 encePairwiseOnDemand]: 746/749 looper letters, 95 selfloop transitions, 1 changer transitions 0/100 dead transitions. [2023-08-29 23:59:10,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 100 transitions, 874 flow [2023-08-29 23:59:10,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:59:10,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:59:10,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 960 transitions. [2023-08-29 23:59:10,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4272363150867824 [2023-08-29 23:59:10,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 960 transitions. [2023-08-29 23:59:10,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 960 transitions. [2023-08-29 23:59:10,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:59:10,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 960 transitions. [2023-08-29 23:59:10,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 320.0) internal successors, (960), 3 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:10,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:10,809 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:10,809 INFO L175 Difference]: Start difference. First operand has 86 places, 102 transitions, 686 flow. Second operand 3 states and 960 transitions. [2023-08-29 23:59:10,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 100 transitions, 874 flow [2023-08-29 23:59:10,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 100 transitions, 842 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-29 23:59:10,820 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 652 flow [2023-08-29 23:59:10,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=652, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2023-08-29 23:59:10,821 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 22 predicate places. [2023-08-29 23:59:10,821 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 652 flow [2023-08-29 23:59:10,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 307.6) internal successors, (1538), 5 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:10,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:59:10,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:59:10,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 23:59:11,022 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 [2023-08-29 23:59:11,022 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 23:59:11,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:59:11,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1381225624, now seen corresponding path program 1 times [2023-08-29 23:59:11,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:59:11,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016621983] [2023-08-29 23:59:11,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:59:11,023 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 [2023-08-29 23:59:11,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:59:11,024 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) [2023-08-29 23:59:11,024 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 [2023-08-29 23:59:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:59:11,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:59:11,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:59:11,182 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-29 23:59:11,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-29 23:59:11,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:59:11,216 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 [2023-08-29 23:59:11,244 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 23:59:11,244 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 [2023-08-29 23:59:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:59:11,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:59:11,280 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:59:11,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016621983] [2023-08-29 23:59:11,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016621983] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:59:11,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:59:11,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:59:11,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187425549] [2023-08-29 23:59:11,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:59:11,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:59:11,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:59:11,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:59:11,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:59:11,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 749 [2023-08-29 23:59:11,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 652 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) [2023-08-29 23:59:11,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:59:11,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 749 [2023-08-29 23:59:11,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:59:13,979 INFO L130 PetriNetUnfolder]: 22024/27969 cut-off events. [2023-08-29 23:59:13,979 INFO L131 PetriNetUnfolder]: For 1588/1684 co-relation queries the response was YES. [2023-08-29 23:59:14,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61661 conditions, 27969 events. 22024/27969 cut-off events. For 1588/1684 co-relation queries the response was YES. Maximal size of possible extension queue 1142. Compared 144782 event pairs, 10333 based on Foata normal form. 96/10757 useless extension candidates. Maximal degree in co-relation 61628. Up to 27769 conditions per place. [2023-08-29 23:59:14,118 INFO L137 encePairwiseOnDemand]: 746/749 looper letters, 93 selfloop transitions, 1 changer transitions 0/98 dead transitions. [2023-08-29 23:59:14,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 98 transitions, 836 flow [2023-08-29 23:59:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:59:14,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:59:14,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 952 transitions. [2023-08-29 23:59:14,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236760124610592 [2023-08-29 23:59:14,121 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 952 transitions. [2023-08-29 23:59:14,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 952 transitions. [2023-08-29 23:59:14,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:59:14,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 952 transitions. [2023-08-29 23:59:14,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 317.3333333333333) internal successors, (952), 3 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:14,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:14,125 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:14,125 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 652 flow. Second operand 3 states and 952 transitions. [2023-08-29 23:59:14,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 98 transitions, 836 flow [2023-08-29 23:59:14,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 98 transitions, 835 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:59:14,134 INFO L231 Difference]: Finished difference. Result has 84 places, 98 transitions, 649 flow [2023-08-29 23:59:14,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=649, PETRI_PLACES=84, PETRI_TRANSITIONS=98} [2023-08-29 23:59:14,134 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 21 predicate places. [2023-08-29 23:59:14,135 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 98 transitions, 649 flow [2023-08-29 23:59:14,135 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) [2023-08-29 23:59:14,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:59:14,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:59:14,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 23:59:14,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:14,341 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 23:59:14,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:59:14,341 INFO L85 PathProgramCache]: Analyzing trace with hash -131690291, now seen corresponding path program 1 times [2023-08-29 23:59:14,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:59:14,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469391521] [2023-08-29 23:59:14,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:59:14,342 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 [2023-08-29 23:59:14,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:59:14,342 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:59:14,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 23:59:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:59:14,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:59:14,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:59:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:59:14,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:59:14,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:59:14,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469391521] [2023-08-29 23:59:14,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469391521] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:59:14,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:59:14,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:59:14,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670482187] [2023-08-29 23:59:14,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:59:14,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:59:14,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:59:14,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:59:14,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:59:14,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 749 [2023-08-29 23:59:14,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 98 transitions, 649 flow. Second operand has 5 states, 5 states have (on average 300.8) internal successors, (1504), 5 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:14,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:59:14,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 749 [2023-08-29 23:59:14,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:59:17,479 INFO L130 PetriNetUnfolder]: 18891/24720 cut-off events. [2023-08-29 23:59:17,480 INFO L131 PetriNetUnfolder]: For 2043/2103 co-relation queries the response was YES. [2023-08-29 23:59:17,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55285 conditions, 24720 events. 18891/24720 cut-off events. For 2043/2103 co-relation queries the response was YES. Maximal size of possible extension queue 1213. Compared 136171 event pairs, 10069 based on Foata normal form. 60/10681 useless extension candidates. Maximal degree in co-relation 55251. Up to 23971 conditions per place. [2023-08-29 23:59:17,620 INFO L137 encePairwiseOnDemand]: 738/749 looper letters, 105 selfloop transitions, 28 changer transitions 0/136 dead transitions. [2023-08-29 23:59:17,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 136 transitions, 1005 flow [2023-08-29 23:59:17,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:59:17,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:59:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1582 transitions. [2023-08-29 23:59:17,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224299065420561 [2023-08-29 23:59:17,624 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1582 transitions. [2023-08-29 23:59:17,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1582 transitions. [2023-08-29 23:59:17,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:59:17,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1582 transitions. [2023-08-29 23:59:17,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 316.4) internal successors, (1582), 5 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:17,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 749.0) internal successors, (4494), 6 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:17,632 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 749.0) internal successors, (4494), 6 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:17,632 INFO L175 Difference]: Start difference. First operand has 84 places, 98 transitions, 649 flow. Second operand 5 states and 1582 transitions. [2023-08-29 23:59:17,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 136 transitions, 1005 flow [2023-08-29 23:59:17,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 136 transitions, 1004 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:59:17,644 INFO L231 Difference]: Finished difference. Result has 89 places, 99 transitions, 719 flow [2023-08-29 23:59:17,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=719, PETRI_PLACES=89, PETRI_TRANSITIONS=99} [2023-08-29 23:59:17,645 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 26 predicate places. [2023-08-29 23:59:17,645 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 99 transitions, 719 flow [2023-08-29 23:59:17,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 300.8) internal successors, (1504), 5 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:17,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:59:17,646 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1] [2023-08-29 23:59:17,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 23:59:17,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:17,858 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 23:59:17,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:59:17,858 INFO L85 PathProgramCache]: Analyzing trace with hash -271024028, now seen corresponding path program 1 times [2023-08-29 23:59:17,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:59:17,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936227136] [2023-08-29 23:59:17,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:59:17,859 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 [2023-08-29 23:59:17,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:59:17,859 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:59:17,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 23:59:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:59:17,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-29 23:59:17,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:59:18,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 23:59:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:59:18,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:59:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:59:18,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:59:18,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936227136] [2023-08-29 23:59:18,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936227136] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:59:18,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:59:18,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 16 [2023-08-29 23:59:18,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673794233] [2023-08-29 23:59:18,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:59:18,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 23:59:18,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:59:18,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 23:59:18,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-08-29 23:59:28,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 749 [2023-08-29 23:59:28,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 99 transitions, 719 flow. Second operand has 17 states, 17 states have (on average 282.11764705882354) internal successors, (4796), 17 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:28,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:59:28,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 749 [2023-08-29 23:59:28,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:59:46,764 INFO L130 PetriNetUnfolder]: 36506/47076 cut-off events. [2023-08-29 23:59:46,764 INFO L131 PetriNetUnfolder]: For 6905/7275 co-relation queries the response was YES. [2023-08-29 23:59:47,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114466 conditions, 47076 events. 36506/47076 cut-off events. For 6905/7275 co-relation queries the response was YES. Maximal size of possible extension queue 2190. Compared 274909 event pairs, 17909 based on Foata normal form. 373/22497 useless extension candidates. Maximal degree in co-relation 114429. Up to 16864 conditions per place. [2023-08-29 23:59:47,158 INFO L137 encePairwiseOnDemand]: 739/749 looper letters, 405 selfloop transitions, 65 changer transitions 0/475 dead transitions. [2023-08-29 23:59:47,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 475 transitions, 2834 flow [2023-08-29 23:59:47,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-29 23:59:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-29 23:59:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 5218 transitions. [2023-08-29 23:59:47,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4098013036990497 [2023-08-29 23:59:47,167 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 5218 transitions. [2023-08-29 23:59:47,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 5218 transitions. [2023-08-29 23:59:47,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:59:47,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 5218 transitions. [2023-08-29 23:59:47,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 306.94117647058823) internal successors, (5218), 17 states have internal predecessors, (5218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:47,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 749.0) internal successors, (13482), 18 states have internal predecessors, (13482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:47,191 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 749.0) internal successors, (13482), 18 states have internal predecessors, (13482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:47,191 INFO L175 Difference]: Start difference. First operand has 89 places, 99 transitions, 719 flow. Second operand 17 states and 5218 transitions. [2023-08-29 23:59:47,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 475 transitions, 2834 flow [2023-08-29 23:59:47,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 475 transitions, 2757 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:59:47,285 INFO L231 Difference]: Finished difference. Result has 106 places, 125 transitions, 1025 flow [2023-08-29 23:59:47,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1025, PETRI_PLACES=106, PETRI_TRANSITIONS=125} [2023-08-29 23:59:47,286 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 43 predicate places. [2023-08-29 23:59:47,286 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 125 transitions, 1025 flow [2023-08-29 23:59:47,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 282.11764705882354) internal successors, (4796), 17 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:47,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:59:47,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:59:47,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-29 23:59:47,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:47,498 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 23:59:47,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:59:47,498 INFO L85 PathProgramCache]: Analyzing trace with hash 836960869, now seen corresponding path program 1 times [2023-08-29 23:59:47,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:59:47,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935949745] [2023-08-29 23:59:47,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:59:47,498 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 [2023-08-29 23:59:47,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:59:47,499 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:59:47,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-29 23:59:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:59:47,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:59:47,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:59:47,693 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 23:59:47,694 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 [2023-08-29 23:59:47,719 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 23:59:47,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 23:59:47,739 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 23:59:47,740 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 [2023-08-29 23:59:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:59:47,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:59:47,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:59:47,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935949745] [2023-08-29 23:59:47,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935949745] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:59:47,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:59:47,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:59:47,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736951890] [2023-08-29 23:59:47,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:59:47,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:59:47,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:59:47,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:59:47,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:59:48,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 749 [2023-08-29 23:59:48,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 125 transitions, 1025 flow. Second operand has 4 states, 4 states have (on average 297.25) internal successors, (1189), 4 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:48,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:59:48,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 749 [2023-08-29 23:59:48,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:59:52,330 INFO L130 PetriNetUnfolder]: 28106/36156 cut-off events. [2023-08-29 23:59:52,331 INFO L131 PetriNetUnfolder]: For 4446/4770 co-relation queries the response was YES. [2023-08-29 23:59:52,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86862 conditions, 36156 events. 28106/36156 cut-off events. For 4446/4770 co-relation queries the response was YES. Maximal size of possible extension queue 1610. Compared 199065 event pairs, 13236 based on Foata normal form. 324/18648 useless extension candidates. Maximal degree in co-relation 86822. Up to 35859 conditions per place. [2023-08-29 23:59:52,570 INFO L137 encePairwiseOnDemand]: 745/749 looper letters, 106 selfloop transitions, 12 changer transitions 0/123 dead transitions. [2023-08-29 23:59:52,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 123 transitions, 1255 flow [2023-08-29 23:59:52,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:59:52,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:59:52,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1218 transitions. [2023-08-29 23:59:52,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40654205607476634 [2023-08-29 23:59:52,574 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1218 transitions. [2023-08-29 23:59:52,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1218 transitions. [2023-08-29 23:59:52,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:59:52,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1218 transitions. [2023-08-29 23:59:52,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 304.5) internal successors, (1218), 4 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:52,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 749.0) internal successors, (3745), 5 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:52,577 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 749.0) internal successors, (3745), 5 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:52,577 INFO L175 Difference]: Start difference. First operand has 106 places, 125 transitions, 1025 flow. Second operand 4 states and 1218 transitions. [2023-08-29 23:59:52,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 123 transitions, 1255 flow [2023-08-29 23:59:52,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 123 transitions, 1209 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-29 23:59:52,622 INFO L231 Difference]: Finished difference. Result has 105 places, 123 transitions, 997 flow [2023-08-29 23:59:52,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=997, PETRI_PLACES=105, PETRI_TRANSITIONS=123} [2023-08-29 23:59:52,623 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 42 predicate places. [2023-08-29 23:59:52,623 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 123 transitions, 997 flow [2023-08-29 23:59:52,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 297.25) internal successors, (1189), 4 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:52,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:59:52,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:59:52,631 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 (15)] Ended with exit code 0 [2023-08-29 23:59:52,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:52,824 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 23:59:52,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:59:52,824 INFO L85 PathProgramCache]: Analyzing trace with hash 836960870, now seen corresponding path program 1 times [2023-08-29 23:59:52,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:59:52,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402561197] [2023-08-29 23:59:52,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:59:52,825 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 [2023-08-29 23:59:52,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:59:52,826 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:59:52,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-29 23:59:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:59:52,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 23:59:52,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:59:53,134 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:59:53,134 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 [2023-08-29 23:59:53,213 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 23:59:53,213 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 [2023-08-29 23:59:53,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:59:53,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 23:59:53,315 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:59:53,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:59:53,371 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-08-29 23:59:53,371 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 16 treesize of output 18 [2023-08-29 23:59:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 23:59:53,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:59:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 23:59:57,996 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:59:57,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402561197] [2023-08-29 23:59:57,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402561197] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:59:57,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:59:57,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:59:57,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253284241] [2023-08-29 23:59:57,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:59:57,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:59:57,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:59:57,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:59:57,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:00:06,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 749 [2023-08-30 00:00:06,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 123 transitions, 997 flow. Second operand has 12 states, 12 states have (on average 273.6666666666667) internal successors, (3284), 12 states have internal predecessors, (3284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:06,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:00:06,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 749 [2023-08-30 00:00:06,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:00:21,317 WARN L222 SmtUtils]: Spent 9.11s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:00:26,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:00:28,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 00:00:30,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:00:32,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 00:00:34,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:00:36,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:00:38,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:00:40,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:00:44,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:00:52,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:01:13,530 INFO L130 PetriNetUnfolder]: 64484/85258 cut-off events. [2023-08-30 00:01:13,531 INFO L131 PetriNetUnfolder]: For 13629/13879 co-relation queries the response was YES. [2023-08-30 00:01:14,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203420 conditions, 85258 events. 64484/85258 cut-off events. For 13629/13879 co-relation queries the response was YES. Maximal size of possible extension queue 3971. Compared 569782 event pairs, 26585 based on Foata normal form. 348/44790 useless extension candidates. Maximal degree in co-relation 203379. Up to 21535 conditions per place. [2023-08-30 00:01:14,534 INFO L137 encePairwiseOnDemand]: 735/749 looper letters, 370 selfloop transitions, 83 changer transitions 0/456 dead transitions. [2023-08-30 00:01:14,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 456 transitions, 3021 flow [2023-08-30 00:01:14,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 00:01:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 00:01:14,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 5827 transitions. [2023-08-30 00:01:14,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3889853137516689 [2023-08-30 00:01:14,548 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 5827 transitions. [2023-08-30 00:01:14,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 5827 transitions. [2023-08-30 00:01:14,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:01:14,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 5827 transitions. [2023-08-30 00:01:14,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 291.35) internal successors, (5827), 20 states have internal predecessors, (5827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:14,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 749.0) internal successors, (15729), 21 states have internal predecessors, (15729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:14,569 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 749.0) internal successors, (15729), 21 states have internal predecessors, (15729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:14,570 INFO L175 Difference]: Start difference. First operand has 105 places, 123 transitions, 997 flow. Second operand 20 states and 5827 transitions. [2023-08-30 00:01:14,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 456 transitions, 3021 flow [2023-08-30 00:01:15,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 456 transitions, 3008 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:01:15,029 INFO L231 Difference]: Finished difference. Result has 128 places, 150 transitions, 1411 flow [2023-08-30 00:01:15,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=964, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1411, PETRI_PLACES=128, PETRI_TRANSITIONS=150} [2023-08-30 00:01:15,029 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 65 predicate places. [2023-08-30 00:01:15,030 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 150 transitions, 1411 flow [2023-08-30 00:01:15,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 273.6666666666667) internal successors, (3284), 12 states have internal predecessors, (3284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:15,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:01:15,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:01:15,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 00:01:15,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:01:15,243 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:01:15,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:01:15,243 INFO L85 PathProgramCache]: Analyzing trace with hash 175995824, now seen corresponding path program 1 times [2023-08-30 00:01:15,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:01:15,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859658818] [2023-08-30 00:01:15,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:01:15,244 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 [2023-08-30 00:01:15,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:01:15,246 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:01:15,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 00:01:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:01:15,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:01:15,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:01:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:01:15,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:01:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:01:15,774 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:01:15,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859658818] [2023-08-30 00:01:15,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859658818] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:01:15,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:01:15,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:01:15,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771246871] [2023-08-30 00:01:15,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:01:15,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:01:15,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:01:15,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:01:15,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:01:16,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 749 [2023-08-30 00:01:16,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 150 transitions, 1411 flow. Second operand has 12 states, 12 states have (on average 293.8333333333333) internal successors, (3526), 12 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:16,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:01:16,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 749 [2023-08-30 00:01:16,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:01:33,755 INFO L130 PetriNetUnfolder]: 64089/84027 cut-off events. [2023-08-30 00:01:33,756 INFO L131 PetriNetUnfolder]: For 62143/62341 co-relation queries the response was YES. [2023-08-30 00:01:34,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231072 conditions, 84027 events. 64089/84027 cut-off events. For 62143/62341 co-relation queries the response was YES. Maximal size of possible extension queue 4005. Compared 555571 event pairs, 15110 based on Foata normal form. 1395/44416 useless extension candidates. Maximal degree in co-relation 231025. Up to 35097 conditions per place. [2023-08-30 00:01:34,871 INFO L137 encePairwiseOnDemand]: 735/749 looper letters, 192 selfloop transitions, 79 changer transitions 0/274 dead transitions. [2023-08-30 00:01:34,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 274 transitions, 2289 flow [2023-08-30 00:01:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 00:01:34,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 00:01:34,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4270 transitions. [2023-08-30 00:01:34,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40720961281708945 [2023-08-30 00:01:34,881 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4270 transitions. [2023-08-30 00:01:34,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4270 transitions. [2023-08-30 00:01:34,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:01:34,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4270 transitions. [2023-08-30 00:01:34,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:34,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 749.0) internal successors, (11235), 15 states have internal predecessors, (11235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:34,896 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 749.0) internal successors, (11235), 15 states have internal predecessors, (11235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:34,896 INFO L175 Difference]: Start difference. First operand has 128 places, 150 transitions, 1411 flow. Second operand 14 states and 4270 transitions. [2023-08-30 00:01:34,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 274 transitions, 2289 flow [2023-08-30 00:01:36,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 274 transitions, 2200 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-08-30 00:01:36,277 INFO L231 Difference]: Finished difference. Result has 141 places, 155 transitions, 1606 flow [2023-08-30 00:01:36,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=1322, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1606, PETRI_PLACES=141, PETRI_TRANSITIONS=155} [2023-08-30 00:01:36,278 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 78 predicate places. [2023-08-30 00:01:36,278 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 155 transitions, 1606 flow [2023-08-30 00:01:36,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 293.8333333333333) internal successors, (3526), 12 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:36,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:01:36,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:01:36,292 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 (17)] Forceful destruction successful, exit code 0 [2023-08-30 00:01:36,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:01:36,483 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:01:36,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:01:36,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1988182765, now seen corresponding path program 1 times [2023-08-30 00:01:36,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:01:36,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617519286] [2023-08-30 00:01:36,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:01:36,484 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 [2023-08-30 00:01:36,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:01:36,485 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:01:36,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 00:01:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:01:36,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:01:36,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:01:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:01:36,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:01:36,805 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:01:36,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617519286] [2023-08-30 00:01:36,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617519286] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:01:36,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:01:36,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:01:36,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259236958] [2023-08-30 00:01:36,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:01:36,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:01:36,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:01:36,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:01:36,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:01:37,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 749 [2023-08-30 00:01:37,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 155 transitions, 1606 flow. Second operand has 5 states, 5 states have (on average 301.2) internal successors, (1506), 5 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:37,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:01:37,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 749 [2023-08-30 00:01:37,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:01:46,618 INFO L130 PetriNetUnfolder]: 50663/68463 cut-off events. [2023-08-30 00:01:46,618 INFO L131 PetriNetUnfolder]: For 209039/212847 co-relation queries the response was YES. [2023-08-30 00:01:47,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222061 conditions, 68463 events. 50663/68463 cut-off events. For 209039/212847 co-relation queries the response was YES. Maximal size of possible extension queue 3682. Compared 470712 event pairs, 30994 based on Foata normal form. 3808/47499 useless extension candidates. Maximal degree in co-relation 222010. Up to 67950 conditions per place. [2023-08-30 00:01:47,502 INFO L137 encePairwiseOnDemand]: 735/749 looper letters, 121 selfloop transitions, 47 changer transitions 0/178 dead transitions. [2023-08-30 00:01:47,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 178 transitions, 2010 flow [2023-08-30 00:01:47,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:01:47,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:01:47,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1569 transitions. [2023-08-30 00:01:47,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418958611481976 [2023-08-30 00:01:47,505 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1569 transitions. [2023-08-30 00:01:47,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1569 transitions. [2023-08-30 00:01:47,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:01:47,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1569 transitions. [2023-08-30 00:01:47,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 313.8) internal successors, (1569), 5 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:47,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 749.0) internal successors, (4494), 6 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:47,510 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 749.0) internal successors, (4494), 6 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:47,510 INFO L175 Difference]: Start difference. First operand has 141 places, 155 transitions, 1606 flow. Second operand 5 states and 1569 transitions. [2023-08-30 00:01:47,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 178 transitions, 2010 flow [2023-08-30 00:01:48,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 178 transitions, 1932 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-30 00:01:48,260 INFO L231 Difference]: Finished difference. Result has 143 places, 156 transitions, 1645 flow [2023-08-30 00:01:48,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=1530, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1645, PETRI_PLACES=143, PETRI_TRANSITIONS=156} [2023-08-30 00:01:48,268 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 80 predicate places. [2023-08-30 00:01:48,268 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 156 transitions, 1645 flow [2023-08-30 00:01:48,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 301.2) internal successors, (1506), 5 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:48,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:01:48,269 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 00:01:48,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 00:01:48,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:01:48,481 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:01:48,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:01:48,481 INFO L85 PathProgramCache]: Analyzing trace with hash 184769081, now seen corresponding path program 3 times [2023-08-30 00:01:48,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:01:48,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969922046] [2023-08-30 00:01:48,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:01:48,482 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 [2023-08-30 00:01:48,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:01:48,484 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:01:48,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 00:01:48,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 00:01:48,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:01:48,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:01:48,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:01:49,047 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:01:49,048 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 [2023-08-30 00:01:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:01:49,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:01:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:01:52,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:01:52,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969922046] [2023-08-30 00:01:52,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969922046] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:01:52,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:01:52,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 00:01:52,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731248713] [2023-08-30 00:01:52,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:01:52,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:01:52,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:01:52,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:01:52,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:02:25,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 749 [2023-08-30 00:02:25,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 156 transitions, 1645 flow. Second operand has 24 states, 24 states have (on average 290.0) internal successors, (6960), 24 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:25,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:02:25,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 749 [2023-08-30 00:02:25,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:02:38,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:40,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:42,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:44,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:46,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:48,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:50,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:52,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:54,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:56,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:03:02,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:03:04,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:03:06,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:03:08,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:03:10,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:03:12,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:03:14,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:03:16,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:03:18,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:03:20,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:03:41,388 INFO L130 PetriNetUnfolder]: 66333/87495 cut-off events. [2023-08-30 00:03:41,388 INFO L131 PetriNetUnfolder]: For 256772/260895 co-relation queries the response was YES. [2023-08-30 00:03:42,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294648 conditions, 87495 events. 66333/87495 cut-off events. For 256772/260895 co-relation queries the response was YES. Maximal size of possible extension queue 3859. Compared 570830 event pairs, 34865 based on Foata normal form. 4146/57700 useless extension candidates. Maximal degree in co-relation 294595. Up to 23041 conditions per place. [2023-08-30 00:03:42,401 INFO L137 encePairwiseOnDemand]: 739/749 looper letters, 376 selfloop transitions, 120 changer transitions 0/508 dead transitions. [2023-08-30 00:03:42,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 508 transitions, 4426 flow [2023-08-30 00:03:42,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:03:42,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:03:42,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 7383 transitions. [2023-08-30 00:03:42,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2023-08-30 00:03:42,411 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 7383 transitions. [2023-08-30 00:03:42,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 7383 transitions. [2023-08-30 00:03:42,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:42,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 7383 transitions. [2023-08-30 00:03:42,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 307.625) internal successors, (7383), 24 states have internal predecessors, (7383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:42,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 749.0) internal successors, (18725), 25 states have internal predecessors, (18725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:42,435 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 749.0) internal successors, (18725), 25 states have internal predecessors, (18725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:42,435 INFO L175 Difference]: Start difference. First operand has 143 places, 156 transitions, 1645 flow. Second operand 24 states and 7383 transitions. [2023-08-30 00:03:42,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 508 transitions, 4426 flow [2023-08-30 00:03:45,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 508 transitions, 4291 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-30 00:03:45,880 INFO L231 Difference]: Finished difference. Result has 179 places, 190 transitions, 2313 flow [2023-08-30 00:03:45,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=1544, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2313, PETRI_PLACES=179, PETRI_TRANSITIONS=190} [2023-08-30 00:03:45,880 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 116 predicate places. [2023-08-30 00:03:45,881 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 190 transitions, 2313 flow [2023-08-30 00:03:45,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 290.0) internal successors, (6960), 24 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:45,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:45,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:45,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 00:03:46,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:03:46,083 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:03:46,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:46,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1174017191, now seen corresponding path program 1 times [2023-08-30 00:03:46,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:03:46,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641244788] [2023-08-30 00:03:46,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:46,083 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 [2023-08-30 00:03:46,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:03:46,084 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:03:46,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 00:03:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:46,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:03:46,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:03:46,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 00:03:46,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 00:03:46,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:03:46,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 00:03:46,381 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 00:03:46,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 00:03:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:03:46,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:03:46,760 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:03:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:03:46,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:03:46,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641244788] [2023-08-30 00:03:46,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641244788] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:03:46,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:03:46,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:03:46,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925670964] [2023-08-30 00:03:46,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:03:46,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:03:46,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:03:46,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:03:46,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:03:49,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 00:03:52,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 00:03:57,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 749 [2023-08-30 00:03:57,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 190 transitions, 2313 flow. Second operand has 12 states, 12 states have (on average 272.0) internal successors, (3264), 12 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:57,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:57,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 749 [2023-08-30 00:03:57,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:04:01,790 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32))) (.cse1 (bvule (_ bv4 32) (bvmul c_~N~0 (_ bv4 32)))) (.cse0 (bvslt |c_ULTIMATE.start_create_fresh_int_array_~i~3#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|))) (and (or (not .cse0) (bvslt (bvadd (_ bv1 32) |c_ULTIMATE.start_create_fresh_int_array_~i~3#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse1) (or (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_183| (_ BitVec 32))) (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_183|) (_ bv0 1)))) (bvule |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse2)) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_183| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_183|) (_ bv0 1))) (forall ((v_ArrVal_677 (_ BitVec 32))) (bvule .cse2 (select (store |c_#length| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_183| v_ArrVal_677) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))))) (or .cse1 .cse0))) is different from false [2023-08-30 00:04:20,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:04:27,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 00:04:34,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:04:53,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:05:05,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:05:24,738 INFO L130 PetriNetUnfolder]: 162623/218389 cut-off events. [2023-08-30 00:05:24,738 INFO L131 PetriNetUnfolder]: For 705930/716932 co-relation queries the response was YES. [2023-08-30 00:05:28,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752321 conditions, 218389 events. 162623/218389 cut-off events. For 705930/716932 co-relation queries the response was YES. Maximal size of possible extension queue 9224. Compared 1650968 event pairs, 59780 based on Foata normal form. 11072/150770 useless extension candidates. Maximal degree in co-relation 752253. Up to 71713 conditions per place. [2023-08-30 00:05:29,431 INFO L137 encePairwiseOnDemand]: 735/749 looper letters, 409 selfloop transitions, 125 changer transitions 0/544 dead transitions. [2023-08-30 00:05:29,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 544 transitions, 5134 flow [2023-08-30 00:05:29,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 00:05:29,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 00:05:29,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 8746 transitions. [2023-08-30 00:05:29,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37667427537792325 [2023-08-30 00:05:29,444 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 8746 transitions. [2023-08-30 00:05:29,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 8746 transitions. [2023-08-30 00:05:29,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:29,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 8746 transitions. [2023-08-30 00:05:29,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 282.1290322580645) internal successors, (8746), 31 states have internal predecessors, (8746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:29,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 749.0) internal successors, (23968), 32 states have internal predecessors, (23968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:29,477 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 749.0) internal successors, (23968), 32 states have internal predecessors, (23968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:29,478 INFO L175 Difference]: Start difference. First operand has 179 places, 190 transitions, 2313 flow. Second operand 31 states and 8746 transitions. [2023-08-30 00:05:29,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 544 transitions, 5134 flow [2023-08-30 00:05:44,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 544 transitions, 4828 flow, removed 40 selfloop flow, removed 10 redundant places. [2023-08-30 00:05:44,551 INFO L231 Difference]: Finished difference. Result has 213 places, 231 transitions, 2880 flow [2023-08-30 00:05:44,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2880, PETRI_PLACES=213, PETRI_TRANSITIONS=231} [2023-08-30 00:05:44,552 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 150 predicate places. [2023-08-30 00:05:44,552 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 231 transitions, 2880 flow [2023-08-30 00:05:44,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 272.0) internal successors, (3264), 12 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:44,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:44,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:44,570 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 (20)] Ended with exit code 0 [2023-08-30 00:05:44,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:05:44,764 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:05:44,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:44,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1174017190, now seen corresponding path program 1 times [2023-08-30 00:05:44,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:05:44,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980491530] [2023-08-30 00:05:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:44,765 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 [2023-08-30 00:05:44,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:05:44,767 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:05:44,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 00:05:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:44,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:05:44,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:44,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 00:05:45,012 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 00:05:45,013 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 [2023-08-30 00:05:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 00:05:45,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:05:45,040 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:05:45,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980491530] [2023-08-30 00:05:45,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980491530] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:05:45,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:05:45,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:05:45,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680143589] [2023-08-30 00:05:45,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:45,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:05:45,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:05:45,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:05:45,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:05:45,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 749 [2023-08-30 00:05:45,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 231 transitions, 2880 flow. Second operand has 4 states, 4 states have (on average 297.75) internal successors, (1191), 4 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:45,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:45,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 749 [2023-08-30 00:05:45,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:06:11,365 INFO L130 PetriNetUnfolder]: 87331/119873 cut-off events. [2023-08-30 00:06:11,366 INFO L131 PetriNetUnfolder]: For 521303/532431 co-relation queries the response was YES. [2023-08-30 00:06:13,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495506 conditions, 119873 events. 87331/119873 cut-off events. For 521303/532431 co-relation queries the response was YES. Maximal size of possible extension queue 5190. Compared 889405 event pairs, 52577 based on Foata normal form. 21919/104755 useless extension candidates. Maximal degree in co-relation 495423. Up to 118773 conditions per place. [2023-08-30 00:06:13,788 INFO L137 encePairwiseOnDemand]: 745/749 looper letters, 180 selfloop transitions, 30 changer transitions 0/229 dead transitions. [2023-08-30 00:06:13,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 229 transitions, 3292 flow [2023-08-30 00:06:13,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:06:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:06:13,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1216 transitions. [2023-08-30 00:06:13,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40587449933244324 [2023-08-30 00:06:13,791 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1216 transitions. [2023-08-30 00:06:13,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1216 transitions. [2023-08-30 00:06:13,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:06:13,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1216 transitions. [2023-08-30 00:06:13,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:13,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 749.0) internal successors, (3745), 5 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:13,795 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 749.0) internal successors, (3745), 5 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:13,795 INFO L175 Difference]: Start difference. First operand has 213 places, 231 transitions, 2880 flow. Second operand 4 states and 1216 transitions. [2023-08-30 00:06:13,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 229 transitions, 3292 flow [2023-08-30 00:06:24,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 229 transitions, 3256 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-08-30 00:06:24,405 INFO L231 Difference]: Finished difference. Result has 213 places, 229 transitions, 2896 flow [2023-08-30 00:06:24,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=2836, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2896, PETRI_PLACES=213, PETRI_TRANSITIONS=229} [2023-08-30 00:06:24,405 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 150 predicate places. [2023-08-30 00:06:24,405 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 229 transitions, 2896 flow [2023-08-30 00:06:24,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 297.75) internal successors, (1191), 4 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:24,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:06:24,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:06:24,414 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 (21)] Ended with exit code 0 [2023-08-30 00:06:24,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:06:24,606 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:06:24,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:06:24,607 INFO L85 PathProgramCache]: Analyzing trace with hash 2034805261, now seen corresponding path program 1 times [2023-08-30 00:06:24,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:06:24,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137888631] [2023-08-30 00:06:24,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:06:24,607 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 [2023-08-30 00:06:24,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:06:24,608 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:06:24,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 00:06:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:06:24,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:06:24,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:06:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:06:24,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:06:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:06:24,932 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:06:24,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137888631] [2023-08-30 00:06:24,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137888631] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:06:24,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:06:24,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:06:24,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702949462] [2023-08-30 00:06:24,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:06:24,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:06:24,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:06:24,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:06:24,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:06:26,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 749 [2023-08-30 00:06:26,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 229 transitions, 2896 flow. Second operand has 12 states, 12 states have (on average 294.1666666666667) internal successors, (3530), 12 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:26,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:06:26,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 749 [2023-08-30 00:06:26,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand