./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-prod-cons3.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-prod-cons3.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 841ea5a5ca051cc33dfe29d877ccdea4b63526a0ee61a2de18869a9ba1858c4b --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 [2023-08-30 00:50:39,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:50:39,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:50:39,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:50:39,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:50:39,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:50:39,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:50:39,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:50:39,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:50:39,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:50:39,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:50:39,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:50:39,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:50:39,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:50:39,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:50:39,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:50:39,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:50:39,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:50:39,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:50:39,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:50:39,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:50:39,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:50:39,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:50:39,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:50:39,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:50:39,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:50:39,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:50:39,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:50:39,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:50:39,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:50:39,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:50:39,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:50:39,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:50:39,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:50:39,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:50:39,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:50:39,177 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:50:39,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:50:39,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:50:39,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:50:39,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:50:39,180 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:50:39,200 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:50:39,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:50:39,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:50:39,201 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:50:39,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:50:39,202 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:50:39,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:50:39,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:50:39,203 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:50:39,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:50:39,204 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:50:39,204 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:50:39,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:50:39,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:50:39,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:50:39,205 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:50:39,205 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:50:39,205 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:50:39,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:50:39,205 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:50:39,205 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:50:39,206 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:50:39,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:50:39,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:50:39,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:50:39,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:50:39,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:50:39,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:50:39,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:50:39,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:50:39,207 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:50:39,208 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:50:39,208 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:50:39,208 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:50:39,208 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 841ea5a5ca051cc33dfe29d877ccdea4b63526a0ee61a2de18869a9ba1858c4b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:50:39,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:50:39,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:50:39,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:50:39,528 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:50:39,529 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:50:39,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c [2023-08-30 00:50:40,744 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:50:40,984 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:50:40,985 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c [2023-08-30 00:50:40,991 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6daa32252/660b7b69ea9d44dbbe7b2937da8b8ca6/FLAG4226f00ac [2023-08-30 00:50:41,004 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6daa32252/660b7b69ea9d44dbbe7b2937da8b8ca6 [2023-08-30 00:50:41,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:50:41,007 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:50:41,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:50:41,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:50:41,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:50:41,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:50:41" (1/1) ... [2023-08-30 00:50:41,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@328bc356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:41, skipping insertion in model container [2023-08-30 00:50:41,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:50:41" (1/1) ... [2023-08-30 00:50:41,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:50:41,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:50:41,205 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-prod-cons3.wvr.c[4007,4020] [2023-08-30 00:50:41,222 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:50:41,235 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) [2023-08-30 00:50:41,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5a11a90e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:41, skipping insertion in model container [2023-08-30 00:50:41,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:50:41,238 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:50:41,240 INFO L158 Benchmark]: Toolchain (without parser) took 231.82ms. Allocated memory is still 81.8MB. Free memory was 59.6MB in the beginning and 49.3MB in the end (delta: 10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 00:50:41,241 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 58.7MB. Free memory is still 36.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:50:41,242 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.31ms. Allocated memory is still 81.8MB. Free memory was 59.4MB in the beginning and 49.6MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 00:50:41,243 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 58.7MB. Free memory is still 36.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 230.31ms. Allocated memory is still 81.8MB. Free memory was 59.4MB in the beginning and 49.6MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 159]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-prod-cons3.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 841ea5a5ca051cc33dfe29d877ccdea4b63526a0ee61a2de18869a9ba1858c4b --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 [2023-08-30 00:50:42,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:50:42,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:50:42,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:50:42,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:50:42,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:50:42,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:50:42,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:50:42,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:50:43,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:50:43,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:50:43,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:50:43,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:50:43,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:50:43,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:50:43,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:50:43,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:50:43,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:50:43,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:50:43,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:50:43,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:50:43,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:50:43,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:50:43,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:50:43,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:50:43,033 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:50:43,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:50:43,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:50:43,035 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:50:43,036 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:50:43,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:50:43,038 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:50:43,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:50:43,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:50:43,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:50:43,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:50:43,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:50:43,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:50:43,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:50:43,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:50:43,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:50:43,045 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:50:43,077 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:50:43,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:50:43,078 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:50:43,079 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:50:43,079 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:50:43,080 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:50:43,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:50:43,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:50:43,081 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:50:43,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:50:43,082 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:50:43,082 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:50:43,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:50:43,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:50:43,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:50:43,083 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:50:43,083 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:50:43,083 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:50:43,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:50:43,083 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:50:43,084 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:50:43,084 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:50:43,084 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:50:43,084 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:50:43,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:50:43,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:50:43,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:50:43,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:50:43,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:50:43,085 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:50:43,086 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:50:43,086 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:50:43,086 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:50:43,086 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:50:43,086 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:50:43,087 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:50:43,087 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:50:43,087 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 841ea5a5ca051cc33dfe29d877ccdea4b63526a0ee61a2de18869a9ba1858c4b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:50:43,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:50:43,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:50:43,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:50:43,401 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:50:43,401 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:50:43,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c [2023-08-30 00:50:44,442 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:50:44,659 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:50:44,659 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c [2023-08-30 00:50:44,665 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/231d1ee3b/eb803c023e3f4e5bbde2fed304be374c/FLAGe00be9ba0 [2023-08-30 00:50:44,678 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/231d1ee3b/eb803c023e3f4e5bbde2fed304be374c [2023-08-30 00:50:44,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:50:44,681 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:50:44,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:50:44,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:50:44,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:50:44,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:50:44" (1/1) ... [2023-08-30 00:50:44,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1479d403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:44, skipping insertion in model container [2023-08-30 00:50:44,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:50:44" (1/1) ... [2023-08-30 00:50:44,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:50:44,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:50:44,898 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-prod-cons3.wvr.c[4007,4020] [2023-08-30 00:50:44,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:50:44,932 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:50:44,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:50:44,972 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-prod-cons3.wvr.c[4007,4020] [2023-08-30 00:50:44,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:50:44,989 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:50:45,029 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-prod-cons3.wvr.c[4007,4020] [2023-08-30 00:50:45,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:50:45,046 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:50:45,047 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:50:45,052 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:50:45,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:45 WrapperNode [2023-08-30 00:50:45,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:50:45,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:50:45,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:50:45,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:50:45,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:45" (1/1) ... [2023-08-30 00:50:45,081 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:45" (1/1) ... [2023-08-30 00:50:45,125 INFO L138 Inliner]: procedures = 28, calls = 73, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 267 [2023-08-30 00:50:45,126 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:50:45,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:50:45,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:50:45,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:50:45,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:45" (1/1) ... [2023-08-30 00:50:45,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:45" (1/1) ... [2023-08-30 00:50:45,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:45" (1/1) ... [2023-08-30 00:50:45,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:45" (1/1) ... [2023-08-30 00:50:45,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:45" (1/1) ... [2023-08-30 00:50:45,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:45" (1/1) ... [2023-08-30 00:50:45,193 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:45" (1/1) ... [2023-08-30 00:50:45,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:45" (1/1) ... [2023-08-30 00:50:45,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:50:45,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:50:45,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:50:45,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:50:45,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:45" (1/1) ... [2023-08-30 00:50:45,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:50:45,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:50:45,238 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) [2023-08-30 00:50:45,253 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 [2023-08-30 00:50:45,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:50:45,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:50:45,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:50:45,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:50:45,279 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:50:45,279 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:50:45,279 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:50:45,280 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:50:45,280 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:50:45,280 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:50:45,280 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 00:50:45,280 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 00:50:45,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:50:45,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:50:45,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:50:45,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:50:45,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:50:45,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:50:45,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:50:45,283 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:50:45,438 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:50:45,439 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:50:45,930 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:50:46,036 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:50:46,036 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 00:50:46,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:50:46 BoogieIcfgContainer [2023-08-30 00:50:46,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:50:46,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:50:46,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:50:46,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:50:46,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:50:44" (1/3) ... [2023-08-30 00:50:46,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1affe910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:50:46, skipping insertion in model container [2023-08-30 00:50:46,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:45" (2/3) ... [2023-08-30 00:50:46,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1affe910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:50:46, skipping insertion in model container [2023-08-30 00:50:46,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:50:46" (3/3) ... [2023-08-30 00:50:46,046 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons3.wvr.c [2023-08-30 00:50:46,061 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:50:46,061 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-30 00:50:46,061 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:50:46,130 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 00:50:46,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 252 transitions, 536 flow [2023-08-30 00:50:46,261 INFO L130 PetriNetUnfolder]: 18/248 cut-off events. [2023-08-30 00:50:46,261 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 00:50:46,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 248 events. 18/248 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 252 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 205. Up to 3 conditions per place. [2023-08-30 00:50:46,266 INFO L82 GeneralOperation]: Start removeDead. Operand has 247 places, 252 transitions, 536 flow [2023-08-30 00:50:46,275 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 239 places, 244 transitions, 512 flow [2023-08-30 00:50:46,284 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:50:46,296 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 239 places, 244 transitions, 512 flow [2023-08-30 00:50:46,298 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 239 places, 244 transitions, 512 flow [2023-08-30 00:50:46,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 244 transitions, 512 flow [2023-08-30 00:50:46,335 INFO L130 PetriNetUnfolder]: 18/244 cut-off events. [2023-08-30 00:50:46,336 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 00:50:46,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 244 events. 18/244 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 250 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 205. Up to 3 conditions per place. [2023-08-30 00:50:46,340 INFO L119 LiptonReduction]: Number of co-enabled transitions 3744 [2023-08-30 00:51:17,258 WARN L222 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 147 DAG size of output: 144 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 00:51:18,879 INFO L134 LiptonReduction]: Checked pairs total: 8241 [2023-08-30 00:51:18,880 INFO L136 LiptonReduction]: Total number of compositions: 258 [2023-08-30 00:51:18,891 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:51:18,895 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;@667530a5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:51:18,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2023-08-30 00:51:18,899 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:51:18,899 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:51:18,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:18,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:51:18,900 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:51:18,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:18,905 INFO L85 PathProgramCache]: Analyzing trace with hash 34059, now seen corresponding path program 1 times [2023-08-30 00:51:18,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:18,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549094423] [2023-08-30 00:51:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:18,916 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 00:51:18,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:18,925 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) [2023-08-30 00:51:18,971 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 [2023-08-30 00:51:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:19,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:51:19,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:19,269 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 00:51:19,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 00:51:19,321 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 00:51:19,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:51:19,322 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:19,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549094423] [2023-08-30 00:51:19,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549094423] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:51:19,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:51:19,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:51:19,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217349337] [2023-08-30 00:51:19,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:51:19,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:51:19,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:19,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:51:19,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:51:19,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 510 [2023-08-30 00:51:19,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 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 00:51:19,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:19,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 510 [2023-08-30 00:51:19,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:22,219 INFO L130 PetriNetUnfolder]: 15527/20422 cut-off events. [2023-08-30 00:51:22,220 INFO L131 PetriNetUnfolder]: For 557/557 co-relation queries the response was YES. [2023-08-30 00:51:22,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41202 conditions, 20422 events. 15527/20422 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 1348. Compared 108319 event pairs, 12002 based on Foata normal form. 0/9278 useless extension candidates. Maximal degree in co-relation 37919. Up to 19881 conditions per place. [2023-08-30 00:51:22,375 INFO L137 encePairwiseOnDemand]: 506/510 looper letters, 58 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-08-30 00:51:22,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 62 transitions, 266 flow [2023-08-30 00:51:22,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:51:22,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:51:22,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2023-08-30 00:51:22,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44640522875816996 [2023-08-30 00:51:22,391 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2023-08-30 00:51:22,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2023-08-30 00:51:22,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:22,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2023-08-30 00:51:22,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 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 00:51:22,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 510.0) internal successors, (2040), 4 states have internal predecessors, (2040), 0 states have call successors, (0), 0 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 00:51:22,411 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 510.0) internal successors, (2040), 4 states have internal predecessors, (2040), 0 states have call successors, (0), 0 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 00:51:22,413 INFO L175 Difference]: Start difference. First operand has 73 places, 65 transitions, 154 flow. Second operand 3 states and 683 transitions. [2023-08-30 00:51:22,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 62 transitions, 266 flow [2023-08-30 00:51:22,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 250 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 00:51:22,444 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 134 flow [2023-08-30 00:51:22,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=510, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2023-08-30 00:51:22,449 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -9 predicate places. [2023-08-30 00:51:22,450 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 134 flow [2023-08-30 00:51:22,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 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 00:51:22,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:22,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:51:22,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 00:51:22,660 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 [2023-08-30 00:51:22,661 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:51:22,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:22,661 INFO L85 PathProgramCache]: Analyzing trace with hash 34060, now seen corresponding path program 1 times [2023-08-30 00:51:22,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:22,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952334210] [2023-08-30 00:51:22,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:22,662 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 00:51:22,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:22,664 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) [2023-08-30 00:51:22,669 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 [2023-08-30 00:51:22,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:22,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:51:22,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:22,935 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:51:22,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:51:22,990 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 00:51:22,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:51:22,991 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:22,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952334210] [2023-08-30 00:51:22,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952334210] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:51:22,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:51:22,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:51:22,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516069757] [2023-08-30 00:51:22,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:51:22,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:51:22,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:22,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:51:22,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:51:23,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 510 [2023-08-30 00:51:23,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 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 00:51:23,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:23,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 510 [2023-08-30 00:51:23,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:26,751 INFO L130 PetriNetUnfolder]: 31053/40841 cut-off events. [2023-08-30 00:51:26,752 INFO L131 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2023-08-30 00:51:26,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81374 conditions, 40841 events. 31053/40841 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 2696. Compared 238487 event pairs, 24004 based on Foata normal form. 0/18558 useless extension candidates. Maximal degree in co-relation 81368. Up to 19882 conditions per place. [2023-08-30 00:51:26,993 INFO L137 encePairwiseOnDemand]: 504/510 looper letters, 111 selfloop transitions, 4 changer transitions 0/118 dead transitions. [2023-08-30 00:51:26,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 118 transitions, 484 flow [2023-08-30 00:51:26,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:51:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:51:26,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 738 transitions. [2023-08-30 00:51:26,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823529411764706 [2023-08-30 00:51:26,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 738 transitions. [2023-08-30 00:51:26,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 738 transitions. [2023-08-30 00:51:26,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:26,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 738 transitions. [2023-08-30 00:51:27,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 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 00:51:27,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 510.0) internal successors, (2040), 4 states have internal predecessors, (2040), 0 states have call successors, (0), 0 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 00:51:27,007 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 510.0) internal successors, (2040), 4 states have internal predecessors, (2040), 0 states have call successors, (0), 0 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 00:51:27,007 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 134 flow. Second operand 3 states and 738 transitions. [2023-08-30 00:51:27,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 118 transitions, 484 flow [2023-08-30 00:51:27,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 118 transitions, 483 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:51:27,011 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 165 flow [2023-08-30 00:51:27,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=510, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2023-08-30 00:51:27,012 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -6 predicate places. [2023-08-30 00:51:27,013 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 165 flow [2023-08-30 00:51:27,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 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 00:51:27,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:27,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:51:27,025 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 [2023-08-30 00:51:27,223 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 [2023-08-30 00:51:27,224 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:51:27,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:27,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1059602, now seen corresponding path program 1 times [2023-08-30 00:51:27,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:27,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799168612] [2023-08-30 00:51:27,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:27,225 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 00:51:27,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:27,227 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) [2023-08-30 00:51:27,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 00:51:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:27,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:51:27,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:27,459 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:51:27,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:51:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:27,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:51:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:27,703 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:27,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799168612] [2023-08-30 00:51:27,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799168612] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:51:27,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:51:27,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:51:27,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171813348] [2023-08-30 00:51:27,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:51:27,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:51:27,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:27,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:51:27,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:51:28,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 510 [2023-08-30 00:51:28,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 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 00:51:28,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:28,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 510 [2023-08-30 00:51:28,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:33,648 INFO L130 PetriNetUnfolder]: 46587/61272 cut-off events. [2023-08-30 00:51:33,648 INFO L131 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2023-08-30 00:51:33,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122106 conditions, 61272 events. 46587/61272 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 3795. Compared 373619 event pairs, 36006 based on Foata normal form. 0/27855 useless extension candidates. Maximal degree in co-relation 122097. Up to 19883 conditions per place. [2023-08-30 00:51:34,004 INFO L137 encePairwiseOnDemand]: 501/510 looper letters, 164 selfloop transitions, 19 changer transitions 0/186 dead transitions. [2023-08-30 00:51:34,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 186 transitions, 813 flow [2023-08-30 00:51:34,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:51:34,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:51:34,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1371 transitions. [2023-08-30 00:51:34,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44803921568627453 [2023-08-30 00:51:34,010 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1371 transitions. [2023-08-30 00:51:34,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1371 transitions. [2023-08-30 00:51:34,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:34,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1371 transitions. [2023-08-30 00:51:34,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 228.5) internal successors, (1371), 6 states have internal predecessors, (1371), 0 states have call successors, (0), 0 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 00:51:34,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 510.0) internal successors, (3570), 7 states have internal predecessors, (3570), 0 states have call successors, (0), 0 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 00:51:34,023 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 510.0) internal successors, (3570), 7 states have internal predecessors, (3570), 0 states have call successors, (0), 0 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 00:51:34,024 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 165 flow. Second operand 6 states and 1371 transitions. [2023-08-30 00:51:34,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 186 transitions, 813 flow [2023-08-30 00:51:34,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 186 transitions, 799 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:51:34,029 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 302 flow [2023-08-30 00:51:34,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=510, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2023-08-30 00:51:34,032 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 1 predicate places. [2023-08-30 00:51:34,035 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 302 flow [2023-08-30 00:51:34,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 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 00:51:34,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:34,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:51:34,047 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 [2023-08-30 00:51:34,246 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 [2023-08-30 00:51:34,247 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:51:34,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:34,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1060263, now seen corresponding path program 1 times [2023-08-30 00:51:34,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:34,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395887864] [2023-08-30 00:51:34,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:34,248 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 00:51:34,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:34,249 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) [2023-08-30 00:51:34,250 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 [2023-08-30 00:51:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:34,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:51:34,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:34,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:34,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:34,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:34,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:34,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:34,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:34,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:34,540 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-08-30 00:51:34,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2023-08-30 00:51:34,588 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-08-30 00:51:34,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2023-08-30 00:51:34,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:34,669 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 [2023-08-30 00:51:34,710 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 00:51:34,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:51:34,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:34,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395887864] [2023-08-30 00:51:34,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395887864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:51:34,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:51:34,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:51:34,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643118507] [2023-08-30 00:51:34,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:51:34,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:51:34,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:34,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:51:34,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:51:34,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 510 [2023-08-30 00:51:34,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 302 flow. Second operand has 4 states, 4 states have (on average 212.75) internal successors, (851), 4 states have internal predecessors, (851), 0 states have call successors, (0), 0 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 00:51:34,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:34,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 510 [2023-08-30 00:51:34,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:38,638 INFO L130 PetriNetUnfolder]: 39133/51871 cut-off events. [2023-08-30 00:51:38,638 INFO L131 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2023-08-30 00:51:38,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103352 conditions, 51871 events. 39133/51871 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 3361. Compared 316893 event pairs, 30066 based on Foata normal form. 0/24400 useless extension candidates. Maximal degree in co-relation 103339. Up to 50248 conditions per place. [2023-08-30 00:51:38,911 INFO L137 encePairwiseOnDemand]: 507/510 looper letters, 72 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-08-30 00:51:38,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 76 transitions, 428 flow [2023-08-30 00:51:38,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:51:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:51:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 695 transitions. [2023-08-30 00:51:38,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542483660130719 [2023-08-30 00:51:38,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 695 transitions. [2023-08-30 00:51:38,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 695 transitions. [2023-08-30 00:51:38,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:38,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 695 transitions. [2023-08-30 00:51:38,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 0 states have call successors, (0), 0 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 00:51:38,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 510.0) internal successors, (2040), 4 states have internal predecessors, (2040), 0 states have call successors, (0), 0 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 00:51:38,921 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 510.0) internal successors, (2040), 4 states have internal predecessors, (2040), 0 states have call successors, (0), 0 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 00:51:38,921 INFO L175 Difference]: Start difference. First operand has 74 places, 80 transitions, 302 flow. Second operand 3 states and 695 transitions. [2023-08-30 00:51:38,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 76 transitions, 428 flow [2023-08-30 00:51:38,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 409 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 00:51:38,925 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 265 flow [2023-08-30 00:51:38,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=510, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2023-08-30 00:51:38,926 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 0 predicate places. [2023-08-30 00:51:38,926 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 265 flow [2023-08-30 00:51:38,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 212.75) internal successors, (851), 4 states have internal predecessors, (851), 0 states have call successors, (0), 0 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 00:51:38,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:38,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:51:38,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-08-30 00:51:39,137 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 [2023-08-30 00:51:39,137 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:51:39,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:39,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1060262, now seen corresponding path program 1 times [2023-08-30 00:51:39,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:39,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665559742] [2023-08-30 00:51:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:39,138 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 00:51:39,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:39,140 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) [2023-08-30 00:51:39,141 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 [2023-08-30 00:51:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:39,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:51:39,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:39,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:39,377 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2023-08-30 00:51:39,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2023-08-30 00:51:39,752 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-08-30 00:51:39,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 00:51:39,805 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 00:51:39,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:51:39,805 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:39,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665559742] [2023-08-30 00:51:39,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665559742] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:51:39,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:51:39,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:51:39,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631195243] [2023-08-30 00:51:39,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:51:39,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:51:39,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:39,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:51:39,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:51:40,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 510 [2023-08-30 00:51:40,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 265 flow. Second operand has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 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 00:51:40,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:40,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 510 [2023-08-30 00:51:40,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:43,107 INFO L130 PetriNetUnfolder]: 31679/42470 cut-off events. [2023-08-30 00:51:43,107 INFO L131 PetriNetUnfolder]: For 171/171 co-relation queries the response was YES. [2023-08-30 00:51:43,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84531 conditions, 42470 events. 31679/42470 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 2833. Compared 259457 event pairs, 24126 based on Foata normal form. 0/20944 useless extension candidates. Maximal degree in co-relation 84517. Up to 40847 conditions per place. [2023-08-30 00:51:43,344 INFO L137 encePairwiseOnDemand]: 507/510 looper letters, 68 selfloop transitions, 1 changer transitions 0/72 dead transitions. [2023-08-30 00:51:43,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 72 transitions, 383 flow [2023-08-30 00:51:43,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:51:43,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:51:43,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 687 transitions. [2023-08-30 00:51:43,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44901960784313727 [2023-08-30 00:51:43,348 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 687 transitions. [2023-08-30 00:51:43,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 687 transitions. [2023-08-30 00:51:43,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:43,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 687 transitions. [2023-08-30 00:51:43,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 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 00:51:43,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 510.0) internal successors, (2040), 4 states have internal predecessors, (2040), 0 states have call successors, (0), 0 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 00:51:43,354 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 510.0) internal successors, (2040), 4 states have internal predecessors, (2040), 0 states have call successors, (0), 0 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 00:51:43,354 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 265 flow. Second operand 3 states and 687 transitions. [2023-08-30 00:51:43,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 72 transitions, 383 flow [2023-08-30 00:51:43,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 72 transitions, 382 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:51:43,357 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 246 flow [2023-08-30 00:51:43,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=510, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2023-08-30 00:51:43,358 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -1 predicate places. [2023-08-30 00:51:43,358 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 246 flow [2023-08-30 00:51:43,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 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 00:51:43,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:43,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:51:43,367 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 (6)] Ended with exit code 0 [2023-08-30 00:51:43,563 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 [2023-08-30 00:51:43,563 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:51:43,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:43,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1018938690, now seen corresponding path program 1 times [2023-08-30 00:51:43,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:43,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495695552] [2023-08-30 00:51:43,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:43,564 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 00:51:43,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:43,565 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) [2023-08-30 00:51:43,566 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 [2023-08-30 00:51:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:43,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:51:43,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:43,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:43,802 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2023-08-30 00:51:43,802 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 7 case distinctions, treesize of input 49 treesize of output 74 [2023-08-30 00:51:44,792 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2023-08-30 00:51:44,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2023-08-30 00:51:45,228 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 00:51:45,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:51:45,229 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:45,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495695552] [2023-08-30 00:51:45,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495695552] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:51:45,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:51:45,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:51:45,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010770483] [2023-08-30 00:51:45,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:51:45,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:51:45,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:45,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:51:45,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:51:45,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 510 [2023-08-30 00:51:45,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 00:51:45,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:45,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 510 [2023-08-30 00:51:45,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:48,573 INFO L130 PetriNetUnfolder]: 30899/41348 cut-off events. [2023-08-30 00:51:48,573 INFO L131 PetriNetUnfolder]: For 171/171 co-relation queries the response was YES. [2023-08-30 00:51:48,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82288 conditions, 41348 events. 30899/41348 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 2831. Compared 251824 event pairs, 23394 based on Foata normal form. 0/20521 useless extension candidates. Maximal degree in co-relation 82273. Up to 39725 conditions per place. [2023-08-30 00:51:48,778 INFO L137 encePairwiseOnDemand]: 507/510 looper letters, 66 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2023-08-30 00:51:48,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 70 transitions, 376 flow [2023-08-30 00:51:48,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:51:48,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:51:48,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 685 transitions. [2023-08-30 00:51:48,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4477124183006536 [2023-08-30 00:51:48,781 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 685 transitions. [2023-08-30 00:51:48,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 685 transitions. [2023-08-30 00:51:48,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:48,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 685 transitions. [2023-08-30 00:51:48,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 0 states have call successors, (0), 0 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 00:51:48,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 510.0) internal successors, (2040), 4 states have internal predecessors, (2040), 0 states have call successors, (0), 0 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 00:51:48,786 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 510.0) internal successors, (2040), 4 states have internal predecessors, (2040), 0 states have call successors, (0), 0 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 00:51:48,786 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 246 flow. Second operand 3 states and 685 transitions. [2023-08-30 00:51:48,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 70 transitions, 376 flow [2023-08-30 00:51:48,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 70 transitions, 375 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:51:48,788 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 243 flow [2023-08-30 00:51:48,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=510, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=243, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2023-08-30 00:51:48,789 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -2 predicate places. [2023-08-30 00:51:48,789 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 243 flow [2023-08-30 00:51:48,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 00:51:48,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:48,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:51:48,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:49,004 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 [2023-08-30 00:51:49,005 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:51:49,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:49,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1018938691, now seen corresponding path program 1 times [2023-08-30 00:51:49,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:49,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723385595] [2023-08-30 00:51:49,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:49,006 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 00:51:49,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:49,007 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) [2023-08-30 00:51:49,011 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 [2023-08-30 00:51:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:49,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:51:49,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:49,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:49,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:49,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:49,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:49,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:49,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:49,224 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-30 00:51:49,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2023-08-30 00:51:49,252 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 00:51:49,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2023-08-30 00:51:49,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:49,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:51:49,352 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 00:51:49,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:51:49,353 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:49,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723385595] [2023-08-30 00:51:49,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723385595] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:51:49,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:51:49,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:51:49,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755440626] [2023-08-30 00:51:49,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:51:49,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:51:49,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:49,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:51:49,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:51:49,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 510 [2023-08-30 00:51:49,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 243 flow. Second operand has 4 states, 4 states have (on average 213.25) internal successors, (853), 4 states have internal predecessors, (853), 0 states have call successors, (0), 0 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 00:51:49,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:49,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 510 [2023-08-30 00:51:49,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:52,437 INFO L130 PetriNetUnfolder]: 30119/40226 cut-off events. [2023-08-30 00:51:52,437 INFO L131 PetriNetUnfolder]: For 171/171 co-relation queries the response was YES. [2023-08-30 00:51:52,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80045 conditions, 40226 events. 30119/40226 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 2829. Compared 244463 event pairs, 22662 based on Foata normal form. 0/20098 useless extension candidates. Maximal degree in co-relation 80029. Up to 38603 conditions per place. [2023-08-30 00:51:52,643 INFO L137 encePairwiseOnDemand]: 507/510 looper letters, 64 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2023-08-30 00:51:52,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 369 flow [2023-08-30 00:51:52,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:51:52,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:51:52,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 689 transitions. [2023-08-30 00:51:52,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503267973856209 [2023-08-30 00:51:52,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 689 transitions. [2023-08-30 00:51:52,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 689 transitions. [2023-08-30 00:51:52,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:52,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 689 transitions. [2023-08-30 00:51:52,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 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 00:51:52,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 510.0) internal successors, (2040), 4 states have internal predecessors, (2040), 0 states have call successors, (0), 0 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 00:51:52,649 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 510.0) internal successors, (2040), 4 states have internal predecessors, (2040), 0 states have call successors, (0), 0 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 00:51:52,649 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 243 flow. Second operand 3 states and 689 transitions. [2023-08-30 00:51:52,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 369 flow [2023-08-30 00:51:52,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 68 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:51:52,651 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 240 flow [2023-08-30 00:51:52,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=510, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2023-08-30 00:51:52,651 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -3 predicate places. [2023-08-30 00:51:52,651 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 240 flow [2023-08-30 00:51:52,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 213.25) internal successors, (853), 4 states have internal predecessors, (853), 0 states have call successors, (0), 0 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 00:51:52,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:52,652 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:51:52,659 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 [2023-08-30 00:51:52,852 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 [2023-08-30 00:51:52,853 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:51:52,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:52,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1505547916, now seen corresponding path program 2 times [2023-08-30 00:51:52,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:52,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460412362] [2023-08-30 00:51:52,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:51:52,854 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 00:51:52,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:52,855 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) [2023-08-30 00:51:52,855 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 [2023-08-30 00:51:52,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:51:52,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:51:52,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:51:52,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:53,055 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:51:53,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:51:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:53,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:51:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:53,695 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:53,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460412362] [2023-08-30 00:51:53,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460412362] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:51:53,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:51:53,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:51:53,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971155771] [2023-08-30 00:51:53,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:51:53,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:51:53,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:53,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:51:53,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:51:57,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 510 [2023-08-30 00:51:57,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 240 flow. Second operand has 12 states, 12 states have (on average 200.0) internal successors, (2400), 12 states have internal predecessors, (2400), 0 states have call successors, (0), 0 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 00:51:57,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:57,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 510 [2023-08-30 00:51:57,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:59,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:52:01,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:52:03,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:52:05,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:52:07,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:52:18,577 INFO L130 PetriNetUnfolder]: 90346/120654 cut-off events. [2023-08-30 00:52:18,577 INFO L131 PetriNetUnfolder]: For 528/528 co-relation queries the response was YES. [2023-08-30 00:52:18,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240010 conditions, 120654 events. 90346/120654 cut-off events. For 528/528 co-relation queries the response was YES. Maximal size of possible extension queue 5358. Compared 799355 event pairs, 67986 based on Foata normal form. 11/60277 useless extension candidates. Maximal degree in co-relation 239993. Up to 12873 conditions per place. [2023-08-30 00:52:19,260 INFO L137 encePairwiseOnDemand]: 503/510 looper letters, 410 selfloop transitions, 31 changer transitions 0/444 dead transitions. [2023-08-30 00:52:19,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 444 transitions, 2034 flow [2023-08-30 00:52:19,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:52:19,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:52:19,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2840 transitions. [2023-08-30 00:52:19,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46405228758169936 [2023-08-30 00:52:19,268 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2840 transitions. [2023-08-30 00:52:19,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2840 transitions. [2023-08-30 00:52:19,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:52:19,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2840 transitions. [2023-08-30 00:52:19,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 236.66666666666666) internal successors, (2840), 12 states have internal predecessors, (2840), 0 states have call successors, (0), 0 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 00:52:19,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 510.0) internal successors, (6630), 13 states have internal predecessors, (6630), 0 states have call successors, (0), 0 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 00:52:19,283 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 510.0) internal successors, (6630), 13 states have internal predecessors, (6630), 0 states have call successors, (0), 0 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 00:52:19,284 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 240 flow. Second operand 12 states and 2840 transitions. [2023-08-30 00:52:19,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 444 transitions, 2034 flow [2023-08-30 00:52:19,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 444 transitions, 2033 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:52:19,290 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 471 flow [2023-08-30 00:52:19,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=510, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=471, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2023-08-30 00:52:19,291 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 14 predicate places. [2023-08-30 00:52:19,291 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 471 flow [2023-08-30 00:52:19,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 200.0) internal successors, (2400), 12 states have internal predecessors, (2400), 0 states have call successors, (0), 0 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 00:52:19,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:52:19,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:52:19,306 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 [2023-08-30 00:52:19,502 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 [2023-08-30 00:52:19,502 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:52:19,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:52:19,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1522320967, now seen corresponding path program 1 times [2023-08-30 00:52:19,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:52:19,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576306680] [2023-08-30 00:52:19,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:52:19,503 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 00:52:19,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:52:19,504 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) [2023-08-30 00:52:19,505 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 [2023-08-30 00:52:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:52:19,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:52:19,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:52:19,630 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 00:52:19,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:52:19,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:52:19,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576306680] [2023-08-30 00:52:19,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576306680] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:52:19,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:52:19,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:52:19,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639217983] [2023-08-30 00:52:19,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:52:19,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:52:19,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:52:19,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:52:19,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:52:19,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 510 [2023-08-30 00:52:19,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 471 flow. Second operand has 4 states, 4 states have (on average 210.25) internal successors, (841), 4 states have internal predecessors, (841), 0 states have call successors, (0), 0 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 00:52:19,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:52:19,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 510 [2023-08-30 00:52:19,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:52:30,292 INFO L130 PetriNetUnfolder]: 101561/137739 cut-off events. [2023-08-30 00:52:30,292 INFO L131 PetriNetUnfolder]: For 741/741 co-relation queries the response was YES. [2023-08-30 00:52:30,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274110 conditions, 137739 events. 101561/137739 cut-off events. For 741/741 co-relation queries the response was YES. Maximal size of possible extension queue 6003. Compared 960847 event pairs, 78795 based on Foata normal form. 1422/73487 useless extension candidates. Maximal degree in co-relation 274085. Up to 115784 conditions per place. [2023-08-30 00:52:31,406 INFO L137 encePairwiseOnDemand]: 499/510 looper letters, 129 selfloop transitions, 3 changer transitions 0/135 dead transitions. [2023-08-30 00:52:31,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 135 transitions, 952 flow [2023-08-30 00:52:31,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:52:31,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:52:31,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 934 transitions. [2023-08-30 00:52:31,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45784313725490194 [2023-08-30 00:52:31,409 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 934 transitions. [2023-08-30 00:52:31,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 934 transitions. [2023-08-30 00:52:31,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:52:31,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 934 transitions. [2023-08-30 00:52:31,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 233.5) internal successors, (934), 4 states have internal predecessors, (934), 0 states have call successors, (0), 0 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 00:52:31,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 510.0) internal successors, (2550), 5 states have internal predecessors, (2550), 0 states have call successors, (0), 0 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 00:52:31,415 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 510.0) internal successors, (2550), 5 states have internal predecessors, (2550), 0 states have call successors, (0), 0 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 00:52:31,415 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 471 flow. Second operand 4 states and 934 transitions. [2023-08-30 00:52:31,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 135 transitions, 952 flow [2023-08-30 00:52:31,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 135 transitions, 869 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-08-30 00:52:31,420 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 433 flow [2023-08-30 00:52:31,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=510, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=433, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2023-08-30 00:52:31,421 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 14 predicate places. [2023-08-30 00:52:31,421 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 433 flow [2023-08-30 00:52:31,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 210.25) internal successors, (841), 4 states have internal predecessors, (841), 0 states have call successors, (0), 0 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 00:52:31,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:52:31,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:52:31,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-08-30 00:52:31,629 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 [2023-08-30 00:52:31,629 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:52:31,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:52:31,629 INFO L85 PathProgramCache]: Analyzing trace with hash -555878067, now seen corresponding path program 1 times [2023-08-30 00:52:31,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:52:31,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578116087] [2023-08-30 00:52:31,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:52:31,630 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 00:52:31,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:52:31,631 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) [2023-08-30 00:52:31,635 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 [2023-08-30 00:52:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:52:31,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:52:31,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:52:31,912 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:52:31,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:52:32,057 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 00:52:32,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 00:52:32,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:52:32,197 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 00:52:32,206 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 00:52:32,206 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 00:52:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:52:32,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:52:37,719 WARN L222 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:52:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:52:39,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:52:39,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578116087] [2023-08-30 00:52:39,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578116087] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:52:39,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:52:39,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:52:39,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793817567] [2023-08-30 00:52:39,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:52:39,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:52:39,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:52:39,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:52:39,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:52:43,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 510 [2023-08-30 00:52:43,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 433 flow. Second operand has 8 states, 8 states have (on average 188.5) internal successors, (1508), 8 states have internal predecessors, (1508), 0 states have call successors, (0), 0 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 00:52:43,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:52:43,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 510 [2023-08-30 00:52:43,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:52:54,376 WARN L222 SmtUtils]: Spent 10.51s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:52:55,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:53:05,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:53:09,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:53:11,902 WARN L539 Checker$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 00:53:45,617 INFO L130 PetriNetUnfolder]: 233323/315261 cut-off events. [2023-08-30 00:53:45,617 INFO L131 PetriNetUnfolder]: For 42598/42598 co-relation queries the response was YES. [2023-08-30 00:53:46,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706398 conditions, 315261 events. 233323/315261 cut-off events. For 42598/42598 co-relation queries the response was YES. Maximal size of possible extension queue 12771. Compared 2359893 event pairs, 179307 based on Foata normal form. 0/200673 useless extension candidates. Maximal degree in co-relation 706371. Up to 115750 conditions per place. [2023-08-30 00:53:48,103 INFO L137 encePairwiseOnDemand]: 501/510 looper letters, 248 selfloop transitions, 31 changer transitions 0/282 dead transitions. [2023-08-30 00:53:48,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 282 transitions, 1653 flow [2023-08-30 00:53:48,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 00:53:48,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 00:53:48,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3044 transitions. [2023-08-30 00:53:48,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39790849673202616 [2023-08-30 00:53:48,111 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3044 transitions. [2023-08-30 00:53:48,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3044 transitions. [2023-08-30 00:53:48,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:53:48,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3044 transitions. [2023-08-30 00:53:48,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 202.93333333333334) internal successors, (3044), 15 states have internal predecessors, (3044), 0 states have call successors, (0), 0 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 00:53:48,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 510.0) internal successors, (8160), 16 states have internal predecessors, (8160), 0 states have call successors, (0), 0 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 00:53:48,141 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 510.0) internal successors, (8160), 16 states have internal predecessors, (8160), 0 states have call successors, (0), 0 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 00:53:48,142 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 433 flow. Second operand 15 states and 3044 transitions. [2023-08-30 00:53:48,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 282 transitions, 1653 flow [2023-08-30 00:53:48,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 282 transitions, 1647 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 00:53:48,165 INFO L231 Difference]: Finished difference. Result has 106 places, 104 transitions, 677 flow [2023-08-30 00:53:48,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=510, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=677, PETRI_PLACES=106, PETRI_TRANSITIONS=104} [2023-08-30 00:53:48,167 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 33 predicate places. [2023-08-30 00:53:48,167 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 104 transitions, 677 flow [2023-08-30 00:53:48,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 188.5) internal successors, (1508), 8 states have internal predecessors, (1508), 0 states have call successors, (0), 0 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 00:53:48,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:53:48,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:53:48,183 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 [2023-08-30 00:53:48,379 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 [2023-08-30 00:53:48,380 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:53:48,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:53:48,380 INFO L85 PathProgramCache]: Analyzing trace with hash -52438515, now seen corresponding path program 1 times [2023-08-30 00:53:48,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:53:48,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857128900] [2023-08-30 00:53:48,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:53:48,381 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 00:53:48,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:53:48,382 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) [2023-08-30 00:53:48,385 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 [2023-08-30 00:53:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:53:48,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 00:53:48,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:53:48,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:53:48,652 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2023-08-30 00:53:48,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2023-08-30 00:53:49,422 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2023-08-30 00:53:49,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2023-08-30 00:53:49,791 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 00:53:49,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:53:49,791 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:53:49,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857128900] [2023-08-30 00:53:49,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857128900] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:53:49,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:53:49,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:53:49,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94562450] [2023-08-30 00:53:49,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:53:49,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:53:49,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:53:49,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:53:49,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:53:50,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 510 [2023-08-30 00:53:50,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 104 transitions, 677 flow. Second operand has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 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 00:53:50,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:53:50,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 510 [2023-08-30 00:53:50,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:54:16,066 INFO L130 PetriNetUnfolder]: 228706/307935 cut-off events. [2023-08-30 00:54:16,067 INFO L131 PetriNetUnfolder]: For 137476/137476 co-relation queries the response was YES. [2023-08-30 00:54:17,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 726111 conditions, 307935 events. 228706/307935 cut-off events. For 137476/137476 co-relation queries the response was YES. Maximal size of possible extension queue 11947. Compared 2271559 event pairs, 176580 based on Foata normal form. 0/207666 useless extension candidates. Maximal degree in co-relation 726077. Up to 297009 conditions per place. [2023-08-30 00:54:19,365 INFO L137 encePairwiseOnDemand]: 507/510 looper letters, 98 selfloop transitions, 1 changer transitions 0/102 dead transitions. [2023-08-30 00:54:19,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 102 transitions, 871 flow [2023-08-30 00:54:19,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:54:19,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:54:19,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 681 transitions. [2023-08-30 00:54:19,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44509803921568625 [2023-08-30 00:54:19,369 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 681 transitions. [2023-08-30 00:54:19,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 681 transitions. [2023-08-30 00:54:19,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:54:19,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 681 transitions. [2023-08-30 00:54:19,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 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 00:54:19,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 510.0) internal successors, (2040), 4 states have internal predecessors, (2040), 0 states have call successors, (0), 0 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 00:54:19,373 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 510.0) internal successors, (2040), 4 states have internal predecessors, (2040), 0 states have call successors, (0), 0 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 00:54:19,373 INFO L175 Difference]: Start difference. First operand has 106 places, 104 transitions, 677 flow. Second operand 3 states and 681 transitions. [2023-08-30 00:54:19,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 102 transitions, 871 flow [2023-08-30 00:54:19,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 102 transitions, 850 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 00:54:19,729 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 654 flow [2023-08-30 00:54:19,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=510, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=654, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2023-08-30 00:54:19,730 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 32 predicate places. [2023-08-30 00:54:19,730 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 654 flow [2023-08-30 00:54:19,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 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 00:54:19,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:54:19,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:54:19,740 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 [2023-08-30 00:54:19,940 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 [2023-08-30 00:54:19,940 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:54:19,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:54:19,941 INFO L85 PathProgramCache]: Analyzing trace with hash -52438516, now seen corresponding path program 1 times [2023-08-30 00:54:19,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:54:19,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558675795] [2023-08-30 00:54:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:54:19,941 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 00:54:19,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:54:19,943 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) [2023-08-30 00:54:19,946 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 [2023-08-30 00:54:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:54:20,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:54:20,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:54:20,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:54:20,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:54:20,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:54:20,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:54:20,371 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 00:54:20,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2023-08-30 00:54:20,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-30 00:54:20,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:54:20,482 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 [2023-08-30 00:54:20,681 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 00:54:20,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:54:20,681 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:54:20,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558675795] [2023-08-30 00:54:20,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558675795] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:54:20,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:54:20,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:54:20,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824952340] [2023-08-30 00:54:20,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:54:20,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:54:20,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:54:20,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:54:20,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:54:21,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 510 [2023-08-30 00:54:21,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 654 flow. Second operand has 4 states, 4 states have (on average 213.75) internal successors, (855), 4 states have internal predecessors, (855), 0 states have call successors, (0), 0 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 00:54:21,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:54:21,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 510 [2023-08-30 00:54:21,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand