./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.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 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:39:06,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:39:06,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:39:06,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:39:06,137 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:39:06,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:39:06,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:39:06,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:39:06,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:39:06,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:39:06,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:39:06,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:39:06,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:39:06,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:39:06,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:39:06,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:39:06,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:39:06,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:39:06,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:39:06,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:39:06,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:39:06,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:39:06,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:39:06,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:39:06,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:39:06,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:39:06,186 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:39:06,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:39:06,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:39:06,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:39:06,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:39:06,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:39:06,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:39:06,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:39:06,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:39:06,195 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:39:06,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:39:06,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:39:06,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:39:06,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:39:06,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:39:06,199 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:39:06,234 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:39:06,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:39:06,236 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:39:06,236 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:39:06,237 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:39:06,237 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:39:06,238 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:39:06,238 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:39:06,238 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:39:06,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:39:06,239 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:39:06,240 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:39:06,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:39:06,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:39:06,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:39:06,240 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:39:06,241 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:39:06,241 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:39:06,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:39:06,241 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:39:06,241 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:39:06,242 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:39:06,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:39:06,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:39:06,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:39:06,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:39:06,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:39:06,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:39:06,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:39:06,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:39:06,243 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:39:06,244 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:39:06,244 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:39:06,244 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:39:06,244 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:39:06,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:39:06,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:39:06,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:39:06,580 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:39:06,581 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:39:06,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.c [2023-09-01 02:39:07,776 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:39:07,967 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:39:07,967 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.c [2023-09-01 02:39:07,974 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/479a53ed8/d4604291e4354c21a9231b6fe5c501fd/FLAGd9782b3ae [2023-09-01 02:39:07,988 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/479a53ed8/d4604291e4354c21a9231b6fe5c501fd [2023-09-01 02:39:07,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:39:07,991 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:39:07,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:39:07,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:39:07,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:39:07,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:39:07" (1/1) ... [2023-09-01 02:39:07,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52fce35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:39:07, skipping insertion in model container [2023-09-01 02:39:07,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:39:07" (1/1) ... [2023-09-01 02:39:08,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:39:08,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:39:08,220 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2023-09-01 02:39:08,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:39:08,251 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 02:39:08,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7eb1770d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:39:08, skipping insertion in model container [2023-09-01 02:39:08,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:39:08,255 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 02:39:08,257 INFO L158 Benchmark]: Toolchain (without parser) took 264.09ms. Allocated memory is still 86.0MB. Free memory was 46.3MB in the beginning and 57.7MB in the end (delta: -11.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-09-01 02:39:08,257 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 60.8MB. Free memory was 38.8MB in the beginning and 38.7MB in the end (delta: 81.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 02:39:08,258 INFO L158 Benchmark]: CACSL2BoogieTranslator took 261.44ms. Allocated memory is still 86.0MB. Free memory was 46.0MB in the beginning and 57.7MB in the end (delta: -11.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-09-01 02:39:08,259 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 60.8MB. Free memory was 38.8MB in the beginning and 38.7MB in the end (delta: 81.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 261.44ms. Allocated memory is still 86.0MB. Free memory was 46.0MB in the beginning and 57.7MB in the end (delta: -11.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 171]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.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 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:39:09,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:39:09,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:39:09,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:39:09,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:39:09,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:39:09,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:39:09,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:39:09,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:39:10,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:39:10,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:39:10,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:39:10,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:39:10,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:39:10,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:39:10,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:39:10,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:39:10,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:39:10,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:39:10,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:39:10,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:39:10,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:39:10,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:39:10,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:39:10,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:39:10,038 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:39:10,039 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:39:10,040 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:39:10,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:39:10,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:39:10,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:39:10,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:39:10,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:39:10,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:39:10,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:39:10,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:39:10,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:39:10,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:39:10,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:39:10,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:39:10,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:39:10,054 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 02:39:10,096 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:39:10,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:39:10,097 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:39:10,097 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:39:10,098 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:39:10,098 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:39:10,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:39:10,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:39:10,099 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:39:10,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:39:10,100 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:39:10,100 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:39:10,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:39:10,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:39:10,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:39:10,101 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:39:10,101 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:39:10,101 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:39:10,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:39:10,102 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:39:10,102 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 02:39:10,102 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 02:39:10,102 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:39:10,102 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:39:10,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:39:10,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:39:10,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:39:10,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:39:10,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:39:10,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:39:10,104 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 02:39:10,104 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 02:39:10,104 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:39:10,104 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:39:10,104 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:39:10,105 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 02:39:10,105 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:39:10,105 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:39:10,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:39:10,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:39:10,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:39:10,429 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:39:10,429 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:39:10,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.c [2023-09-01 02:39:11,610 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:39:11,790 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:39:11,790 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.c [2023-09-01 02:39:11,796 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/511ea1ab4/b623dc98a2f64a7191872bd89edf3e67/FLAG58cb2e2bc [2023-09-01 02:39:11,810 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/511ea1ab4/b623dc98a2f64a7191872bd89edf3e67 [2023-09-01 02:39:11,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:39:11,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:39:11,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:39:11,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:39:11,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:39:11,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:39:11" (1/1) ... [2023-09-01 02:39:11,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bd967f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:39:11, skipping insertion in model container [2023-09-01 02:39:11,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:39:11" (1/1) ... [2023-09-01 02:39:11,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:39:11,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:39:12,006 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2023-09-01 02:39:12,016 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:39:12,031 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 02:39:12,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:39:12,051 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2023-09-01 02:39:12,054 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:39:12,059 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:39:12,083 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2023-09-01 02:39:12,085 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:39:12,104 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:39:12,105 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:39:12,110 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:39:12,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:39:12 WrapperNode [2023-09-01 02:39:12,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:39:12,111 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:39:12,111 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:39:12,112 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:39:12,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:39:12" (1/1) ... [2023-09-01 02:39:12,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:39:12" (1/1) ... [2023-09-01 02:39:12,160 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 339 [2023-09-01 02:39:12,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:39:12,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:39:12,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:39:12,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:39:12,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:39:12" (1/1) ... [2023-09-01 02:39:12,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:39:12" (1/1) ... [2023-09-01 02:39:12,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:39:12" (1/1) ... [2023-09-01 02:39:12,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:39:12" (1/1) ... [2023-09-01 02:39:12,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:39:12" (1/1) ... [2023-09-01 02:39:12,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:39:12" (1/1) ... [2023-09-01 02:39:12,209 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:39:12" (1/1) ... [2023-09-01 02:39:12,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:39:12" (1/1) ... [2023-09-01 02:39:12,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:39:12,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:39:12,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:39:12,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:39:12,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:39:12" (1/1) ... [2023-09-01 02:39:12,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:39:12,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:39:12,261 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 02:39:12,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 02:39:12,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:39:12,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 02:39:12,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:39:12,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 02:39:12,289 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:39:12,289 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:39:12,289 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:39:12,289 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:39:12,289 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 02:39:12,289 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 02:39:12,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:39:12,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:39:12,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 02:39:12,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:39:12,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:39:12,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:39:12,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 02:39:12,291 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 02:39:12,383 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:39:12,390 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:39:13,167 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:39:13,343 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:39:13,343 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 02:39:13,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:39:13 BoogieIcfgContainer [2023-09-01 02:39:13,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:39:13,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:39:13,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:39:13,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:39:13,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:39:11" (1/3) ... [2023-09-01 02:39:13,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b001248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:39:13, skipping insertion in model container [2023-09-01 02:39:13,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:39:12" (2/3) ... [2023-09-01 02:39:13,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b001248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:39:13, skipping insertion in model container [2023-09-01 02:39:13,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:39:13" (3/3) ... [2023-09-01 02:39:13,353 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2023-09-01 02:39:13,369 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:39:13,369 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2023-09-01 02:39:13,369 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:39:13,484 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 02:39:13,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 294 transitions, 612 flow [2023-09-01 02:39:13,671 INFO L130 PetriNetUnfolder]: 27/291 cut-off events. [2023-09-01 02:39:13,672 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 02:39:13,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 291 events. 27/291 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 340 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 238. Up to 6 conditions per place. [2023-09-01 02:39:13,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 277 places, 294 transitions, 612 flow [2023-09-01 02:39:13,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 287 transitions, 592 flow [2023-09-01 02:39:13,701 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:39:13,717 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 270 places, 287 transitions, 592 flow [2023-09-01 02:39:13,722 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 270 places, 287 transitions, 592 flow [2023-09-01 02:39:13,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 287 transitions, 592 flow [2023-09-01 02:39:13,799 INFO L130 PetriNetUnfolder]: 27/287 cut-off events. [2023-09-01 02:39:13,800 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 02:39:13,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 287 events. 27/287 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 339 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 238. Up to 6 conditions per place. [2023-09-01 02:39:13,805 INFO L119 LiptonReduction]: Number of co-enabled transitions 5028 [2023-09-01 02:39:45,857 INFO L134 LiptonReduction]: Checked pairs total: 6435 [2023-09-01 02:39:45,857 INFO L136 LiptonReduction]: Total number of compositions: 339 [2023-09-01 02:39:45,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:39:45,889 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;@74a79a29, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:39:45,891 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2023-09-01 02:39:45,894 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 02:39:45,894 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:39:45,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:45,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:39:45,895 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:39:45,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:45,905 INFO L85 PathProgramCache]: Analyzing trace with hash 46090, now seen corresponding path program 1 times [2023-09-01 02:39:45,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:45,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086387166] [2023-09-01 02:39:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:45,952 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:39:45,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:45,957 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:39:45,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 02:39:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:46,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:39:46,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:46,239 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:39:46,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 02:39:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:39:46,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:39:46,285 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:46,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086387166] [2023-09-01 02:39:46,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086387166] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:39:46,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:39:46,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:39:46,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955851670] [2023-09-01 02:39:46,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:39:46,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:39:46,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:46,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:39:46,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:39:46,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 633 [2023-09-01 02:39:46,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:46,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:39:46,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 633 [2023-09-01 02:39:46,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:47,885 INFO L130 PetriNetUnfolder]: 4796/6695 cut-off events. [2023-09-01 02:39:47,886 INFO L131 PetriNetUnfolder]: For 153/153 co-relation queries the response was YES. [2023-09-01 02:39:47,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13580 conditions, 6695 events. 4796/6695 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 33715 event pairs, 4049 based on Foata normal form. 0/1335 useless extension candidates. Maximal degree in co-relation 12540. Up to 6695 conditions per place. [2023-09-01 02:39:47,932 INFO L137 encePairwiseOnDemand]: 628/633 looper letters, 55 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-09-01 02:39:47,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 242 flow [2023-09-01 02:39:47,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:39:47,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:39:47,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 765 transitions. [2023-09-01 02:39:47,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028436018957346 [2023-09-01 02:39:47,951 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 765 transitions. [2023-09-01 02:39:47,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 765 transitions. [2023-09-01 02:39:47,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:47,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 765 transitions. [2023-09-01 02:39:47,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:47,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:47,967 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:47,969 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 138 flow. Second operand 3 states and 765 transitions. [2023-09-01 02:39:47,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 242 flow [2023-09-01 02:39:47,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 56 transitions, 230 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 02:39:47,984 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 120 flow [2023-09-01 02:39:47,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2023-09-01 02:39:47,990 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -8 predicate places. [2023-09-01 02:39:47,992 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 120 flow [2023-09-01 02:39:47,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:47,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:47,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:39:48,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 02:39:48,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:39:48,205 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:39:48,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:48,213 INFO L85 PathProgramCache]: Analyzing trace with hash 46089, now seen corresponding path program 1 times [2023-09-01 02:39:48,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:48,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509825432] [2023-09-01 02:39:48,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:48,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:39:48,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:48,218 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:39:48,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 02:39:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:48,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:39:48,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:48,422 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:39:48,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:39:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:39:48,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:39:48,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:48,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509825432] [2023-09-01 02:39:48,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509825432] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:39:48,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:39:48,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:39:48,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118520151] [2023-09-01 02:39:48,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:39:48,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:39:48,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:48,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:39:48,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:39:48,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 633 [2023-09-01 02:39:48,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:48,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:39:48,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 633 [2023-09-01 02:39:48,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:50,889 INFO L130 PetriNetUnfolder]: 9591/13386 cut-off events. [2023-09-01 02:39:50,889 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-09-01 02:39:50,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26918 conditions, 13386 events. 9591/13386 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 1279. Compared 73589 event pairs, 8098 based on Foata normal form. 0/2669 useless extension candidates. Maximal degree in co-relation 26912. Up to 6696 conditions per place. [2023-09-01 02:39:50,989 INFO L137 encePairwiseOnDemand]: 624/633 looper letters, 102 selfloop transitions, 6 changer transitions 0/108 dead transitions. [2023-09-01 02:39:50,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 108 transitions, 446 flow [2023-09-01 02:39:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:39:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:39:50,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 816 transitions. [2023-09-01 02:39:50,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4296998420221169 [2023-09-01 02:39:50,994 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 816 transitions. [2023-09-01 02:39:50,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 816 transitions. [2023-09-01 02:39:50,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:50,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 816 transitions. [2023-09-01 02:39:50,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:51,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:51,002 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:51,002 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 120 flow. Second operand 3 states and 816 transitions. [2023-09-01 02:39:51,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 108 transitions, 446 flow [2023-09-01 02:39:51,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 108 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:39:51,006 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 169 flow [2023-09-01 02:39:51,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2023-09-01 02:39:51,007 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -5 predicate places. [2023-09-01 02:39:51,008 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 169 flow [2023-09-01 02:39:51,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:51,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:51,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:39:51,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 02:39:51,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:39:51,222 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:39:51,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:51,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1434982, now seen corresponding path program 1 times [2023-09-01 02:39:51,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:51,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052889123] [2023-09-01 02:39:51,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:51,224 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:39:51,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:51,225 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:39:51,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 02:39:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:51,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:39:51,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:51,426 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:39:51,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:39:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:39:51,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:39:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:39:51,695 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:51,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052889123] [2023-09-01 02:39:51,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052889123] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:39:51,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:39:51,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 02:39:51,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526726909] [2023-09-01 02:39:51,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:39:51,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:39:51,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:51,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:39:51,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:39:52,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 633 [2023-09-01 02:39:52,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 169 flow. Second operand has 6 states, 6 states have (on average 221.0) internal successors, (1326), 6 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:52,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:39:52,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 633 [2023-09-01 02:39:52,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:56,487 INFO L130 PetriNetUnfolder]: 14396/20093 cut-off events. [2023-09-01 02:39:56,487 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2023-09-01 02:39:56,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40445 conditions, 20093 events. 14396/20093 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 1547. Compared 116249 event pairs, 12147 based on Foata normal form. 0/4024 useless extension candidates. Maximal degree in co-relation 40436. Up to 6697 conditions per place. [2023-09-01 02:39:56,623 INFO L137 encePairwiseOnDemand]: 621/633 looper letters, 149 selfloop transitions, 27 changer transitions 0/176 dead transitions. [2023-09-01 02:39:56,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 176 transitions, 805 flow [2023-09-01 02:39:56,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:39:56,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:39:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1505 transitions. [2023-09-01 02:39:56,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3962611901000527 [2023-09-01 02:39:56,630 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1505 transitions. [2023-09-01 02:39:56,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1505 transitions. [2023-09-01 02:39:56,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:56,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1505 transitions. [2023-09-01 02:39:56,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 250.83333333333334) internal successors, (1505), 6 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:56,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 633.0) internal successors, (4431), 7 states have internal predecessors, (4431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:56,643 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 633.0) internal successors, (4431), 7 states have internal predecessors, (4431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:56,644 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 169 flow. Second operand 6 states and 1505 transitions. [2023-09-01 02:39:56,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 176 transitions, 805 flow [2023-09-01 02:39:56,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 176 transitions, 781 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:39:56,648 INFO L231 Difference]: Finished difference. Result has 66 places, 82 transitions, 361 flow [2023-09-01 02:39:56,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=66, PETRI_TRANSITIONS=82} [2023-09-01 02:39:56,649 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 2 predicate places. [2023-09-01 02:39:56,649 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 82 transitions, 361 flow [2023-09-01 02:39:56,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.0) internal successors, (1326), 6 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:56,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:56,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 02:39:56,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 02:39:56,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:39:56,860 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:39:56,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:56,860 INFO L85 PathProgramCache]: Analyzing trace with hash 44509720, now seen corresponding path program 1 times [2023-09-01 02:39:56,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:56,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019259688] [2023-09-01 02:39:56,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:56,866 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:39:56,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:56,868 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:39:56,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 02:39:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:56,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 02:39:56,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:57,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:57,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:57,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:57,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:57,078 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 02:39:57,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 02:39:57,110 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 02:39:57,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 02:39:57,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:57,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:39:57,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:57,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:39:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:39:57,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:39:57,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:57,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019259688] [2023-09-01 02:39:57,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019259688] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:39:57,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:39:57,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:39:57,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954040389] [2023-09-01 02:39:57,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:39:57,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:39:57,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:57,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:39:57,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:39:57,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 633 [2023-09-01 02:39:57,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 82 transitions, 361 flow. Second operand has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:57,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:39:57,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 633 [2023-09-01 02:39:57,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:59,272 INFO L130 PetriNetUnfolder]: 11154/15768 cut-off events. [2023-09-01 02:39:59,272 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2023-09-01 02:39:59,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31857 conditions, 15768 events. 11154/15768 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 1447. Compared 91047 event pairs, 9375 based on Foata normal form. 0/3557 useless extension candidates. Maximal degree in co-relation 31844. Up to 15768 conditions per place. [2023-09-01 02:39:59,342 INFO L137 encePairwiseOnDemand]: 630/633 looper letters, 77 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2023-09-01 02:39:59,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 497 flow [2023-09-01 02:39:59,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:39:59,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:39:59,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 782 transitions. [2023-09-01 02:39:59,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41179568193786203 [2023-09-01 02:39:59,345 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 782 transitions. [2023-09-01 02:39:59,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 782 transitions. [2023-09-01 02:39:59,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:59,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 782 transitions. [2023-09-01 02:39:59,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:59,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:59,352 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:59,352 INFO L175 Difference]: Start difference. First operand has 66 places, 82 transitions, 361 flow. Second operand 3 states and 782 transitions. [2023-09-01 02:39:59,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 497 flow [2023-09-01 02:39:59,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 78 transitions, 467 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 02:39:59,355 INFO L231 Difference]: Finished difference. Result has 65 places, 78 transitions, 313 flow [2023-09-01 02:39:59,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=313, PETRI_PLACES=65, PETRI_TRANSITIONS=78} [2023-09-01 02:39:59,356 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 1 predicate places. [2023-09-01 02:39:59,357 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 78 transitions, 313 flow [2023-09-01 02:39:59,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:59,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:59,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 02:39:59,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 02:39:59,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:39:59,567 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:39:59,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:59,568 INFO L85 PathProgramCache]: Analyzing trace with hash 44509719, now seen corresponding path program 1 times [2023-09-01 02:39:59,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:59,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723179346] [2023-09-01 02:39:59,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:59,569 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:39:59,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:59,571 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:39:59,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 02:39:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:59,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 02:39:59,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:59,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:59,774 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-09-01 02:39:59,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-09-01 02:39:59,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:59,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:39:59,909 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:39:59,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:39:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:39:59,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:39:59,923 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:59,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723179346] [2023-09-01 02:39:59,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723179346] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:39:59,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:39:59,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:39:59,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696403080] [2023-09-01 02:39:59,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:39:59,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:39:59,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:59,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:39:59,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:40:00,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 633 [2023-09-01 02:40:00,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 78 transitions, 313 flow. Second operand has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:00,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:40:00,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 633 [2023-09-01 02:40:00,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:40:01,409 INFO L130 PetriNetUnfolder]: 7912/11443 cut-off events. [2023-09-01 02:40:01,410 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2023-09-01 02:40:01,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23181 conditions, 11443 events. 7912/11443 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 935. Compared 65229 event pairs, 6603 based on Foata normal form. 0/3089 useless extension candidates. Maximal degree in co-relation 23167. Up to 11443 conditions per place. [2023-09-01 02:40:01,468 INFO L137 encePairwiseOnDemand]: 630/633 looper letters, 73 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-09-01 02:40:01,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 74 transitions, 441 flow [2023-09-01 02:40:01,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:40:01,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:40:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 780 transitions. [2023-09-01 02:40:01,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107424960505529 [2023-09-01 02:40:01,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 780 transitions. [2023-09-01 02:40:01,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 780 transitions. [2023-09-01 02:40:01,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:40:01,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 780 transitions. [2023-09-01 02:40:01,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.0) internal successors, (780), 3 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:01,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:01,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:01,482 INFO L175 Difference]: Start difference. First operand has 65 places, 78 transitions, 313 flow. Second operand 3 states and 780 transitions. [2023-09-01 02:40:01,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 74 transitions, 441 flow [2023-09-01 02:40:01,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 74 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:40:01,488 INFO L231 Difference]: Finished difference. Result has 64 places, 74 transitions, 294 flow [2023-09-01 02:40:01,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=294, PETRI_PLACES=64, PETRI_TRANSITIONS=74} [2023-09-01 02:40:01,491 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 0 predicate places. [2023-09-01 02:40:01,491 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 74 transitions, 294 flow [2023-09-01 02:40:01,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:01,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:40:01,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:40:01,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 02:40:01,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:40:01,702 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:40:01,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:40:01,703 INFO L85 PathProgramCache]: Analyzing trace with hash -175799411, now seen corresponding path program 1 times [2023-09-01 02:40:01,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:40:01,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905102029] [2023-09-01 02:40:01,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:40:01,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:40:01,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:40:01,705 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:40:01,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 02:40:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:40:01,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2023-09-01 02:40:01,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:40:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:40:01,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:40:01,792 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:40:01,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905102029] [2023-09-01 02:40:01,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905102029] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:40:01,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:40:01,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:40:01,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273928503] [2023-09-01 02:40:01,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:40:01,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:40:01,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:40:01,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:40:01,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:40:01,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 633 [2023-09-01 02:40:01,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 74 transitions, 294 flow. Second operand has 3 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) [2023-09-01 02:40:01,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:40:01,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 633 [2023-09-01 02:40:01,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:40:03,877 INFO L130 PetriNetUnfolder]: 10840/15481 cut-off events. [2023-09-01 02:40:03,877 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2023-09-01 02:40:03,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31300 conditions, 15481 events. 10840/15481 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 1021. Compared 94682 event pairs, 2931 based on Foata normal form. 0/4271 useless extension candidates. Maximal degree in co-relation 31285. Up to 9715 conditions per place. [2023-09-01 02:40:03,941 INFO L137 encePairwiseOnDemand]: 623/633 looper letters, 105 selfloop transitions, 4 changer transitions 0/109 dead transitions. [2023-09-01 02:40:03,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 109 transitions, 587 flow [2023-09-01 02:40:03,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:40:03,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:40:03,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 825 transitions. [2023-09-01 02:40:03,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344391785150079 [2023-09-01 02:40:03,943 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 825 transitions. [2023-09-01 02:40:03,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 825 transitions. [2023-09-01 02:40:03,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:40:03,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 825 transitions. [2023-09-01 02:40:03,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:03,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:03,949 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:03,949 INFO L175 Difference]: Start difference. First operand has 64 places, 74 transitions, 294 flow. Second operand 3 states and 825 transitions. [2023-09-01 02:40:03,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 109 transitions, 587 flow [2023-09-01 02:40:03,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 109 transitions, 586 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:40:03,952 INFO L231 Difference]: Finished difference. Result has 67 places, 77 transitions, 333 flow [2023-09-01 02:40:03,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=333, PETRI_PLACES=67, PETRI_TRANSITIONS=77} [2023-09-01 02:40:03,953 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 3 predicate places. [2023-09-01 02:40:03,953 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 77 transitions, 333 flow [2023-09-01 02:40:03,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-09-01 02:40:03,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:40:03,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:40:03,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-09-01 02:40:04,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:40:04,165 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:40:04,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:40:04,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1154812185, now seen corresponding path program 1 times [2023-09-01 02:40:04,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:40:04,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932361958] [2023-09-01 02:40:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:40:04,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:40:04,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:40:04,168 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:40:04,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 02:40:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:40:04,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:40:04,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:40:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:40:04,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:40:04,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:40:04,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932361958] [2023-09-01 02:40:04,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932361958] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:40:04,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:40:04,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:40:04,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812090784] [2023-09-01 02:40:04,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:40:04,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:40:04,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:40:04,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:40:04,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:40:04,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 633 [2023-09-01 02:40:04,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 77 transitions, 333 flow. Second operand has 3 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:04,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:40:04,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 633 [2023-09-01 02:40:04,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:40:06,331 INFO L130 PetriNetUnfolder]: 12700/18307 cut-off events. [2023-09-01 02:40:06,331 INFO L131 PetriNetUnfolder]: For 3486/3486 co-relation queries the response was YES. [2023-09-01 02:40:06,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41281 conditions, 18307 events. 12700/18307 cut-off events. For 3486/3486 co-relation queries the response was YES. Maximal size of possible extension queue 1209. Compared 112172 event pairs, 4167 based on Foata normal form. 600/7109 useless extension candidates. Maximal degree in co-relation 41263. Up to 15457 conditions per place. [2023-09-01 02:40:06,392 INFO L137 encePairwiseOnDemand]: 627/633 looper letters, 102 selfloop transitions, 3 changer transitions 0/105 dead transitions. [2023-09-01 02:40:06,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 105 transitions, 603 flow [2023-09-01 02:40:06,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:40:06,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:40:06,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 812 transitions. [2023-09-01 02:40:06,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42759347024749866 [2023-09-01 02:40:06,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 812 transitions. [2023-09-01 02:40:06,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 812 transitions. [2023-09-01 02:40:06,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:40:06,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 812 transitions. [2023-09-01 02:40:06,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:06,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:06,400 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:06,400 INFO L175 Difference]: Start difference. First operand has 67 places, 77 transitions, 333 flow. Second operand 3 states and 812 transitions. [2023-09-01 02:40:06,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 105 transitions, 603 flow [2023-09-01 02:40:06,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 105 transitions, 595 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:40:06,422 INFO L231 Difference]: Finished difference. Result has 68 places, 79 transitions, 348 flow [2023-09-01 02:40:06,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=348, PETRI_PLACES=68, PETRI_TRANSITIONS=79} [2023-09-01 02:40:06,423 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 4 predicate places. [2023-09-01 02:40:06,423 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 79 transitions, 348 flow [2023-09-01 02:40:06,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:06,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:40:06,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:40:06,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 02:40:06,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:40:06,634 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:40:06,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:40:06,635 INFO L85 PathProgramCache]: Analyzing trace with hash -175799452, now seen corresponding path program 1 times [2023-09-01 02:40:06,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:40:06,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262673448] [2023-09-01 02:40:06,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:40:06,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:40:06,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:40:06,636 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:40:06,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 02:40:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:40:06,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 02:40:06,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:40:06,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:40:06,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:40:06,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:40:06,824 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 02:40:06,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-09-01 02:40:06,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 02:40:06,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:40:06,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:40:06,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:40:06,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:40:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:40:06,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:40:06,945 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:40:06,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262673448] [2023-09-01 02:40:06,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262673448] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:40:06,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:40:06,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:40:06,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890646701] [2023-09-01 02:40:06,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:40:06,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:40:06,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:40:06,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:40:06,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:40:07,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 633 [2023-09-01 02:40:07,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 79 transitions, 348 flow. Second operand has 4 states, 4 states have (on average 243.5) internal successors, (974), 4 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:07,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:40:07,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 633 [2023-09-01 02:40:07,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:40:08,892 INFO L130 PetriNetUnfolder]: 12049/17326 cut-off events. [2023-09-01 02:40:08,892 INFO L131 PetriNetUnfolder]: For 2655/2655 co-relation queries the response was YES. [2023-09-01 02:40:08,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41144 conditions, 17326 events. 12049/17326 cut-off events. For 2655/2655 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 103937 event pairs, 9786 based on Foata normal form. 0/7358 useless extension candidates. Maximal degree in co-relation 41125. Up to 17326 conditions per place. [2023-09-01 02:40:08,957 INFO L137 encePairwiseOnDemand]: 630/633 looper letters, 76 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2023-09-01 02:40:08,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 77 transitions, 498 flow [2023-09-01 02:40:08,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:40:08,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:40:08,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 778 transitions. [2023-09-01 02:40:08,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40968931016324384 [2023-09-01 02:40:08,960 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 778 transitions. [2023-09-01 02:40:08,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 778 transitions. [2023-09-01 02:40:08,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:40:08,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 778 transitions. [2023-09-01 02:40:08,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.3333333333333) internal successors, (778), 3 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:08,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:08,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:08,965 INFO L175 Difference]: Start difference. First operand has 68 places, 79 transitions, 348 flow. Second operand 3 states and 778 transitions. [2023-09-01 02:40:08,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 77 transitions, 498 flow [2023-09-01 02:40:08,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 77 transitions, 495 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:40:08,969 INFO L231 Difference]: Finished difference. Result has 67 places, 77 transitions, 343 flow [2023-09-01 02:40:08,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=343, PETRI_PLACES=67, PETRI_TRANSITIONS=77} [2023-09-01 02:40:08,970 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 3 predicate places. [2023-09-01 02:40:08,970 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 77 transitions, 343 flow [2023-09-01 02:40:08,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 243.5) internal successors, (974), 4 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:08,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:40:08,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:40:08,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 02:40:09,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:40:09,177 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:40:09,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:40:09,177 INFO L85 PathProgramCache]: Analyzing trace with hash -175799453, now seen corresponding path program 1 times [2023-09-01 02:40:09,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:40:09,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573499118] [2023-09-01 02:40:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:40:09,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:40:09,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:40:09,179 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:40:09,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 02:40:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:40:09,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 02:40:09,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:40:09,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:40:09,321 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-09-01 02:40:09,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-09-01 02:40:09,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:40:09,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:40:09,431 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:40:09,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:40:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:40:09,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:40:09,457 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:40:09,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573499118] [2023-09-01 02:40:09,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573499118] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:40:09,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:40:09,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:40:09,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632635105] [2023-09-01 02:40:09,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:40:09,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:40:09,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:40:09,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:40:09,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:40:09,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 633 [2023-09-01 02:40:09,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 77 transitions, 343 flow. Second operand has 4 states, 4 states have (on average 243.5) internal successors, (974), 4 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:09,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:40:09,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 633 [2023-09-01 02:40:09,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:40:11,314 INFO L130 PetriNetUnfolder]: 11398/16345 cut-off events. [2023-09-01 02:40:11,314 INFO L131 PetriNetUnfolder]: For 2547/2547 co-relation queries the response was YES. [2023-09-01 02:40:11,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38787 conditions, 16345 events. 11398/16345 cut-off events. For 2547/2547 co-relation queries the response was YES. Maximal size of possible extension queue 1099. Compared 96840 event pairs, 9225 based on Foata normal form. 0/7139 useless extension candidates. Maximal degree in co-relation 38767. Up to 16345 conditions per place. [2023-09-01 02:40:11,384 INFO L137 encePairwiseOnDemand]: 630/633 looper letters, 74 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2023-09-01 02:40:11,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 75 transitions, 489 flow [2023-09-01 02:40:11,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:40:11,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:40:11,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 776 transitions. [2023-09-01 02:40:11,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4086361242759347 [2023-09-01 02:40:11,387 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 776 transitions. [2023-09-01 02:40:11,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 776 transitions. [2023-09-01 02:40:11,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:40:11,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 776 transitions. [2023-09-01 02:40:11,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:11,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:11,392 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:11,392 INFO L175 Difference]: Start difference. First operand has 67 places, 77 transitions, 343 flow. Second operand 3 states and 776 transitions. [2023-09-01 02:40:11,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 75 transitions, 489 flow [2023-09-01 02:40:11,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 75 transitions, 488 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:40:11,394 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 340 flow [2023-09-01 02:40:11,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=340, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2023-09-01 02:40:11,395 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 2 predicate places. [2023-09-01 02:40:11,395 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 340 flow [2023-09-01 02:40:11,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 243.5) internal successors, (974), 4 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:11,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:40:11,396 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 02:40:11,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 02:40:11,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:40:11,605 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:40:11,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:40:11,606 INFO L85 PathProgramCache]: Analyzing trace with hash -193944759, now seen corresponding path program 2 times [2023-09-01 02:40:11,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:40:11,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748573309] [2023-09-01 02:40:11,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:40:11,606 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:40:11,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:40:11,607 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:40:11,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 02:40:11,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:40:11,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:40:11,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 02:40:11,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:40:11,781 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:40:11,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:40:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:40:11,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:40:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:40:12,389 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:40:12,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748573309] [2023-09-01 02:40:12,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748573309] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:40:12,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:40:12,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:40:12,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233625363] [2023-09-01 02:40:12,389 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:40:12,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:40:12,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:40:12,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:40:12,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:40:16,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 633 [2023-09-01 02:40:16,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 340 flow. Second operand has 12 states, 12 states have (on average 224.0) internal successors, (2688), 12 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:16,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:40:16,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 633 [2023-09-01 02:40:16,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:40:18,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:20,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:21,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:23,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:25,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:26,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:28,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:30,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:32,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:33,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:35,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:38,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:47,722 INFO L130 PetriNetUnfolder]: 37974/54440 cut-off events. [2023-09-01 02:40:47,722 INFO L131 PetriNetUnfolder]: For 8516/8516 co-relation queries the response was YES. [2023-09-01 02:40:47,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129071 conditions, 54440 events. 37974/54440 cut-off events. For 8516/8516 co-relation queries the response was YES. Maximal size of possible extension queue 1797. Compared 353384 event pairs, 30750 based on Foata normal form. 18/23764 useless extension candidates. Maximal degree in co-relation 129050. Up to 7681 conditions per place. [2023-09-01 02:40:48,039 INFO L137 encePairwiseOnDemand]: 623/633 looper letters, 448 selfloop transitions, 52 changer transitions 0/500 dead transitions. [2023-09-01 02:40:48,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 500 transitions, 2738 flow [2023-09-01 02:40:48,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 02:40:48,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 02:40:48,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3144 transitions. [2023-09-01 02:40:48,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41390205371248023 [2023-09-01 02:40:48,046 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3144 transitions. [2023-09-01 02:40:48,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3144 transitions. [2023-09-01 02:40:48,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:40:48,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3144 transitions. [2023-09-01 02:40:48,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 262.0) internal successors, (3144), 12 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:48,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 633.0) internal successors, (8229), 13 states have internal predecessors, (8229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:48,063 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 633.0) internal successors, (8229), 13 states have internal predecessors, (8229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:48,064 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 340 flow. Second operand 12 states and 3144 transitions. [2023-09-01 02:40:48,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 500 transitions, 2738 flow [2023-09-01 02:40:48,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 500 transitions, 2737 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:40:48,072 INFO L231 Difference]: Finished difference. Result has 83 places, 106 transitions, 729 flow [2023-09-01 02:40:48,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=729, PETRI_PLACES=83, PETRI_TRANSITIONS=106} [2023-09-01 02:40:48,073 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 19 predicate places. [2023-09-01 02:40:48,073 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 106 transitions, 729 flow [2023-09-01 02:40:48,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 224.0) internal successors, (2688), 12 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:48,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:40:48,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:40:48,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 02:40:48,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:40:48,284 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:40:48,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:40:48,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1439513252, now seen corresponding path program 1 times [2023-09-01 02:40:48,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:40:48,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472756705] [2023-09-01 02:40:48,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:40:48,285 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:40:48,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:40:48,287 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:40:48,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 02:40:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:40:48,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:40:48,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:40:48,454 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 02:40:48,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-09-01 02:40:48,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:40:48,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:40:48,517 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:40:48,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:40:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:40:48,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:40:48,554 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:40:48,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472756705] [2023-09-01 02:40:48,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472756705] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:40:48,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:40:48,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:40:48,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101954560] [2023-09-01 02:40:48,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:40:48,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:40:48,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:40:48,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:40:48,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:40:48,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 633 [2023-09-01 02:40:48,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 106 transitions, 729 flow. Second operand has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:48,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:40:48,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 633 [2023-09-01 02:40:48,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:40:54,913 INFO L130 PetriNetUnfolder]: 36054/51500 cut-off events. [2023-09-01 02:40:54,913 INFO L131 PetriNetUnfolder]: For 8271/8271 co-relation queries the response was YES. [2023-09-01 02:40:55,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122240 conditions, 51500 events. 36054/51500 cut-off events. For 8271/8271 co-relation queries the response was YES. Maximal size of possible extension queue 1695. Compared 333443 event pairs, 29160 based on Foata normal form. 0/23118 useless extension candidates. Maximal degree in co-relation 122211. Up to 51500 conditions per place. [2023-09-01 02:40:55,186 INFO L137 encePairwiseOnDemand]: 630/633 looper letters, 103 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2023-09-01 02:40:55,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 104 transitions, 933 flow [2023-09-01 02:40:55,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:40:55,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:40:55,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 762 transitions. [2023-09-01 02:40:55,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40126382306477093 [2023-09-01 02:40:55,188 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 762 transitions. [2023-09-01 02:40:55,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 762 transitions. [2023-09-01 02:40:55,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:40:55,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 762 transitions. [2023-09-01 02:40:55,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:55,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:55,191 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:55,191 INFO L175 Difference]: Start difference. First operand has 83 places, 106 transitions, 729 flow. Second operand 3 states and 762 transitions. [2023-09-01 02:40:55,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 104 transitions, 933 flow [2023-09-01 02:40:55,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 104 transitions, 840 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-09-01 02:40:55,196 INFO L231 Difference]: Finished difference. Result has 79 places, 104 transitions, 634 flow [2023-09-01 02:40:55,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=634, PETRI_PLACES=79, PETRI_TRANSITIONS=104} [2023-09-01 02:40:55,196 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 15 predicate places. [2023-09-01 02:40:55,196 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 104 transitions, 634 flow [2023-09-01 02:40:55,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:55,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:40:55,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:40:55,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 02:40:55,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:40:55,397 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:40:55,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:40:55,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1439513253, now seen corresponding path program 1 times [2023-09-01 02:40:55,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:40:55,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277926445] [2023-09-01 02:40:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:40:55,398 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:40:55,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:40:55,401 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:40:55,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 02:40:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:40:55,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 02:40:55,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:40:55,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:40:55,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:40:55,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:40:55,579 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 02:40:55,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-09-01 02:40:55,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-09-01 02:40:55,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:40:55,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:40:55,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:40:55,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:40:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:40:55,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:40:55,723 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:40:55,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277926445] [2023-09-01 02:40:55,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277926445] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:40:55,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:40:55,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:40:55,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146615728] [2023-09-01 02:40:55,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:40:55,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:40:55,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:40:55,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:40:55,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:40:56,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 633 [2023-09-01 02:40:56,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 104 transitions, 634 flow. Second operand has 5 states, 5 states have (on average 241.6) internal successors, (1208), 5 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:56,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:40:56,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 633 [2023-09-01 02:40:56,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:41:01,987 INFO L130 PetriNetUnfolder]: 34134/48560 cut-off events. [2023-09-01 02:41:01,988 INFO L131 PetriNetUnfolder]: For 8010/8010 co-relation queries the response was YES. [2023-09-01 02:41:02,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115233 conditions, 48560 events. 34134/48560 cut-off events. For 8010/8010 co-relation queries the response was YES. Maximal size of possible extension queue 1602. Compared 309148 event pairs, 27570 based on Foata normal form. 0/22480 useless extension candidates. Maximal degree in co-relation 115203. Up to 48560 conditions per place. [2023-09-01 02:41:02,315 INFO L137 encePairwiseOnDemand]: 630/633 looper letters, 101 selfloop transitions, 1 changer transitions 0/102 dead transitions. [2023-09-01 02:41:02,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 102 transitions, 834 flow [2023-09-01 02:41:02,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:41:02,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:41:02,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 766 transitions. [2023-09-01 02:41:02,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40337019483938913 [2023-09-01 02:41:02,317 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 766 transitions. [2023-09-01 02:41:02,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 766 transitions. [2023-09-01 02:41:02,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:41:02,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 766 transitions. [2023-09-01 02:41:02,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:02,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:02,321 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:02,322 INFO L175 Difference]: Start difference. First operand has 79 places, 104 transitions, 634 flow. Second operand 3 states and 766 transitions. [2023-09-01 02:41:02,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 102 transitions, 834 flow [2023-09-01 02:41:02,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 102 transitions, 833 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:41:02,327 INFO L231 Difference]: Finished difference. Result has 78 places, 102 transitions, 631 flow [2023-09-01 02:41:02,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=76, 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=631, PETRI_PLACES=78, PETRI_TRANSITIONS=102} [2023-09-01 02:41:02,329 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 14 predicate places. [2023-09-01 02:41:02,329 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 102 transitions, 631 flow [2023-09-01 02:41:02,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 241.6) internal successors, (1208), 5 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:02,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:41:02,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:41:02,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-09-01 02:41:02,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:41:02,540 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:41:02,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:41:02,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1439513238, now seen corresponding path program 1 times [2023-09-01 02:41:02,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:41:02,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931058535] [2023-09-01 02:41:02,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:41:02,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:41:02,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:41:02,542 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:41:02,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 02:41:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:41:02,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:41:02,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:41:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:41:02,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:41:02,634 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:41:02,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931058535] [2023-09-01 02:41:02,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931058535] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:41:02,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:41:02,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:41:02,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350291669] [2023-09-01 02:41:02,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:41:02,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:41:02,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:41:02,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:41:02,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:41:02,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 633 [2023-09-01 02:41:02,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 102 transitions, 631 flow. Second operand has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:02,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:41:02,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 633 [2023-09-01 02:41:02,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:41:08,392 INFO L130 PetriNetUnfolder]: 31774/45720 cut-off events. [2023-09-01 02:41:08,393 INFO L131 PetriNetUnfolder]: For 6480/6480 co-relation queries the response was YES. [2023-09-01 02:41:08,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108074 conditions, 45720 events. 31774/45720 cut-off events. For 6480/6480 co-relation queries the response was YES. Maximal size of possible extension queue 1664. Compared 296334 event pairs, 10630 based on Foata normal form. 0/21560 useless extension candidates. Maximal degree in co-relation 108043. Up to 31781 conditions per place. [2023-09-01 02:41:08,723 INFO L137 encePairwiseOnDemand]: 629/633 looper letters, 120 selfloop transitions, 2 changer transitions 0/122 dead transitions. [2023-09-01 02:41:08,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 122 transitions, 923 flow [2023-09-01 02:41:08,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:41:08,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:41:08,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 807 transitions. [2023-09-01 02:41:08,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42496050552922593 [2023-09-01 02:41:08,725 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 807 transitions. [2023-09-01 02:41:08,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 807 transitions. [2023-09-01 02:41:08,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:41:08,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 807 transitions. [2023-09-01 02:41:08,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:08,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:08,729 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:08,729 INFO L175 Difference]: Start difference. First operand has 78 places, 102 transitions, 631 flow. Second operand 3 states and 807 transitions. [2023-09-01 02:41:08,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 122 transitions, 923 flow [2023-09-01 02:41:08,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 122 transitions, 922 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:41:08,736 INFO L231 Difference]: Finished difference. Result has 80 places, 102 transitions, 640 flow [2023-09-01 02:41:08,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=640, PETRI_PLACES=80, PETRI_TRANSITIONS=102} [2023-09-01 02:41:08,738 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 16 predicate places. [2023-09-01 02:41:08,738 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 102 transitions, 640 flow [2023-09-01 02:41:08,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:08,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:41:08,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:41:08,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 02:41:08,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:41:08,951 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:41:08,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:41:08,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1439513202, now seen corresponding path program 1 times [2023-09-01 02:41:08,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:41:08,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376121113] [2023-09-01 02:41:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:41:08,951 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:41:08,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:41:08,953 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:41:08,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 02:41:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:41:09,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2023-09-01 02:41:09,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:41:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:41:09,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:41:09,057 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:41:09,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376121113] [2023-09-01 02:41:09,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376121113] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:41:09,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:41:09,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:41:09,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918024514] [2023-09-01 02:41:09,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:41:09,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:41:09,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:41:09,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:41:09,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:41:09,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 633 [2023-09-01 02:41:09,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 102 transitions, 640 flow. Second operand has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:09,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:41:09,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 633 [2023-09-01 02:41:09,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:41:16,979 INFO L130 PetriNetUnfolder]: 42454/59720 cut-off events. [2023-09-01 02:41:16,979 INFO L131 PetriNetUnfolder]: For 15560/15560 co-relation queries the response was YES. [2023-09-01 02:41:17,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149396 conditions, 59720 events. 42454/59720 cut-off events. For 15560/15560 co-relation queries the response was YES. Maximal size of possible extension queue 2095. Compared 396838 event pairs, 17270 based on Foata normal form. 0/32720 useless extension candidates. Maximal degree in co-relation 149363. Up to 32601 conditions per place. [2023-09-01 02:41:17,425 INFO L137 encePairwiseOnDemand]: 627/633 looper letters, 129 selfloop transitions, 5 changer transitions 0/134 dead transitions. [2023-09-01 02:41:17,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 134 transitions, 1017 flow [2023-09-01 02:41:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:41:17,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:41:17,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 813 transitions. [2023-09-01 02:41:17,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42812006319115326 [2023-09-01 02:41:17,428 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 813 transitions. [2023-09-01 02:41:17,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 813 transitions. [2023-09-01 02:41:17,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:41:17,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 813 transitions. [2023-09-01 02:41:17,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:17,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:17,430 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:17,430 INFO L175 Difference]: Start difference. First operand has 80 places, 102 transitions, 640 flow. Second operand 3 states and 813 transitions. [2023-09-01 02:41:17,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 134 transitions, 1017 flow [2023-09-01 02:41:17,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 134 transitions, 1014 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:41:17,440 INFO L231 Difference]: Finished difference. Result has 83 places, 105 transitions, 680 flow [2023-09-01 02:41:17,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=680, PETRI_PLACES=83, PETRI_TRANSITIONS=105} [2023-09-01 02:41:17,441 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 19 predicate places. [2023-09-01 02:41:17,441 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 105 transitions, 680 flow [2023-09-01 02:41:17,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:17,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:41:17,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:41:17,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 02:41:17,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:41:17,651 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:41:17,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:41:17,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1675234135, now seen corresponding path program 1 times [2023-09-01 02:41:17,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:41:17,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388123478] [2023-09-01 02:41:17,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:41:17,652 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:41:17,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:41:17,653 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:41:17,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 02:41:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:41:17,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:41:17,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:41:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:41:17,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:41:17,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:41:17,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388123478] [2023-09-01 02:41:17,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388123478] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:41:17,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:41:17,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:41:17,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242983172] [2023-09-01 02:41:17,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:41:17,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:41:17,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:41:17,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:41:17,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:41:17,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 633 [2023-09-01 02:41:17,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 105 transitions, 680 flow. Second operand has 4 states, 4 states have (on average 244.25) internal successors, (977), 4 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:17,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:41:17,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 633 [2023-09-01 02:41:17,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:41:23,485 INFO L130 PetriNetUnfolder]: 32534/45740 cut-off events. [2023-09-01 02:41:23,486 INFO L131 PetriNetUnfolder]: For 21340/21340 co-relation queries the response was YES. [2023-09-01 02:41:23,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126699 conditions, 45740 events. 32534/45740 cut-off events. For 21340/21340 co-relation queries the response was YES. Maximal size of possible extension queue 1602. Compared 281696 event pairs, 5650 based on Foata normal form. 1000/26220 useless extension candidates. Maximal degree in co-relation 126663. Up to 20060 conditions per place. [2023-09-01 02:41:23,848 INFO L137 encePairwiseOnDemand]: 628/633 looper letters, 138 selfloop transitions, 5 changer transitions 0/143 dead transitions. [2023-09-01 02:41:23,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 143 transitions, 1064 flow [2023-09-01 02:41:23,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:41:23,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:41:23,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1058 transitions. [2023-09-01 02:41:23,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178515007898894 [2023-09-01 02:41:23,851 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1058 transitions. [2023-09-01 02:41:23,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1058 transitions. [2023-09-01 02:41:23,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:41:23,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1058 transitions. [2023-09-01 02:41:23,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 264.5) internal successors, (1058), 4 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:23,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 633.0) internal successors, (3165), 5 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:23,855 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 633.0) internal successors, (3165), 5 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:23,855 INFO L175 Difference]: Start difference. First operand has 83 places, 105 transitions, 680 flow. Second operand 4 states and 1058 transitions. [2023-09-01 02:41:23,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 143 transitions, 1064 flow [2023-09-01 02:41:23,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 143 transitions, 1052 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 02:41:23,957 INFO L231 Difference]: Finished difference. Result has 84 places, 104 transitions, 670 flow [2023-09-01 02:41:23,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=670, PETRI_PLACES=84, PETRI_TRANSITIONS=104} [2023-09-01 02:41:23,958 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 20 predicate places. [2023-09-01 02:41:23,958 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 104 transitions, 670 flow [2023-09-01 02:41:23,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 244.25) internal successors, (977), 4 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:23,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:41:23,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:41:23,966 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 (16)] Ended with exit code 0 [2023-09-01 02:41:24,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:41:24,159 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:41:24,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:41:24,160 INFO L85 PathProgramCache]: Analyzing trace with hash -392730319, now seen corresponding path program 1 times [2023-09-01 02:41:24,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:41:24,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [701131823] [2023-09-01 02:41:24,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:41:24,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:41:24,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:41:24,161 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:41:24,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 02:41:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:41:24,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 02:41:24,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:41:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:41:24,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:41:24,315 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:41:24,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [701131823] [2023-09-01 02:41:24,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [701131823] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:41:24,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:41:24,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:41:24,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758029784] [2023-09-01 02:41:24,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:41:24,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:41:24,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:41:24,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:41:24,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:41:24,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 633 [2023-09-01 02:41:24,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 104 transitions, 670 flow. Second operand has 4 states, 4 states have (on average 238.5) internal successors, (954), 4 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:24,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:41:24,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 633 [2023-09-01 02:41:24,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:41:32,637 INFO L130 PetriNetUnfolder]: 43856/61936 cut-off events. [2023-09-01 02:41:32,638 INFO L131 PetriNetUnfolder]: For 34843/34843 co-relation queries the response was YES. [2023-09-01 02:41:32,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168369 conditions, 61936 events. 43856/61936 cut-off events. For 34843/34843 co-relation queries the response was YES. Maximal size of possible extension queue 2028. Compared 400169 event pairs, 33700 based on Foata normal form. 720/36776 useless extension candidates. Maximal degree in co-relation 168333. Up to 45739 conditions per place. [2023-09-01 02:41:33,065 INFO L137 encePairwiseOnDemand]: 622/633 looper letters, 171 selfloop transitions, 3 changer transitions 0/174 dead transitions. [2023-09-01 02:41:33,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 174 transitions, 1443 flow [2023-09-01 02:41:33,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:41:33,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:41:33,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1030 transitions. [2023-09-01 02:41:33,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4067930489731438 [2023-09-01 02:41:33,069 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1030 transitions. [2023-09-01 02:41:33,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1030 transitions. [2023-09-01 02:41:33,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:41:33,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1030 transitions. [2023-09-01 02:41:33,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 257.5) internal successors, (1030), 4 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:33,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 633.0) internal successors, (3165), 5 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:33,072 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 633.0) internal successors, (3165), 5 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:33,072 INFO L175 Difference]: Start difference. First operand has 84 places, 104 transitions, 670 flow. Second operand 4 states and 1030 transitions. [2023-09-01 02:41:33,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 174 transitions, 1443 flow [2023-09-01 02:41:33,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 174 transitions, 1433 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:41:33,091 INFO L231 Difference]: Finished difference. Result has 86 places, 104 transitions, 691 flow [2023-09-01 02:41:33,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=691, PETRI_PLACES=86, PETRI_TRANSITIONS=104} [2023-09-01 02:41:33,092 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 22 predicate places. [2023-09-01 02:41:33,092 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 104 transitions, 691 flow [2023-09-01 02:41:33,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 238.5) internal successors, (954), 4 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:33,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:41:33,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:41:33,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-09-01 02:41:33,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:41:33,301 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:41:33,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:41:33,301 INFO L85 PathProgramCache]: Analyzing trace with hash -392730310, now seen corresponding path program 1 times [2023-09-01 02:41:33,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:41:33,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629421542] [2023-09-01 02:41:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:41:33,302 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:41:33,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:41:33,303 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:41:33,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 02:41:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:41:33,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:41:33,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:41:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:41:33,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:41:33,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:41:33,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629421542] [2023-09-01 02:41:33,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629421542] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:41:33,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:41:33,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:41:33,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348240088] [2023-09-01 02:41:33,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:41:33,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:41:33,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:41:33,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:41:33,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:41:33,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 633 [2023-09-01 02:41:33,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 104 transitions, 691 flow. Second operand has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:33,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:41:33,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 633 [2023-09-01 02:41:33,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:41:41,065 INFO L130 PetriNetUnfolder]: 41776/58576 cut-off events. [2023-09-01 02:41:41,065 INFO L131 PetriNetUnfolder]: For 35523/35523 co-relation queries the response was YES. [2023-09-01 02:41:41,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169932 conditions, 58576 events. 41776/58576 cut-off events. For 35523/35523 co-relation queries the response was YES. Maximal size of possible extension queue 1955. Compared 368864 event pairs, 17220 based on Foata normal form. 0/37176 useless extension candidates. Maximal degree in co-relation 169895. Up to 52881 conditions per place. [2023-09-01 02:41:41,568 INFO L137 encePairwiseOnDemand]: 629/633 looper letters, 115 selfloop transitions, 2 changer transitions 0/117 dead transitions. [2023-09-01 02:41:41,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 117 transitions, 960 flow [2023-09-01 02:41:41,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:41:41,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:41:41,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 800 transitions. [2023-09-01 02:41:41,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421274354923644 [2023-09-01 02:41:41,570 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 800 transitions. [2023-09-01 02:41:41,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 800 transitions. [2023-09-01 02:41:41,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:41:41,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 800 transitions. [2023-09-01 02:41:41,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:41,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:41,573 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:41,573 INFO L175 Difference]: Start difference. First operand has 86 places, 104 transitions, 691 flow. Second operand 3 states and 800 transitions. [2023-09-01 02:41:41,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 117 transitions, 960 flow [2023-09-01 02:41:41,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 117 transitions, 954 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 02:41:41,597 INFO L231 Difference]: Finished difference. Result has 88 places, 104 transitions, 695 flow [2023-09-01 02:41:41,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=695, PETRI_PLACES=88, PETRI_TRANSITIONS=104} [2023-09-01 02:41:41,598 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 24 predicate places. [2023-09-01 02:41:41,598 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 104 transitions, 695 flow [2023-09-01 02:41:41,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:41,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:41:41,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:41:41,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-09-01 02:41:41,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:41:41,807 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:41:41,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:41:41,808 INFO L85 PathProgramCache]: Analyzing trace with hash -104338034, now seen corresponding path program 1 times [2023-09-01 02:41:41,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:41:41,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781754248] [2023-09-01 02:41:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:41:41,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:41:41,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:41:41,810 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:41:41,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 02:41:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:41:41,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 02:41:41,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:41:42,084 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:41:42,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:41:42,169 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:41:42,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 02:41:42,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:41:42,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 02:41:42,278 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 02:41:42,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 02:41:42,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:41:42,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 02:41:42,341 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:41:42,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 02:41:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:41:42,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:41:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:41:48,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:41:48,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781754248] [2023-09-01 02:41:48,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781754248] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:41:48,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:41:48,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 02:41:48,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092528247] [2023-09-01 02:41:48,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:41:48,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 02:41:48,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:41:48,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 02:41:48,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-09-01 02:41:52,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:41:55,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:41:58,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:42:00,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:42:03,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:42:06,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:42:07,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:42:11,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:42:14,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:42:18,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:42:22,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:42:26,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:42:27,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:42:30,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:42:33,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:42:35,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 633 [2023-09-01 02:42:35,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 104 transitions, 695 flow. Second operand has 10 states, 10 states have (on average 197.2) internal successors, (1972), 10 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:35,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:42:35,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 633 [2023-09-01 02:42:35,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:42:48,306 WARN L222 SmtUtils]: Spent 12.86s on a formula simplification. DAG size of input: 78 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:42:50,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:43:15,516 WARN L222 SmtUtils]: Spent 11.69s on a formula simplification. DAG size of input: 77 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:43:17,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:43:19,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:43:22,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:43:24,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:43:41,412 WARN L222 SmtUtils]: Spent 10.76s on a formula simplification. DAG size of input: 73 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:43:49,042 WARN L222 SmtUtils]: Spent 5.58s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:44:01,346 INFO L130 PetriNetUnfolder]: 62671/88111 cut-off events. [2023-09-01 02:44:01,346 INFO L131 PetriNetUnfolder]: For 63068/63068 co-relation queries the response was YES. [2023-09-01 02:44:01,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260344 conditions, 88111 events. 62671/88111 cut-off events. For 63068/63068 co-relation queries the response was YES. Maximal size of possible extension queue 2574. Compared 577706 event pairs, 46120 based on Foata normal form. 4560/66111 useless extension candidates. Maximal degree in co-relation 260305. Up to 43761 conditions per place. [2023-09-01 02:44:02,087 INFO L137 encePairwiseOnDemand]: 615/633 looper letters, 216 selfloop transitions, 54 changer transitions 0/270 dead transitions. [2023-09-01 02:44:02,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 270 transitions, 2287 flow [2023-09-01 02:44:02,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 02:44:02,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 02:44:02,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3261 transitions. [2023-09-01 02:44:02,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.321978672985782 [2023-09-01 02:44:02,094 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3261 transitions. [2023-09-01 02:44:02,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3261 transitions. [2023-09-01 02:44:02,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:44:02,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3261 transitions. [2023-09-01 02:44:02,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 203.8125) internal successors, (3261), 16 states have internal predecessors, (3261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:44:02,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 633.0) internal successors, (10761), 17 states have internal predecessors, (10761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:44:02,109 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 633.0) internal successors, (10761), 17 states have internal predecessors, (10761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:44:02,109 INFO L175 Difference]: Start difference. First operand has 88 places, 104 transitions, 695 flow. Second operand 16 states and 3261 transitions. [2023-09-01 02:44:02,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 270 transitions, 2287 flow [2023-09-01 02:44:02,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 270 transitions, 2279 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:44:02,153 INFO L231 Difference]: Finished difference. Result has 106 places, 143 transitions, 1290 flow [2023-09-01 02:44:02,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1290, PETRI_PLACES=106, PETRI_TRANSITIONS=143} [2023-09-01 02:44:02,154 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 42 predicate places. [2023-09-01 02:44:02,154 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 143 transitions, 1290 flow [2023-09-01 02:44:02,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 197.2) internal successors, (1972), 10 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:44:02,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:44:02,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:44:02,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 02:44:02,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:44:02,364 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:44:02,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:44:02,365 INFO L85 PathProgramCache]: Analyzing trace with hash 543347885, now seen corresponding path program 1 times [2023-09-01 02:44:02,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:44:02,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468016653] [2023-09-01 02:44:02,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:44:02,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:44:02,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:44:02,366 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:44:02,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 02:44:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:44:02,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:44:02,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:44:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:44:02,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:44:02,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:44:02,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468016653] [2023-09-01 02:44:02,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468016653] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:44:02,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:44:02,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:44:02,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109501546] [2023-09-01 02:44:02,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:44:02,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:44:02,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:44:02,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:44:02,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:44:02,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 633 [2023-09-01 02:44:02,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 143 transitions, 1290 flow. Second operand has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:44:02,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:44:02,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 633 [2023-09-01 02:44:02,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:44:13,684 INFO L130 PetriNetUnfolder]: 52611/74191 cut-off events. [2023-09-01 02:44:13,684 INFO L131 PetriNetUnfolder]: For 58541/58541 co-relation queries the response was YES. [2023-09-01 02:44:14,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242109 conditions, 74191 events. 52611/74191 cut-off events. For 58541/58541 co-relation queries the response was YES. Maximal size of possible extension queue 2467. Compared 482768 event pairs, 39240 based on Foata normal form. 140/51691 useless extension candidates. Maximal degree in co-relation 242065. Up to 73354 conditions per place. [2023-09-01 02:44:14,364 INFO L137 encePairwiseOnDemand]: 629/633 looper letters, 192 selfloop transitions, 3 changer transitions 0/195 dead transitions. [2023-09-01 02:44:14,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 195 transitions, 2073 flow [2023-09-01 02:44:14,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:44:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:44:14,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1004 transitions. [2023-09-01 02:44:14,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39652448657187994 [2023-09-01 02:44:14,367 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1004 transitions. [2023-09-01 02:44:14,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1004 transitions. [2023-09-01 02:44:14,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:44:14,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1004 transitions. [2023-09-01 02:44:14,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:44:14,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 633.0) internal successors, (3165), 5 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:44:14,371 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 633.0) internal successors, (3165), 5 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:44:14,371 INFO L175 Difference]: Start difference. First operand has 106 places, 143 transitions, 1290 flow. Second operand 4 states and 1004 transitions. [2023-09-01 02:44:14,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 195 transitions, 2073 flow [2023-09-01 02:44:14,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 195 transitions, 2058 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 02:44:14,468 INFO L231 Difference]: Finished difference. Result has 109 places, 143 transitions, 1284 flow [2023-09-01 02:44:14,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1284, PETRI_PLACES=109, PETRI_TRANSITIONS=143} [2023-09-01 02:44:14,469 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 45 predicate places. [2023-09-01 02:44:14,469 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 143 transitions, 1284 flow [2023-09-01 02:44:14,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:44:14,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:44:14,469 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 02:44:14,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-09-01 02:44:14,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:44:14,681 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:44:14,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:44:14,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1793556009, now seen corresponding path program 3 times [2023-09-01 02:44:14,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:44:14,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755110482] [2023-09-01 02:44:14,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:44:14,682 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:44:14,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:44:14,683 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:44:14,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 02:44:15,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 02:44:15,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:44:15,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:44:15,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:44:15,240 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:44:15,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:44:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:44:15,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:44:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:44:18,516 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:44:18,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755110482] [2023-09-01 02:44:18,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755110482] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:44:18,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:44:18,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 02:44:18,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108975257] [2023-09-01 02:44:18,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:44:18,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 02:44:18,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:44:18,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 02:44:18,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 02:44:44,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 633 [2023-09-01 02:44:44,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 143 transitions, 1284 flow. Second operand has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:44:44,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:44:44,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 633 [2023-09-01 02:44:44,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:44:57,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:44:59,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:45:01,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:45:03,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:45:05,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:45:07,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:45:09,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:45:11,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:45:12,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:45:14,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:45:20,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:45:22,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:45:24,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:45:26,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:45:29,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:45:31,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:45:33,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:45:35,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:45:36,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:45:38,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:46:04,161 INFO L130 PetriNetUnfolder]: 68405/96467 cut-off events. [2023-09-01 02:46:04,161 INFO L131 PetriNetUnfolder]: For 78820/78820 co-relation queries the response was YES. [2023-09-01 02:46:04,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315332 conditions, 96467 events. 68405/96467 cut-off events. For 78820/78820 co-relation queries the response was YES. Maximal size of possible extension queue 2549. Compared 637347 event pairs, 51012 based on Foata normal form. 44/67079 useless extension candidates. Maximal degree in co-relation 315286. Up to 15393 conditions per place. [2023-09-01 02:46:05,058 INFO L137 encePairwiseOnDemand]: 623/633 looper letters, 587 selfloop transitions, 120 changer transitions 0/707 dead transitions. [2023-09-01 02:46:05,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 707 transitions, 5978 flow [2023-09-01 02:46:05,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 02:46:05,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 02:46:05,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5921 transitions. [2023-09-01 02:46:05,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38974460242232756 [2023-09-01 02:46:05,068 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5921 transitions. [2023-09-01 02:46:05,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5921 transitions. [2023-09-01 02:46:05,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:46:05,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5921 transitions. [2023-09-01 02:46:05,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 246.70833333333334) internal successors, (5921), 24 states have internal predecessors, (5921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:46:05,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 633.0) internal successors, (15825), 25 states have internal predecessors, (15825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:46:05,085 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 633.0) internal successors, (15825), 25 states have internal predecessors, (15825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:46:05,085 INFO L175 Difference]: Start difference. First operand has 109 places, 143 transitions, 1284 flow. Second operand 24 states and 5921 transitions. [2023-09-01 02:46:05,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 707 transitions, 5978 flow [2023-09-01 02:46:05,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 707 transitions, 5973 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:46:05,231 INFO L231 Difference]: Finished difference. Result has 143 places, 189 transitions, 2067 flow [2023-09-01 02:46:05,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=1279, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2067, PETRI_PLACES=143, PETRI_TRANSITIONS=189} [2023-09-01 02:46:05,231 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 79 predicate places. [2023-09-01 02:46:05,232 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 189 transitions, 2067 flow [2023-09-01 02:46:05,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:46:05,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:46:05,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:46:05,241 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 (21)] Forceful destruction successful, exit code 0 [2023-09-01 02:46:05,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:05,433 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:46:05,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:46:05,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1484540470, now seen corresponding path program 1 times [2023-09-01 02:46:05,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:46:05,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746269094] [2023-09-01 02:46:05,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:46:05,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:05,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:46:05,435 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:46:05,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-09-01 02:46:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:46:05,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 02:46:05,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:46:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:46:06,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:46:24,196 WARN L222 SmtUtils]: Spent 14.92s on a formula simplification. DAG size of input: 402 DAG size of output: 354 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-09-01 02:46:24,199 INFO L321 Elim1Store]: treesize reduction 168, result has 90.7 percent of original size [2023-09-01 02:46:24,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 751 treesize of output 2180 [2023-09-01 02:46:24,691 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 02:46:24,692 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 540 treesize of output 552 [2023-09-01 02:46:25,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 02:46:25,087 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 528 treesize of output 546 [2023-09-01 02:49:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:49:15,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:15,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746269094] [2023-09-01 02:49:15,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746269094] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:49:15,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:49:15,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 02:49:15,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405149657] [2023-09-01 02:49:15,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:49:15,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 02:49:15,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:15,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 02:49:15,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 02:49:18,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:21,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:24,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:25,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:31,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:32,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 633 [2023-09-01 02:49:32,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 189 transitions, 2067 flow. Second operand has 10 states, 10 states have (on average 207.6) internal successors, (2076), 10 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:32,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:32,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 633 [2023-09-01 02:49:32,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:34,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:49:41,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:44,824 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]