./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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-simple-array-sum.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:24:39,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:24:39,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:24:39,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:24:39,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:24:39,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:24:39,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:24:39,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:24:39,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:24:39,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:24:39,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:24:39,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:24:39,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:24:39,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:24:39,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:24:39,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:24:39,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:24:39,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:24:39,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:24:39,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:24:39,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:24:39,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:24:39,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:24:39,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:24:39,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:24:39,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:24:39,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:24:39,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:24:39,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:24:39,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:24:39,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:24:39,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:24:39,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:24:39,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:24:39,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:24:39,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:24:39,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:24:39,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:24:39,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:24:39,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:24:39,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:24:39,153 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 07:24:39,187 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:24:39,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:24:39,189 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:24:39,190 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:24:39,191 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:24:39,191 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:24:39,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:24:39,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:24:39,193 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:24:39,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:24:39,194 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:24:39,194 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:24:39,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:24:39,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:24:39,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:24:39,195 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:24:39,195 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:24:39,196 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:24:39,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:24:39,196 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:24:39,196 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:24:39,196 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:24:39,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:24:39,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:24:39,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:24:39,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:24:39,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:24:39,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:24:39,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 07:24:39,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 07:24:39,199 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:24:39,199 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:24:39,199 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:24:39,199 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:24:39,200 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:24:39,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:24:39,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:24:39,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:24:39,567 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:24:39,568 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:24:39,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2023-08-30 07:24:40,869 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:24:41,087 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:24:41,088 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2023-08-30 07:24:41,099 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be723104b/a8c86d8c47fb418ebe1e902b03729842/FLAG34f6d53f2 [2023-08-30 07:24:41,117 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be723104b/a8c86d8c47fb418ebe1e902b03729842 [2023-08-30 07:24:41,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:24:41,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:24:41,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:24:41,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:24:41,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:24:41,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:24:41" (1/1) ... [2023-08-30 07:24:41,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d7b2b31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:24:41, skipping insertion in model container [2023-08-30 07:24:41,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:24:41" (1/1) ... [2023-08-30 07:24:41,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:24:41,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:24:41,322 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-simple-array-sum.wvr.c[2690,2703] [2023-08-30 07:24:41,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:24:41,350 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 07:24:41,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@51adf700 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:24:41, skipping insertion in model container [2023-08-30 07:24:41,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:24:41,353 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 07:24:41,355 INFO L158 Benchmark]: Toolchain (without parser) took 233.83ms. Allocated memory is still 60.8MB. Free memory was 29.1MB in the beginning and 35.1MB in the end (delta: -6.1MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. [2023-08-30 07:24:41,356 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 50.3MB. Free memory was 28.5MB in the beginning and 28.5MB in the end (delta: 50.2kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 07:24:41,357 INFO L158 Benchmark]: CACSL2BoogieTranslator took 225.05ms. Allocated memory is still 60.8MB. Free memory was 28.9MB in the beginning and 35.1MB in the end (delta: -6.2MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. [2023-08-30 07:24:41,358 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 50.3MB. Free memory was 28.5MB in the beginning and 28.5MB in the end (delta: 50.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 225.05ms. Allocated memory is still 60.8MB. Free memory was 28.9MB in the beginning and 35.1MB in the end (delta: -6.2MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 112]: 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-simple-array-sum.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:24:43,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:24:43,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:24:43,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:24:43,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:24:43,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:24:43,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:24:43,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:24:43,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:24:43,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:24:43,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:24:43,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:24:43,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:24:43,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:24:43,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:24:43,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:24:43,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:24:43,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:24:43,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:24:43,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:24:43,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:24:43,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:24:43,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:24:43,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:24:43,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:24:43,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:24:43,177 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:24:43,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:24:43,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:24:43,179 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:24:43,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:24:43,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:24:43,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:24:43,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:24:43,182 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:24:43,182 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:24:43,183 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:24:43,183 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:24:43,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:24:43,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:24:43,184 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:24:43,186 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 07:24:43,218 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:24:43,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:24:43,220 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:24:43,220 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:24:43,221 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:24:43,221 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:24:43,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:24:43,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:24:43,222 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:24:43,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:24:43,223 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:24:43,223 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:24:43,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:24:43,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:24:43,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:24:43,224 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:24:43,225 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:24:43,225 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:24:43,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:24:43,225 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:24:43,225 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 07:24:43,225 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 07:24:43,226 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:24:43,226 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:24:43,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:24:43,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:24:43,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:24:43,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:24:43,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:24:43,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:24:43,227 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 07:24:43,228 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 07:24:43,228 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:24:43,228 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:24:43,228 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:24:43,229 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 07:24:43,229 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:24:43,229 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:24:43,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:24:43,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:24:43,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:24:43,581 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:24:43,581 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:24:43,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2023-08-30 07:24:44,748 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:24:44,960 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:24:44,961 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2023-08-30 07:24:44,966 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f65d7c038/634c49382d3b4c1aba9549e0b93fe0d4/FLAG9aef26823 [2023-08-30 07:24:44,978 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f65d7c038/634c49382d3b4c1aba9549e0b93fe0d4 [2023-08-30 07:24:44,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:24:44,981 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:24:44,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:24:44,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:24:44,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:24:44,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:24:44" (1/1) ... [2023-08-30 07:24:44,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a6e258b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:24:44, skipping insertion in model container [2023-08-30 07:24:44,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:24:44" (1/1) ... [2023-08-30 07:24:44,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:24:45,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:24:45,159 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-simple-array-sum.wvr.c[2690,2703] [2023-08-30 07:24:45,166 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:24:45,177 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 07:24:45,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:24:45,193 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-simple-array-sum.wvr.c[2690,2703] [2023-08-30 07:24:45,196 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:24:45,209 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 07:24:45,230 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-simple-array-sum.wvr.c[2690,2703] [2023-08-30 07:24:45,233 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:24:45,242 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:24:45,242 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:24:45,248 INFO L208 MainTranslator]: Completed translation [2023-08-30 07:24:45,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:24:45 WrapperNode [2023-08-30 07:24:45,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:24:45,250 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 07:24:45,250 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 07:24:45,250 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 07:24:45,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:24:45" (1/1) ... [2023-08-30 07:24:45,280 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:24:45" (1/1) ... [2023-08-30 07:24:45,308 INFO L138 Inliner]: procedures = 28, calls = 43, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 123 [2023-08-30 07:24:45,309 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 07:24:45,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 07:24:45,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 07:24:45,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 07:24:45,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:24:45" (1/1) ... [2023-08-30 07:24:45,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:24:45" (1/1) ... [2023-08-30 07:24:45,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:24:45" (1/1) ... [2023-08-30 07:24:45,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:24:45" (1/1) ... [2023-08-30 07:24:45,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:24:45" (1/1) ... [2023-08-30 07:24:45,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:24:45" (1/1) ... [2023-08-30 07:24:45,365 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:24:45" (1/1) ... [2023-08-30 07:24:45,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:24:45" (1/1) ... [2023-08-30 07:24:45,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 07:24:45,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 07:24:45,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 07:24:45,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 07:24:45,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:24:45" (1/1) ... [2023-08-30 07:24:45,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:24:45,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:24:45,415 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 07:24:45,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 07:24:45,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 07:24:45,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 07:24:45,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 07:24:45,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 07:24:45,458 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 07:24:45,458 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 07:24:45,458 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 07:24:45,458 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 07:24:45,458 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 07:24:45,459 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 07:24:45,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 07:24:45,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 07:24:45,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 07:24:45,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 07:24:45,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 07:24:45,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 07:24:45,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 07:24:45,461 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 07:24:45,572 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 07:24:45,574 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 07:24:46,052 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 07:24:46,106 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 07:24:46,108 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 07:24:46,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:24:46 BoogieIcfgContainer [2023-08-30 07:24:46,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 07:24:46,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 07:24:46,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 07:24:46,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 07:24:46,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:24:44" (1/3) ... [2023-08-30 07:24:46,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6429409c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:24:46, skipping insertion in model container [2023-08-30 07:24:46,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:24:45" (2/3) ... [2023-08-30 07:24:46,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6429409c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:24:46, skipping insertion in model container [2023-08-30 07:24:46,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:24:46" (3/3) ... [2023-08-30 07:24:46,118 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2023-08-30 07:24:46,134 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 07:24:46,135 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-08-30 07:24:46,135 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 07:24:46,289 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 07:24:46,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 201 transitions, 426 flow [2023-08-30 07:24:46,421 INFO L130 PetriNetUnfolder]: 16/198 cut-off events. [2023-08-30 07:24:46,429 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:24:46,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 198 events. 16/198 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 229 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 148. Up to 3 conditions per place. [2023-08-30 07:24:46,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 201 transitions, 426 flow [2023-08-30 07:24:46,446 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 188 places, 194 transitions, 406 flow [2023-08-30 07:24:46,451 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 07:24:46,463 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 194 transitions, 406 flow [2023-08-30 07:24:46,467 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 194 transitions, 406 flow [2023-08-30 07:24:46,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 194 transitions, 406 flow [2023-08-30 07:24:46,529 INFO L130 PetriNetUnfolder]: 16/194 cut-off events. [2023-08-30 07:24:46,529 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:24:46,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 194 events. 16/194 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 229 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 148. Up to 3 conditions per place. [2023-08-30 07:24:46,534 INFO L119 LiptonReduction]: Number of co-enabled transitions 2868 [2023-08-30 07:25:03,521 INFO L134 LiptonReduction]: Checked pairs total: 4560 [2023-08-30 07:25:03,522 INFO L136 LiptonReduction]: Total number of compositions: 199 [2023-08-30 07:25:03,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 07:25:03,539 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;@6d4a7ca0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 07:25:03,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2023-08-30 07:25:03,543 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 07:25:03,543 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:25:03,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:03,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:25:03,545 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:25:03,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:03,549 INFO L85 PathProgramCache]: Analyzing trace with hash 24254, now seen corresponding path program 1 times [2023-08-30 07:25:03,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:03,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549790773] [2023-08-30 07:25:03,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:03,571 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:03,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:03,577 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:25:03,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 07:25:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:03,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:25:03,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:03,924 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 07:25:03,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 07:25:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:25:03,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:25:03,970 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:03,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549790773] [2023-08-30 07:25:03,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549790773] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:25:03,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:25:03,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:25:03,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672583067] [2023-08-30 07:25:03,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:25:03,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:25:03,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:04,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:25:04,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:25:04,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 400 [2023-08-30 07:25:04,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:04,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:04,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 400 [2023-08-30 07:25:04,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:05,230 INFO L130 PetriNetUnfolder]: 5485/6850 cut-off events. [2023-08-30 07:25:05,230 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2023-08-30 07:25:05,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13811 conditions, 6850 events. 5485/6850 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 29507 event pairs, 2611 based on Foata normal form. 0/1898 useless extension candidates. Maximal degree in co-relation 11877. Up to 6809 conditions per place. [2023-08-30 07:25:05,357 INFO L137 encePairwiseOnDemand]: 396/400 looper letters, 47 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-30 07:25:05,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 216 flow [2023-08-30 07:25:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:25:05,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:25:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 558 transitions. [2023-08-30 07:25:05,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2023-08-30 07:25:05,385 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 558 transitions. [2023-08-30 07:25:05,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 558 transitions. [2023-08-30 07:25:05,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:05,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 558 transitions. [2023-08-30 07:25:05,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:05,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:05,399 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:05,403 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 126 flow. Second operand 3 states and 558 transitions. [2023-08-30 07:25:05,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 216 flow [2023-08-30 07:25:05,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 07:25:05,420 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 110 flow [2023-08-30 07:25:05,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2023-08-30 07:25:05,425 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -7 predicate places. [2023-08-30 07:25:05,426 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 110 flow [2023-08-30 07:25:05,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:05,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:05,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:25:05,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 07:25:05,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:05,637 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:25:05,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:05,638 INFO L85 PathProgramCache]: Analyzing trace with hash 24255, now seen corresponding path program 1 times [2023-08-30 07:25:05,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:05,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771212076] [2023-08-30 07:25:05,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:05,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:05,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:05,641 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:25:05,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 07:25:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:05,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:25:05,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:05,864 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:25:05,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:25:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:25:05,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:25:05,909 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:05,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771212076] [2023-08-30 07:25:05,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771212076] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:25:05,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:25:05,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:25:05,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122231311] [2023-08-30 07:25:05,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:25:05,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:25:05,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:05,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:25:05,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:25:06,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 400 [2023-08-30 07:25:06,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:06,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:06,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 400 [2023-08-30 07:25:06,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:07,477 INFO L130 PetriNetUnfolder]: 10969/13697 cut-off events. [2023-08-30 07:25:07,477 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 07:25:07,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27408 conditions, 13697 events. 10969/13697 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 1204. Compared 63988 event pairs, 5222 based on Foata normal form. 0/3705 useless extension candidates. Maximal degree in co-relation 27402. Up to 6810 conditions per place. [2023-08-30 07:25:07,598 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 89 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-08-30 07:25:07,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 96 transitions, 392 flow [2023-08-30 07:25:07,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:25:07,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:25:07,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 602 transitions. [2023-08-30 07:25:07,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016666666666667 [2023-08-30 07:25:07,603 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 602 transitions. [2023-08-30 07:25:07,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 602 transitions. [2023-08-30 07:25:07,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:07,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 602 transitions. [2023-08-30 07:25:07,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:07,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:07,610 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:07,610 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 110 flow. Second operand 3 states and 602 transitions. [2023-08-30 07:25:07,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 96 transitions, 392 flow [2023-08-30 07:25:07,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 96 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:25:07,613 INFO L231 Difference]: Finished difference. Result has 54 places, 54 transitions, 141 flow [2023-08-30 07:25:07,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=54, PETRI_TRANSITIONS=54} [2023-08-30 07:25:07,614 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-08-30 07:25:07,614 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 54 transitions, 141 flow [2023-08-30 07:25:07,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:07,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:07,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:25:07,624 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 [2023-08-30 07:25:07,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:07,825 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:25:07,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:07,825 INFO L85 PathProgramCache]: Analyzing trace with hash 754150, now seen corresponding path program 1 times [2023-08-30 07:25:07,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:07,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129283492] [2023-08-30 07:25:07,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:07,826 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:07,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:07,829 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:25:07,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 07:25:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:07,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:25:07,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:08,000 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:25:08,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:25:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:25:08,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:25:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:25:08,247 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:08,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129283492] [2023-08-30 07:25:08,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129283492] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:25:08,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:25:08,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 07:25:08,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137608723] [2023-08-30 07:25:08,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:25:08,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:25:08,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:08,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:25:08,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:25:09,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 400 [2023-08-30 07:25:09,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 54 transitions, 141 flow. Second operand has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:09,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:09,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 400 [2023-08-30 07:25:09,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:12,322 INFO L130 PetriNetUnfolder]: 16461/20556 cut-off events. [2023-08-30 07:25:12,323 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-08-30 07:25:12,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41157 conditions, 20556 events. 16461/20556 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 1568. Compared 99971 event pairs, 7833 based on Foata normal form. 0/5631 useless extension candidates. Maximal degree in co-relation 41148. Up to 6811 conditions per place. [2023-08-30 07:25:12,520 INFO L137 encePairwiseOnDemand]: 391/400 looper letters, 131 selfloop transitions, 19 changer transitions 0/153 dead transitions. [2023-08-30 07:25:12,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 153 transitions, 675 flow [2023-08-30 07:25:12,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:25:12,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:25:12,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1110 transitions. [2023-08-30 07:25:12,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2023-08-30 07:25:12,525 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1110 transitions. [2023-08-30 07:25:12,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1110 transitions. [2023-08-30 07:25:12,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:12,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1110 transitions. [2023-08-30 07:25:12,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:12,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 400.0) internal successors, (2800), 7 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:12,536 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 400.0) internal successors, (2800), 7 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:12,538 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 141 flow. Second operand 6 states and 1110 transitions. [2023-08-30 07:25:12,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 153 transitions, 675 flow [2023-08-30 07:25:12,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 153 transitions, 661 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:25:12,543 INFO L231 Difference]: Finished difference. Result has 61 places, 69 transitions, 278 flow [2023-08-30 07:25:12,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=278, PETRI_PLACES=61, PETRI_TRANSITIONS=69} [2023-08-30 07:25:12,546 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-30 07:25:12,546 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 69 transitions, 278 flow [2023-08-30 07:25:12,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:12,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:12,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:25:12,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 07:25:12,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:12,769 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:25:12,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:12,769 INFO L85 PathProgramCache]: Analyzing trace with hash 754615, now seen corresponding path program 1 times [2023-08-30 07:25:12,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:12,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508939576] [2023-08-30 07:25:12,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:12,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:12,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:12,772 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:25:12,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 07:25:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:12,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 07:25:12,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:12,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:25:12,931 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 07:25:12,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-30 07:25:13,311 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-08-30 07:25:13,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 07:25:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:25:13,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:25:13,375 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:13,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508939576] [2023-08-30 07:25:13,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508939576] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:25:13,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:25:13,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:25:13,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555623965] [2023-08-30 07:25:13,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:25:13,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:25:13,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:13,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:25:13,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:25:13,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 400 [2023-08-30 07:25:13,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 69 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:13,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:13,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 400 [2023-08-30 07:25:13,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:15,296 INFO L130 PetriNetUnfolder]: 12922/16294 cut-off events. [2023-08-30 07:25:15,296 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-30 07:25:15,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32681 conditions, 16294 events. 12922/16294 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 1275. Compared 79702 event pairs, 6132 based on Foata normal form. 0/4579 useless extension candidates. Maximal degree in co-relation 32668. Up to 16171 conditions per place. [2023-08-30 07:25:15,394 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 61 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-08-30 07:25:15,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 65 transitions, 382 flow [2023-08-30 07:25:15,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:25:15,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:25:15,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 564 transitions. [2023-08-30 07:25:15,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2023-08-30 07:25:15,398 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 564 transitions. [2023-08-30 07:25:15,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 564 transitions. [2023-08-30 07:25:15,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:15,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 564 transitions. [2023-08-30 07:25:15,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:15,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:15,403 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:15,403 INFO L175 Difference]: Start difference. First operand has 61 places, 69 transitions, 278 flow. Second operand 3 states and 564 transitions. [2023-08-30 07:25:15,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 65 transitions, 382 flow [2023-08-30 07:25:15,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 65 transitions, 363 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 07:25:15,406 INFO L231 Difference]: Finished difference. Result has 60 places, 65 transitions, 241 flow [2023-08-30 07:25:15,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=60, PETRI_TRANSITIONS=65} [2023-08-30 07:25:15,408 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2023-08-30 07:25:15,408 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 65 transitions, 241 flow [2023-08-30 07:25:15,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:15,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:15,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:25:15,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 07:25:15,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:15,619 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:25:15,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:15,620 INFO L85 PathProgramCache]: Analyzing trace with hash 754613, now seen corresponding path program 1 times [2023-08-30 07:25:15,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:15,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13385292] [2023-08-30 07:25:15,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:15,624 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:15,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:15,625 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:25:15,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 07:25:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:15,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 07:25:15,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:15,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:25:15,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:25:15,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:25:15,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:25:15,797 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 07:25:15,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 07:25:15,822 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 07:25:15,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 07:25:15,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:25:15,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 07:25:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:25:15,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:25:15,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:15,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13385292] [2023-08-30 07:25:15,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13385292] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:25:15,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:25:15,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:25:15,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462182170] [2023-08-30 07:25:15,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:25:15,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:25:15,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:15,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:25:15,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:25:16,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 400 [2023-08-30 07:25:16,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 65 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:16,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:16,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 400 [2023-08-30 07:25:16,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:17,302 INFO L130 PetriNetUnfolder]: 9383/12032 cut-off events. [2023-08-30 07:25:17,302 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 07:25:17,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24138 conditions, 12032 events. 9383/12032 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 59505 event pairs, 4431 based on Foata normal form. 0/3766 useless extension candidates. Maximal degree in co-relation 24124. Up to 11909 conditions per place. [2023-08-30 07:25:17,381 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 57 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-08-30 07:25:17,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 61 transitions, 337 flow [2023-08-30 07:25:17,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:25:17,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:25:17,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2023-08-30 07:25:17,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2023-08-30 07:25:17,384 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2023-08-30 07:25:17,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2023-08-30 07:25:17,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:17,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2023-08-30 07:25:17,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:17,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:17,392 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:17,392 INFO L175 Difference]: Start difference. First operand has 60 places, 65 transitions, 241 flow. Second operand 3 states and 565 transitions. [2023-08-30 07:25:17,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 61 transitions, 337 flow [2023-08-30 07:25:17,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 61 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:25:17,395 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 222 flow [2023-08-30 07:25:17,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2023-08-30 07:25:17,399 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 1 predicate places. [2023-08-30 07:25:17,399 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 222 flow [2023-08-30 07:25:17,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:17,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:17,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:25:17,411 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 (6)] Forceful destruction successful, exit code 0 [2023-08-30 07:25:17,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:17,609 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:25:17,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:17,610 INFO L85 PathProgramCache]: Analyzing trace with hash 725200990, now seen corresponding path program 1 times [2023-08-30 07:25:17,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:17,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309231509] [2023-08-30 07:25:17,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:17,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:17,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:17,611 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:25:17,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 07:25:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:17,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 07:25:17,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:17,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:25:17,762 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 07:25:17,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-30 07:25:18,043 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-30 07:25:18,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 07:25:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:25:18,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:25:18,182 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:18,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309231509] [2023-08-30 07:25:18,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309231509] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:25:18,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:25:18,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:25:18,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091846981] [2023-08-30 07:25:18,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:25:18,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:25:18,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:18,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:25:18,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:25:18,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 400 [2023-08-30 07:25:18,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:18,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:18,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 400 [2023-08-30 07:25:18,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:19,036 INFO L130 PetriNetUnfolder]: 8864/11354 cut-off events. [2023-08-30 07:25:19,037 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 07:25:19,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22783 conditions, 11354 events. 8864/11354 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 821. Compared 55579 event pairs, 4176 based on Foata normal form. 0/3634 useless extension candidates. Maximal degree in co-relation 22768. Up to 11231 conditions per place. [2023-08-30 07:25:19,140 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 55 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-08-30 07:25:19,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 59 transitions, 330 flow [2023-08-30 07:25:19,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:25:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:25:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-08-30 07:25:19,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-30 07:25:19,144 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-08-30 07:25:19,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-08-30 07:25:19,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:19,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-08-30 07:25:19,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:19,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:19,149 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:19,149 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 222 flow. Second operand 3 states and 560 transitions. [2023-08-30 07:25:19,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 59 transitions, 330 flow [2023-08-30 07:25:19,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 329 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:25:19,151 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 219 flow [2023-08-30 07:25:19,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2023-08-30 07:25:19,154 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 0 predicate places. [2023-08-30 07:25:19,154 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 219 flow [2023-08-30 07:25:19,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:19,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:19,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:25:19,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 07:25:19,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:19,355 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:25:19,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:19,356 INFO L85 PathProgramCache]: Analyzing trace with hash 725200988, now seen corresponding path program 1 times [2023-08-30 07:25:19,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:19,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705733752] [2023-08-30 07:25:19,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:19,356 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:19,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:19,357 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:25:19,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 07:25:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:19,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:25:19,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:19,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:25:19,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:25:19,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:25:19,552 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 07:25:19,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 07:25:19,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 07:25:19,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:25:19,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 07:25:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:25:19,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:25:19,662 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:19,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705733752] [2023-08-30 07:25:19,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705733752] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:25:19,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:25:19,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:25:19,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137696198] [2023-08-30 07:25:19,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:25:19,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:25:19,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:19,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:25:19,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:25:19,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 400 [2023-08-30 07:25:19,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:19,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:19,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 400 [2023-08-30 07:25:19,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:20,522 INFO L130 PetriNetUnfolder]: 8345/10676 cut-off events. [2023-08-30 07:25:20,522 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 07:25:20,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21428 conditions, 10676 events. 8345/10676 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 51694 event pairs, 3921 based on Foata normal form. 0/3502 useless extension candidates. Maximal degree in co-relation 21412. Up to 10553 conditions per place. [2023-08-30 07:25:20,582 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 53 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-08-30 07:25:20,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 323 flow [2023-08-30 07:25:20,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:25:20,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:25:20,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-08-30 07:25:20,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675 [2023-08-30 07:25:20,585 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-08-30 07:25:20,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-08-30 07:25:20,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:20,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-08-30 07:25:20,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:20,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:20,590 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:20,590 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 219 flow. Second operand 3 states and 561 transitions. [2023-08-30 07:25:20,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 323 flow [2023-08-30 07:25:20,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 57 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:25:20,592 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 216 flow [2023-08-30 07:25:20,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2023-08-30 07:25:20,593 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -1 predicate places. [2023-08-30 07:25:20,593 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 216 flow [2023-08-30 07:25:20,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:20,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:20,594 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 07:25:20,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 07:25:20,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:20,804 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:25:20,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:20,804 INFO L85 PathProgramCache]: Analyzing trace with hash 994275455, now seen corresponding path program 2 times [2023-08-30 07:25:20,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:20,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497048272] [2023-08-30 07:25:20,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:25:20,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:20,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:20,806 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:25:20,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 07:25:20,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:25:20,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:25:20,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:25:20,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:20,973 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:25:20,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:25:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:25:21,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:25:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:25:21,728 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:21,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497048272] [2023-08-30 07:25:21,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497048272] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:25:21,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:25:21,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:25:21,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135312533] [2023-08-30 07:25:21,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:25:21,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:25:21,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:21,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:25:21,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:25:25,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 400 [2023-08-30 07:25:25,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 216 flow. Second operand has 12 states, 12 states have (on average 162.0) internal successors, (1944), 12 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:25,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:25,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 400 [2023-08-30 07:25:25,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:27,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:25:29,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:25:31,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:25:33,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:25:34,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:25:36,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:25:42,495 INFO L130 PetriNetUnfolder]: 27803/35557 cut-off events. [2023-08-30 07:25:42,495 INFO L131 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2023-08-30 07:25:42,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71274 conditions, 35557 events. 27803/35557 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 1407. Compared 188279 event pairs, 13070 based on Foata normal form. 12/12102 useless extension candidates. Maximal degree in co-relation 71257. Up to 3523 conditions per place. [2023-08-30 07:25:42,730 INFO L137 encePairwiseOnDemand]: 393/400 looper letters, 345 selfloop transitions, 32 changer transitions 0/380 dead transitions. [2023-08-30 07:25:42,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 380 transitions, 1774 flow [2023-08-30 07:25:42,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:25:42,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:25:42,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2321 transitions. [2023-08-30 07:25:42,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48354166666666665 [2023-08-30 07:25:42,739 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2321 transitions. [2023-08-30 07:25:42,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2321 transitions. [2023-08-30 07:25:42,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:42,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2321 transitions. [2023-08-30 07:25:42,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 193.41666666666666) internal successors, (2321), 12 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:42,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 400.0) internal successors, (5200), 13 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:42,755 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 400.0) internal successors, (5200), 13 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:42,755 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 216 flow. Second operand 12 states and 2321 transitions. [2023-08-30 07:25:42,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 380 transitions, 1774 flow [2023-08-30 07:25:42,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 380 transitions, 1773 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:25:42,762 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 459 flow [2023-08-30 07:25:42,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=459, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-08-30 07:25:42,764 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2023-08-30 07:25:42,764 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 459 flow [2023-08-30 07:25:42,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 162.0) internal successors, (1944), 12 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:42,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:42,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:25:42,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 07:25:42,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:42,976 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:25:42,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:42,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1006388151, now seen corresponding path program 1 times [2023-08-30 07:25:42,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:42,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757225930] [2023-08-30 07:25:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:42,977 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:42,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:42,978 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:25:42,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 07:25:43,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:43,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:25:43,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:25:43,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:25:43,096 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:43,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757225930] [2023-08-30 07:25:43,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757225930] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:25:43,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:25:43,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:25:43,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182354608] [2023-08-30 07:25:43,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:25:43,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:25:43,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:43,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:25:43,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:25:43,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 400 [2023-08-30 07:25:43,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 459 flow. Second operand has 5 states, 5 states have (on average 168.2) internal successors, (841), 5 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:43,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:43,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 400 [2023-08-30 07:25:43,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:45,296 INFO L130 PetriNetUnfolder]: 23353/30848 cut-off events. [2023-08-30 07:25:45,296 INFO L131 PetriNetUnfolder]: For 143/143 co-relation queries the response was YES. [2023-08-30 07:25:45,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61961 conditions, 30848 events. 23353/30848 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 1353. Compared 175424 event pairs, 11908 based on Foata normal form. 1/11872 useless extension candidates. Maximal degree in co-relation 61936. Up to 28376 conditions per place. [2023-08-30 07:25:45,493 INFO L137 encePairwiseOnDemand]: 391/400 looper letters, 111 selfloop transitions, 16 changer transitions 0/129 dead transitions. [2023-08-30 07:25:45,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 129 transitions, 835 flow [2023-08-30 07:25:45,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:25:45,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:25:45,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 936 transitions. [2023-08-30 07:25:45,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.468 [2023-08-30 07:25:45,496 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 936 transitions. [2023-08-30 07:25:45,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 936 transitions. [2023-08-30 07:25:45,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:45,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 936 transitions. [2023-08-30 07:25:45,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 187.2) internal successors, (936), 5 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:45,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:45,502 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:45,502 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 459 flow. Second operand 5 states and 936 transitions. [2023-08-30 07:25:45,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 129 transitions, 835 flow [2023-08-30 07:25:45,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 129 transitions, 776 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-30 07:25:45,507 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 469 flow [2023-08-30 07:25:45,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=469, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2023-08-30 07:25:45,507 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 19 predicate places. [2023-08-30 07:25:45,508 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 469 flow [2023-08-30 07:25:45,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 168.2) internal successors, (841), 5 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:45,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:45,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:25:45,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 07:25:45,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:45,721 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:25:45,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:45,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1133465548, now seen corresponding path program 1 times [2023-08-30 07:25:45,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:45,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538108394] [2023-08-30 07:25:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:45,722 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:45,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:45,730 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:25:45,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 07:25:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:45,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:25:45,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:45,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:25:45,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:25:45,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:25:45,873 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 07:25:45,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 07:25:45,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-30 07:25:45,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:25:45,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 07:25:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:25:45,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:25:45,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:45,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538108394] [2023-08-30 07:25:45,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538108394] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:25:45,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:25:45,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:25:45,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084650233] [2023-08-30 07:25:45,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:25:45,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:25:45,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:45,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:25:45,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:25:46,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 400 [2023-08-30 07:25:46,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 469 flow. Second operand has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:46,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:46,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 400 [2023-08-30 07:25:46,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:48,647 INFO L130 PetriNetUnfolder]: 25566/32496 cut-off events. [2023-08-30 07:25:48,647 INFO L131 PetriNetUnfolder]: For 1848/1961 co-relation queries the response was YES. [2023-08-30 07:25:48,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71645 conditions, 32496 events. 25566/32496 cut-off events. For 1848/1961 co-relation queries the response was YES. Maximal size of possible extension queue 1321. Compared 170616 event pairs, 11840 based on Foata normal form. 113/13279 useless extension candidates. Maximal degree in co-relation 71616. Up to 32182 conditions per place. [2023-08-30 07:25:48,806 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 71 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-08-30 07:25:48,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 76 transitions, 609 flow [2023-08-30 07:25:48,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:25:48,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:25:48,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2023-08-30 07:25:48,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608333333333333 [2023-08-30 07:25:48,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2023-08-30 07:25:48,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2023-08-30 07:25:48,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:48,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2023-08-30 07:25:48,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:48,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:48,813 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:48,813 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 469 flow. Second operand 3 states and 553 transitions. [2023-08-30 07:25:48,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 76 transitions, 609 flow [2023-08-30 07:25:48,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 76 transitions, 577 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 07:25:48,824 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 435 flow [2023-08-30 07:25:48,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=435, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2023-08-30 07:25:48,824 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 17 predicate places. [2023-08-30 07:25:48,825 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 435 flow [2023-08-30 07:25:48,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:48,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:48,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:25:48,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 07:25:49,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:49,035 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:25:49,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:49,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1133465547, now seen corresponding path program 1 times [2023-08-30 07:25:49,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:49,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118022187] [2023-08-30 07:25:49,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:49,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:49,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:49,037 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:25:49,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 07:25:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:49,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:25:49,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:49,178 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 07:25:49,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-30 07:25:49,206 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 07:25:49,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 07:25:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:25:49,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:25:49,220 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:49,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118022187] [2023-08-30 07:25:49,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118022187] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:25:49,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:25:49,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:25:49,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463091220] [2023-08-30 07:25:49,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:25:49,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:25:49,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:49,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:25:49,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:25:49,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 400 [2023-08-30 07:25:49,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 435 flow. Second operand has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:49,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:49,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 400 [2023-08-30 07:25:49,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:51,162 INFO L130 PetriNetUnfolder]: 23669/30163 cut-off events. [2023-08-30 07:25:51,163 INFO L131 PetriNetUnfolder]: For 1998/2103 co-relation queries the response was YES. [2023-08-30 07:25:51,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66280 conditions, 30163 events. 23669/30163 cut-off events. For 1998/2103 co-relation queries the response was YES. Maximal size of possible extension queue 1297. Compared 157652 event pairs, 11077 based on Foata normal form. 105/12572 useless extension candidates. Maximal degree in co-relation 66251. Up to 29786 conditions per place. [2023-08-30 07:25:51,430 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 69 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-08-30 07:25:51,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 74 transitions, 571 flow [2023-08-30 07:25:51,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:25:51,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:25:51,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 548 transitions. [2023-08-30 07:25:51,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45666666666666667 [2023-08-30 07:25:51,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 548 transitions. [2023-08-30 07:25:51,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 548 transitions. [2023-08-30 07:25:51,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:51,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 548 transitions. [2023-08-30 07:25:51,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:51,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:51,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:51,436 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 435 flow. Second operand 3 states and 548 transitions. [2023-08-30 07:25:51,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 74 transitions, 571 flow [2023-08-30 07:25:51,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 570 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:25:51,449 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 432 flow [2023-08-30 07:25:51,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=72, 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=432, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2023-08-30 07:25:51,450 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2023-08-30 07:25:51,451 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 432 flow [2023-08-30 07:25:51,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:51,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:51,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:25:51,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 07:25:51,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:51,661 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:25:51,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:51,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1881701959, now seen corresponding path program 1 times [2023-08-30 07:25:51,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:51,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674782035] [2023-08-30 07:25:51,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:51,662 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:51,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:51,663 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:25:51,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 07:25:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:51,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:25:51,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:51,882 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:25:51,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:25:51,964 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-08-30 07:25:51,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 07:25:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:25:52,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:25:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:25:52,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:52,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674782035] [2023-08-30 07:25:52,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674782035] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:25:52,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:25:52,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 07:25:52,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432028369] [2023-08-30 07:25:52,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:25:52,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:25:52,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:52,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:25:52,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:25:54,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 400 [2023-08-30 07:25:54,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 432 flow. Second operand has 10 states, 10 states have (on average 152.6) internal successors, (1526), 10 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:54,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:54,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 400 [2023-08-30 07:25:54,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:26:07,496 INFO L130 PetriNetUnfolder]: 89609/116410 cut-off events. [2023-08-30 07:26:07,497 INFO L131 PetriNetUnfolder]: For 6779/6779 co-relation queries the response was YES. [2023-08-30 07:26:08,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249596 conditions, 116410 events. 89609/116410 cut-off events. For 6779/6779 co-relation queries the response was YES. Maximal size of possible extension queue 5170. Compared 741944 event pairs, 31818 based on Foata normal form. 116/50497 useless extension candidates. Maximal degree in co-relation 249566. Up to 17191 conditions per place. [2023-08-30 07:26:08,422 INFO L137 encePairwiseOnDemand]: 389/400 looper letters, 477 selfloop transitions, 52 changer transitions 0/531 dead transitions. [2023-08-30 07:26:08,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 531 transitions, 2797 flow [2023-08-30 07:26:08,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 07:26:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 07:26:08,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4279 transitions. [2023-08-30 07:26:08,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279 [2023-08-30 07:26:08,434 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4279 transitions. [2023-08-30 07:26:08,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4279 transitions. [2023-08-30 07:26:08,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:26:08,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4279 transitions. [2023-08-30 07:26:08,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 171.16) internal successors, (4279), 25 states have internal predecessors, (4279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:08,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 400.0) internal successors, (10400), 26 states have internal predecessors, (10400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:08,462 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 400.0) internal successors, (10400), 26 states have internal predecessors, (10400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:08,462 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 432 flow. Second operand 25 states and 4279 transitions. [2023-08-30 07:26:08,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 531 transitions, 2797 flow [2023-08-30 07:26:08,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 531 transitions, 2796 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:26:08,571 INFO L231 Difference]: Finished difference. Result has 105 places, 104 transitions, 784 flow [2023-08-30 07:26:08,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=784, PETRI_PLACES=105, PETRI_TRANSITIONS=104} [2023-08-30 07:26:08,572 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 47 predicate places. [2023-08-30 07:26:08,572 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 104 transitions, 784 flow [2023-08-30 07:26:08,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 152.6) internal successors, (1526), 10 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:08,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:26:08,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:26:08,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 07:26:08,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:08,793 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:26:08,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:26:08,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1881701960, now seen corresponding path program 1 times [2023-08-30 07:26:08,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:26:08,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892394696] [2023-08-30 07:26:08,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:26:08,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:08,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:26:08,795 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:26:08,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 07:26:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:26:08,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 07:26:08,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:26:08,966 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 07:26:08,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 07:26:08,999 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 07:26:08,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 07:26:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:26:09,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:26:09,012 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:26:09,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892394696] [2023-08-30 07:26:09,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892394696] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:26:09,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:26:09,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:26:09,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783399020] [2023-08-30 07:26:09,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:26:09,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:26:09,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:26:09,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:26:09,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:26:09,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 400 [2023-08-30 07:26:09,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 104 transitions, 784 flow. Second operand has 4 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:09,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:26:09,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 400 [2023-08-30 07:26:09,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:26:15,774 INFO L130 PetriNetUnfolder]: 57139/74345 cut-off events. [2023-08-30 07:26:15,775 INFO L131 PetriNetUnfolder]: For 114375/116288 co-relation queries the response was YES. [2023-08-30 07:26:16,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207143 conditions, 74345 events. 57139/74345 cut-off events. For 114375/116288 co-relation queries the response was YES. Maximal size of possible extension queue 3265. Compared 458097 event pairs, 28990 based on Foata normal form. 6962/41716 useless extension candidates. Maximal degree in co-relation 207104. Up to 73604 conditions per place. [2023-08-30 07:26:16,469 INFO L137 encePairwiseOnDemand]: 396/400 looper letters, 78 selfloop transitions, 12 changer transitions 0/102 dead transitions. [2023-08-30 07:26:16,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 102 transitions, 958 flow [2023-08-30 07:26:16,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:26:16,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:26:16,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 692 transitions. [2023-08-30 07:26:16,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2023-08-30 07:26:16,472 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 692 transitions. [2023-08-30 07:26:16,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 692 transitions. [2023-08-30 07:26:16,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:26:16,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 692 transitions. [2023-08-30 07:26:16,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:16,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:16,475 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:16,475 INFO L175 Difference]: Start difference. First operand has 105 places, 104 transitions, 784 flow. Second operand 4 states and 692 transitions. [2023-08-30 07:26:16,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 102 transitions, 958 flow [2023-08-30 07:26:16,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 102 transitions, 859 flow, removed 30 selfloop flow, removed 4 redundant places. [2023-08-30 07:26:16,819 INFO L231 Difference]: Finished difference. Result has 102 places, 102 transitions, 703 flow [2023-08-30 07:26:16,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=703, PETRI_PLACES=102, PETRI_TRANSITIONS=102} [2023-08-30 07:26:16,819 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 44 predicate places. [2023-08-30 07:26:16,820 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 102 transitions, 703 flow [2023-08-30 07:26:16,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:16,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:26:16,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:26:16,828 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 (14)] Ended with exit code 0 [2023-08-30 07:26:17,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:17,021 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:26:17,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:26:17,021 INFO L85 PathProgramCache]: Analyzing trace with hash 777687685, now seen corresponding path program 1 times [2023-08-30 07:26:17,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:26:17,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797926888] [2023-08-30 07:26:17,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:26:17,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:17,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:26:17,023 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:26:17,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 07:26:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:26:17,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:26:17,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:26:17,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 07:26:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:26:17,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:26:17,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:26:17,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797926888] [2023-08-30 07:26:17,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797926888] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:26:17,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:26:17,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:26:17,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905161553] [2023-08-30 07:26:17,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:26:17,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:26:17,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:26:17,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:26:17,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:26:17,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 400 [2023-08-30 07:26:17,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 102 transitions, 703 flow. Second operand has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:17,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:26:17,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 400 [2023-08-30 07:26:17,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:26:22,157 INFO L130 PetriNetUnfolder]: 40412/53146 cut-off events. [2023-08-30 07:26:22,158 INFO L131 PetriNetUnfolder]: For 70336/71657 co-relation queries the response was YES. [2023-08-30 07:26:22,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147945 conditions, 53146 events. 40412/53146 cut-off events. For 70336/71657 co-relation queries the response was YES. Maximal size of possible extension queue 2331. Compared 321262 event pairs, 20327 based on Foata normal form. 1321/28653 useless extension candidates. Maximal degree in co-relation 147907. Up to 52458 conditions per place. [2023-08-30 07:26:22,678 INFO L137 encePairwiseOnDemand]: 396/400 looper letters, 76 selfloop transitions, 12 changer transitions 0/100 dead transitions. [2023-08-30 07:26:22,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 875 flow [2023-08-30 07:26:22,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:26:22,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:26:22,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 698 transitions. [2023-08-30 07:26:22,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43625 [2023-08-30 07:26:22,680 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 698 transitions. [2023-08-30 07:26:22,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 698 transitions. [2023-08-30 07:26:22,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:26:22,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 698 transitions. [2023-08-30 07:26:22,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:22,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:22,683 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:22,684 INFO L175 Difference]: Start difference. First operand has 102 places, 102 transitions, 703 flow. Second operand 4 states and 698 transitions. [2023-08-30 07:26:22,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 875 flow [2023-08-30 07:26:22,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 100 transitions, 862 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:26:22,885 INFO L231 Difference]: Finished difference. Result has 101 places, 100 transitions, 710 flow [2023-08-30 07:26:22,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=710, PETRI_PLACES=101, PETRI_TRANSITIONS=100} [2023-08-30 07:26:22,885 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 43 predicate places. [2023-08-30 07:26:22,885 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 100 transitions, 710 flow [2023-08-30 07:26:22,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:22,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:26:22,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:26:22,895 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 [2023-08-30 07:26:23,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:23,093 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:26:23,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:26:23,094 INFO L85 PathProgramCache]: Analyzing trace with hash 777687684, now seen corresponding path program 1 times [2023-08-30 07:26:23,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:26:23,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142392058] [2023-08-30 07:26:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:26:23,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:23,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:26:23,095 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:26:23,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 07:26:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:26:23,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:26:23,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:26:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:26:23,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:26:23,239 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:26:23,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142392058] [2023-08-30 07:26:23,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142392058] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:26:23,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:26:23,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:26:23,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065410071] [2023-08-30 07:26:23,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:26:23,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:26:23,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:26:23,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:26:23,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:26:23,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 400 [2023-08-30 07:26:23,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 100 transitions, 710 flow. Second operand has 5 states, 5 states have (on average 168.6) internal successors, (843), 5 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:23,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:26:23,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 400 [2023-08-30 07:26:23,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:26:27,769 INFO L130 PetriNetUnfolder]: 35866/48498 cut-off events. [2023-08-30 07:26:27,769 INFO L131 PetriNetUnfolder]: For 87894/89260 co-relation queries the response was YES. [2023-08-30 07:26:28,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140550 conditions, 48498 events. 35866/48498 cut-off events. For 87894/89260 co-relation queries the response was YES. Maximal size of possible extension queue 2255. Compared 310773 event pairs, 20671 based on Foata normal form. 1366/29721 useless extension candidates. Maximal degree in co-relation 140512. Up to 47843 conditions per place. [2023-08-30 07:26:28,243 INFO L137 encePairwiseOnDemand]: 391/400 looper letters, 103 selfloop transitions, 18 changer transitions 0/132 dead transitions. [2023-08-30 07:26:28,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 132 transitions, 1036 flow [2023-08-30 07:26:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:26:28,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:26:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 907 transitions. [2023-08-30 07:26:28,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4535 [2023-08-30 07:26:28,246 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 907 transitions. [2023-08-30 07:26:28,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 907 transitions. [2023-08-30 07:26:28,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:26:28,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 907 transitions. [2023-08-30 07:26:28,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 181.4) internal successors, (907), 5 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:28,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:28,250 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:28,250 INFO L175 Difference]: Start difference. First operand has 101 places, 100 transitions, 710 flow. Second operand 5 states and 907 transitions. [2023-08-30 07:26:28,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 132 transitions, 1036 flow [2023-08-30 07:26:28,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 132 transitions, 1022 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:26:28,489 INFO L231 Difference]: Finished difference. Result has 105 places, 101 transitions, 747 flow [2023-08-30 07:26:28,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=747, PETRI_PLACES=105, PETRI_TRANSITIONS=101} [2023-08-30 07:26:28,490 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 47 predicate places. [2023-08-30 07:26:28,490 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 101 transitions, 747 flow [2023-08-30 07:26:28,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 168.6) internal successors, (843), 5 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:28,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:26:28,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:26:28,498 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 [2023-08-30 07:26:28,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:28,691 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:26:28,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:26:28,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1796786889, now seen corresponding path program 1 times [2023-08-30 07:26:28,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:26:28,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517099838] [2023-08-30 07:26:28,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:26:28,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:28,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:26:28,694 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:26:28,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 07:26:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:26:28,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 07:26:28,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:26:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:26:28,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:26:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:26:29,039 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:26:29,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517099838] [2023-08-30 07:26:29,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517099838] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:26:29,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:26:29,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:26:29,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21235360] [2023-08-30 07:26:29,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:26:29,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:26:29,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:26:29,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:26:29,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:26:29,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 400 [2023-08-30 07:26:29,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 101 transitions, 747 flow. Second operand has 12 states, 12 states have (on average 163.5) internal successors, (1962), 12 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:29,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:26:29,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 400 [2023-08-30 07:26:29,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:26:34,569 INFO L130 PetriNetUnfolder]: 28811/37807 cut-off events. [2023-08-30 07:26:34,570 INFO L131 PetriNetUnfolder]: For 38953/38995 co-relation queries the response was YES. [2023-08-30 07:26:34,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106477 conditions, 37807 events. 28811/37807 cut-off events. For 38953/38995 co-relation queries the response was YES. Maximal size of possible extension queue 1664. Compared 223951 event pairs, 7300 based on Foata normal form. 413/23006 useless extension candidates. Maximal degree in co-relation 106437. Up to 17496 conditions per place. [2023-08-30 07:26:34,897 INFO L137 encePairwiseOnDemand]: 389/400 looper letters, 161 selfloop transitions, 40 changer transitions 0/204 dead transitions. [2023-08-30 07:26:34,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 204 transitions, 1389 flow [2023-08-30 07:26:34,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 07:26:34,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 07:26:34,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2429 transitions. [2023-08-30 07:26:34,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43375 [2023-08-30 07:26:34,901 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2429 transitions. [2023-08-30 07:26:34,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2429 transitions. [2023-08-30 07:26:34,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:26:34,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2429 transitions. [2023-08-30 07:26:34,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 173.5) internal successors, (2429), 14 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:34,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 400.0) internal successors, (6000), 15 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:34,910 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 400.0) internal successors, (6000), 15 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:34,910 INFO L175 Difference]: Start difference. First operand has 105 places, 101 transitions, 747 flow. Second operand 14 states and 2429 transitions. [2023-08-30 07:26:34,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 204 transitions, 1389 flow [2023-08-30 07:26:35,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 204 transitions, 1339 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-30 07:26:35,122 INFO L231 Difference]: Finished difference. Result has 112 places, 95 transitions, 788 flow [2023-08-30 07:26:35,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=788, PETRI_PLACES=112, PETRI_TRANSITIONS=95} [2023-08-30 07:26:35,123 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 54 predicate places. [2023-08-30 07:26:35,123 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 95 transitions, 788 flow [2023-08-30 07:26:35,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.5) internal successors, (1962), 12 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:35,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:26:35,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:26:35,130 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 [2023-08-30 07:26:35,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:35,324 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:26:35,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:26:35,325 INFO L85 PathProgramCache]: Analyzing trace with hash 39721626, now seen corresponding path program 1 times [2023-08-30 07:26:35,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:26:35,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656867120] [2023-08-30 07:26:35,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:26:35,325 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:35,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:26:35,326 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:26:35,368 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 (18)] Waiting until timeout for monitored process [2023-08-30 07:26:35,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:26:35,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 07:26:35,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:26:35,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 07:26:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:26:35,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:26:35,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:26:35,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656867120] [2023-08-30 07:26:35,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656867120] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:26:35,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:26:35,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 07:26:35,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125248091] [2023-08-30 07:26:35,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:26:35,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:26:35,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:26:35,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:26:35,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:26:35,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 400 [2023-08-30 07:26:35,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 95 transitions, 788 flow. Second operand has 6 states, 6 states have (on average 166.66666666666666) internal successors, (1000), 6 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:35,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:26:35,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 400 [2023-08-30 07:26:35,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:26:40,542 INFO L130 PetriNetUnfolder]: 37222/49575 cut-off events. [2023-08-30 07:26:40,542 INFO L131 PetriNetUnfolder]: For 154831/157414 co-relation queries the response was YES. [2023-08-30 07:26:40,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156953 conditions, 49575 events. 37222/49575 cut-off events. For 154831/157414 co-relation queries the response was YES. Maximal size of possible extension queue 2179. Compared 311965 event pairs, 13910 based on Foata normal form. 2583/37600 useless extension candidates. Maximal degree in co-relation 156911. Up to 31913 conditions per place. [2023-08-30 07:26:41,215 INFO L137 encePairwiseOnDemand]: 395/400 looper letters, 98 selfloop transitions, 13 changer transitions 0/121 dead transitions. [2023-08-30 07:26:41,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 121 transitions, 1139 flow [2023-08-30 07:26:41,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:26:41,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:26:41,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 878 transitions. [2023-08-30 07:26:41,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.439 [2023-08-30 07:26:41,218 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 878 transitions. [2023-08-30 07:26:41,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 878 transitions. [2023-08-30 07:26:41,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:26:41,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 878 transitions. [2023-08-30 07:26:41,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 175.6) internal successors, (878), 5 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:41,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:41,222 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:41,222 INFO L175 Difference]: Start difference. First operand has 112 places, 95 transitions, 788 flow. Second operand 5 states and 878 transitions. [2023-08-30 07:26:41,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 121 transitions, 1139 flow [2023-08-30 07:26:41,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 121 transitions, 1097 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-30 07:26:41,412 INFO L231 Difference]: Finished difference. Result has 113 places, 96 transitions, 784 flow [2023-08-30 07:26:41,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=784, PETRI_PLACES=113, PETRI_TRANSITIONS=96} [2023-08-30 07:26:41,413 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 55 predicate places. [2023-08-30 07:26:41,413 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 96 transitions, 784 flow [2023-08-30 07:26:41,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 166.66666666666666) internal successors, (1000), 6 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:41,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:26:41,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:26:41,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 07:26:41,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:41,620 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:26:41,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:26:41,620 INFO L85 PathProgramCache]: Analyzing trace with hash -128035769, now seen corresponding path program 1 times [2023-08-30 07:26:41,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:26:41,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565323904] [2023-08-30 07:26:41,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:26:41,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:41,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:26:41,621 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:26:41,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 07:26:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:26:41,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:26:41,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:26:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:26:41,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:26:41,891 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 25 treesize of output 21 [2023-08-30 07:26:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:26:41,951 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:26:41,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565323904] [2023-08-30 07:26:41,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565323904] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:26:41,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:26:41,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 07:26:41,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765307130] [2023-08-30 07:26:41,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:26:41,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:26:41,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:26:41,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:26:41,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:26:43,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 400 [2023-08-30 07:26:43,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 96 transitions, 784 flow. Second operand has 10 states, 10 states have (on average 162.8) internal successors, (1628), 10 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:43,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:26:43,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 400 [2023-08-30 07:26:43,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:26:51,636 INFO L130 PetriNetUnfolder]: 56517/77092 cut-off events. [2023-08-30 07:26:51,636 INFO L131 PetriNetUnfolder]: For 281587/287932 co-relation queries the response was YES. [2023-08-30 07:26:52,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250410 conditions, 77092 events. 56517/77092 cut-off events. For 281587/287932 co-relation queries the response was YES. Maximal size of possible extension queue 3139. Compared 530524 event pairs, 18038 based on Foata normal form. 6345/64324 useless extension candidates. Maximal degree in co-relation 250367. Up to 33770 conditions per place. [2023-08-30 07:26:52,432 INFO L137 encePairwiseOnDemand]: 391/400 looper letters, 177 selfloop transitions, 35 changer transitions 0/221 dead transitions. [2023-08-30 07:26:52,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 221 transitions, 1713 flow [2023-08-30 07:26:52,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 07:26:52,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 07:26:52,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1928 transitions. [2023-08-30 07:26:52,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4381818181818182 [2023-08-30 07:26:52,435 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1928 transitions. [2023-08-30 07:26:52,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1928 transitions. [2023-08-30 07:26:52,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:26:52,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1928 transitions. [2023-08-30 07:26:52,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 175.27272727272728) internal successors, (1928), 11 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:52,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 400.0) internal successors, (4800), 12 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:52,440 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 400.0) internal successors, (4800), 12 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:52,440 INFO L175 Difference]: Start difference. First operand has 113 places, 96 transitions, 784 flow. Second operand 11 states and 1928 transitions. [2023-08-30 07:26:52,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 221 transitions, 1713 flow [2023-08-30 07:26:52,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 221 transitions, 1677 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 07:26:52,742 INFO L231 Difference]: Finished difference. Result has 125 places, 103 transitions, 898 flow [2023-08-30 07:26:52,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=898, PETRI_PLACES=125, PETRI_TRANSITIONS=103} [2023-08-30 07:26:52,742 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 67 predicate places. [2023-08-30 07:26:52,743 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 103 transitions, 898 flow [2023-08-30 07:26:52,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 162.8) internal successors, (1628), 10 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:52,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:26:52,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:26:52,753 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 (19)] Ended with exit code 0 [2023-08-30 07:26:52,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:52,954 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:26:52,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:26:52,954 INFO L85 PathProgramCache]: Analyzing trace with hash -128035771, now seen corresponding path program 1 times [2023-08-30 07:26:52,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:26:52,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113003051] [2023-08-30 07:26:52,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:26:52,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:52,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:26:52,955 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:26:52,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 07:26:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:26:53,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 07:26:53,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:26:53,199 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:26:53,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:26:53,303 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 07:26:53,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 07:26:53,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:26:53,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 07:26:53,412 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 07:26:53,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 07:26:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:26:53,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:26:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:26:59,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:26:59,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113003051] [2023-08-30 07:26:59,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113003051] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:26:59,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:26:59,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 07:26:59,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631293530] [2023-08-30 07:26:59,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:26:59,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:26:59,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:26:59,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:26:59,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:27:05,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 400 [2023-08-30 07:27:05,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 103 transitions, 898 flow. Second operand has 10 states, 10 states have (on average 150.0) internal successors, (1500), 10 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:05,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:27:05,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 400 [2023-08-30 07:27:05,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:27:19,229 INFO L130 PetriNetUnfolder]: 53477/72936 cut-off events. [2023-08-30 07:27:19,229 INFO L131 PetriNetUnfolder]: For 300318/306151 co-relation queries the response was YES. [2023-08-30 07:27:19,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255994 conditions, 72936 events. 53477/72936 cut-off events. For 300318/306151 co-relation queries the response was YES. Maximal size of possible extension queue 2954. Compared 493425 event pairs, 19004 based on Foata normal form. 6949/67129 useless extension candidates. Maximal degree in co-relation 255946. Up to 15925 conditions per place. [2023-08-30 07:27:20,159 INFO L137 encePairwiseOnDemand]: 388/400 looper letters, 349 selfloop transitions, 68 changer transitions 0/426 dead transitions. [2023-08-30 07:27:20,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 426 transitions, 3048 flow [2023-08-30 07:27:20,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 07:27:20,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 07:27:20,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3769 transitions. [2023-08-30 07:27:20,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096739130434783 [2023-08-30 07:27:20,164 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3769 transitions. [2023-08-30 07:27:20,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3769 transitions. [2023-08-30 07:27:20,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:27:20,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3769 transitions. [2023-08-30 07:27:20,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 163.8695652173913) internal successors, (3769), 23 states have internal predecessors, (3769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:20,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 400.0) internal successors, (9600), 24 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:20,176 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 400.0) internal successors, (9600), 24 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:20,176 INFO L175 Difference]: Start difference. First operand has 125 places, 103 transitions, 898 flow. Second operand 23 states and 3769 transitions. [2023-08-30 07:27:20,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 426 transitions, 3048 flow [2023-08-30 07:27:20,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 426 transitions, 3007 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-08-30 07:27:20,576 INFO L231 Difference]: Finished difference. Result has 153 places, 131 transitions, 1269 flow [2023-08-30 07:27:20,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1269, PETRI_PLACES=153, PETRI_TRANSITIONS=131} [2023-08-30 07:27:20,576 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 95 predicate places. [2023-08-30 07:27:20,576 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 131 transitions, 1269 flow [2023-08-30 07:27:20,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 150.0) internal successors, (1500), 10 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:20,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:27:20,577 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:27:20,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-08-30 07:27:20,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:20,777 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:27:20,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:27:20,778 INFO L85 PathProgramCache]: Analyzing trace with hash -691425590, now seen corresponding path program 2 times [2023-08-30 07:27:20,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:27:20,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408210596] [2023-08-30 07:27:20,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:27:20,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:20,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:27:20,779 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:27:20,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 07:27:21,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:27:21,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:27:21,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 07:27:21,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:27:21,140 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:27:21,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:27:21,210 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-08-30 07:27:21,210 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 21 treesize of output 21 [2023-08-30 07:27:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:27:21,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:27:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:27:21,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:27:21,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408210596] [2023-08-30 07:27:21,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408210596] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:27:21,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:27:21,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 07:27:21,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572967188] [2023-08-30 07:27:21,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:27:21,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 07:27:21,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:27:21,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 07:27:21,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-30 07:27:26,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 400 [2023-08-30 07:27:26,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 131 transitions, 1269 flow. Second operand has 14 states, 14 states have (on average 156.42857142857142) internal successors, (2190), 14 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:26,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:27:26,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 400 [2023-08-30 07:27:26,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:27:42,077 INFO L130 PetriNetUnfolder]: 81023/112074 cut-off events. [2023-08-30 07:27:42,078 INFO L131 PetriNetUnfolder]: For 445327/457021 co-relation queries the response was YES. [2023-08-30 07:27:43,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413503 conditions, 112074 events. 81023/112074 cut-off events. For 445327/457021 co-relation queries the response was YES. Maximal size of possible extension queue 4309. Compared 805526 event pairs, 23700 based on Foata normal form. 15566/107102 useless extension candidates. Maximal degree in co-relation 413447. Up to 46410 conditions per place. [2023-08-30 07:27:43,798 INFO L137 encePairwiseOnDemand]: 393/400 looper letters, 313 selfloop transitions, 31 changer transitions 0/352 dead transitions. [2023-08-30 07:27:43,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 352 transitions, 3099 flow [2023-08-30 07:27:43,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 07:27:43,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 07:27:43,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2239 transitions. [2023-08-30 07:27:43,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305769230769231 [2023-08-30 07:27:43,801 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2239 transitions. [2023-08-30 07:27:43,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2239 transitions. [2023-08-30 07:27:43,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:27:43,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2239 transitions. [2023-08-30 07:27:43,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 172.23076923076923) internal successors, (2239), 13 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:43,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 400.0) internal successors, (5600), 14 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:43,807 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 400.0) internal successors, (5600), 14 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:43,807 INFO L175 Difference]: Start difference. First operand has 153 places, 131 transitions, 1269 flow. Second operand 13 states and 2239 transitions. [2023-08-30 07:27:43,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 352 transitions, 3099 flow [2023-08-30 07:27:45,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 352 transitions, 2970 flow, removed 42 selfloop flow, removed 7 redundant places. [2023-08-30 07:27:45,344 INFO L231 Difference]: Finished difference. Result has 162 places, 134 transitions, 1325 flow [2023-08-30 07:27:45,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1188, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1325, PETRI_PLACES=162, PETRI_TRANSITIONS=134} [2023-08-30 07:27:45,344 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 104 predicate places. [2023-08-30 07:27:45,345 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 134 transitions, 1325 flow [2023-08-30 07:27:45,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 156.42857142857142) internal successors, (2190), 14 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:45,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:27:45,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:27:45,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-08-30 07:27:45,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:45,546 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:27:45,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:27:45,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1511699634, now seen corresponding path program 1 times [2023-08-30 07:27:45,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:27:45,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15499593] [2023-08-30 07:27:45,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:27:45,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:45,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:27:45,547 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:27:45,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 07:27:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:27:45,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 07:27:45,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:27:45,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 07:27:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:27:45,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:27:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:27:46,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:27:46,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15499593] [2023-08-30 07:27:46,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15499593] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:27:46,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:27:46,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 07:27:46,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557487517] [2023-08-30 07:27:46,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:27:46,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 07:27:46,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:27:46,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 07:27:46,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-30 07:27:49,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 400 [2023-08-30 07:27:49,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 134 transitions, 1325 flow. Second operand has 14 states, 14 states have (on average 164.71428571428572) internal successors, (2306), 14 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:49,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:27:49,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 400 [2023-08-30 07:27:49,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:28:26,116 INFO L130 PetriNetUnfolder]: 176949/243438 cut-off events. [2023-08-30 07:28:26,116 INFO L131 PetriNetUnfolder]: For 1288910/1312089 co-relation queries the response was YES. [2023-08-30 07:28:28,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 952961 conditions, 243438 events. 176949/243438 cut-off events. For 1288910/1312089 co-relation queries the response was YES. Maximal size of possible extension queue 7710. Compared 1819483 event pairs, 20103 based on Foata normal form. 33585/232493 useless extension candidates. Maximal degree in co-relation 952901. Up to 48224 conditions per place. [2023-08-30 07:28:29,594 INFO L137 encePairwiseOnDemand]: 391/400 looper letters, 257 selfloop transitions, 65 changer transitions 0/332 dead transitions. [2023-08-30 07:28:29,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 332 transitions, 3431 flow [2023-08-30 07:28:29,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 07:28:29,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 07:28:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1778 transitions. [2023-08-30 07:28:29,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4445 [2023-08-30 07:28:29,598 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1778 transitions. [2023-08-30 07:28:29,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1778 transitions. [2023-08-30 07:28:29,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:28:29,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1778 transitions. [2023-08-30 07:28:29,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 177.8) internal successors, (1778), 10 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:29,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 400.0) internal successors, (4400), 11 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:29,602 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 400.0) internal successors, (4400), 11 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:29,602 INFO L175 Difference]: Start difference. First operand has 162 places, 134 transitions, 1325 flow. Second operand 10 states and 1778 transitions. [2023-08-30 07:28:29,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 332 transitions, 3431 flow [2023-08-30 07:28:40,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 332 transitions, 3214 flow, removed 84 selfloop flow, removed 3 redundant places. [2023-08-30 07:28:40,260 INFO L231 Difference]: Finished difference. Result has 175 places, 166 transitions, 1873 flow [2023-08-30 07:28:40,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1873, PETRI_PLACES=175, PETRI_TRANSITIONS=166} [2023-08-30 07:28:40,261 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 117 predicate places. [2023-08-30 07:28:40,261 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 166 transitions, 1873 flow [2023-08-30 07:28:40,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 164.71428571428572) internal successors, (2306), 14 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:40,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:28:40,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:28:40,271 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 (22)] Forceful destruction successful, exit code 0 [2023-08-30 07:28:40,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:28:40,467 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:28:40,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:28:40,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1511699632, now seen corresponding path program 1 times [2023-08-30 07:28:40,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:28:40,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255671439] [2023-08-30 07:28:40,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:28:40,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:28:40,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:28:40,469 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:28:40,473 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 (23)] Waiting until timeout for monitored process [2023-08-30 07:28:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:28:40,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 07:28:40,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:28:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:28:40,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:28:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:28:40,774 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:28:40,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255671439] [2023-08-30 07:28:40,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255671439] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:28:40,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:28:40,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:28:40,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954235379] [2023-08-30 07:28:40,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:28:40,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:28:40,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:28:40,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:28:40,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:28:41,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 400 [2023-08-30 07:28:41,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 166 transitions, 1873 flow. Second operand has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:41,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:28:41,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 400 [2023-08-30 07:28:41,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:29:13,797 INFO L130 PetriNetUnfolder]: 168275/231518 cut-off events. [2023-08-30 07:29:13,797 INFO L131 PetriNetUnfolder]: For 1239144/1260905 co-relation queries the response was YES. [2023-08-30 07:29:16,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 998285 conditions, 231518 events. 168275/231518 cut-off events. For 1239144/1260905 co-relation queries the response was YES. Maximal size of possible extension queue 7465. Compared 1736646 event pairs, 89820 based on Foata normal form. 22391/211787 useless extension candidates. Maximal degree in co-relation 998218. Up to 168158 conditions per place. [2023-08-30 07:29:18,015 INFO L137 encePairwiseOnDemand]: 388/400 looper letters, 216 selfloop transitions, 42 changer transitions 0/268 dead transitions. [2023-08-30 07:29:18,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 268 transitions, 2733 flow [2023-08-30 07:29:18,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 07:29:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 07:29:18,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2418 transitions. [2023-08-30 07:29:18,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317857142857143 [2023-08-30 07:29:18,018 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2418 transitions. [2023-08-30 07:29:18,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2418 transitions. [2023-08-30 07:29:18,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:29:18,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2418 transitions. [2023-08-30 07:29:18,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 172.71428571428572) internal successors, (2418), 14 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:18,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 400.0) internal successors, (6000), 15 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:18,023 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 400.0) internal successors, (6000), 15 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:18,023 INFO L175 Difference]: Start difference. First operand has 175 places, 166 transitions, 1873 flow. Second operand 14 states and 2418 transitions. [2023-08-30 07:29:18,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 268 transitions, 2733 flow [2023-08-30 07:29:30,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 268 transitions, 2694 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 07:29:30,469 INFO L231 Difference]: Finished difference. Result has 183 places, 150 transitions, 1724 flow [2023-08-30 07:29:30,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1724, PETRI_PLACES=183, PETRI_TRANSITIONS=150} [2023-08-30 07:29:30,469 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 125 predicate places. [2023-08-30 07:29:30,470 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 150 transitions, 1724 flow [2023-08-30 07:29:30,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:30,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:29:30,470 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 07:29:30,480 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 (23)] Forceful destruction successful, exit code 0 [2023-08-30 07:29:30,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:29:30,673 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:29:30,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:29:30,673 INFO L85 PathProgramCache]: Analyzing trace with hash 40648664, now seen corresponding path program 3 times [2023-08-30 07:29:30,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:29:30,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573545482] [2023-08-30 07:29:30,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:29:30,674 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:29:30,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:29:30,675 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:29:30,677 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 (24)] Waiting until timeout for monitored process [2023-08-30 07:29:30,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 07:29:30,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:29:30,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 07:29:30,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:29:30,889 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:29:30,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:29:30,961 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-08-30 07:29:30,962 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 21 treesize of output 21 [2023-08-30 07:29:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:29:31,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:29:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:29:31,927 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:29:31,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573545482] [2023-08-30 07:29:31,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573545482] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:29:31,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:29:31,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-30 07:29:31,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885559512] [2023-08-30 07:29:31,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:29:31,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 07:29:31,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:29:31,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 07:29:31,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-08-30 07:29:38,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 400 [2023-08-30 07:29:38,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 150 transitions, 1724 flow. Second operand has 16 states, 16 states have (on average 155.375) internal successors, (2486), 16 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:38,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:29:38,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 400 [2023-08-30 07:29:38,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:30:31,678 INFO L130 PetriNetUnfolder]: 228536/304649 cut-off events. [2023-08-30 07:30:31,678 INFO L131 PetriNetUnfolder]: For 2065925/2097667 co-relation queries the response was YES. [2023-08-30 07:30:35,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1442641 conditions, 304649 events. 228536/304649 cut-off events. For 2065925/2097667 co-relation queries the response was YES. Maximal size of possible extension queue 8390. Compared 2194664 event pairs, 31961 based on Foata normal form. 65628/320093 useless extension candidates. Maximal degree in co-relation 1442574. Up to 81680 conditions per place. [2023-08-30 07:30:36,928 INFO L137 encePairwiseOnDemand]: 392/400 looper letters, 647 selfloop transitions, 44 changer transitions 2/701 dead transitions. [2023-08-30 07:30:36,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 701 transitions, 7883 flow [2023-08-30 07:30:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 07:30:36,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 07:30:36,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4027 transitions. [2023-08-30 07:30:36,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4194791666666667 [2023-08-30 07:30:36,933 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4027 transitions. [2023-08-30 07:30:36,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4027 transitions. [2023-08-30 07:30:36,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:30:36,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4027 transitions. [2023-08-30 07:30:36,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 167.79166666666666) internal successors, (4027), 24 states have internal predecessors, (4027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:36,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 400.0) internal successors, (10000), 25 states have internal predecessors, (10000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:36,942 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 400.0) internal successors, (10000), 25 states have internal predecessors, (10000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:36,942 INFO L175 Difference]: Start difference. First operand has 183 places, 150 transitions, 1724 flow. Second operand 24 states and 4027 transitions. [2023-08-30 07:30:36,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 701 transitions, 7883 flow [2023-08-30 07:31:28,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 701 transitions, 7745 flow, removed 37 selfloop flow, removed 6 redundant places. [2023-08-30 07:31:28,113 INFO L231 Difference]: Finished difference. Result has 204 places, 158 transitions, 1848 flow [2023-08-30 07:31:28,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1848, PETRI_PLACES=204, PETRI_TRANSITIONS=158} [2023-08-30 07:31:28,114 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 146 predicate places. [2023-08-30 07:31:28,114 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 158 transitions, 1848 flow [2023-08-30 07:31:28,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 155.375) internal successors, (2486), 16 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:28,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:31:28,115 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 07:31:28,123 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 (24)] Forceful destruction successful, exit code 0 [2023-08-30 07:31:28,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:31:28,315 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 07:31:28,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:31:28,316 INFO L85 PathProgramCache]: Analyzing trace with hash -339138785, now seen corresponding path program 3 times [2023-08-30 07:31:28,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:31:28,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441832768] [2023-08-30 07:31:28,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:31:28,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:31:28,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:31:28,318 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:31:28,319 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 (25)] Waiting until timeout for monitored process [2023-08-30 07:31:28,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 07:31:28,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:31:28,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:31:28,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:31:28,566 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:31:28,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:31:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:31:28,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:31:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:31:30,841 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:31:30,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441832768] [2023-08-30 07:31:30,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441832768] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:31:30,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:31:30,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 07:31:30,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608273568] [2023-08-30 07:31:30,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:31:30,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 07:31:30,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:31:30,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 07:31:30,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 07:31:46,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 400 [2023-08-30 07:31:46,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 158 transitions, 1848 flow. Second operand has 24 states, 24 states have (on average 162.0) internal successors, (3888), 24 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:46,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:31:46,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 400 [2023-08-30 07:31:46,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:31:56,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:31:58,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:00,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:01,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:03,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:05,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:07,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:09,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:11,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:13,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:16,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:18,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:21,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:22,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:25,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:26,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:29,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:30,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:34,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:36,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:38,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:41,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []