./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-simple-queue.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 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 01:04:25,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:04:25,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:04:25,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:04:25,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:04:25,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:04:25,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:04:25,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:04:25,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:04:25,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:04:25,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:04:25,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:04:25,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:04:25,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:04:25,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:04:25,137 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:04:25,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:04:25,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:04:25,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:04:25,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:04:25,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:04:25,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:04:25,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:04:25,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:04:25,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:04:25,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:04:25,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:04:25,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:04:25,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:04:25,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:04:25,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:04:25,176 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:04:25,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:04:25,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:04:25,179 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:04:25,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:04:25,180 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:04:25,180 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:04:25,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:04:25,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:04:25,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:04:25,183 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 01:04:25,216 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:04:25,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:04:25,218 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:04:25,218 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:04:25,219 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:04:25,219 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:04:25,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:04:25,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:04:25,220 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:04:25,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:04:25,221 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:04:25,221 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:04:25,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:04:25,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:04:25,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:04:25,222 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:04:25,222 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:04:25,222 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:04:25,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:04:25,223 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:04:25,223 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:04:25,223 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:04:25,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:04:25,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:04:25,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:04:25,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:04:25,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:04:25,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:04:25,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 01:04:25,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 01:04:25,225 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:04:25,225 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:04:25,225 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:04:25,226 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:04:25,226 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:04:25,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:04:25,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:04:25,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:04:25,596 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:04:25,596 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:04:25,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-08-30 01:04:26,839 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:04:27,073 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:04:27,074 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-08-30 01:04:27,084 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f680b186/66fbc12e73684aca9017feecf8dd046d/FLAG188ff4253 [2023-08-30 01:04:27,103 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f680b186/66fbc12e73684aca9017feecf8dd046d [2023-08-30 01:04:27,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:04:27,107 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:04:27,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:04:27,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:04:27,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:04:27,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:04:27" (1/1) ... [2023-08-30 01:04:27,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@771df0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:04:27, skipping insertion in model container [2023-08-30 01:04:27,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:04:27" (1/1) ... [2023-08-30 01:04:27,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:04:27,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:04:27,312 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-queue.wvr.c[2438,2451] [2023-08-30 01:04:27,321 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:04:27,330 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 01:04:27,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6870dc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:04:27, skipping insertion in model container [2023-08-30 01:04:27,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:04:27,332 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 01:04:27,333 INFO L158 Benchmark]: Toolchain (without parser) took 225.40ms. Allocated memory is still 75.5MB. Free memory was 53.1MB in the beginning and 43.6MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 01:04:27,334 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 58.7MB. Free memory was 36.3MB in the beginning and 36.2MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 01:04:27,334 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.35ms. Allocated memory is still 75.5MB. Free memory was 53.0MB in the beginning and 43.6MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 01:04:27,335 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 58.7MB. Free memory was 36.3MB in the beginning and 36.2MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 222.35ms. Allocated memory is still 75.5MB. Free memory was 53.0MB in the beginning and 43.6MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 95]: 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-queue.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 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 01:04:29,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:04:29,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:04:29,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:04:29,043 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:04:29,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:04:29,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:04:29,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:04:29,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:04:29,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:04:29,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:04:29,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:04:29,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:04:29,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:04:29,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:04:29,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:04:29,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:04:29,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:04:29,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:04:29,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:04:29,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:04:29,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:04:29,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:04:29,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:04:29,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:04:29,086 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:04:29,086 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:04:29,088 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:04:29,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:04:29,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:04:29,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:04:29,096 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:04:29,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:04:29,100 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:04:29,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:04:29,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:04:29,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:04:29,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:04:29,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:04:29,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:04:29,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:04:29,115 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 01:04:29,154 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:04:29,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:04:29,156 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:04:29,156 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:04:29,157 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:04:29,157 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:04:29,158 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:04:29,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:04:29,158 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:04:29,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:04:29,159 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:04:29,159 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:04:29,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:04:29,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:04:29,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:04:29,160 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:04:29,160 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:04:29,160 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:04:29,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:04:29,161 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:04:29,161 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 01:04:29,161 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 01:04:29,161 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:04:29,161 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:04:29,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:04:29,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:04:29,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:04:29,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:04:29,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:04:29,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:04:29,163 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 01:04:29,163 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 01:04:29,163 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:04:29,164 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:04:29,164 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:04:29,164 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 01:04:29,164 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:04:29,164 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:04:29,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:04:29,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:04:29,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:04:29,483 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:04:29,483 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:04:29,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-08-30 01:04:30,674 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:04:30,911 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:04:30,911 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-08-30 01:04:30,918 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42c706527/91487ad4eb7941319ed8a0b75fa910f1/FLAG9ae828c77 [2023-08-30 01:04:30,930 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42c706527/91487ad4eb7941319ed8a0b75fa910f1 [2023-08-30 01:04:30,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:04:30,933 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:04:30,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:04:30,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:04:30,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:04:30,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:04:30" (1/1) ... [2023-08-30 01:04:30,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c30b56c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:04:30, skipping insertion in model container [2023-08-30 01:04:30,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:04:30" (1/1) ... [2023-08-30 01:04:30,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:04:30,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:04:31,154 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-queue.wvr.c[2438,2451] [2023-08-30 01:04:31,165 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:04:31,181 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 01:04:31,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:04:31,204 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-queue.wvr.c[2438,2451] [2023-08-30 01:04:31,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:04:31,212 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 01:04:31,237 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-queue.wvr.c[2438,2451] [2023-08-30 01:04:31,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:04:31,257 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 01:04:31,257 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 01:04:31,263 INFO L208 MainTranslator]: Completed translation [2023-08-30 01:04:31,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:04:31 WrapperNode [2023-08-30 01:04:31,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:04:31,266 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 01:04:31,266 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 01:04:31,266 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 01:04:31,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:04:31" (1/1) ... [2023-08-30 01:04:31,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:04:31" (1/1) ... [2023-08-30 01:04:31,321 INFO L138 Inliner]: procedures = 26, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 130 [2023-08-30 01:04:31,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 01:04:31,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 01:04:31,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 01:04:31,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 01:04:31,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:04:31" (1/1) ... [2023-08-30 01:04:31,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:04:31" (1/1) ... [2023-08-30 01:04:31,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:04:31" (1/1) ... [2023-08-30 01:04:31,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:04:31" (1/1) ... [2023-08-30 01:04:31,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:04:31" (1/1) ... [2023-08-30 01:04:31,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:04:31" (1/1) ... [2023-08-30 01:04:31,365 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:04:31" (1/1) ... [2023-08-30 01:04:31,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:04:31" (1/1) ... [2023-08-30 01:04:31,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 01:04:31,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 01:04:31,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 01:04:31,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 01:04:31,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:04:31" (1/1) ... [2023-08-30 01:04:31,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:04:31,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:04:31,410 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 01:04:31,422 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 01:04:31,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 01:04:31,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 01:04:31,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 01:04:31,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 01:04:31,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 01:04:31,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 01:04:31,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 01:04:31,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 01:04:31,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 01:04:31,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 01:04:31,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 01:04:31,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 01:04:31,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 01:04:31,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 01:04:31,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 01:04:31,450 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 01:04:31,614 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 01:04:31,615 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 01:04:31,988 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 01:04:32,093 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 01:04:32,098 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 01:04:32,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:04:32 BoogieIcfgContainer [2023-08-30 01:04:32,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 01:04:32,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 01:04:32,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 01:04:32,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 01:04:32,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 01:04:30" (1/3) ... [2023-08-30 01:04:32,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70213739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:04:32, skipping insertion in model container [2023-08-30 01:04:32,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:04:31" (2/3) ... [2023-08-30 01:04:32,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70213739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:04:32, skipping insertion in model container [2023-08-30 01:04:32,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:04:32" (3/3) ... [2023-08-30 01:04:32,109 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2023-08-30 01:04:32,125 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 01:04:32,125 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-30 01:04:32,125 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 01:04:32,192 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 01:04:32,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 130 transitions, 276 flow [2023-08-30 01:04:32,323 INFO L130 PetriNetUnfolder]: 9/128 cut-off events. [2023-08-30 01:04:32,324 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:04:32,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 128 events. 9/128 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 121 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-08-30 01:04:32,329 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 130 transitions, 276 flow [2023-08-30 01:04:32,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 124 transitions, 260 flow [2023-08-30 01:04:32,340 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 01:04:32,351 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 124 transitions, 260 flow [2023-08-30 01:04:32,359 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 124 transitions, 260 flow [2023-08-30 01:04:32,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 124 transitions, 260 flow [2023-08-30 01:04:32,380 INFO L130 PetriNetUnfolder]: 9/124 cut-off events. [2023-08-30 01:04:32,380 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:04:32,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 124 events. 9/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 120 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-08-30 01:04:32,382 INFO L119 LiptonReduction]: Number of co-enabled transitions 748 [2023-08-30 01:04:43,786 INFO L134 LiptonReduction]: Checked pairs total: 988 [2023-08-30 01:04:43,787 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-08-30 01:04:43,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 01:04:43,807 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;@3318bf52, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 01:04:43,807 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-30 01:04:43,810 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 01:04:43,810 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 01:04:43,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:04:43,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:04:43,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:04:43,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:04:43,819 INFO L85 PathProgramCache]: Analyzing trace with hash 18032, now seen corresponding path program 1 times [2023-08-30 01:04:43,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:04:43,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532253543] [2023-08-30 01:04:43,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:04:43,830 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 01:04:43,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:04:43,833 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 01:04:43,834 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 01:04:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:04:43,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:04:43,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:04:44,106 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:04:44,107 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:04:44,147 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 01:04:44,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:04:44,148 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:04:44,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532253543] [2023-08-30 01:04:44,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532253543] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:04:44,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:04:44,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:04:44,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496006983] [2023-08-30 01:04:44,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:04:44,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:04:44,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:04:44,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:04:44,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:04:44,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 268 [2023-08-30 01:04:44,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states 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 01:04:44,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:04:44,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 268 [2023-08-30 01:04:44,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:04:44,600 INFO L130 PetriNetUnfolder]: 291/498 cut-off events. [2023-08-30 01:04:44,600 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 01:04:44,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1030 conditions, 498 events. 291/498 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 2042 event pairs, 210 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 424. Up to 251 conditions per place. [2023-08-30 01:04:44,605 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 54 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-30 01:04:44,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 248 flow [2023-08-30 01:04:44,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:04:44,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:04:44,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2023-08-30 01:04:44,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.472636815920398 [2023-08-30 01:04:44,620 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2023-08-30 01:04:44,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2023-08-30 01:04:44,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:04:44,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2023-08-30 01:04:44,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states 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 01:04:44,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 01:04:44,632 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 01:04:44,634 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 72 flow. Second operand 3 states and 380 transitions. [2023-08-30 01:04:44,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 248 flow [2023-08-30 01:04:44,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 56 transitions, 232 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 01:04:44,639 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 74 flow [2023-08-30 01:04:44,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-08-30 01:04:44,644 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2023-08-30 01:04:44,644 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 74 flow [2023-08-30 01:04:44,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states 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 01:04:44,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:04:44,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:04:44,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 01:04:44,855 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 01:04:44,855 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:04:44,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:04:44,856 INFO L85 PathProgramCache]: Analyzing trace with hash 18070, now seen corresponding path program 1 times [2023-08-30 01:04:44,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:04:44,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743201495] [2023-08-30 01:04:44,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:04:44,857 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 01:04:44,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:04:44,858 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 01:04:44,864 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 01:04:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:04:44,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:04:44,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:04:44,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:04:44,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:04:44,969 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 01:04:44,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 01:04:44,988 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 10 treesize of output 8 [2023-08-30 01:04:45,022 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 01:04:45,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:04:45,022 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:04:45,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743201495] [2023-08-30 01:04:45,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743201495] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:04:45,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:04:45,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:04:45,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773360287] [2023-08-30 01:04:45,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:04:45,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:04:45,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:04:45,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:04:45,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:04:45,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 268 [2023-08-30 01:04:45,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states 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 01:04:45,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:04:45,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 268 [2023-08-30 01:04:45,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:04:45,308 INFO L130 PetriNetUnfolder]: 227/400 cut-off events. [2023-08-30 01:04:45,308 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 01:04:45,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 819 conditions, 400 events. 227/400 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1571 event pairs, 162 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 407. Up to 400 conditions per place. [2023-08-30 01:04:45,311 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 27 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-30 01:04:45,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 28 transitions, 126 flow [2023-08-30 01:04:45,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:04:45,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:04:45,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2023-08-30 01:04:45,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43532338308457713 [2023-08-30 01:04:45,315 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2023-08-30 01:04:45,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2023-08-30 01:04:45,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:04:45,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2023-08-30 01:04:45,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 01:04:45,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 01:04:45,319 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 01:04:45,319 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 74 flow. Second operand 3 states and 350 transitions. [2023-08-30 01:04:45,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 28 transitions, 126 flow [2023-08-30 01:04:45,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 28 transitions, 124 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:04:45,321 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 70 flow [2023-08-30 01:04:45,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2023-08-30 01:04:45,322 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2023-08-30 01:04:45,322 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 70 flow [2023-08-30 01:04:45,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states 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 01:04:45,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:04:45,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:04:45,336 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 01:04:45,533 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 01:04:45,534 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:04:45,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:04:45,534 INFO L85 PathProgramCache]: Analyzing trace with hash 18069, now seen corresponding path program 1 times [2023-08-30 01:04:45,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:04:45,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453577624] [2023-08-30 01:04:45,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:04:45,535 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 01:04:45,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:04:45,536 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 01:04:45,539 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 01:04:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:04:45,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:04:45,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:04:45,631 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 01:04:45,632 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 22 treesize of output 29 [2023-08-30 01:04:45,657 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 01:04:45,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:04:45,658 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:04:45,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453577624] [2023-08-30 01:04:45,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453577624] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:04:45,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:04:45,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:04:45,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179582563] [2023-08-30 01:04:45,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:04:45,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:04:45,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:04:45,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:04:45,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:04:45,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 268 [2023-08-30 01:04:45,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states 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 01:04:45,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:04:45,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 268 [2023-08-30 01:04:45,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:04:45,910 INFO L130 PetriNetUnfolder]: 163/302 cut-off events. [2023-08-30 01:04:45,910 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 01:04:45,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 302 events. 163/302 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1131 event pairs, 114 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 615. Up to 302 conditions per place. [2023-08-30 01:04:45,912 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 25 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-30 01:04:45,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 118 flow [2023-08-30 01:04:45,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:04:45,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:04:45,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2023-08-30 01:04:45,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43283582089552236 [2023-08-30 01:04:45,914 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2023-08-30 01:04:45,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2023-08-30 01:04:45,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:04:45,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2023-08-30 01:04:45,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states 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 01:04:45,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 01:04:45,920 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 01:04:45,924 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 70 flow. Second operand 3 states and 348 transitions. [2023-08-30 01:04:45,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 26 transitions, 118 flow [2023-08-30 01:04:45,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 26 transitions, 117 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:04:45,925 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 67 flow [2023-08-30 01:04:45,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2023-08-30 01:04:45,926 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -4 predicate places. [2023-08-30 01:04:45,926 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 67 flow [2023-08-30 01:04:45,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states 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 01:04:45,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:04:45,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:04:45,943 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 01:04:46,136 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 01:04:46,137 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:04:46,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:04:46,138 INFO L85 PathProgramCache]: Analyzing trace with hash 18031, now seen corresponding path program 1 times [2023-08-30 01:04:46,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:04:46,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540130780] [2023-08-30 01:04:46,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:04:46,138 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:04:46,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:04:46,139 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 01:04:46,140 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 01:04:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:04:46,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 01:04:46,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:04:46,221 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 01:04:46,222 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 01:04:46,239 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 01:04:46,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:04:46,240 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:04:46,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540130780] [2023-08-30 01:04:46,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540130780] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:04:46,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:04:46,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:04:46,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435921899] [2023-08-30 01:04:46,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:04:46,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:04:46,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:04:46,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:04:46,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:04:46,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 268 [2023-08-30 01:04:46,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states 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 01:04:46,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:04:46,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 268 [2023-08-30 01:04:46,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:04:46,438 INFO L130 PetriNetUnfolder]: 163/300 cut-off events. [2023-08-30 01:04:46,438 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 01:04:46,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 300 events. 163/300 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1122 event pairs, 114 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 611. Up to 300 conditions per place. [2023-08-30 01:04:46,442 INFO L137 encePairwiseOnDemand]: 266/268 looper letters, 24 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-30 01:04:46,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 115 flow [2023-08-30 01:04:46,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:04:46,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:04:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2023-08-30 01:04:46,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43034825870646765 [2023-08-30 01:04:46,445 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2023-08-30 01:04:46,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2023-08-30 01:04:46,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:04:46,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2023-08-30 01:04:46,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states 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 01:04:46,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 01:04:46,448 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 01:04:46,449 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 67 flow. Second operand 3 states and 346 transitions. [2023-08-30 01:04:46,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 115 flow [2023-08-30 01:04:46,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 114 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:04:46,450 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 66 flow [2023-08-30 01:04:46,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-08-30 01:04:46,452 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -4 predicate places. [2023-08-30 01:04:46,452 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 66 flow [2023-08-30 01:04:46,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states 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 01:04:46,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:04:46,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:04:46,469 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 01:04:46,667 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 01:04:46,667 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:04:46,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:04:46,668 INFO L85 PathProgramCache]: Analyzing trace with hash 560749, now seen corresponding path program 1 times [2023-08-30 01:04:46,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:04:46,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206904872] [2023-08-30 01:04:46,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:04:46,669 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 01:04:46,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:04:46,670 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 01:04:46,673 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 01:04:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:04:46,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 01:04:46,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:04:46,813 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:04:46,813 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:04:46,870 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 01:04:46,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:04:47,058 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 01:04:47,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:04:47,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206904872] [2023-08-30 01:04:47,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206904872] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:04:47,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:04:47,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 01:04:47,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492493190] [2023-08-30 01:04:47,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:04:47,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 01:04:47,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:04:47,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 01:04:47,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:04:47,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-08-30 01:04:47,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 66 flow. Second operand has 6 states, 6 states have (on average 103.0) internal successors, (618), 6 states have internal predecessors, (618), 0 states have call successors, (0), 0 states 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 01:04:47,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:04:47,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-08-30 01:04:47,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:04:48,019 INFO L130 PetriNetUnfolder]: 246/453 cut-off events. [2023-08-30 01:04:48,020 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 01:04:48,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 453 events. 246/453 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1899 event pairs, 171 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 925. Up to 151 conditions per place. [2023-08-30 01:04:48,022 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 65 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2023-08-30 01:04:48,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 72 transitions, 318 flow [2023-08-30 01:04:48,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 01:04:48,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 01:04:48,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 687 transitions. [2023-08-30 01:04:48,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42723880597014924 [2023-08-30 01:04:48,025 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 687 transitions. [2023-08-30 01:04:48,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 687 transitions. [2023-08-30 01:04:48,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:04:48,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 687 transitions. [2023-08-30 01:04:48,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 114.5) internal successors, (687), 6 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:48,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 268.0) internal successors, (1876), 7 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states 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 01:04:48,031 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 268.0) internal successors, (1876), 7 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states 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 01:04:48,031 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 66 flow. Second operand 6 states and 687 transitions. [2023-08-30 01:04:48,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 72 transitions, 318 flow [2023-08-30 01:04:48,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 72 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:04:48,033 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 119 flow [2023-08-30 01:04:48,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=119, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2023-08-30 01:04:48,034 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-08-30 01:04:48,034 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 119 flow [2023-08-30 01:04:48,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 103.0) internal successors, (618), 6 states have internal predecessors, (618), 0 states have call successors, (0), 0 states 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 01:04:48,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:04:48,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 01:04:48,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-08-30 01:04:48,243 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 01:04:48,243 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:04:48,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:04:48,244 INFO L85 PathProgramCache]: Analyzing trace with hash 17376030, now seen corresponding path program 1 times [2023-08-30 01:04:48,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:04:48,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078073565] [2023-08-30 01:04:48,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:04:48,245 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 01:04:48,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:04:48,246 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 01:04:48,247 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 01:04:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:04:48,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 01:04:48,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:04:48,326 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 01:04:48,326 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 2 case distinctions, treesize of input 12 treesize of output 22 [2023-08-30 01:04:48,347 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 01:04:48,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:04:48,347 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:04:48,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078073565] [2023-08-30 01:04:48,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078073565] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:04:48,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:04:48,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:04:48,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925213078] [2023-08-30 01:04:48,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:04:48,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:04:48,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:04:48,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:04:48,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:04:48,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 268 [2023-08-30 01:04:48,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 01:04:48,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:04:48,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 268 [2023-08-30 01:04:48,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:04:48,506 INFO L130 PetriNetUnfolder]: 222/405 cut-off events. [2023-08-30 01:04:48,506 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 01:04:48,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 405 events. 222/405 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1636 event pairs, 153 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 850. Up to 405 conditions per place. [2023-08-30 01:04:48,509 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 27 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-30 01:04:48,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 28 transitions, 171 flow [2023-08-30 01:04:48,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:04:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:04:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 336 transitions. [2023-08-30 01:04:48,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.417910447761194 [2023-08-30 01:04:48,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 336 transitions. [2023-08-30 01:04:48,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 336 transitions. [2023-08-30 01:04:48,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:04:48,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 336 transitions. [2023-08-30 01:04:48,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 01:04:48,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 01:04:48,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 01:04:48,513 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 119 flow. Second operand 3 states and 336 transitions. [2023-08-30 01:04:48,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 28 transitions, 171 flow [2023-08-30 01:04:48,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 28 transitions, 161 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 01:04:48,523 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 107 flow [2023-08-30 01:04:48,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2023-08-30 01:04:48,524 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-30 01:04:48,524 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 107 flow [2023-08-30 01:04:48,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 01:04:48,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:04:48,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 01:04:48,541 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 01:04:48,733 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 01:04:48,733 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:04:48,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:04:48,734 INFO L85 PathProgramCache]: Analyzing trace with hash 17376032, now seen corresponding path program 1 times [2023-08-30 01:04:48,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:04:48,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616123277] [2023-08-30 01:04:48,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:04:48,734 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 01:04:48,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:04:48,736 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 01:04:48,739 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 01:04:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:04:48,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:04:48,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:04:48,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:04:48,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:04:48,829 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 01:04:48,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 01:04:48,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 01:04:48,856 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 01:04:48,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:04:48,857 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:04:48,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616123277] [2023-08-30 01:04:48,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616123277] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:04:48,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:04:48,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:04:48,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030342565] [2023-08-30 01:04:48,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:04:48,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:04:48,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:04:48,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:04:48,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:04:48,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 268 [2023-08-30 01:04:48,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 01:04:48,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:04:48,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 268 [2023-08-30 01:04:48,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:04:49,027 INFO L130 PetriNetUnfolder]: 198/357 cut-off events. [2023-08-30 01:04:49,028 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 01:04:49,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 357 events. 198/357 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1366 event pairs, 135 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 750. Up to 357 conditions per place. [2023-08-30 01:04:49,030 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 25 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-30 01:04:49,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 155 flow [2023-08-30 01:04:49,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:04:49,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:04:49,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 343 transitions. [2023-08-30 01:04:49,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42661691542288555 [2023-08-30 01:04:49,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 343 transitions. [2023-08-30 01:04:49,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 343 transitions. [2023-08-30 01:04:49,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:04:49,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 343 transitions. [2023-08-30 01:04:49,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states 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 01:04:49,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 01:04:49,035 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 01:04:49,035 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 107 flow. Second operand 3 states and 343 transitions. [2023-08-30 01:04:49,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 155 flow [2023-08-30 01:04:49,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 26 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:04:49,036 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 104 flow [2023-08-30 01:04:49,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-08-30 01:04:49,037 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-08-30 01:04:49,037 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 104 flow [2023-08-30 01:04:49,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 01:04:49,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:04:49,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 01:04:49,051 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 01:04:49,246 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 01:04:49,247 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:04:49,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:04:49,247 INFO L85 PathProgramCache]: Analyzing trace with hash 17376018, now seen corresponding path program 1 times [2023-08-30 01:04:49,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:04:49,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794652782] [2023-08-30 01:04:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:04:49,248 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:04:49,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:04:49,249 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 01:04:49,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 01:04:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:04:49,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 01:04:49,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:04:49,359 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 01:04:49,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:04:49,359 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:04:49,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794652782] [2023-08-30 01:04:49,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794652782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:04:49,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:04:49,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:04:49,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413505407] [2023-08-30 01:04:49,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:04:49,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:04:49,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:04:49,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:04:49,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:04:49,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 268 [2023-08-30 01:04:49,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states 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 01:04:49,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:04:49,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 268 [2023-08-30 01:04:49,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:04:49,594 INFO L130 PetriNetUnfolder]: 142/269 cut-off events. [2023-08-30 01:04:49,594 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 01:04:49,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 269 events. 142/269 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 976 event pairs, 99 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 572. Up to 241 conditions per place. [2023-08-30 01:04:49,595 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 34 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2023-08-30 01:04:49,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 208 flow [2023-08-30 01:04:49,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:04:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:04:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 466 transitions. [2023-08-30 01:04:49,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43470149253731344 [2023-08-30 01:04:49,598 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 466 transitions. [2023-08-30 01:04:49,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 466 transitions. [2023-08-30 01:04:49,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:04:49,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 466 transitions. [2023-08-30 01:04:49,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states 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 01:04:49,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states 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 01:04:49,601 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states 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 01:04:49,601 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 104 flow. Second operand 4 states and 466 transitions. [2023-08-30 01:04:49,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 208 flow [2023-08-30 01:04:49,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 207 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:04:49,603 INFO L231 Difference]: Finished difference. Result has 40 places, 27 transitions, 133 flow [2023-08-30 01:04:49,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=133, PETRI_PLACES=40, PETRI_TRANSITIONS=27} [2023-08-30 01:04:49,603 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2023-08-30 01:04:49,603 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 27 transitions, 133 flow [2023-08-30 01:04:49,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states 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 01:04:49,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:04:49,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:04:49,615 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 01:04:49,812 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 01:04:49,813 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:04:49,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:04:49,813 INFO L85 PathProgramCache]: Analyzing trace with hash 538927055, now seen corresponding path program 1 times [2023-08-30 01:04:49,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:04:49,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723836098] [2023-08-30 01:04:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:04:49,813 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 01:04:49,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:04:49,815 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 01:04:49,815 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 01:04:49,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:04:49,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 01:04:49,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:04:49,934 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:04:49,935 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:04:50,050 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 01:04:50,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:04:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:04:50,703 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:04:50,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723836098] [2023-08-30 01:04:50,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723836098] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:04:50,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:04:50,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 01:04:50,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36659312] [2023-08-30 01:04:50,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:04:50,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:04:50,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:04:50,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:04:50,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:04:52,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 268 [2023-08-30 01:04:52,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 27 transitions, 133 flow. Second operand has 8 states, 8 states have (on average 99.25) internal successors, (794), 8 states have internal predecessors, (794), 0 states have call successors, (0), 0 states 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 01:04:52,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:04:52,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 268 [2023-08-30 01:04:52,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:04:54,847 INFO L130 PetriNetUnfolder]: 156/298 cut-off events. [2023-08-30 01:04:54,848 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 01:04:54,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 298 events. 156/298 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1045 event pairs, 102 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 763. Up to 125 conditions per place. [2023-08-30 01:04:54,849 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 55 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2023-08-30 01:04:54,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 377 flow [2023-08-30 01:04:54,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 01:04:54,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 01:04:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1050 transitions. [2023-08-30 01:04:54,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917910447761194 [2023-08-30 01:04:54,854 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1050 transitions. [2023-08-30 01:04:54,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1050 transitions. [2023-08-30 01:04:54,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:04:54,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1050 transitions. [2023-08-30 01:04:54,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 105.0) internal successors, (1050), 10 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states 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 01:04:54,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states 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 01:04:54,860 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states 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 01:04:54,860 INFO L175 Difference]: Start difference. First operand has 40 places, 27 transitions, 133 flow. Second operand 10 states and 1050 transitions. [2023-08-30 01:04:54,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 377 flow [2023-08-30 01:04:54,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 367 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 01:04:54,862 INFO L231 Difference]: Finished difference. Result has 49 places, 28 transitions, 164 flow [2023-08-30 01:04:54,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=164, PETRI_PLACES=49, PETRI_TRANSITIONS=28} [2023-08-30 01:04:54,863 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 15 predicate places. [2023-08-30 01:04:54,863 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 28 transitions, 164 flow [2023-08-30 01:04:54,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 99.25) internal successors, (794), 8 states have internal predecessors, (794), 0 states have call successors, (0), 0 states 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 01:04:54,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:04:54,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:04:54,876 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 01:04:55,073 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 01:04:55,074 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:04:55,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:04:55,074 INFO L85 PathProgramCache]: Analyzing trace with hash 538927056, now seen corresponding path program 1 times [2023-08-30 01:04:55,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:04:55,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453184143] [2023-08-30 01:04:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:04:55,075 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 01:04:55,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:04:55,076 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 01:04:55,079 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 01:04:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:04:55,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:04:55,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:04:55,167 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 01:04:55,167 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 01:04:55,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:04:55,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:04:55,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:04:55,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453184143] [2023-08-30 01:04:55,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453184143] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:04:55,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:04:55,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:04:55,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077259198] [2023-08-30 01:04:55,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:04:55,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:04:55,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:04:55,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:04:55,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:04:55,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 268 [2023-08-30 01:04:55,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 28 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 106.25) internal successors, (425), 4 states have internal predecessors, (425), 0 states have call successors, (0), 0 states 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 01:04:55,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:04:55,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 268 [2023-08-30 01:04:55,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:04:55,387 INFO L130 PetriNetUnfolder]: 93/189 cut-off events. [2023-08-30 01:04:55,388 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 01:04:55,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534 conditions, 189 events. 93/189 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 561 event pairs, 51 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 512. Up to 182 conditions per place. [2023-08-30 01:04:55,389 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 20 selfloop transitions, 6 changer transitions 0/26 dead transitions. [2023-08-30 01:04:55,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 26 transitions, 208 flow [2023-08-30 01:04:55,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:04:55,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:04:55,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 440 transitions. [2023-08-30 01:04:55,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41044776119402987 [2023-08-30 01:04:55,391 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 440 transitions. [2023-08-30 01:04:55,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 440 transitions. [2023-08-30 01:04:55,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:04:55,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 440 transitions. [2023-08-30 01:04:55,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 01:04:55,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states 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 01:04:55,395 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states 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 01:04:55,395 INFO L175 Difference]: Start difference. First operand has 49 places, 28 transitions, 164 flow. Second operand 4 states and 440 transitions. [2023-08-30 01:04:55,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 26 transitions, 208 flow [2023-08-30 01:04:55,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 26 transitions, 158 flow, removed 11 selfloop flow, removed 9 redundant places. [2023-08-30 01:04:55,397 INFO L231 Difference]: Finished difference. Result has 41 places, 26 transitions, 118 flow [2023-08-30 01:04:55,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=118, PETRI_PLACES=41, PETRI_TRANSITIONS=26} [2023-08-30 01:04:55,397 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-08-30 01:04:55,398 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 26 transitions, 118 flow [2023-08-30 01:04:55,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.25) internal successors, (425), 4 states have internal predecessors, (425), 0 states have call successors, (0), 0 states 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 01:04:55,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:04:55,398 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 01:04:55,410 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 01:04:55,615 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 01:04:55,615 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:04:55,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:04:55,615 INFO L85 PathProgramCache]: Analyzing trace with hash -472851024, now seen corresponding path program 2 times [2023-08-30 01:04:55,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:04:55,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725787654] [2023-08-30 01:04:55,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:04:55,616 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 01:04:55,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:04:55,618 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 01:04:55,620 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 01:04:55,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:04:55,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:04:55,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 01:04:55,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:04:55,742 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:04:55,742 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:04:55,887 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 01:04:55,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:04:56,373 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 01:04:56,374 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:04:56,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725787654] [2023-08-30 01:04:56,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725787654] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:04:56,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:04:56,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 01:04:56,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760447212] [2023-08-30 01:04:56,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:04:56,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:04:56,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:04:56,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:04:56,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 01:04:58,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 268 [2023-08-30 01:04:58,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 26 transitions, 118 flow. Second operand has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states 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 01:04:58,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:04:58,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 268 [2023-08-30 01:04:58,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:05:00,849 INFO L130 PetriNetUnfolder]: 314/600 cut-off events. [2023-08-30 01:05:00,849 INFO L131 PetriNetUnfolder]: For 579/579 co-relation queries the response was YES. [2023-08-30 01:05:00,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1712 conditions, 600 events. 314/600 cut-off events. For 579/579 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2467 event pairs, 180 based on Foata normal form. 6/606 useless extension candidates. Maximal degree in co-relation 1694. Up to 229 conditions per place. [2023-08-30 01:05:00,852 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 142 selfloop transitions, 12 changer transitions 0/154 dead transitions. [2023-08-30 01:05:00,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 154 transitions, 864 flow [2023-08-30 01:05:00,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 01:05:00,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 01:05:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1396 transitions. [2023-08-30 01:05:00,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43407960199004975 [2023-08-30 01:05:00,858 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1396 transitions. [2023-08-30 01:05:00,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1396 transitions. [2023-08-30 01:05:00,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:05:00,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1396 transitions. [2023-08-30 01:05:00,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 116.33333333333333) internal successors, (1396), 12 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states 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 01:05:00,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 268.0) internal successors, (3484), 13 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states 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 01:05:00,867 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 268.0) internal successors, (3484), 13 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states 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 01:05:00,867 INFO L175 Difference]: Start difference. First operand has 41 places, 26 transitions, 118 flow. Second operand 12 states and 1396 transitions. [2023-08-30 01:05:00,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 154 transitions, 864 flow [2023-08-30 01:05:00,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 154 transitions, 851 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:05:00,872 INFO L231 Difference]: Finished difference. Result has 57 places, 33 transitions, 209 flow [2023-08-30 01:05:00,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=209, PETRI_PLACES=57, PETRI_TRANSITIONS=33} [2023-08-30 01:05:00,873 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 23 predicate places. [2023-08-30 01:05:00,873 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 33 transitions, 209 flow [2023-08-30 01:05:00,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states 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 01:05:00,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:05:00,874 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 01:05:00,887 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 01:05:01,083 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 01:05:01,083 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:05:01,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:05:01,084 INFO L85 PathProgramCache]: Analyzing trace with hash 856746578, now seen corresponding path program 2 times [2023-08-30 01:05:01,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:05:01,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070342703] [2023-08-30 01:05:01,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:05:01,085 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 01:05:01,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:05:01,086 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 01:05:01,086 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 01:05:01,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 01:05:01,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:05:01,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 01:05:01,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:05:01,220 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:05:01,220 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:05:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 01:05:01,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:05:01,298 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:05:01,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070342703] [2023-08-30 01:05:01,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070342703] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:05:01,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:05:01,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:05:01,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837933674] [2023-08-30 01:05:01,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:05:01,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:05:01,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:05:01,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:05:01,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:05:01,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 268 [2023-08-30 01:05:01,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 33 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states 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 01:05:01,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:05:01,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 268 [2023-08-30 01:05:01,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:05:01,557 INFO L130 PetriNetUnfolder]: 200/402 cut-off events. [2023-08-30 01:05:01,557 INFO L131 PetriNetUnfolder]: For 486/486 co-relation queries the response was YES. [2023-08-30 01:05:01,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 402 events. 200/402 cut-off events. For 486/486 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1496 event pairs, 90 based on Foata normal form. 72/474 useless extension candidates. Maximal degree in co-relation 1011. Up to 389 conditions per place. [2023-08-30 01:05:01,559 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 24 selfloop transitions, 7 changer transitions 0/31 dead transitions. [2023-08-30 01:05:01,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 31 transitions, 255 flow [2023-08-30 01:05:01,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:05:01,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:05:01,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 434 transitions. [2023-08-30 01:05:01,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4048507462686567 [2023-08-30 01:05:01,562 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 434 transitions. [2023-08-30 01:05:01,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 434 transitions. [2023-08-30 01:05:01,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:05:01,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 434 transitions. [2023-08-30 01:05:01,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states 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 01:05:01,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states 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 01:05:01,565 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states 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 01:05:01,565 INFO L175 Difference]: Start difference. First operand has 57 places, 33 transitions, 209 flow. Second operand 4 states and 434 transitions. [2023-08-30 01:05:01,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 31 transitions, 255 flow [2023-08-30 01:05:01,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 31 transitions, 230 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-08-30 01:05:01,567 INFO L231 Difference]: Finished difference. Result has 52 places, 31 transitions, 182 flow [2023-08-30 01:05:01,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=52, PETRI_TRANSITIONS=31} [2023-08-30 01:05:01,569 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2023-08-30 01:05:01,569 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 31 transitions, 182 flow [2023-08-30 01:05:01,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states 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 01:05:01,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:05:01,570 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 01:05:01,580 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 (13)] Ended with exit code 0 [2023-08-30 01:05:01,778 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 01:05:01,778 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:05:01,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:05:01,778 INFO L85 PathProgramCache]: Analyzing trace with hash 23278736, now seen corresponding path program 3 times [2023-08-30 01:05:01,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:05:01,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530654222] [2023-08-30 01:05:01,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:05:01,779 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 01:05:01,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:05:01,780 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 01:05:01,781 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 01:05:01,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 01:05:01,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:05:01,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 01:05:01,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:05:02,010 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:05:02,010 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:05:02,355 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 01:05:02,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:05:04,203 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 01:05:04,203 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:05:04,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530654222] [2023-08-30 01:05:04,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530654222] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:05:04,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:05:04,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 01:05:04,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755041891] [2023-08-30 01:05:04,204 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:05:04,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 01:05:04,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:05:04,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 01:05:04,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 01:05:11,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 268 [2023-08-30 01:05:11,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 31 transitions, 182 flow. Second operand has 24 states, 24 states have (on average 104.0) internal successors, (2496), 24 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states 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 01:05:11,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:05:11,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 268 [2023-08-30 01:05:11,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:05:24,756 INFO L130 PetriNetUnfolder]: 452/894 cut-off events. [2023-08-30 01:05:24,757 INFO L131 PetriNetUnfolder]: For 557/557 co-relation queries the response was YES. [2023-08-30 01:05:24,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2284 conditions, 894 events. 452/894 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3588 event pairs, 198 based on Foata normal form. 12/906 useless extension candidates. Maximal degree in co-relation 2260. Up to 253 conditions per place. [2023-08-30 01:05:24,760 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 286 selfloop transitions, 24 changer transitions 0/310 dead transitions. [2023-08-30 01:05:24,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 310 transitions, 1732 flow [2023-08-30 01:05:24,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 01:05:24,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 01:05:24,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2794 transitions. [2023-08-30 01:05:24,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4343905472636816 [2023-08-30 01:05:24,768 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2794 transitions. [2023-08-30 01:05:24,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2794 transitions. [2023-08-30 01:05:24,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:05:24,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2794 transitions. [2023-08-30 01:05:24,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 116.41666666666667) internal successors, (2794), 24 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states 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 01:05:24,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 268.0) internal successors, (6700), 25 states have internal predecessors, (6700), 0 states have call successors, (0), 0 states 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 01:05:24,790 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 268.0) internal successors, (6700), 25 states have internal predecessors, (6700), 0 states have call successors, (0), 0 states 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 01:05:24,790 INFO L175 Difference]: Start difference. First operand has 52 places, 31 transitions, 182 flow. Second operand 24 states and 2794 transitions. [2023-08-30 01:05:24,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 310 transitions, 1732 flow [2023-08-30 01:05:24,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 310 transitions, 1707 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:05:24,798 INFO L231 Difference]: Finished difference. Result has 86 places, 44 transitions, 361 flow [2023-08-30 01:05:24,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=361, PETRI_PLACES=86, PETRI_TRANSITIONS=44} [2023-08-30 01:05:24,800 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 52 predicate places. [2023-08-30 01:05:24,801 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 44 transitions, 361 flow [2023-08-30 01:05:24,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 104.0) internal successors, (2496), 24 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states 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 01:05:24,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:05:24,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:05:24,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 01:05:25,012 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 01:05:25,013 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:05:25,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:05:25,013 INFO L85 PathProgramCache]: Analyzing trace with hash -235118424, now seen corresponding path program 1 times [2023-08-30 01:05:25,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:05:25,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972231848] [2023-08-30 01:05:25,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:05:25,013 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 01:05:25,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:05:25,015 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 01:05:25,016 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 01:05:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:05:25,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 01:05:25,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:05:25,102 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 01:05:25,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:05:25,102 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:05:25,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972231848] [2023-08-30 01:05:25,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972231848] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:05:25,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:05:25,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:05:25,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374533748] [2023-08-30 01:05:25,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:05:25,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:05:25,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:05:25,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:05:25,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:05:25,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 268 [2023-08-30 01:05:25,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 44 transitions, 361 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 01:05:25,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:05:25,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 268 [2023-08-30 01:05:25,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:05:25,342 INFO L130 PetriNetUnfolder]: 788/1502 cut-off events. [2023-08-30 01:05:25,343 INFO L131 PetriNetUnfolder]: For 505/505 co-relation queries the response was YES. [2023-08-30 01:05:25,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3784 conditions, 1502 events. 788/1502 cut-off events. For 505/505 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 6956 event pairs, 198 based on Foata normal form. 22/1524 useless extension candidates. Maximal degree in co-relation 3747. Up to 757 conditions per place. [2023-08-30 01:05:25,349 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 47 selfloop transitions, 2 changer transitions 3/52 dead transitions. [2023-08-30 01:05:25,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 52 transitions, 487 flow [2023-08-30 01:05:25,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:05:25,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:05:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 358 transitions. [2023-08-30 01:05:25,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44527363184079605 [2023-08-30 01:05:25,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 358 transitions. [2023-08-30 01:05:25,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 358 transitions. [2023-08-30 01:05:25,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:05:25,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 358 transitions. [2023-08-30 01:05:25,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states 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 01:05:25,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 01:05:25,355 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 01:05:25,355 INFO L175 Difference]: Start difference. First operand has 86 places, 44 transitions, 361 flow. Second operand 3 states and 358 transitions. [2023-08-30 01:05:25,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 52 transitions, 487 flow [2023-08-30 01:05:25,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 52 transitions, 439 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-08-30 01:05:25,363 INFO L231 Difference]: Finished difference. Result has 79 places, 44 transitions, 319 flow [2023-08-30 01:05:25,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=79, PETRI_TRANSITIONS=44} [2023-08-30 01:05:25,364 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 45 predicate places. [2023-08-30 01:05:25,364 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 44 transitions, 319 flow [2023-08-30 01:05:25,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 01:05:25,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:05:25,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:05:25,372 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 01:05:25,568 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 01:05:25,569 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:05:25,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:05:25,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1873389343, now seen corresponding path program 1 times [2023-08-30 01:05:25,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:05:25,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199974060] [2023-08-30 01:05:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:05:25,570 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 01:05:25,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:05:25,571 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 01:05:25,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 01:05:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:05:25,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 01:05:25,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:05:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:05:25,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:05:25,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:05:25,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199974060] [2023-08-30 01:05:25,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199974060] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:05:25,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:05:25,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:05:25,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035755271] [2023-08-30 01:05:25,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:05:25,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:05:25,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:05:25,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:05:25,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:05:25,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 268 [2023-08-30 01:05:25,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 44 transitions, 319 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states 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 01:05:25,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:05:25,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 268 [2023-08-30 01:05:25,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:05:25,988 INFO L130 PetriNetUnfolder]: 1023/2027 cut-off events. [2023-08-30 01:05:25,988 INFO L131 PetriNetUnfolder]: For 1109/1109 co-relation queries the response was YES. [2023-08-30 01:05:25,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5309 conditions, 2027 events. 1023/2027 cut-off events. For 1109/1109 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 10933 event pairs, 340 based on Foata normal form. 120/2147 useless extension candidates. Maximal degree in co-relation 5270. Up to 1461 conditions per place. [2023-08-30 01:05:25,996 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 46 selfloop transitions, 2 changer transitions 5/53 dead transitions. [2023-08-30 01:05:25,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 53 transitions, 448 flow [2023-08-30 01:05:25,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:05:25,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:05:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2023-08-30 01:05:25,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43905472636815923 [2023-08-30 01:05:25,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2023-08-30 01:05:25,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2023-08-30 01:05:25,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:05:25,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2023-08-30 01:05:26,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states 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 01:05:26,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 01:05:26,002 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 01:05:26,002 INFO L175 Difference]: Start difference. First operand has 79 places, 44 transitions, 319 flow. Second operand 3 states and 353 transitions. [2023-08-30 01:05:26,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 53 transitions, 448 flow [2023-08-30 01:05:26,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 53 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:05:26,009 INFO L231 Difference]: Finished difference. Result has 79 places, 45 transitions, 331 flow [2023-08-30 01:05:26,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=331, PETRI_PLACES=79, PETRI_TRANSITIONS=45} [2023-08-30 01:05:26,010 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 45 predicate places. [2023-08-30 01:05:26,010 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 45 transitions, 331 flow [2023-08-30 01:05:26,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states 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 01:05:26,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:05:26,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:05:26,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 01:05:26,211 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 01:05:26,211 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:05:26,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:05:26,211 INFO L85 PathProgramCache]: Analyzing trace with hash 289744, now seen corresponding path program 1 times [2023-08-30 01:05:26,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:05:26,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736960930] [2023-08-30 01:05:26,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:05:26,212 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 01:05:26,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:05:26,213 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 01:05:26,216 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 01:05:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:05:26,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 01:05:26,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:05:26,375 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 01:05:26,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:05:26,470 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2023-08-30 01:05:26,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 90 treesize of output 27 [2023-08-30 01:05:26,499 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 01:05:26,499 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:05:26,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736960930] [2023-08-30 01:05:26,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736960930] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:05:26,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:05:26,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2023-08-30 01:05:26,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594875432] [2023-08-30 01:05:26,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:05:26,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 01:05:26,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:05:26,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 01:05:26,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:05:26,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-08-30 01:05:26,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 45 transitions, 331 flow. Second operand has 6 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:26,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:05:26,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-08-30 01:05:26,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:05:27,478 INFO L130 PetriNetUnfolder]: 1703/3267 cut-off events. [2023-08-30 01:05:27,478 INFO L131 PetriNetUnfolder]: For 2309/2309 co-relation queries the response was YES. [2023-08-30 01:05:27,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9231 conditions, 3267 events. 1703/3267 cut-off events. For 2309/2309 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 19471 event pairs, 260 based on Foata normal form. 20/3287 useless extension candidates. Maximal degree in co-relation 9190. Up to 1160 conditions per place. [2023-08-30 01:05:27,493 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 55 selfloop transitions, 6 changer transitions 9/70 dead transitions. [2023-08-30 01:05:27,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 70 transitions, 547 flow [2023-08-30 01:05:27,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:05:27,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:05:27,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 553 transitions. [2023-08-30 01:05:27,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126865671641791 [2023-08-30 01:05:27,496 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 553 transitions. [2023-08-30 01:05:27,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 553 transitions. [2023-08-30 01:05:27,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:05:27,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 553 transitions. [2023-08-30 01:05:27,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.6) internal successors, (553), 5 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 01:05:27,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states 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 01:05:27,501 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states 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 01:05:27,501 INFO L175 Difference]: Start difference. First operand has 79 places, 45 transitions, 331 flow. Second operand 5 states and 553 transitions. [2023-08-30 01:05:27,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 70 transitions, 547 flow [2023-08-30 01:05:27,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 70 transitions, 543 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 01:05:27,506 INFO L231 Difference]: Finished difference. Result has 84 places, 48 transitions, 368 flow [2023-08-30 01:05:27,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=368, PETRI_PLACES=84, PETRI_TRANSITIONS=48} [2023-08-30 01:05:27,508 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 50 predicate places. [2023-08-30 01:05:27,508 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 48 transitions, 368 flow [2023-08-30 01:05:27,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:27,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:05:27,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:05:27,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 01:05:27,718 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 01:05:27,718 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:05:27,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:05:27,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1604271614, now seen corresponding path program 2 times [2023-08-30 01:05:27,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:05:27,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982453675] [2023-08-30 01:05:27,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:05:27,719 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 01:05:27,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:05:27,720 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 01:05:27,727 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 01:05:27,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:05:27,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:05:27,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 01:05:27,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:05:27,865 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 39 treesize of output 37 [2023-08-30 01:05:27,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 51 treesize of output 47 [2023-08-30 01:05:28,075 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 01:05:28,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:05:28,268 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 01:05:28,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 73 [2023-08-30 01:05:28,457 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 01:05:28,457 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:05:28,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982453675] [2023-08-30 01:05:28,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982453675] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:05:28,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:05:28,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-08-30 01:05:28,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568958320] [2023-08-30 01:05:28,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:05:28,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 01:05:28,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:05:28,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 01:05:28,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-08-30 01:05:28,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-08-30 01:05:28,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 48 transitions, 368 flow. Second operand has 9 states, 9 states have (on average 99.22222222222223) internal successors, (893), 9 states have internal predecessors, (893), 0 states have call successors, (0), 0 states 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 01:05:28,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:05:28,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-08-30 01:05:28,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:05:29,738 INFO L130 PetriNetUnfolder]: 2023/3847 cut-off events. [2023-08-30 01:05:29,739 INFO L131 PetriNetUnfolder]: For 4289/4289 co-relation queries the response was YES. [2023-08-30 01:05:29,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11774 conditions, 3847 events. 2023/3847 cut-off events. For 4289/4289 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 23418 event pairs, 360 based on Foata normal form. 20/3867 useless extension candidates. Maximal degree in co-relation 11730. Up to 1280 conditions per place. [2023-08-30 01:05:29,763 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 55 selfloop transitions, 6 changer transitions 9/70 dead transitions. [2023-08-30 01:05:29,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 70 transitions, 573 flow [2023-08-30 01:05:29,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:05:29,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:05:29,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 527 transitions. [2023-08-30 01:05:29,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932835820895522 [2023-08-30 01:05:29,768 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 527 transitions. [2023-08-30 01:05:29,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 527 transitions. [2023-08-30 01:05:29,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:05:29,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 527 transitions. [2023-08-30 01:05:29,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states 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 01:05:29,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states 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 01:05:29,778 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states 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 01:05:29,778 INFO L175 Difference]: Start difference. First operand has 84 places, 48 transitions, 368 flow. Second operand 5 states and 527 transitions. [2023-08-30 01:05:29,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 70 transitions, 573 flow [2023-08-30 01:05:29,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 70 transitions, 568 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:05:29,795 INFO L231 Difference]: Finished difference. Result has 87 places, 49 transitions, 391 flow [2023-08-30 01:05:29,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=391, PETRI_PLACES=87, PETRI_TRANSITIONS=49} [2023-08-30 01:05:29,796 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 53 predicate places. [2023-08-30 01:05:29,796 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 49 transitions, 391 flow [2023-08-30 01:05:29,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 99.22222222222223) internal successors, (893), 9 states have internal predecessors, (893), 0 states have call successors, (0), 0 states 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 01:05:29,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:05:29,797 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:05:29,810 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 01:05:30,007 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 01:05:30,008 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:05:30,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:05:30,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1614039090, now seen corresponding path program 3 times [2023-08-30 01:05:30,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:05:30,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018693525] [2023-08-30 01:05:30,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:05:30,009 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 01:05:30,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:05:30,011 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 01:05:30,012 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 01:05:30,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 01:05:30,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:05:30,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 01:05:30,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:05:30,213 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:05:30,214 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:05:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:05:30,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:05:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:05:30,902 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:05:30,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018693525] [2023-08-30 01:05:30,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018693525] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:05:30,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:05:30,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-30 01:05:30,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200199822] [2023-08-30 01:05:30,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:05:30,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:05:30,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:05:30,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:05:30,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-08-30 01:05:32,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 268 [2023-08-30 01:05:32,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 49 transitions, 391 flow. Second operand has 12 states, 12 states have (on average 96.41666666666667) internal successors, (1157), 12 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states 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 01:05:32,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:05:32,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 268 [2023-08-30 01:05:32,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:05:33,271 INFO L130 PetriNetUnfolder]: 1995/3805 cut-off events. [2023-08-30 01:05:33,272 INFO L131 PetriNetUnfolder]: For 7382/7382 co-relation queries the response was YES. [2023-08-30 01:05:33,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12336 conditions, 3805 events. 1995/3805 cut-off events. For 7382/7382 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 22960 event pairs, 588 based on Foata normal form. 12/3817 useless extension candidates. Maximal degree in co-relation 12291. Up to 1923 conditions per place. [2023-08-30 01:05:33,288 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 42 selfloop transitions, 11 changer transitions 31/84 dead transitions. [2023-08-30 01:05:33,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 84 transitions, 688 flow [2023-08-30 01:05:33,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 01:05:33,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 01:05:33,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 901 transitions. [2023-08-30 01:05:33,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37354892205638474 [2023-08-30 01:05:33,291 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 901 transitions. [2023-08-30 01:05:33,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 901 transitions. [2023-08-30 01:05:33,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:05:33,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 901 transitions. [2023-08-30 01:05:33,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 100.11111111111111) internal successors, (901), 9 states have internal predecessors, (901), 0 states have call successors, (0), 0 states 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 01:05:33,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states 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 01:05:33,296 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states 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 01:05:33,296 INFO L175 Difference]: Start difference. First operand has 87 places, 49 transitions, 391 flow. Second operand 9 states and 901 transitions. [2023-08-30 01:05:33,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 84 transitions, 688 flow [2023-08-30 01:05:33,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 84 transitions, 673 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 01:05:33,319 INFO L231 Difference]: Finished difference. Result has 94 places, 48 transitions, 401 flow [2023-08-30 01:05:33,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=401, PETRI_PLACES=94, PETRI_TRANSITIONS=48} [2023-08-30 01:05:33,320 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 60 predicate places. [2023-08-30 01:05:33,320 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 48 transitions, 401 flow [2023-08-30 01:05:33,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 96.41666666666667) internal successors, (1157), 12 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states 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 01:05:33,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:05:33,321 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:05:33,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 01:05:33,531 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 01:05:33,532 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:05:33,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:05:33,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1259228725, now seen corresponding path program 4 times [2023-08-30 01:05:33,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:05:33,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921238971] [2023-08-30 01:05:33,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 01:05:33,533 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 01:05:33,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:05:33,534 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 01:05:33,536 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 01:05:33,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 01:05:33,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:05:33,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 01:05:33,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:05:33,685 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:05:33,686 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:05:33,754 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 13 treesize of output 9 [2023-08-30 01:05:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:05:33,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:05:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:05:34,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:05:34,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921238971] [2023-08-30 01:05:34,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921238971] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:05:34,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:05:34,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 01:05:34,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071234042] [2023-08-30 01:05:34,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:05:34,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 01:05:34,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:05:34,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 01:05:34,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-08-30 01:05:35,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-08-30 01:05:35,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 48 transitions, 401 flow. Second operand has 14 states, 14 states have (on average 99.21428571428571) internal successors, (1389), 14 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states 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 01:05:35,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:05:35,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-08-30 01:05:35,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:05:37,476 INFO L130 PetriNetUnfolder]: 4330/8394 cut-off events. [2023-08-30 01:05:37,477 INFO L131 PetriNetUnfolder]: For 19554/19554 co-relation queries the response was YES. [2023-08-30 01:05:37,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26407 conditions, 8394 events. 4330/8394 cut-off events. For 19554/19554 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 61824 event pairs, 1285 based on Foata normal form. 372/8766 useless extension candidates. Maximal degree in co-relation 26361. Up to 3440 conditions per place. [2023-08-30 01:05:37,513 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 94 selfloop transitions, 22 changer transitions 10/126 dead transitions. [2023-08-30 01:05:37,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 126 transitions, 1050 flow [2023-08-30 01:05:37,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 01:05:37,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 01:05:37,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1255 transitions. [2023-08-30 01:05:37,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902363184079602 [2023-08-30 01:05:37,518 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1255 transitions. [2023-08-30 01:05:37,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1255 transitions. [2023-08-30 01:05:37,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:05:37,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1255 transitions. [2023-08-30 01:05:37,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 104.58333333333333) internal successors, (1255), 12 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states 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 01:05:37,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 268.0) internal successors, (3484), 13 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states 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 01:05:37,525 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 268.0) internal successors, (3484), 13 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states 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 01:05:37,525 INFO L175 Difference]: Start difference. First operand has 94 places, 48 transitions, 401 flow. Second operand 12 states and 1255 transitions. [2023-08-30 01:05:37,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 126 transitions, 1050 flow [2023-08-30 01:05:37,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 126 transitions, 997 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-08-30 01:05:37,603 INFO L231 Difference]: Finished difference. Result has 100 places, 64 transitions, 624 flow [2023-08-30 01:05:37,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=624, PETRI_PLACES=100, PETRI_TRANSITIONS=64} [2023-08-30 01:05:37,604 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 66 predicate places. [2023-08-30 01:05:37,604 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 64 transitions, 624 flow [2023-08-30 01:05:37,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 99.21428571428571) internal successors, (1389), 14 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states 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 01:05:37,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:05:37,605 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:05:37,617 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 (20)] Forceful destruction successful, exit code 0 [2023-08-30 01:05:37,815 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 01:05:37,815 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:05:37,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:05:37,816 INFO L85 PathProgramCache]: Analyzing trace with hash -517506536, now seen corresponding path program 5 times [2023-08-30 01:05:37,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:05:37,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267643451] [2023-08-30 01:05:37,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 01:05:37,816 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 01:05:37,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:05:37,817 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 01:05:37,818 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 01:05:37,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:05:37,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:05:37,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 01:05:37,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:05:38,048 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 01:05:38,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:05:38,135 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2023-08-30 01:05:38,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2023-08-30 01:05:38,195 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 01:05:38,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:05:38,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267643451] [2023-08-30 01:05:38,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267643451] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:05:38,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:05:38,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-08-30 01:05:38,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940770712] [2023-08-30 01:05:38,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:05:38,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 01:05:38,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:05:38,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 01:05:38,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-08-30 01:05:38,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-08-30 01:05:38,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 64 transitions, 624 flow. Second operand has 9 states, 9 states have (on average 104.88888888888889) internal successors, (944), 9 states have internal predecessors, (944), 0 states have call successors, (0), 0 states 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 01:05:38,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:05:38,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-08-30 01:05:38,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:05:40,502 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 01:05:42,744 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 01:05:44,318 INFO L130 PetriNetUnfolder]: 6732/12821 cut-off events. [2023-08-30 01:05:44,318 INFO L131 PetriNetUnfolder]: For 40321/40321 co-relation queries the response was YES. [2023-08-30 01:05:44,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47795 conditions, 12821 events. 6732/12821 cut-off events. For 40321/40321 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 98770 event pairs, 642 based on Foata normal form. 22/12843 useless extension candidates. Maximal degree in co-relation 47746. Up to 3833 conditions per place. [2023-08-30 01:05:44,387 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 101 selfloop transitions, 35 changer transitions 14/150 dead transitions. [2023-08-30 01:05:44,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 150 transitions, 1449 flow [2023-08-30 01:05:44,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 01:05:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 01:05:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1108 transitions. [2023-08-30 01:05:44,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134328358208955 [2023-08-30 01:05:44,395 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1108 transitions. [2023-08-30 01:05:44,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1108 transitions. [2023-08-30 01:05:44,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:05:44,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1108 transitions. [2023-08-30 01:05:44,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 110.8) internal successors, (1108), 10 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states 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 01:05:44,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states 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 01:05:44,404 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states 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 01:05:44,404 INFO L175 Difference]: Start difference. First operand has 100 places, 64 transitions, 624 flow. Second operand 10 states and 1108 transitions. [2023-08-30 01:05:44,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 150 transitions, 1449 flow [2023-08-30 01:05:44,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 150 transitions, 1352 flow, removed 45 selfloop flow, removed 3 redundant places. [2023-08-30 01:05:44,683 INFO L231 Difference]: Finished difference. Result has 111 places, 83 transitions, 943 flow [2023-08-30 01:05:44,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=943, PETRI_PLACES=111, PETRI_TRANSITIONS=83} [2023-08-30 01:05:44,683 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 77 predicate places. [2023-08-30 01:05:44,683 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 83 transitions, 943 flow [2023-08-30 01:05:44,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 104.88888888888889) internal successors, (944), 9 states have internal predecessors, (944), 0 states have call successors, (0), 0 states 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 01:05:44,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:05:44,684 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:05:44,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 01:05:44,896 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 01:05:44,896 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:05:44,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:05:44,897 INFO L85 PathProgramCache]: Analyzing trace with hash 325092292, now seen corresponding path program 6 times [2023-08-30 01:05:44,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:05:44,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705074365] [2023-08-30 01:05:44,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 01:05:44,897 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 01:05:44,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:05:44,898 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 01:05:44,899 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 01:05:45,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 01:05:45,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:05:45,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 01:05:45,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:05:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 01:05:45,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:05:45,170 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2023-08-30 01:05:45,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 90 treesize of output 27 [2023-08-30 01:05:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 01:05:45,242 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:05:45,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705074365] [2023-08-30 01:05:45,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705074365] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:05:45,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:05:45,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-30 01:05:45,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178086685] [2023-08-30 01:05:45,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:05:45,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:05:45,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:05:45,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:05:45,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:05:45,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-08-30 01:05:45,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 83 transitions, 943 flow. Second operand has 8 states, 8 states have (on average 105.375) internal successors, (843), 8 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 01:05:45,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:05:45,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-08-30 01:05:45,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:05:47,281 INFO L130 PetriNetUnfolder]: 6732/12743 cut-off events. [2023-08-30 01:05:47,281 INFO L131 PetriNetUnfolder]: For 49146/49146 co-relation queries the response was YES. [2023-08-30 01:05:47,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50165 conditions, 12743 events. 6732/12743 cut-off events. For 49146/49146 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 97346 event pairs, 702 based on Foata normal form. 78/12821 useless extension candidates. Maximal degree in co-relation 50110. Up to 3043 conditions per place. [2023-08-30 01:05:47,344 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 80 selfloop transitions, 30 changer transitions 38/148 dead transitions. [2023-08-30 01:05:47,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 148 transitions, 1481 flow [2023-08-30 01:05:47,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 01:05:47,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 01:05:47,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1108 transitions. [2023-08-30 01:05:47,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134328358208955 [2023-08-30 01:05:47,348 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1108 transitions. [2023-08-30 01:05:47,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1108 transitions. [2023-08-30 01:05:47,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:05:47,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1108 transitions. [2023-08-30 01:05:47,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 110.8) internal successors, (1108), 10 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states 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 01:05:47,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states 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 01:05:47,353 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states 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 01:05:47,353 INFO L175 Difference]: Start difference. First operand has 111 places, 83 transitions, 943 flow. Second operand 10 states and 1108 transitions. [2023-08-30 01:05:47,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 148 transitions, 1481 flow [2023-08-30 01:05:47,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 148 transitions, 1391 flow, removed 35 selfloop flow, removed 4 redundant places. [2023-08-30 01:05:47,893 INFO L231 Difference]: Finished difference. Result has 120 places, 81 transitions, 928 flow [2023-08-30 01:05:47,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=928, PETRI_PLACES=120, PETRI_TRANSITIONS=81} [2023-08-30 01:05:47,894 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 86 predicate places. [2023-08-30 01:05:47,894 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 81 transitions, 928 flow [2023-08-30 01:05:47,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 105.375) internal successors, (843), 8 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 01:05:47,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:05:47,894 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:05:47,911 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 01:05:48,105 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 01:05:48,105 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:05:48,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:05:48,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1100956100, now seen corresponding path program 7 times [2023-08-30 01:05:48,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:05:48,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543220529] [2023-08-30 01:05:48,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 01:05:48,106 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 01:05:48,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:05:48,107 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 01:05:48,108 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 01:05:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:05:48,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 01:05:48,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:05:48,270 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 01:05:48,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 48 [2023-08-30 01:05:48,512 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 01:05:48,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:05:48,560 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_545 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_545) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv7 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv6 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv5 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv4 32) .cse1)))) (_ bv5 32))) is different from false [2023-08-30 01:05:48,675 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2023-08-30 01:05:48,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2023-08-30 01:05:48,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 01:05:48,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2023-08-30 01:05:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-08-30 01:05:48,950 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:05:48,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543220529] [2023-08-30 01:05:48,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543220529] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:05:48,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:05:48,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-08-30 01:05:48,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066152717] [2023-08-30 01:05:48,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:05:48,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 01:05:48,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:05:48,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 01:05:48,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=108, Unknown=1, NotChecked=20, Total=156 [2023-08-30 01:05:49,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-08-30 01:05:49,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 81 transitions, 928 flow. Second operand has 13 states, 13 states have (on average 85.92307692307692) internal successors, (1117), 13 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states 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 01:05:49,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:05:49,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-08-30 01:05:49,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:05:51,229 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 01:05:53,817 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 01:05:55,570 INFO L130 PetriNetUnfolder]: 7674/14327 cut-off events. [2023-08-30 01:05:55,570 INFO L131 PetriNetUnfolder]: For 64061/64061 co-relation queries the response was YES. [2023-08-30 01:05:55,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57313 conditions, 14327 events. 7674/14327 cut-off events. For 64061/64061 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 109259 event pairs, 717 based on Foata normal form. 22/14349 useless extension candidates. Maximal degree in co-relation 57256. Up to 3018 conditions per place. [2023-08-30 01:05:55,634 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 82 selfloop transitions, 44 changer transitions 29/155 dead transitions. [2023-08-30 01:05:55,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 155 transitions, 1578 flow [2023-08-30 01:05:55,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 01:05:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 01:05:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1015 transitions. [2023-08-30 01:05:55,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3443012211668928 [2023-08-30 01:05:55,637 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1015 transitions. [2023-08-30 01:05:55,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1015 transitions. [2023-08-30 01:05:55,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:05:55,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1015 transitions. [2023-08-30 01:05:55,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 92.27272727272727) internal successors, (1015), 11 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states 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 01:05:55,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states 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 01:05:55,642 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states 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 01:05:55,642 INFO L175 Difference]: Start difference. First operand has 120 places, 81 transitions, 928 flow. Second operand 11 states and 1015 transitions. [2023-08-30 01:05:55,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 155 transitions, 1578 flow [2023-08-30 01:05:55,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 155 transitions, 1551 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 01:05:55,856 INFO L231 Difference]: Finished difference. Result has 128 places, 91 transitions, 1144 flow [2023-08-30 01:05:55,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1144, PETRI_PLACES=128, PETRI_TRANSITIONS=91} [2023-08-30 01:05:55,856 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 94 predicate places. [2023-08-30 01:05:55,856 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 91 transitions, 1144 flow [2023-08-30 01:05:55,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 85.92307692307692) internal successors, (1117), 13 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states 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 01:05:55,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:05:55,857 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:05:55,866 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 01:05:56,059 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 01:05:56,059 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:05:56,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:05:56,059 INFO L85 PathProgramCache]: Analyzing trace with hash -485854586, now seen corresponding path program 8 times [2023-08-30 01:05:56,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:05:56,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753618272] [2023-08-30 01:05:56,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:05:56,060 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 01:05:56,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:05:56,061 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 01:05:56,064 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 01:05:56,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:05:56,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:05:56,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 01:05:56,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:05:56,246 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:05:56,246 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:05:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:05:56,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:05:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:05:57,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:05:57,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753618272] [2023-08-30 01:05:57,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753618272] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:05:57,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:05:57,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-08-30 01:05:57,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201240989] [2023-08-30 01:05:57,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:05:57,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 01:05:57,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:05:57,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 01:05:57,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-30 01:06:01,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 268 [2023-08-30 01:06:01,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 91 transitions, 1144 flow. Second operand has 18 states, 18 states have (on average 95.94444444444444) internal successors, (1727), 18 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states 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 01:06:01,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:06:01,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 268 [2023-08-30 01:06:01,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:06:04,914 INFO L130 PetriNetUnfolder]: 7572/14295 cut-off events. [2023-08-30 01:06:04,914 INFO L131 PetriNetUnfolder]: For 82137/82137 co-relation queries the response was YES. [2023-08-30 01:06:04,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67523 conditions, 14295 events. 7572/14295 cut-off events. For 82137/82137 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 111309 event pairs, 4481 based on Foata normal form. 36/14331 useless extension candidates. Maximal degree in co-relation 67464. Up to 13342 conditions per place. [2023-08-30 01:06:04,977 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 69 selfloop transitions, 5 changer transitions 71/145 dead transitions. [2023-08-30 01:06:04,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 145 transitions, 1810 flow [2023-08-30 01:06:04,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 01:06:04,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 01:06:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1099 transitions. [2023-08-30 01:06:04,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37279511533242876 [2023-08-30 01:06:04,980 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1099 transitions. [2023-08-30 01:06:04,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1099 transitions. [2023-08-30 01:06:04,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:06:04,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1099 transitions. [2023-08-30 01:06:04,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 99.9090909090909) internal successors, (1099), 11 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states 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 01:06:04,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states 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 01:06:04,985 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states 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 01:06:04,985 INFO L175 Difference]: Start difference. First operand has 128 places, 91 transitions, 1144 flow. Second operand 11 states and 1099 transitions. [2023-08-30 01:06:04,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 145 transitions, 1810 flow [2023-08-30 01:06:05,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 145 transitions, 1718 flow, removed 21 selfloop flow, removed 7 redundant places. [2023-08-30 01:06:05,347 INFO L231 Difference]: Finished difference. Result has 134 places, 74 transitions, 861 flow [2023-08-30 01:06:05,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=861, PETRI_PLACES=134, PETRI_TRANSITIONS=74} [2023-08-30 01:06:05,347 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 100 predicate places. [2023-08-30 01:06:05,348 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 74 transitions, 861 flow [2023-08-30 01:06:05,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 95.94444444444444) internal successors, (1727), 18 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states 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 01:06:05,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:06:05,348 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:06:05,356 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 01:06:05,548 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 01:06:05,549 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:06:05,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:06:05,549 INFO L85 PathProgramCache]: Analyzing trace with hash -944070495, now seen corresponding path program 9 times [2023-08-30 01:06:05,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:06:05,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017249014] [2023-08-30 01:06:05,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:06:05,550 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 01:06:05,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:06:05,551 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 01:06:05,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 01:06:05,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 01:06:05,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:06:05,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 01:06:05,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:06:06,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:06:06,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:06:07,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:06:07,032 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:06:07,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017249014] [2023-08-30 01:06:07,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017249014] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:06:07,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:06:07,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-08-30 01:06:07,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473380942] [2023-08-30 01:06:07,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:06:07,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 01:06:07,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:06:07,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 01:06:07,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2023-08-30 01:06:08,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 268 [2023-08-30 01:06:08,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 74 transitions, 861 flow. Second operand has 20 states, 20 states have (on average 102.85) internal successors, (2057), 20 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states 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 01:06:08,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:06:08,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 268 [2023-08-30 01:06:08,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:06:14,680 INFO L130 PetriNetUnfolder]: 15803/29565 cut-off events. [2023-08-30 01:06:14,681 INFO L131 PetriNetUnfolder]: For 167634/167634 co-relation queries the response was YES. [2023-08-30 01:06:14,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134842 conditions, 29565 events. 15803/29565 cut-off events. For 167634/167634 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 257196 event pairs, 2938 based on Foata normal form. 388/29953 useless extension candidates. Maximal degree in co-relation 134780. Up to 16155 conditions per place. [2023-08-30 01:06:14,837 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 148 selfloop transitions, 105 changer transitions 22/275 dead transitions. [2023-08-30 01:06:14,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 275 transitions, 3629 flow [2023-08-30 01:06:14,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 01:06:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 01:06:14,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2066 transitions. [2023-08-30 01:06:14,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057344854673998 [2023-08-30 01:06:14,842 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2066 transitions. [2023-08-30 01:06:14,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2066 transitions. [2023-08-30 01:06:14,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:06:14,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2066 transitions. [2023-08-30 01:06:14,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 108.73684210526316) internal successors, (2066), 19 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states 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 01:06:14,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 268.0) internal successors, (5360), 20 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states 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 01:06:14,850 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 268.0) internal successors, (5360), 20 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states 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 01:06:14,850 INFO L175 Difference]: Start difference. First operand has 134 places, 74 transitions, 861 flow. Second operand 19 states and 2066 transitions. [2023-08-30 01:06:14,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 275 transitions, 3629 flow [2023-08-30 01:06:16,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 275 transitions, 3141 flow, removed 188 selfloop flow, removed 13 redundant places. [2023-08-30 01:06:16,242 INFO L231 Difference]: Finished difference. Result has 131 places, 170 transitions, 2280 flow [2023-08-30 01:06:16,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2280, PETRI_PLACES=131, PETRI_TRANSITIONS=170} [2023-08-30 01:06:16,243 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 97 predicate places. [2023-08-30 01:06:16,243 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 170 transitions, 2280 flow [2023-08-30 01:06:16,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 102.85) internal successors, (2057), 20 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states 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 01:06:16,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:06:16,244 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:06:16,252 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 (25)] Forceful destruction successful, exit code 0 [2023-08-30 01:06:16,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 01:06:16,445 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:06:16,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:06:16,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2013336490, now seen corresponding path program 10 times [2023-08-30 01:06:16,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:06:16,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334110672] [2023-08-30 01:06:16,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 01:06:16,446 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 01:06:16,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:06:16,447 INFO L229 MonitoredProcess]: Starting monitored process 26 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 01:06:16,447 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 (26)] Waiting until timeout for monitored process [2023-08-30 01:06:16,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 01:06:16,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:06:16,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 01:06:16,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:06:16,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 01:06:16,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:06:16,906 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2023-08-30 01:06:16,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2023-08-30 01:06:17,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 01:06:17,016 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:06:17,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334110672] [2023-08-30 01:06:17,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334110672] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:06:17,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:06:17,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-08-30 01:06:17,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376475192] [2023-08-30 01:06:17,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:06:17,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:06:17,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:06:17,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:06:17,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-08-30 01:06:17,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-08-30 01:06:17,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 170 transitions, 2280 flow. Second operand has 12 states, 12 states have (on average 104.41666666666667) internal successors, (1253), 12 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states 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 01:06:17,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:06:17,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-08-30 01:06:17,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:06:19,635 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 01:06:21,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:06:24,058 WARN L539 Checker$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 01:06:26,132 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 01:06:31,427 INFO L130 PetriNetUnfolder]: 20355/38037 cut-off events. [2023-08-30 01:06:31,427 INFO L131 PetriNetUnfolder]: For 167841/167841 co-relation queries the response was YES. [2023-08-30 01:06:31,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168390 conditions, 38037 events. 20355/38037 cut-off events. For 167841/167841 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 340484 event pairs, 1861 based on Foata normal form. 133/38170 useless extension candidates. Maximal degree in co-relation 168336. Up to 20849 conditions per place. [2023-08-30 01:06:31,683 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 152 selfloop transitions, 166 changer transitions 19/337 dead transitions. [2023-08-30 01:06:31,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 337 transitions, 4572 flow [2023-08-30 01:06:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 01:06:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 01:06:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1443 transitions. [2023-08-30 01:06:31,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4141791044776119 [2023-08-30 01:06:31,686 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1443 transitions. [2023-08-30 01:06:31,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1443 transitions. [2023-08-30 01:06:31,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:06:31,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1443 transitions. [2023-08-30 01:06:31,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 111.0) internal successors, (1443), 13 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states 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 01:06:31,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states 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 01:06:31,691 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states 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 01:06:31,691 INFO L175 Difference]: Start difference. First operand has 131 places, 170 transitions, 2280 flow. Second operand 13 states and 1443 transitions. [2023-08-30 01:06:31,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 337 transitions, 4572 flow [2023-08-30 01:06:33,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 337 transitions, 4005 flow, removed 279 selfloop flow, removed 5 redundant places. [2023-08-30 01:06:33,300 INFO L231 Difference]: Finished difference. Result has 145 places, 233 transitions, 3433 flow [2023-08-30 01:06:33,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=2017, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3433, PETRI_PLACES=145, PETRI_TRANSITIONS=233} [2023-08-30 01:06:33,301 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 111 predicate places. [2023-08-30 01:06:33,301 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 233 transitions, 3433 flow [2023-08-30 01:06:33,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 104.41666666666667) internal successors, (1253), 12 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states 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 01:06:33,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:06:33,302 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:06:33,310 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 (26)] Forceful destruction successful, exit code 0 [2023-08-30 01:06:33,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 01:06:33,503 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:06:33,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:06:33,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1159581924, now seen corresponding path program 11 times [2023-08-30 01:06:33,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:06:33,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617802027] [2023-08-30 01:06:33,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 01:06:33,504 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 01:06:33,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:06:33,505 INFO L229 MonitoredProcess]: Starting monitored process 27 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 01:06:33,506 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 (27)] Waiting until timeout for monitored process [2023-08-30 01:06:33,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 01:06:33,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:06:33,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 01:06:33,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:06:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 01:06:33,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:06:33,887 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2023-08-30 01:06:33,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2023-08-30 01:06:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 01:06:33,991 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:06:33,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617802027] [2023-08-30 01:06:33,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617802027] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:06:33,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:06:33,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-08-30 01:06:33,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93568588] [2023-08-30 01:06:33,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:06:33,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 01:06:33,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:06:33,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 01:06:33,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-08-30 01:06:34,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-08-30 01:06:34,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 233 transitions, 3433 flow. Second operand has 11 states, 11 states have (on average 104.72727272727273) internal successors, (1152), 11 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states 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 01:06:34,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:06:34,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-08-30 01:06:34,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:06:36,616 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 01:06:39,038 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 01:06:46,192 INFO L130 PetriNetUnfolder]: 24249/45118 cut-off events. [2023-08-30 01:06:46,192 INFO L131 PetriNetUnfolder]: For 226610/226610 co-relation queries the response was YES. [2023-08-30 01:06:46,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196664 conditions, 45118 events. 24249/45118 cut-off events. For 226610/226610 co-relation queries the response was YES. Maximal size of possible extension queue 1066. Compared 409518 event pairs, 1908 based on Foata normal form. 167/45285 useless extension candidates. Maximal degree in co-relation 196603. Up to 24749 conditions per place. [2023-08-30 01:06:46,733 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 196 selfloop transitions, 185 changer transitions 32/413 dead transitions. [2023-08-30 01:06:46,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 413 transitions, 5505 flow [2023-08-30 01:06:46,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 01:06:46,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 01:06:46,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2223 transitions. [2023-08-30 01:06:46,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147388059701492 [2023-08-30 01:06:46,737 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2223 transitions. [2023-08-30 01:06:46,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2223 transitions. [2023-08-30 01:06:46,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:06:46,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2223 transitions. [2023-08-30 01:06:46,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 111.15) internal successors, (2223), 20 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states 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 01:06:46,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 268.0) internal successors, (5628), 21 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states 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 01:06:46,744 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 268.0) internal successors, (5628), 21 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states 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 01:06:46,744 INFO L175 Difference]: Start difference. First operand has 145 places, 233 transitions, 3433 flow. Second operand 20 states and 2223 transitions. [2023-08-30 01:06:46,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 413 transitions, 5505 flow [2023-08-30 01:06:49,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 413 transitions, 5451 flow, removed 19 selfloop flow, removed 3 redundant places. [2023-08-30 01:06:49,732 INFO L231 Difference]: Finished difference. Result has 170 places, 269 transitions, 4421 flow [2023-08-30 01:06:49,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4421, PETRI_PLACES=170, PETRI_TRANSITIONS=269} [2023-08-30 01:06:49,732 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 136 predicate places. [2023-08-30 01:06:49,732 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 269 transitions, 4421 flow [2023-08-30 01:06:49,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 104.72727272727273) internal successors, (1152), 11 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states 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 01:06:49,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:06:49,733 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:06:49,742 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 (27)] Ended with exit code 0 [2023-08-30 01:06:49,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 01:06:49,933 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:06:49,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:06:49,934 INFO L85 PathProgramCache]: Analyzing trace with hash -679674416, now seen corresponding path program 12 times [2023-08-30 01:06:49,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:06:49,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445301978] [2023-08-30 01:06:49,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 01:06:49,934 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 01:06:49,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:06:49,935 INFO L229 MonitoredProcess]: Starting monitored process 28 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 01:06:49,937 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 (28)] Waiting until timeout for monitored process [2023-08-30 01:06:50,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 01:06:50,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:06:50,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 01:06:50,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:06:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 01:06:50,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:07:09,226 INFO L321 Elim1Store]: treesize reduction 424, result has 3.9 percent of original size [2023-08-30 01:07:09,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 137 treesize of output 46 [2023-08-30 01:07:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 01:07:09,430 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:07:09,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445301978] [2023-08-30 01:07:09,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445301978] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:07:09,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:07:09,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 01:07:09,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464749664] [2023-08-30 01:07:09,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:07:09,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 01:07:09,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:07:09,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 01:07:09,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=165, Unknown=9, NotChecked=0, Total=210 [2023-08-30 01:07:11,598 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 01:07:13,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:07:15,760 WARN L539 Checker$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 01:07:17,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:07:20,006 WARN L539 Checker$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 01:07:22,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:07:22,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-08-30 01:07:22,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 269 transitions, 4421 flow. Second operand has 15 states, 15 states have (on average 99.33333333333333) internal successors, (1490), 15 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:07:22,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:07:22,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-08-30 01:07:22,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:07:24,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:07:36,637 WARN L222 SmtUtils]: Spent 10.09s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:07:38,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:07:48,892 WARN L222 SmtUtils]: Spent 10.08s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:07:50,901 WARN L539 Checker$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 01:07:52,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:07:55,052 WARN L539 Checker$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 01:07:57,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:07:59,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:08:01,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:08:03,839 WARN L539 Checker$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 01:08:06,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:08:16,656 WARN L222 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:08:21,324 WARN L539 Checker$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 01:08:23,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:08:25,689 WARN L539 Checker$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 01:08:27,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:08:29,758 WARN L539 Checker$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 01:08:32,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:08:44,707 WARN L222 SmtUtils]: Spent 10.11s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:08:46,794 WARN L539 Checker$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 01:08:48,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:08:51,069 WARN L539 Checker$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 01:09:01,301 WARN L222 SmtUtils]: Spent 10.09s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:09:03,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:05,397 WARN L539 Checker$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 01:09:07,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:13,950 WARN L539 Checker$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 01:09:16,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:18,277 WARN L539 Checker$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 01:09:20,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:27,859 WARN L539 Checker$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 01:09:29,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:37,854 WARN L539 Checker$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 01:09:49,806 INFO L130 PetriNetUnfolder]: 42259/78176 cut-off events. [2023-08-30 01:09:49,807 INFO L131 PetriNetUnfolder]: For 533344/533344 co-relation queries the response was YES. [2023-08-30 01:09:50,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363438 conditions, 78176 events. 42259/78176 cut-off events. For 533344/533344 co-relation queries the response was YES. Maximal size of possible extension queue 1846. Compared 763439 event pairs, 8493 based on Foata normal form. 185/78361 useless extension candidates. Maximal degree in co-relation 363368. Up to 43105 conditions per place. [2023-08-30 01:09:50,934 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 328 selfloop transitions, 196 changer transitions 79/603 dead transitions. [2023-08-30 01:09:50,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 603 transitions, 8763 flow [2023-08-30 01:09:50,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 01:09:50,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 01:09:50,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2959 transitions. [2023-08-30 01:09:50,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943230277185501 [2023-08-30 01:09:50,944 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2959 transitions. [2023-08-30 01:09:50,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2959 transitions. [2023-08-30 01:09:50,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:09:50,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2959 transitions. [2023-08-30 01:09:50,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 105.67857142857143) internal successors, (2959), 28 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states 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 01:09:50,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 268.0) internal successors, (7772), 29 states have internal predecessors, (7772), 0 states have call successors, (0), 0 states 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 01:09:50,955 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 268.0) internal successors, (7772), 29 states have internal predecessors, (7772), 0 states have call successors, (0), 0 states 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 01:09:50,955 INFO L175 Difference]: Start difference. First operand has 170 places, 269 transitions, 4421 flow. Second operand 28 states and 2959 transitions. [2023-08-30 01:09:50,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 603 transitions, 8763 flow [2023-08-30 01:10:03,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 603 transitions, 8587 flow, removed 73 selfloop flow, removed 1 redundant places. [2023-08-30 01:10:03,292 INFO L231 Difference]: Finished difference. Result has 218 places, 404 transitions, 7481 flow [2023-08-30 01:10:03,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=4359, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7481, PETRI_PLACES=218, PETRI_TRANSITIONS=404} [2023-08-30 01:10:03,293 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 184 predicate places. [2023-08-30 01:10:03,293 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 404 transitions, 7481 flow [2023-08-30 01:10:03,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 99.33333333333333) internal successors, (1490), 15 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states 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 01:10:03,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:10:03,293 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:10:03,301 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 (28)] Ended with exit code 0 [2023-08-30 01:10:03,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 01:10:03,494 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:10:03,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:10:03,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1021554218, now seen corresponding path program 13 times [2023-08-30 01:10:03,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:10:03,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557072996] [2023-08-30 01:10:03,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 01:10:03,495 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 01:10:03,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:10:03,496 INFO L229 MonitoredProcess]: Starting monitored process 29 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 01:10:03,496 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 (29)] Waiting until timeout for monitored process [2023-08-30 01:10:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:10:03,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 01:10:03,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:10:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 01:10:03,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:10:03,811 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2023-08-30 01:10:03,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 90 treesize of output 27 [2023-08-30 01:10:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 01:10:03,900 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:10:03,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557072996] [2023-08-30 01:10:03,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557072996] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:10:03,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:10:03,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-08-30 01:10:03,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036887683] [2023-08-30 01:10:03,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:10:03,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 01:10:03,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:10:03,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 01:10:03,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-30 01:10:04,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-08-30 01:10:04,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 404 transitions, 7481 flow. Second operand has 10 states, 10 states have (on average 105.1) internal successors, (1051), 10 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states 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 01:10:04,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:10:04,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-08-30 01:10:04,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:10:21,116 INFO L130 PetriNetUnfolder]: 42259/78027 cut-off events. [2023-08-30 01:10:21,116 INFO L131 PetriNetUnfolder]: For 775127/775127 co-relation queries the response was YES. [2023-08-30 01:10:22,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413467 conditions, 78027 events. 42259/78027 cut-off events. For 775127/775127 co-relation queries the response was YES. Maximal size of possible extension queue 1838. Compared 760181 event pairs, 4558 based on Foata normal form. 149/78176 useless extension candidates. Maximal degree in co-relation 413374. Up to 43105 conditions per place. [2023-08-30 01:10:22,356 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 198 selfloop transitions, 194 changer transitions 121/513 dead transitions. [2023-08-30 01:10:22,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 513 transitions, 9119 flow [2023-08-30 01:10:22,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 01:10:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 01:10:22,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1664 transitions. [2023-08-30 01:10:22,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41393034825870645 [2023-08-30 01:10:22,361 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1664 transitions. [2023-08-30 01:10:22,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1664 transitions. [2023-08-30 01:10:22,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:10:22,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1664 transitions. [2023-08-30 01:10:22,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 110.93333333333334) internal successors, (1664), 15 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states 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 01:10:22,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 268.0) internal successors, (4288), 16 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states 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 01:10:22,367 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 268.0) internal successors, (4288), 16 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states 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 01:10:22,367 INFO L175 Difference]: Start difference. First operand has 218 places, 404 transitions, 7481 flow. Second operand 15 states and 1664 transitions. [2023-08-30 01:10:22,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 513 transitions, 9119 flow [2023-08-30 01:10:50,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 513 transitions, 8926 flow, removed 94 selfloop flow, removed 1 redundant places. [2023-08-30 01:10:50,862 INFO L231 Difference]: Finished difference. Result has 238 places, 349 transitions, 6785 flow [2023-08-30 01:10:50,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=7288, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6785, PETRI_PLACES=238, PETRI_TRANSITIONS=349} [2023-08-30 01:10:50,863 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 204 predicate places. [2023-08-30 01:10:50,863 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 349 transitions, 6785 flow [2023-08-30 01:10:50,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 105.1) internal successors, (1051), 10 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states 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 01:10:50,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:10:50,864 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:10:50,873 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 (29)] Forceful destruction successful, exit code 0 [2023-08-30 01:10:51,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 01:10:51,068 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:10:51,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:10:51,068 INFO L85 PathProgramCache]: Analyzing trace with hash -577813634, now seen corresponding path program 14 times [2023-08-30 01:10:51,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:10:51,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237799619] [2023-08-30 01:10:51,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:10:51,069 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 01:10:51,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:10:51,070 INFO L229 MonitoredProcess]: Starting monitored process 30 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 01:10:51,070 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 (30)] Waiting until timeout for monitored process [2023-08-30 01:10:51,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:10:51,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:10:51,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 01:10:51,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:10:51,278 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 42 treesize of output 38 [2023-08-30 01:10:51,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 48 [2023-08-30 01:10:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 01:10:51,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:10:51,630 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_784 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_784) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv11 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv10 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv9 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv8 32) .cse1)))) (_ bv5 32))) is different from false [2023-08-30 01:10:51,741 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2023-08-30 01:10:51,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2023-08-30 01:10:51,747 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 01:10:51,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2023-08-30 01:10:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2023-08-30 01:10:52,010 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:10:52,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237799619] [2023-08-30 01:10:52,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237799619] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:10:52,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:10:52,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2023-08-30 01:10:52,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246187136] [2023-08-30 01:10:52,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:10:52,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 01:10:52,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:10:52,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 01:10:52,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=179, Unknown=1, NotChecked=26, Total=240 [2023-08-30 01:10:52,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-08-30 01:10:52,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 349 transitions, 6785 flow. Second operand has 16 states, 16 states have (on average 85.75) internal successors, (1372), 16 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states 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 01:10:52,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:10:52,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-08-30 01:10:52,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:10:54,309 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 01:10:56,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:10:58,785 WARN L539 Checker$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 01:11:00,898 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 01:11:18,307 INFO L130 PetriNetUnfolder]: 41973/77455 cut-off events. [2023-08-30 01:11:18,308 INFO L131 PetriNetUnfolder]: For 852699/852699 co-relation queries the response was YES. [2023-08-30 01:11:19,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427299 conditions, 77455 events. 41973/77455 cut-off events. For 852699/852699 co-relation queries the response was YES. Maximal size of possible extension queue 1851. Compared 752052 event pairs, 4192 based on Foata normal form. 25/77480 useless extension candidates. Maximal degree in co-relation 427197. Up to 42825 conditions per place. [2023-08-30 01:11:19,493 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 127 selfloop transitions, 286 changer transitions 40/453 dead transitions. [2023-08-30 01:11:19,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 453 transitions, 8384 flow [2023-08-30 01:11:19,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 01:11:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 01:11:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1201 transitions. [2023-08-30 01:11:19,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3447187141216992 [2023-08-30 01:11:19,498 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1201 transitions. [2023-08-30 01:11:19,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1201 transitions. [2023-08-30 01:11:19,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:11:19,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1201 transitions. [2023-08-30 01:11:19,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 92.38461538461539) internal successors, (1201), 13 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states 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 01:11:19,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states 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 01:11:19,502 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states 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 01:11:19,502 INFO L175 Difference]: Start difference. First operand has 238 places, 349 transitions, 6785 flow. Second operand 13 states and 1201 transitions. [2023-08-30 01:11:19,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 453 transitions, 8384 flow [2023-08-30 01:11:48,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 453 transitions, 7996 flow, removed 30 selfloop flow, removed 8 redundant places. [2023-08-30 01:11:48,497 INFO L231 Difference]: Finished difference. Result has 240 places, 355 transitions, 7135 flow [2023-08-30 01:11:48,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=6397, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7135, PETRI_PLACES=240, PETRI_TRANSITIONS=355} [2023-08-30 01:11:48,500 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 206 predicate places. [2023-08-30 01:11:48,500 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 355 transitions, 7135 flow [2023-08-30 01:11:48,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 85.75) internal successors, (1372), 16 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states 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 01:11:48,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:11:48,501 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:11:48,519 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 (30)] Forceful destruction successful, exit code 0 [2023-08-30 01:11:48,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 01:11:48,703 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:11:48,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:11:48,704 INFO L85 PathProgramCache]: Analyzing trace with hash 685549326, now seen corresponding path program 15 times [2023-08-30 01:11:48,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:11:48,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256121422] [2023-08-30 01:11:48,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:11:48,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:48,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:11:48,705 INFO L229 MonitoredProcess]: Starting monitored process 31 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 01:11:48,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-08-30 01:11:48,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 01:11:48,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:11:48,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 01:11:48,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:11:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:49,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:11:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:50,600 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:11:50,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256121422] [2023-08-30 01:11:50,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256121422] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:11:50,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:11:50,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-08-30 01:11:50,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901061163] [2023-08-30 01:11:50,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:11:50,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 01:11:50,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:11:50,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 01:11:50,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2023-08-30 01:11:51,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 268 [2023-08-30 01:11:51,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 355 transitions, 7135 flow. Second operand has 24 states, 24 states have (on average 102.70833333333333) internal successors, (2465), 24 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states 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 01:11:51,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:11:51,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 268 [2023-08-30 01:11:51,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:12:27,722 INFO L130 PetriNetUnfolder]: 70516/129761 cut-off events. [2023-08-30 01:12:27,722 INFO L131 PetriNetUnfolder]: For 1381982/1381982 co-relation queries the response was YES. [2023-08-30 01:12:29,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723413 conditions, 129761 events. 70516/129761 cut-off events. For 1381982/1381982 co-relation queries the response was YES. Maximal size of possible extension queue 3208. Compared 1358857 event pairs, 10138 based on Foata normal form. 485/130246 useless extension candidates. Maximal degree in co-relation 723312. Up to 71755 conditions per place. [2023-08-30 01:12:29,576 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 220 selfloop transitions, 337 changer transitions 5/562 dead transitions. [2023-08-30 01:12:29,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 562 transitions, 11196 flow [2023-08-30 01:12:29,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 01:12:29,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 01:12:29,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2182 transitions. [2023-08-30 01:12:29,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.407089552238806 [2023-08-30 01:12:29,580 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2182 transitions. [2023-08-30 01:12:29,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2182 transitions. [2023-08-30 01:12:29,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:12:29,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2182 transitions. [2023-08-30 01:12:29,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 109.1) internal successors, (2182), 20 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states 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 01:12:29,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 268.0) internal successors, (5628), 21 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states 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 01:12:29,587 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 268.0) internal successors, (5628), 21 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states 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 01:12:29,587 INFO L175 Difference]: Start difference. First operand has 240 places, 355 transitions, 7135 flow. Second operand 20 states and 2182 transitions. [2023-08-30 01:12:29,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 562 transitions, 11196 flow [2023-08-30 01:13:37,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 562 transitions, 10422 flow, removed 224 selfloop flow, removed 8 redundant places. [2023-08-30 01:13:37,365 INFO L231 Difference]: Finished difference. Result has 252 places, 449 transitions, 8985 flow [2023-08-30 01:13:37,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=5550, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=8985, PETRI_PLACES=252, PETRI_TRANSITIONS=449} [2023-08-30 01:13:37,366 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 218 predicate places. [2023-08-30 01:13:37,366 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 449 transitions, 8985 flow [2023-08-30 01:13:37,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 102.70833333333333) internal successors, (2465), 24 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states 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 01:13:37,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:13:37,367 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:13:37,377 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 (31)] Forceful destruction successful, exit code 0 [2023-08-30 01:13:37,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 01:13:37,571 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:13:37,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:13:37,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1375805561, now seen corresponding path program 16 times [2023-08-30 01:13:37,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:13:37,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547670580] [2023-08-30 01:13:37,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 01:13:37,572 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 01:13:37,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:13:37,573 INFO L229 MonitoredProcess]: Starting monitored process 32 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 01:13:37,574 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 (32)] Waiting until timeout for monitored process [2023-08-30 01:13:37,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 01:13:37,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:13:37,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 01:13:37,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:13:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 01:13:37,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:13:37,915 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2023-08-30 01:13:37,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 90 treesize of output 27 [2023-08-30 01:13:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 01:13:38,081 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:13:38,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547670580] [2023-08-30 01:13:38,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547670580] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:13:38,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:13:38,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 01:13:38,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044794920] [2023-08-30 01:13:38,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:13:38,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:13:38,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:13:38,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:13:38,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-08-30 01:13:38,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-08-30 01:13:38,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 449 transitions, 8985 flow. Second operand has 12 states, 12 states have (on average 104.91666666666667) internal successors, (1259), 12 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states 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 01:13:38,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:13:38,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-08-30 01:13:38,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:14:14,441 INFO L130 PetriNetUnfolder]: 75706/139397 cut-off events. [2023-08-30 01:14:14,441 INFO L131 PetriNetUnfolder]: For 1621323/1621323 co-relation queries the response was YES. [2023-08-30 01:14:16,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 804438 conditions, 139397 events. 75706/139397 cut-off events. For 1621323/1621323 co-relation queries the response was YES. Maximal size of possible extension queue 3456. Compared 1466139 event pairs, 7106 based on Foata normal form. 408/139805 useless extension candidates. Maximal degree in co-relation 804336. Up to 77167 conditions per place. [2023-08-30 01:14:16,372 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 183 selfloop transitions, 417 changer transitions 24/624 dead transitions. [2023-08-30 01:14:16,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 624 transitions, 12148 flow [2023-08-30 01:14:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 01:14:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 01:14:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2119 transitions. [2023-08-30 01:14:16,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41614296936370776 [2023-08-30 01:14:16,376 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2119 transitions. [2023-08-30 01:14:16,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2119 transitions. [2023-08-30 01:14:16,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:14:16,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2119 transitions. [2023-08-30 01:14:16,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 111.52631578947368) internal successors, (2119), 19 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states 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 01:14:16,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 268.0) internal successors, (5360), 20 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states 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 01:14:16,383 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 268.0) internal successors, (5360), 20 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states 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 01:14:16,383 INFO L175 Difference]: Start difference. First operand has 252 places, 449 transitions, 8985 flow. Second operand 19 states and 2119 transitions. [2023-08-30 01:14:16,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 624 transitions, 12148 flow [2023-08-30 01:15:54,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 624 transitions, 11635 flow, removed 251 selfloop flow, removed 5 redundant places. [2023-08-30 01:15:54,089 INFO L231 Difference]: Finished difference. Result has 275 places, 502 transitions, 10686 flow [2023-08-30 01:15:54,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=8598, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10686, PETRI_PLACES=275, PETRI_TRANSITIONS=502} [2023-08-30 01:15:54,089 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 241 predicate places. [2023-08-30 01:15:54,090 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 502 transitions, 10686 flow [2023-08-30 01:15:54,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 104.91666666666667) internal successors, (1259), 12 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states 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 01:15:54,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:15:54,090 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:15:54,100 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 (32)] Forceful destruction successful, exit code 0 [2023-08-30 01:15:54,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 01:15:54,293 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 01:15:54,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:15:54,293 INFO L85 PathProgramCache]: Analyzing trace with hash 363354899, now seen corresponding path program 17 times [2023-08-30 01:15:54,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:15:54,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159172464] [2023-08-30 01:15:54,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 01:15:54,294 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 01:15:54,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:15:54,295 INFO L229 MonitoredProcess]: Starting monitored process 33 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 01:15:54,295 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 (33)] Waiting until timeout for monitored process [2023-08-30 01:15:54,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 01:15:54,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:15:54,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 01:15:54,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:15:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 01:15:54,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:15:54,714 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2023-08-30 01:15:54,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2023-08-30 01:15:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 01:15:54,877 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:15:54,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159172464] [2023-08-30 01:15:54,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159172464] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:15:54,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:15:54,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-08-30 01:15:54,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966657657] [2023-08-30 01:15:54,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:15:54,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 01:15:54,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:15:54,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 01:15:54,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-08-30 01:15:55,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-08-30 01:15:55,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 502 transitions, 10686 flow. Second operand has 13 states, 13 states have (on average 104.61538461538461) internal successors, (1360), 13 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states 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 01:15:55,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:15:55,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-08-30 01:15:55,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:15:57,406 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 01:15:59,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []