./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/unroll-cond-5.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 b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:55:10,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:55:10,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:55:10,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:55:10,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:55:10,057 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:55:10,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:55:10,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:55:10,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:55:10,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:55:10,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:55:10,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:55:10,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:55:10,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:55:10,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:55:10,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:55:10,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:55:10,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:55:10,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:55:10,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:55:10,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:55:10,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:55:10,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:55:10,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:55:10,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:55:10,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:55:10,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:55:10,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:55:10,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:55:10,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:55:10,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:55:10,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:55:10,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:55:10,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:55:10,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:55:10,110 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:55:10,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:55:10,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:55:10,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:55:10,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:55:10,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:55:10,112 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 07:55:10,136 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:55:10,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:55:10,137 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:55:10,137 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:55:10,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:55:10,139 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:55:10,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:55:10,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:55:10,140 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:55:10,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:55:10,141 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:55:10,141 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:55:10,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:55:10,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:55:10,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:55:10,141 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:55:10,141 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:55:10,142 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:55:10,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:55:10,142 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:55:10,142 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:55:10,142 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:55:10,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:55:10,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:55:10,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:55:10,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:55:10,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:55:10,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:55:10,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 07:55:10,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 07:55:10,143 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:55:10,144 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:55:10,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:55:10,144 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:55:10,144 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:55:10,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:55:10,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:55:10,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:55:10,372 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:55:10,372 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:55:10,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c [2023-08-30 07:55:11,353 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:55:11,508 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:55:11,509 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c [2023-08-30 07:55:11,513 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/593230a29/d546e6e6d53f4a8789b79ba2483c7f3d/FLAG0e8c91edf [2023-08-30 07:55:11,523 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/593230a29/d546e6e6d53f4a8789b79ba2483c7f3d [2023-08-30 07:55:11,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:55:11,525 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:55:11,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:55:11,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:55:11,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:55:11,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:55:11" (1/1) ... [2023-08-30 07:55:11,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@540b0f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:55:11, skipping insertion in model container [2023-08-30 07:55:11,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:55:11" (1/1) ... [2023-08-30 07:55:11,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:55:11,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:55:11,663 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/unroll-cond-5.wvr.c[2975,2988] [2023-08-30 07:55:11,674 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:55:11,683 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 07:55:11,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@59a54ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:55:11, skipping insertion in model container [2023-08-30 07:55:11,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:55:11,685 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 07:55:11,686 INFO L158 Benchmark]: Toolchain (without parser) took 160.13ms. Allocated memory is still 77.6MB. Free memory was 56.5MB in the beginning and 46.6MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 07:55:11,686 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 77.6MB. Free memory is still 55.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 07:55:11,687 INFO L158 Benchmark]: CACSL2BoogieTranslator took 157.94ms. Allocated memory is still 77.6MB. Free memory was 56.5MB in the beginning and 46.6MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 07:55:11,688 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 77.6MB. Free memory is still 55.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 157.94ms. Allocated memory is still 77.6MB. Free memory was 56.5MB in the beginning and 46.6MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 124]: 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/unroll-cond-5.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 b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:55:13,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:55:13,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:55:13,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:55:13,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:55:13,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:55:13,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:55:13,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:55:13,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:55:13,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:55:13,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:55:13,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:55:13,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:55:13,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:55:13,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:55:13,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:55:13,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:55:13,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:55:13,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:55:13,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:55:13,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:55:13,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:55:13,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:55:13,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:55:13,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:55:13,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:55:13,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:55:13,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:55:13,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:55:13,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:55:13,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:55:13,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:55:13,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:55:13,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:55:13,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:55:13,195 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:55:13,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:55:13,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:55:13,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:55:13,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:55:13,204 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:55:13,205 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 07:55:13,237 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:55:13,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:55:13,238 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:55:13,238 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:55:13,239 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:55:13,239 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:55:13,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:55:13,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:55:13,239 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:55:13,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:55:13,240 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:55:13,240 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:55:13,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:55:13,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:55:13,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:55:13,241 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:55:13,241 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:55:13,241 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:55:13,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:55:13,241 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:55:13,242 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 07:55:13,242 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 07:55:13,242 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:55:13,242 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:55:13,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:55:13,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:55:13,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:55:13,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:55:13,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:55:13,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:55:13,243 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 07:55:13,243 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 07:55:13,243 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:55:13,243 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:55:13,244 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:55:13,244 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 07:55:13,244 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:55:13,244 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:55:13,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:55:13,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:55:13,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:55:13,480 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:55:13,480 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:55:13,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c [2023-08-30 07:55:14,492 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:55:14,613 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:55:14,613 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c [2023-08-30 07:55:14,618 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b699ef39e/1e67f4724ce14ff7b004e4501190f185/FLAG699552a09 [2023-08-30 07:55:14,630 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b699ef39e/1e67f4724ce14ff7b004e4501190f185 [2023-08-30 07:55:14,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:55:14,638 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:55:14,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:55:14,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:55:14,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:55:14,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:55:14" (1/1) ... [2023-08-30 07:55:14,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a73eb8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:55:14, skipping insertion in model container [2023-08-30 07:55:14,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:55:14" (1/1) ... [2023-08-30 07:55:14,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:55:14,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:55:14,834 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/unroll-cond-5.wvr.c[2975,2988] [2023-08-30 07:55:14,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:55:14,852 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 07:55:14,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:55:14,876 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/unroll-cond-5.wvr.c[2975,2988] [2023-08-30 07:55:14,878 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:55:14,886 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 07:55:14,905 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/unroll-cond-5.wvr.c[2975,2988] [2023-08-30 07:55:14,906 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:55:14,917 INFO L208 MainTranslator]: Completed translation [2023-08-30 07:55:14,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:55:14 WrapperNode [2023-08-30 07:55:14,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:55:14,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 07:55:14,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 07:55:14,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 07:55:14,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:55:14" (1/1) ... [2023-08-30 07:55:14,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:55:14" (1/1) ... [2023-08-30 07:55:14,946 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 205 [2023-08-30 07:55:14,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 07:55:14,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 07:55:14,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 07:55:14,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 07:55:14,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:55:14" (1/1) ... [2023-08-30 07:55:14,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:55:14" (1/1) ... [2023-08-30 07:55:14,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:55:14" (1/1) ... [2023-08-30 07:55:14,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:55:14" (1/1) ... [2023-08-30 07:55:14,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:55:14" (1/1) ... [2023-08-30 07:55:14,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:55:14" (1/1) ... [2023-08-30 07:55:14,966 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:55:14" (1/1) ... [2023-08-30 07:55:14,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:55:14" (1/1) ... [2023-08-30 07:55:14,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 07:55:14,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 07:55:14,970 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 07:55:14,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 07:55:14,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:55:14" (1/1) ... [2023-08-30 07:55:14,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:55:14,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:55:14,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 07:55:14,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 07:55:15,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 07:55:15,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 07:55:15,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 07:55:15,014 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 07:55:15,014 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 07:55:15,014 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 07:55:15,014 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 07:55:15,014 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 07:55:15,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 07:55:15,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 07:55:15,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 07:55:15,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 07:55:15,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 07:55:15,016 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 07:55:15,086 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 07:55:15,087 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 07:55:15,561 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 07:55:15,571 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 07:55:15,572 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 07:55:15,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:55:15 BoogieIcfgContainer [2023-08-30 07:55:15,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 07:55:15,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 07:55:15,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 07:55:15,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 07:55:15,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:55:14" (1/3) ... [2023-08-30 07:55:15,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d6a0902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:55:15, skipping insertion in model container [2023-08-30 07:55:15,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:55:14" (2/3) ... [2023-08-30 07:55:15,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d6a0902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:55:15, skipping insertion in model container [2023-08-30 07:55:15,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:55:15" (3/3) ... [2023-08-30 07:55:15,580 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-5.wvr.c [2023-08-30 07:55:15,590 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 07:55:15,591 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-08-30 07:55:15,591 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 07:55:15,698 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 07:55:15,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 282 transitions, 580 flow [2023-08-30 07:55:15,807 INFO L130 PetriNetUnfolder]: 24/280 cut-off events. [2023-08-30 07:55:15,808 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:55:15,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 280 events. 24/280 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 662 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 185. Up to 2 conditions per place. [2023-08-30 07:55:15,815 INFO L82 GeneralOperation]: Start removeDead. Operand has 265 places, 282 transitions, 580 flow [2023-08-30 07:55:15,824 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 276 transitions, 564 flow [2023-08-30 07:55:15,827 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 07:55:15,843 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 259 places, 276 transitions, 564 flow [2023-08-30 07:55:15,863 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 259 places, 276 transitions, 564 flow [2023-08-30 07:55:15,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 276 transitions, 564 flow [2023-08-30 07:55:15,892 INFO L130 PetriNetUnfolder]: 24/276 cut-off events. [2023-08-30 07:55:15,892 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:55:15,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 276 events. 24/276 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 654 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 185. Up to 2 conditions per place. [2023-08-30 07:55:15,897 INFO L119 LiptonReduction]: Number of co-enabled transitions 9784 [2023-08-30 07:56:09,452 INFO L134 LiptonReduction]: Checked pairs total: 9546 [2023-08-30 07:56:09,452 INFO L136 LiptonReduction]: Total number of compositions: 338 [2023-08-30 07:56:09,461 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 07:56:09,465 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;@279751b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 07:56:09,465 INFO L358 AbstractCegarLoop]: Starting to check reachability of 54 error locations. [2023-08-30 07:56:09,469 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 07:56:09,470 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:56:09,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:09,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:56:09,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:56:09,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:09,473 INFO L85 PathProgramCache]: Analyzing trace with hash 38306, now seen corresponding path program 1 times [2023-08-30 07:56:09,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:56:09,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035559932] [2023-08-30 07:56:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:09,481 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:09,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:56:09,484 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:56:09,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 07:56:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:09,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:56:09,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:56:09,691 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:56:09,692 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 07:56:09,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:56:09,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:56:09,727 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:56:09,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035559932] [2023-08-30 07:56:09,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035559932] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:56:09,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:56:09,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:56:09,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746821131] [2023-08-30 07:56:09,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:56:09,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:56:09,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:56:09,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:56:09,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:56:09,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 620 [2023-08-30 07:56:09,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 255.66666666666666) internal successors, (767), 3 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:09,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:09,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 620 [2023-08-30 07:56:09,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:10,968 INFO L130 PetriNetUnfolder]: 2313/3184 cut-off events. [2023-08-30 07:56:10,968 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-08-30 07:56:10,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6420 conditions, 3184 events. 2313/3184 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 16964 event pairs, 1132 based on Foata normal form. 0/620 useless extension candidates. Maximal degree in co-relation 2778. Up to 1588 conditions per place. [2023-08-30 07:56:10,984 INFO L137 encePairwiseOnDemand]: 612/620 looper letters, 78 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-30 07:56:10,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 82 transitions, 348 flow [2023-08-30 07:56:10,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:56:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:56:10,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 856 transitions. [2023-08-30 07:56:10,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46021505376344085 [2023-08-30 07:56:10,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 856 transitions. [2023-08-30 07:56:10,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 856 transitions. [2023-08-30 07:56:10,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:10,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 856 transitions. [2023-08-30 07:56:11,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.3333333333333) internal successors, (856), 3 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:11,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:11,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:11,009 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 108 flow. Second operand 3 states and 856 transitions. [2023-08-30 07:56:11,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 82 transitions, 348 flow [2023-08-30 07:56:11,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 82 transitions, 332 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 07:56:11,015 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 102 flow [2023-08-30 07:56:11,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2023-08-30 07:56:11,019 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2023-08-30 07:56:11,019 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 102 flow [2023-08-30 07:56:11,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.66666666666666) internal successors, (767), 3 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:11,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:11,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:56:11,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 07:56:11,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:11,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:56:11,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:11,227 INFO L85 PathProgramCache]: Analyzing trace with hash 38391, now seen corresponding path program 1 times [2023-08-30 07:56:11,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:56:11,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058337138] [2023-08-30 07:56:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:11,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:11,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:56:11,230 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:56:11,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 07:56:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:11,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:56:11,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:56:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:56:11,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:56:11,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:56:11,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058337138] [2023-08-30 07:56:11,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058337138] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:56:11,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:56:11,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:56:11,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611743060] [2023-08-30 07:56:11,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:56:11,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:56:11,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:56:11,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:56:11,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:56:11,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 620 [2023-08-30 07:56:11,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:11,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:11,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 620 [2023-08-30 07:56:11,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:11,885 INFO L130 PetriNetUnfolder]: 1157/1595 cut-off events. [2023-08-30 07:56:11,885 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 07:56:11,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3199 conditions, 1595 events. 1157/1595 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 7781 event pairs, 566 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 3186. Up to 1588 conditions per place. [2023-08-30 07:56:11,891 INFO L137 encePairwiseOnDemand]: 615/620 looper letters, 41 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-30 07:56:11,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 190 flow [2023-08-30 07:56:11,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:56:11,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:56:11,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 814 transitions. [2023-08-30 07:56:11,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376344086021505 [2023-08-30 07:56:11,894 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 814 transitions. [2023-08-30 07:56:11,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 814 transitions. [2023-08-30 07:56:11,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:11,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 814 transitions. [2023-08-30 07:56:11,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:11,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:11,900 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:11,900 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 102 flow. Second operand 3 states and 814 transitions. [2023-08-30 07:56:11,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 190 flow [2023-08-30 07:56:11,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:56:11,902 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 112 flow [2023-08-30 07:56:11,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2023-08-30 07:56:11,903 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2023-08-30 07:56:11,904 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 112 flow [2023-08-30 07:56:11,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:11,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:11,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:56:11,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 07:56:12,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:12,113 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:56:12,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:12,114 INFO L85 PathProgramCache]: Analyzing trace with hash 38305, now seen corresponding path program 1 times [2023-08-30 07:56:12,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:56:12,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599681388] [2023-08-30 07:56:12,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:12,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:12,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:56:12,115 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:56:12,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 07:56:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:12,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:56:12,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:56:12,199 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 07:56:12,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 07:56:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:56:12,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:56:12,210 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:56:12,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [599681388] [2023-08-30 07:56:12,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [599681388] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:56:12,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:56:12,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:56:12,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373346258] [2023-08-30 07:56:12,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:56:12,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:56:12,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:56:12,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:56:12,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:56:12,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 620 [2023-08-30 07:56:12,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:12,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:12,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 620 [2023-08-30 07:56:12,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:12,752 INFO L130 PetriNetUnfolder]: 1157/1593 cut-off events. [2023-08-30 07:56:12,753 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 07:56:12,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3201 conditions, 1593 events. 1157/1593 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 7660 event pairs, 566 based on Foata normal form. 2/307 useless extension candidates. Maximal degree in co-relation 3187. Up to 1587 conditions per place. [2023-08-30 07:56:12,758 INFO L137 encePairwiseOnDemand]: 618/620 looper letters, 40 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-30 07:56:12,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 192 flow [2023-08-30 07:56:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:56:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:56:12,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 803 transitions. [2023-08-30 07:56:12,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43172043010752686 [2023-08-30 07:56:12,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 803 transitions. [2023-08-30 07:56:12,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 803 transitions. [2023-08-30 07:56:12,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:12,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 803 transitions. [2023-08-30 07:56:12,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.6666666666667) internal successors, (803), 3 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:12,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:12,766 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:12,766 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 112 flow. Second operand 3 states and 803 transitions. [2023-08-30 07:56:12,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 192 flow [2023-08-30 07:56:12,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 43 transitions, 186 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 07:56:12,768 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 106 flow [2023-08-30 07:56:12,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-08-30 07:56:12,769 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2023-08-30 07:56:12,769 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 106 flow [2023-08-30 07:56:12,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:12,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:12,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:56:12,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 07:56:12,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:12,978 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:56:12,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:12,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1190173, now seen corresponding path program 1 times [2023-08-30 07:56:12,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:56:12,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797896974] [2023-08-30 07:56:12,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:12,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:12,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:56:12,981 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:56:12,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 07:56:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:13,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:56:13,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:56:13,069 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:56:13,069 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 07:56:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:56:13,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:56:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:56:13,265 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:56:13,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797896974] [2023-08-30 07:56:13,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797896974] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:56:13,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:56:13,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 07:56:13,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576014275] [2023-08-30 07:56:13,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:56:13,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:56:13,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:56:13,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:56:13,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:56:14,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 620 [2023-08-30 07:56:14,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:14,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:14,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 620 [2023-08-30 07:56:14,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:15,363 INFO L130 PetriNetUnfolder]: 2319/3191 cut-off events. [2023-08-30 07:56:15,363 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:56:15,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6407 conditions, 3191 events. 2319/3191 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 17116 event pairs, 1132 based on Foata normal form. 0/627 useless extension candidates. Maximal degree in co-relation 6398. Up to 1590 conditions per place. [2023-08-30 07:56:15,372 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 76 selfloop transitions, 11 changer transitions 0/89 dead transitions. [2023-08-30 07:56:15,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 89 transitions, 400 flow [2023-08-30 07:56:15,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:56:15,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:56:15,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1584 transitions. [2023-08-30 07:56:15,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2023-08-30 07:56:15,377 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1584 transitions. [2023-08-30 07:56:15,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1584 transitions. [2023-08-30 07:56:15,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:15,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1584 transitions. [2023-08-30 07:56:15,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:15,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 620.0) internal successors, (4340), 7 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:15,385 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 620.0) internal successors, (4340), 7 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:15,385 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 106 flow. Second operand 6 states and 1584 transitions. [2023-08-30 07:56:15,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 89 transitions, 400 flow [2023-08-30 07:56:15,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 89 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:56:15,388 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 203 flow [2023-08-30 07:56:15,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=203, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2023-08-30 07:56:15,389 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2023-08-30 07:56:15,389 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 203 flow [2023-08-30 07:56:15,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:15,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:15,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:56:15,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 07:56:15,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:15,593 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:56:15,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:15,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1190258, now seen corresponding path program 1 times [2023-08-30 07:56:15,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:56:15,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12831717] [2023-08-30 07:56:15,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:15,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:15,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:56:15,596 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:56:15,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 07:56:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:15,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:56:15,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:56:15,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:56:15,708 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-08-30 07:56:15,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 26 [2023-08-30 07:56:15,723 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 07:56:15,794 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 07:56:15,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:56:15,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:56:15,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12831717] [2023-08-30 07:56:15,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12831717] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:56:15,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:56:15,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:56:15,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901420960] [2023-08-30 07:56:15,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:56:15,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:56:15,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:56:15,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:56:15,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:56:15,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 620 [2023-08-30 07:56:15,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:15,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:15,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 620 [2023-08-30 07:56:15,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:16,491 INFO L130 PetriNetUnfolder]: 1735/2435 cut-off events. [2023-08-30 07:56:16,491 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 07:56:16,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4923 conditions, 2435 events. 1735/2435 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 12965 event pairs, 846 based on Foata normal form. 0/535 useless extension candidates. Maximal degree in co-relation 4909. Up to 2423 conditions per place. [2023-08-30 07:56:16,502 INFO L137 encePairwiseOnDemand]: 617/620 looper letters, 45 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-08-30 07:56:16,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 48 transitions, 269 flow [2023-08-30 07:56:16,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:56:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:56:16,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 802 transitions. [2023-08-30 07:56:16,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4311827956989247 [2023-08-30 07:56:16,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 802 transitions. [2023-08-30 07:56:16,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 802 transitions. [2023-08-30 07:56:16,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:16,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 802 transitions. [2023-08-30 07:56:16,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:16,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:16,510 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:16,510 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 203 flow. Second operand 3 states and 802 transitions. [2023-08-30 07:56:16,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 48 transitions, 269 flow [2023-08-30 07:56:16,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 48 transitions, 251 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 07:56:16,514 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 161 flow [2023-08-30 07:56:16,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=161, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-08-30 07:56:16,516 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2023-08-30 07:56:16,516 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 161 flow [2023-08-30 07:56:16,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:16,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:16,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:56:16,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 07:56:16,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:16,724 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:56:16,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:16,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1190259, now seen corresponding path program 1 times [2023-08-30 07:56:16,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:56:16,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905580569] [2023-08-30 07:56:16,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:16,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:16,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:56:16,742 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:56:16,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 07:56:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:16,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 07:56:16,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:56:16,879 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2023-08-30 07:56:16,879 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 33 [2023-08-30 07:56:16,895 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 07:56:16,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:56:16,896 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:56:16,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905580569] [2023-08-30 07:56:16,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905580569] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:56:16,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:56:16,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:56:16,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440581172] [2023-08-30 07:56:16,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:56:16,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:56:16,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:56:16,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:56:16,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:56:17,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 620 [2023-08-30 07:56:17,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:17,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:17,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 620 [2023-08-30 07:56:17,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:17,461 INFO L130 PetriNetUnfolder]: 1151/1679 cut-off events. [2023-08-30 07:56:17,461 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 07:56:17,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3394 conditions, 1679 events. 1151/1679 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 9009 event pairs, 560 based on Foata normal form. 0/457 useless extension candidates. Maximal degree in co-relation 3379. Up to 1667 conditions per place. [2023-08-30 07:56:17,466 INFO L137 encePairwiseOnDemand]: 617/620 looper letters, 41 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-30 07:56:17,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 44 transitions, 223 flow [2023-08-30 07:56:17,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:56:17,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:56:17,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 791 transitions. [2023-08-30 07:56:17,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252688172043011 [2023-08-30 07:56:17,471 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 791 transitions. [2023-08-30 07:56:17,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 791 transitions. [2023-08-30 07:56:17,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:17,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 791 transitions. [2023-08-30 07:56:17,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.6666666666667) internal successors, (791), 3 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:17,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:17,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:17,487 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 161 flow. Second operand 3 states and 791 transitions. [2023-08-30 07:56:17,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 44 transitions, 223 flow [2023-08-30 07:56:17,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 44 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:56:17,488 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 140 flow [2023-08-30 07:56:17,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-08-30 07:56:17,488 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-08-30 07:56:17,488 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 140 flow [2023-08-30 07:56:17,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:17,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:17,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:56:17,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 07:56:17,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:17,696 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:56:17,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:17,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1143863866, now seen corresponding path program 1 times [2023-08-30 07:56:17,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:56:17,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120624644] [2023-08-30 07:56:17,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:17,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:17,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:56:17,698 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:56:17,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 07:56:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:17,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 07:56:17,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:56:17,790 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 07:56:17,790 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 07:56:17,809 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 07:56:17,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:56:17,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:56:17,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120624644] [2023-08-30 07:56:17,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120624644] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:56:17,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:56:17,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:56:17,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508467219] [2023-08-30 07:56:17,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:56:17,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:56:17,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:56:17,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:56:17,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:56:17,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 620 [2023-08-30 07:56:17,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:17,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:17,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 620 [2023-08-30 07:56:17,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:18,363 INFO L130 PetriNetUnfolder]: 1073/1557 cut-off events. [2023-08-30 07:56:18,363 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 07:56:18,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3151 conditions, 1557 events. 1073/1557 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 8262 event pairs, 522 based on Foata normal form. 0/449 useless extension candidates. Maximal degree in co-relation 3135. Up to 1545 conditions per place. [2023-08-30 07:56:18,368 INFO L137 encePairwiseOnDemand]: 617/620 looper letters, 39 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-08-30 07:56:18,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 216 flow [2023-08-30 07:56:18,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:56:18,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:56:18,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 789 transitions. [2023-08-30 07:56:18,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4241935483870968 [2023-08-30 07:56:18,370 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 789 transitions. [2023-08-30 07:56:18,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 789 transitions. [2023-08-30 07:56:18,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:18,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 789 transitions. [2023-08-30 07:56:18,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:18,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:18,374 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:18,374 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 140 flow. Second operand 3 states and 789 transitions. [2023-08-30 07:56:18,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 216 flow [2023-08-30 07:56:18,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 42 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:56:18,375 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 137 flow [2023-08-30 07:56:18,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-08-30 07:56:18,376 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2023-08-30 07:56:18,376 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 137 flow [2023-08-30 07:56:18,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:18,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:18,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:56:18,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 07:56:18,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:18,586 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:56:18,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:18,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1143863865, now seen corresponding path program 1 times [2023-08-30 07:56:18,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:56:18,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221859445] [2023-08-30 07:56:18,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:18,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:18,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:56:18,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:56:18,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 07:56:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:18,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 07:56:18,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:56:18,698 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:56:18,698 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 07:56:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:56:18,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:56:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:56:18,963 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:56:18,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221859445] [2023-08-30 07:56:18,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221859445] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:56:18,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:56:18,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 07:56:18,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100630205] [2023-08-30 07:56:18,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:56:18,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:56:18,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:56:18,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:56:18,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:56:20,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 620 [2023-08-30 07:56:20,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 137 flow. Second operand has 8 states, 8 states have (on average 246.25) internal successors, (1970), 8 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:20,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:20,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 620 [2023-08-30 07:56:20,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:21,021 INFO L130 PetriNetUnfolder]: 995/1435 cut-off events. [2023-08-30 07:56:21,021 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 07:56:21,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2908 conditions, 1435 events. 995/1435 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 7351 event pairs, 484 based on Foata normal form. 0/446 useless extension candidates. Maximal degree in co-relation 2891. Up to 714 conditions per place. [2023-08-30 07:56:21,027 INFO L137 encePairwiseOnDemand]: 616/620 looper letters, 64 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-08-30 07:56:21,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 69 transitions, 335 flow [2023-08-30 07:56:21,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:56:21,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:56:21,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1292 transitions. [2023-08-30 07:56:21,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4167741935483871 [2023-08-30 07:56:21,033 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1292 transitions. [2023-08-30 07:56:21,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1292 transitions. [2023-08-30 07:56:21,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:21,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1292 transitions. [2023-08-30 07:56:21,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 258.4) internal successors, (1292), 5 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:21,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:21,040 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:21,040 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 137 flow. Second operand 5 states and 1292 transitions. [2023-08-30 07:56:21,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 69 transitions, 335 flow [2023-08-30 07:56:21,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 69 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:56:21,042 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 138 flow [2023-08-30 07:56:21,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2023-08-30 07:56:21,044 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-08-30 07:56:21,044 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 138 flow [2023-08-30 07:56:21,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 246.25) internal successors, (1970), 8 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:21,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:21,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:56:21,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 07:56:21,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:21,254 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:56:21,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:21,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1100030081, now seen corresponding path program 1 times [2023-08-30 07:56:21,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:56:21,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736562791] [2023-08-30 07:56:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:21,255 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:21,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:56:21,256 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:56:21,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 07:56:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:21,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:56:21,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:56:21,339 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 07:56:21,340 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 07:56:21,356 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 07:56:21,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:56:21,356 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:56:21,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736562791] [2023-08-30 07:56:21,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736562791] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:56:21,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:56:21,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:56:21,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284896044] [2023-08-30 07:56:21,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:56:21,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:56:21,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:56:21,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:56:21,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:56:21,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 620 [2023-08-30 07:56:21,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 233.25) internal successors, (933), 4 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:21,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:21,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 620 [2023-08-30 07:56:21,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:21,919 INFO L130 PetriNetUnfolder]: 555/823 cut-off events. [2023-08-30 07:56:21,919 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 07:56:21,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1687 conditions, 823 events. 555/823 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 3964 event pairs, 266 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 1669. Up to 806 conditions per place. [2023-08-30 07:56:21,923 INFO L137 encePairwiseOnDemand]: 612/620 looper letters, 28 selfloop transitions, 4 changer transitions 0/34 dead transitions. [2023-08-30 07:56:21,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 34 transitions, 190 flow [2023-08-30 07:56:21,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:56:21,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:56:21,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 960 transitions. [2023-08-30 07:56:21,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2023-08-30 07:56:21,928 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 960 transitions. [2023-08-30 07:56:21,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 960 transitions. [2023-08-30 07:56:21,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:21,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 960 transitions. [2023-08-30 07:56:21,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:21,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 620.0) internal successors, (3100), 5 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:21,935 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 620.0) internal successors, (3100), 5 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:21,935 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 138 flow. Second operand 4 states and 960 transitions. [2023-08-30 07:56:21,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 34 transitions, 190 flow [2023-08-30 07:56:21,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 34 transitions, 185 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 07:56:21,936 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 129 flow [2023-08-30 07:56:21,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2023-08-30 07:56:21,937 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2023-08-30 07:56:21,937 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 129 flow [2023-08-30 07:56:21,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 233.25) internal successors, (933), 4 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:21,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:21,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:56:21,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 07:56:22,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:22,138 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:56:22,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:22,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1100030079, now seen corresponding path program 1 times [2023-08-30 07:56:22,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:56:22,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943368279] [2023-08-30 07:56:22,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:22,139 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:22,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:56:22,140 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:56:22,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 07:56:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:22,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:56:22,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:56:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:56:22,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:56:22,335 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 35 treesize of output 31 [2023-08-30 07:56:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:56:22,402 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:56:22,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943368279] [2023-08-30 07:56:22,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943368279] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:56:22,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:56:22,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 07:56:22,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029499852] [2023-08-30 07:56:22,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:56:22,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:56:22,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:56:22,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:56:22,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:56:23,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 620 [2023-08-30 07:56:23,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 129 flow. Second operand has 8 states, 8 states have (on average 247.25) internal successors, (1978), 8 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:23,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:23,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 620 [2023-08-30 07:56:23,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:25,088 INFO L130 PetriNetUnfolder]: 713/1087 cut-off events. [2023-08-30 07:56:25,088 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2023-08-30 07:56:25,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2224 conditions, 1087 events. 713/1087 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 5537 event pairs, 200 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 2206. Up to 695 conditions per place. [2023-08-30 07:56:25,092 INFO L137 encePairwiseOnDemand]: 615/620 looper letters, 65 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2023-08-30 07:56:25,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 76 transitions, 376 flow [2023-08-30 07:56:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 07:56:25,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 07:56:25,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1794 transitions. [2023-08-30 07:56:25,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4133640552995392 [2023-08-30 07:56:25,098 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1794 transitions. [2023-08-30 07:56:25,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1794 transitions. [2023-08-30 07:56:25,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:25,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1794 transitions. [2023-08-30 07:56:25,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 256.2857142857143) internal successors, (1794), 7 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:25,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 620.0) internal successors, (4960), 8 states have internal predecessors, (4960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:25,121 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 620.0) internal successors, (4960), 8 states have internal predecessors, (4960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:25,121 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 129 flow. Second operand 7 states and 1794 transitions. [2023-08-30 07:56:25,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 76 transitions, 376 flow [2023-08-30 07:56:25,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 76 transitions, 370 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:56:25,123 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 167 flow [2023-08-30 07:56:25,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=167, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2023-08-30 07:56:25,125 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-08-30 07:56:25,125 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 167 flow [2023-08-30 07:56:25,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 247.25) internal successors, (1978), 8 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:25,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:25,126 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 07:56:25,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 07:56:25,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:25,336 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:56:25,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:25,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1099373666, now seen corresponding path program 2 times [2023-08-30 07:56:25,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:56:25,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040888724] [2023-08-30 07:56:25,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:56:25,337 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:25,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:56:25,338 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:56:25,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 07:56:25,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:56:25,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:56:25,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:56:25,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:56:25,445 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:56:25,446 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 07:56:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:56:25,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:56:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:56:25,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:56:25,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040888724] [2023-08-30 07:56:25,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040888724] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:56:25,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:56:25,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:56:25,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996384313] [2023-08-30 07:56:25,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:56:25,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:56:25,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:56:25,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:56:25,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:56:30,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 620 [2023-08-30 07:56:30,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 167 flow. Second operand has 12 states, 12 states have (on average 251.0) internal successors, (3012), 12 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:30,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:30,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 620 [2023-08-30 07:56:30,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:35,495 INFO L130 PetriNetUnfolder]: 2972/4640 cut-off events. [2023-08-30 07:56:35,495 INFO L131 PetriNetUnfolder]: For 1170/1170 co-relation queries the response was YES. [2023-08-30 07:56:35,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10502 conditions, 4640 events. 2972/4640 cut-off events. For 1170/1170 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 29991 event pairs, 1719 based on Foata normal form. 6/2481 useless extension candidates. Maximal degree in co-relation 10482. Up to 511 conditions per place. [2023-08-30 07:56:35,507 INFO L137 encePairwiseOnDemand]: 616/620 looper letters, 218 selfloop transitions, 12 changer transitions 0/232 dead transitions. [2023-08-30 07:56:35,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 232 transitions, 1190 flow [2023-08-30 07:56:35,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:56:35,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:56:35,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3227 transitions. [2023-08-30 07:56:35,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4337365591397849 [2023-08-30 07:56:35,514 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3227 transitions. [2023-08-30 07:56:35,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3227 transitions. [2023-08-30 07:56:35,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:35,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3227 transitions. [2023-08-30 07:56:35,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 268.9166666666667) internal successors, (3227), 12 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:35,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 620.0) internal successors, (8060), 13 states have internal predecessors, (8060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:35,526 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 620.0) internal successors, (8060), 13 states have internal predecessors, (8060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:35,526 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 167 flow. Second operand 12 states and 3227 transitions. [2023-08-30 07:56:35,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 232 transitions, 1190 flow [2023-08-30 07:56:35,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 232 transitions, 1174 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 07:56:35,529 INFO L231 Difference]: Finished difference. Result has 68 places, 44 transitions, 253 flow [2023-08-30 07:56:35,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=253, PETRI_PLACES=68, PETRI_TRANSITIONS=44} [2023-08-30 07:56:35,530 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 16 predicate places. [2023-08-30 07:56:35,530 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 44 transitions, 253 flow [2023-08-30 07:56:35,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 251.0) internal successors, (3012), 12 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:35,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:35,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:56:35,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 07:56:35,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:35,738 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:56:35,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:35,738 INFO L85 PathProgramCache]: Analyzing trace with hash -258804763, now seen corresponding path program 1 times [2023-08-30 07:56:35,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:56:35,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307022069] [2023-08-30 07:56:35,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:35,739 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:35,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:56:35,740 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:56:35,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 07:56:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:35,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 07:56:35,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:56:35,863 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:56:35,864 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 07:56:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:56:35,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:56:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:56:36,528 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:56:36,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307022069] [2023-08-30 07:56:36,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307022069] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:56:36,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:56:36,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 07:56:36,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942491128] [2023-08-30 07:56:36,528 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:56:36,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:56:36,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:56:36,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:56:36,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:56:44,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 620 [2023-08-30 07:56:44,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 44 transitions, 253 flow. Second operand has 8 states, 8 states have (on average 246.5) internal successors, (1972), 8 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:44,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:44,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 620 [2023-08-30 07:56:44,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:48,411 INFO L130 PetriNetUnfolder]: 2153/3419 cut-off events. [2023-08-30 07:56:48,412 INFO L131 PetriNetUnfolder]: For 921/921 co-relation queries the response was YES. [2023-08-30 07:56:48,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7776 conditions, 3419 events. 2153/3419 cut-off events. For 921/921 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 21190 event pairs, 1236 based on Foata normal form. 21/1936 useless extension candidates. Maximal degree in co-relation 7749. Up to 3055 conditions per place. [2023-08-30 07:56:48,420 INFO L137 encePairwiseOnDemand]: 606/620 looper letters, 56 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2023-08-30 07:56:48,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 69 transitions, 452 flow [2023-08-30 07:56:48,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 07:56:48,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 07:56:48,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2282 transitions. [2023-08-30 07:56:48,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4089605734767025 [2023-08-30 07:56:48,434 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2282 transitions. [2023-08-30 07:56:48,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2282 transitions. [2023-08-30 07:56:48,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:48,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2282 transitions. [2023-08-30 07:56:48,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 253.55555555555554) internal successors, (2282), 9 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:48,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 620.0) internal successors, (6200), 10 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:48,443 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 620.0) internal successors, (6200), 10 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:48,443 INFO L175 Difference]: Start difference. First operand has 68 places, 44 transitions, 253 flow. Second operand 9 states and 2282 transitions. [2023-08-30 07:56:48,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 69 transitions, 452 flow [2023-08-30 07:56:48,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 69 transitions, 427 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 07:56:48,445 INFO L231 Difference]: Finished difference. Result has 74 places, 44 transitions, 293 flow [2023-08-30 07:56:48,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=293, PETRI_PLACES=74, PETRI_TRANSITIONS=44} [2023-08-30 07:56:48,446 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2023-08-30 07:56:48,446 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 44 transitions, 293 flow [2023-08-30 07:56:48,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 246.5) internal successors, (1972), 8 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:48,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:48,447 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 07:56:48,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 07:56:48,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:48,654 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:56:48,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:48,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1138574166, now seen corresponding path program 2 times [2023-08-30 07:56:48,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:56:48,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705392655] [2023-08-30 07:56:48,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:56:48,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:48,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:56:48,657 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:56:48,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 07:56:48,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 07:56:48,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:56:48,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 07:56:48,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:56:48,767 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:56:48,768 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 07:56:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 07:56:48,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:56:48,852 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:56:48,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705392655] [2023-08-30 07:56:48,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705392655] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:56:48,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:56:48,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:56:48,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556372976] [2023-08-30 07:56:48,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:56:48,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:56:48,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:56:48,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:56:48,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:56:49,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 620 [2023-08-30 07:56:49,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 44 transitions, 293 flow. Second operand has 4 states, 4 states have (on average 252.5) internal successors, (1010), 4 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:49,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:49,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 620 [2023-08-30 07:56:49,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:49,626 INFO L130 PetriNetUnfolder]: 515/977 cut-off events. [2023-08-30 07:56:49,626 INFO L131 PetriNetUnfolder]: For 955/955 co-relation queries the response was YES. [2023-08-30 07:56:49,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2262 conditions, 977 events. 515/977 cut-off events. For 955/955 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5377 event pairs, 270 based on Foata normal form. 138/899 useless extension candidates. Maximal degree in co-relation 2232. Up to 919 conditions per place. [2023-08-30 07:56:49,629 INFO L137 encePairwiseOnDemand]: 608/620 looper letters, 26 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2023-08-30 07:56:49,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 34 transitions, 293 flow [2023-08-30 07:56:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:56:49,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:56:49,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1030 transitions. [2023-08-30 07:56:49,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153225806451613 [2023-08-30 07:56:49,643 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1030 transitions. [2023-08-30 07:56:49,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1030 transitions. [2023-08-30 07:56:49,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:49,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1030 transitions. [2023-08-30 07:56:49,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 257.5) internal successors, (1030), 4 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:49,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 620.0) internal successors, (3100), 5 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:49,647 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 620.0) internal successors, (3100), 5 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:49,647 INFO L175 Difference]: Start difference. First operand has 74 places, 44 transitions, 293 flow. Second operand 4 states and 1030 transitions. [2023-08-30 07:56:49,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 34 transitions, 293 flow [2023-08-30 07:56:49,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 34 transitions, 246 flow, removed 6 selfloop flow, removed 12 redundant places. [2023-08-30 07:56:49,649 INFO L231 Difference]: Finished difference. Result has 55 places, 34 transitions, 194 flow [2023-08-30 07:56:49,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=55, PETRI_TRANSITIONS=34} [2023-08-30 07:56:49,650 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2023-08-30 07:56:49,650 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 34 transitions, 194 flow [2023-08-30 07:56:49,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 252.5) internal successors, (1010), 4 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:49,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:49,651 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 07:56:49,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 07:56:49,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:49,860 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:56:49,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:49,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1326886270, now seen corresponding path program 3 times [2023-08-30 07:56:49,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:56:49,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281294320] [2023-08-30 07:56:49,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:56:49,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:56:49,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:56:49,862 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:56:49,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 07:56:49,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 07:56:49,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:56:49,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 07:56:49,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:56:50,044 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:56:50,045 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 07:56:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:56:50,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:56:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:56:52,300 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:56:52,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281294320] [2023-08-30 07:56:52,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281294320] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:56:52,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:56:52,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 07:56:52,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313021446] [2023-08-30 07:56:52,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:56:52,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 07:56:52,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:56:52,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 07:56:52,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 07:57:10,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 620 [2023-08-30 07:57:10,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 34 transitions, 194 flow. Second operand has 24 states, 24 states have (on average 250.0) internal successors, (6000), 24 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:10,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:10,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 620 [2023-08-30 07:57:10,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:26,850 INFO L130 PetriNetUnfolder]: 1199/2273 cut-off events. [2023-08-30 07:57:26,851 INFO L131 PetriNetUnfolder]: For 753/753 co-relation queries the response was YES. [2023-08-30 07:57:26,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5037 conditions, 2273 events. 1199/2273 cut-off events. For 753/753 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 13353 event pairs, 630 based on Foata normal form. 12/1861 useless extension candidates. Maximal degree in co-relation 5014. Up to 504 conditions per place. [2023-08-30 07:57:26,857 INFO L137 encePairwiseOnDemand]: 616/620 looper letters, 295 selfloop transitions, 25 changer transitions 0/322 dead transitions. [2023-08-30 07:57:26,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 322 transitions, 1810 flow [2023-08-30 07:57:26,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 07:57:26,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 07:57:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6536 transitions. [2023-08-30 07:57:26,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216774193548387 [2023-08-30 07:57:26,867 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6536 transitions. [2023-08-30 07:57:26,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6536 transitions. [2023-08-30 07:57:26,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:26,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6536 transitions. [2023-08-30 07:57:26,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 261.44) internal successors, (6536), 25 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:26,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 620.0) internal successors, (16120), 26 states have internal predecessors, (16120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:26,902 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 620.0) internal successors, (16120), 26 states have internal predecessors, (16120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:26,902 INFO L175 Difference]: Start difference. First operand has 55 places, 34 transitions, 194 flow. Second operand 25 states and 6536 transitions. [2023-08-30 07:57:26,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 322 transitions, 1810 flow [2023-08-30 07:57:26,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 322 transitions, 1786 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:57:26,907 INFO L231 Difference]: Finished difference. Result has 78 places, 47 transitions, 330 flow [2023-08-30 07:57:26,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=330, PETRI_PLACES=78, PETRI_TRANSITIONS=47} [2023-08-30 07:57:26,907 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 26 predicate places. [2023-08-30 07:57:26,907 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 47 transitions, 330 flow [2023-08-30 07:57:26,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 250.0) internal successors, (6000), 24 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:26,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:26,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:26,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 07:57:27,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:27,117 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:57:27,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:27,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1178195579, now seen corresponding path program 1 times [2023-08-30 07:57:27,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:57:27,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7173531] [2023-08-30 07:57:27,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:27,118 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:27,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:57:27,119 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:57:27,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 07:57:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:57:27,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:57:27,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:27,264 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 07:57:27,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:57:27,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:57:27,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7173531] [2023-08-30 07:57:27,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7173531] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:57:27,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:57:27,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 07:57:27,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626219806] [2023-08-30 07:57:27,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:57:27,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:57:27,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:57:27,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:57:27,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:57:27,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 620 [2023-08-30 07:57:27,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 47 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:27,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:27,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 620 [2023-08-30 07:57:27,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:27,998 INFO L130 PetriNetUnfolder]: 1493/2798 cut-off events. [2023-08-30 07:57:27,998 INFO L131 PetriNetUnfolder]: For 370/370 co-relation queries the response was YES. [2023-08-30 07:57:28,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6295 conditions, 2798 events. 1493/2798 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 15690 event pairs, 504 based on Foata normal form. 0/2504 useless extension candidates. Maximal degree in co-relation 6271. Up to 1560 conditions per place. [2023-08-30 07:57:28,004 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 62 selfloop transitions, 6 changer transitions 0/68 dead transitions. [2023-08-30 07:57:28,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 68 transitions, 513 flow [2023-08-30 07:57:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:57:28,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:57:28,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1236 transitions. [2023-08-30 07:57:28,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3987096774193548 [2023-08-30 07:57:28,007 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1236 transitions. [2023-08-30 07:57:28,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1236 transitions. [2023-08-30 07:57:28,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:28,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1236 transitions. [2023-08-30 07:57:28,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 247.2) internal successors, (1236), 5 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:28,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:28,012 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:28,012 INFO L175 Difference]: Start difference. First operand has 78 places, 47 transitions, 330 flow. Second operand 5 states and 1236 transitions. [2023-08-30 07:57:28,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 68 transitions, 513 flow [2023-08-30 07:57:28,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 437 flow, removed 21 selfloop flow, removed 16 redundant places. [2023-08-30 07:57:28,014 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 289 flow [2023-08-30 07:57:28,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=289, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2023-08-30 07:57:28,015 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 17 predicate places. [2023-08-30 07:57:28,015 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 289 flow [2023-08-30 07:57:28,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:28,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:28,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:28,025 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 07:57:28,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:28,226 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:57:28,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:28,226 INFO L85 PathProgramCache]: Analyzing trace with hash -86607835, now seen corresponding path program 2 times [2023-08-30 07:57:28,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:57:28,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788234906] [2023-08-30 07:57:28,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:57:28,226 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:28,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:57:28,227 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:57:28,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 07:57:28,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 07:57:28,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:57:28,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:57:28,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:28,395 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 07:57:28,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:57:28,395 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:57:28,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788234906] [2023-08-30 07:57:28,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788234906] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:57:28,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:57:28,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 07:57:28,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247892534] [2023-08-30 07:57:28,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:57:28,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:57:28,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:57:28,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:57:28,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:57:28,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 620 [2023-08-30 07:57:28,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 289 flow. Second operand has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:28,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:28,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 620 [2023-08-30 07:57:28,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:29,431 INFO L130 PetriNetUnfolder]: 2203/4127 cut-off events. [2023-08-30 07:57:29,432 INFO L131 PetriNetUnfolder]: For 3062/3062 co-relation queries the response was YES. [2023-08-30 07:57:29,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12239 conditions, 4127 events. 2203/4127 cut-off events. For 3062/3062 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 25114 event pairs, 840 based on Foata normal form. 40/3607 useless extension candidates. Maximal degree in co-relation 12218. Up to 2608 conditions per place. [2023-08-30 07:57:29,441 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 67 selfloop transitions, 8 changer transitions 0/75 dead transitions. [2023-08-30 07:57:29,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 75 transitions, 548 flow [2023-08-30 07:57:29,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:57:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:57:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1247 transitions. [2023-08-30 07:57:29,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40225806451612905 [2023-08-30 07:57:29,445 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1247 transitions. [2023-08-30 07:57:29,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1247 transitions. [2023-08-30 07:57:29,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:29,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1247 transitions. [2023-08-30 07:57:29,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 249.4) internal successors, (1247), 5 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:29,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:29,449 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:29,449 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 289 flow. Second operand 5 states and 1247 transitions. [2023-08-30 07:57:29,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 75 transitions, 548 flow [2023-08-30 07:57:29,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 75 transitions, 515 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-30 07:57:29,463 INFO L231 Difference]: Finished difference. Result has 74 places, 55 transitions, 336 flow [2023-08-30 07:57:29,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=336, PETRI_PLACES=74, PETRI_TRANSITIONS=55} [2023-08-30 07:57:29,463 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2023-08-30 07:57:29,464 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 55 transitions, 336 flow [2023-08-30 07:57:29,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:29,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:29,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:29,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-08-30 07:57:29,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:29,672 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:57:29,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:29,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1995533091, now seen corresponding path program 3 times [2023-08-30 07:57:29,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:57:29,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173675974] [2023-08-30 07:57:29,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:57:29,673 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:29,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:57:29,673 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:57:29,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 07:57:29,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 07:57:29,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:57:29,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:57:29,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:29,814 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 07:57:29,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:57:29,814 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:57:29,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173675974] [2023-08-30 07:57:29,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173675974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:57:29,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:57:29,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 07:57:29,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023805696] [2023-08-30 07:57:29,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:57:29,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:57:29,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:57:29,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:57:29,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:57:29,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 620 [2023-08-30 07:57:29,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 55 transitions, 336 flow. Second operand has 5 states, 5 states have (on average 241.0) internal successors, (1205), 5 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:29,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:29,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 620 [2023-08-30 07:57:29,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:30,961 INFO L130 PetriNetUnfolder]: 2403/4447 cut-off events. [2023-08-30 07:57:30,961 INFO L131 PetriNetUnfolder]: For 6731/6731 co-relation queries the response was YES. [2023-08-30 07:57:30,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15880 conditions, 4447 events. 2403/4447 cut-off events. For 6731/6731 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 27171 event pairs, 880 based on Foata normal form. 80/4247 useless extension candidates. Maximal degree in co-relation 15857. Up to 2368 conditions per place. [2023-08-30 07:57:30,972 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 64 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2023-08-30 07:57:30,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 79 transitions, 601 flow [2023-08-30 07:57:30,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:57:30,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:57:30,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1232 transitions. [2023-08-30 07:57:30,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39741935483870966 [2023-08-30 07:57:30,975 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1232 transitions. [2023-08-30 07:57:30,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1232 transitions. [2023-08-30 07:57:30,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:30,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1232 transitions. [2023-08-30 07:57:30,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 246.4) internal successors, (1232), 5 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:30,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:30,979 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:30,980 INFO L175 Difference]: Start difference. First operand has 74 places, 55 transitions, 336 flow. Second operand 5 states and 1232 transitions. [2023-08-30 07:57:30,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 79 transitions, 601 flow [2023-08-30 07:57:30,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 79 transitions, 577 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 07:57:30,993 INFO L231 Difference]: Finished difference. Result has 80 places, 62 transitions, 432 flow [2023-08-30 07:57:30,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=432, PETRI_PLACES=80, PETRI_TRANSITIONS=62} [2023-08-30 07:57:30,994 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 28 predicate places. [2023-08-30 07:57:30,994 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 62 transitions, 432 flow [2023-08-30 07:57:30,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 241.0) internal successors, (1205), 5 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:30,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:30,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:31,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 07:57:31,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:31,203 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:57:31,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:31,203 INFO L85 PathProgramCache]: Analyzing trace with hash 333624601, now seen corresponding path program 4 times [2023-08-30 07:57:31,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:57:31,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220761112] [2023-08-30 07:57:31,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:57:31,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:31,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:57:31,204 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:57:31,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 07:57:31,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:57:31,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:57:31,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:57:31,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:31,365 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 07:57:31,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:57:31,365 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:57:31,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220761112] [2023-08-30 07:57:31,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220761112] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:57:31,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:57:31,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 07:57:31,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557563117] [2023-08-30 07:57:31,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:57:31,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:57:31,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:57:31,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:57:31,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:57:31,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 620 [2023-08-30 07:57:31,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 62 transitions, 432 flow. Second operand has 5 states, 5 states have (on average 241.0) internal successors, (1205), 5 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:31,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:31,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 620 [2023-08-30 07:57:31,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:32,380 INFO L130 PetriNetUnfolder]: 2323/4367 cut-off events. [2023-08-30 07:57:32,380 INFO L131 PetriNetUnfolder]: For 11618/11618 co-relation queries the response was YES. [2023-08-30 07:57:32,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17083 conditions, 4367 events. 2323/4367 cut-off events. For 11618/11618 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 26632 event pairs, 1000 based on Foata normal form. 80/4167 useless extension candidates. Maximal degree in co-relation 17057. Up to 3488 conditions per place. [2023-08-30 07:57:32,395 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 62 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2023-08-30 07:57:32,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 78 transitions, 677 flow [2023-08-30 07:57:32,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:57:32,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:57:32,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1226 transitions. [2023-08-30 07:57:32,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39548387096774196 [2023-08-30 07:57:32,398 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1226 transitions. [2023-08-30 07:57:32,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1226 transitions. [2023-08-30 07:57:32,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:32,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1226 transitions. [2023-08-30 07:57:32,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 245.2) internal successors, (1226), 5 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:32,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:32,402 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:32,402 INFO L175 Difference]: Start difference. First operand has 80 places, 62 transitions, 432 flow. Second operand 5 states and 1226 transitions. [2023-08-30 07:57:32,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 78 transitions, 677 flow [2023-08-30 07:57:32,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 78 transitions, 658 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 07:57:32,429 INFO L231 Difference]: Finished difference. Result has 85 places, 69 transitions, 536 flow [2023-08-30 07:57:32,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=536, PETRI_PLACES=85, PETRI_TRANSITIONS=69} [2023-08-30 07:57:32,429 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 33 predicate places. [2023-08-30 07:57:32,430 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 69 transitions, 536 flow [2023-08-30 07:57:32,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 241.0) internal successors, (1205), 5 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:32,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:32,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:32,438 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 07:57:32,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:32,630 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:57:32,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:32,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1933617035, now seen corresponding path program 5 times [2023-08-30 07:57:32,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:57:32,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675435730] [2023-08-30 07:57:32,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:57:32,631 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:32,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:57:32,632 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:57:32,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 07:57:32,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:57:32,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:57:32,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:57:32,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:32,855 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 07:57:32,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:57:32,856 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:57:32,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675435730] [2023-08-30 07:57:32,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675435730] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:57:32,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:57:32,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 07:57:32,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758244083] [2023-08-30 07:57:32,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:57:32,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:57:32,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:57:32,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:57:32,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:57:32,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 620 [2023-08-30 07:57:32,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 69 transitions, 536 flow. Second operand has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:32,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:32,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 620 [2023-08-30 07:57:32,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:33,846 INFO L130 PetriNetUnfolder]: 2343/4427 cut-off events. [2023-08-30 07:57:33,846 INFO L131 PetriNetUnfolder]: For 14531/14531 co-relation queries the response was YES. [2023-08-30 07:57:33,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19325 conditions, 4427 events. 2343/4427 cut-off events. For 14531/14531 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 27412 event pairs, 760 based on Foata normal form. 40/4187 useless extension candidates. Maximal degree in co-relation 19297. Up to 2408 conditions per place. [2023-08-30 07:57:33,860 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 65 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2023-08-30 07:57:33,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 84 transitions, 758 flow [2023-08-30 07:57:33,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:57:33,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:57:33,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1250 transitions. [2023-08-30 07:57:33,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2023-08-30 07:57:33,862 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1250 transitions. [2023-08-30 07:57:33,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1250 transitions. [2023-08-30 07:57:33,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:33,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1250 transitions. [2023-08-30 07:57:33,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:33,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:33,865 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:33,865 INFO L175 Difference]: Start difference. First operand has 85 places, 69 transitions, 536 flow. Second operand 5 states and 1250 transitions. [2023-08-30 07:57:33,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 84 transitions, 758 flow [2023-08-30 07:57:33,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 84 transitions, 702 flow, removed 16 selfloop flow, removed 2 redundant places. [2023-08-30 07:57:33,916 INFO L231 Difference]: Finished difference. Result has 88 places, 71 transitions, 543 flow [2023-08-30 07:57:33,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=543, PETRI_PLACES=88, PETRI_TRANSITIONS=71} [2023-08-30 07:57:33,917 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 36 predicate places. [2023-08-30 07:57:33,917 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 71 transitions, 543 flow [2023-08-30 07:57:33,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:33,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:33,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:33,925 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 07:57:34,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:34,117 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:57:34,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:34,118 INFO L85 PathProgramCache]: Analyzing trace with hash -27143235, now seen corresponding path program 6 times [2023-08-30 07:57:34,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:57:34,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855450759] [2023-08-30 07:57:34,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:57:34,118 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:34,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:57:34,119 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:57:34,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 07:57:34,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-30 07:57:34,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:57:34,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:57:34,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:34,267 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 07:57:34,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:57:34,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:57:34,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855450759] [2023-08-30 07:57:34,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855450759] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:57:34,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:57:34,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 07:57:34,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290023623] [2023-08-30 07:57:34,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:57:34,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:57:34,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:57:34,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:57:34,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:57:34,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 620 [2023-08-30 07:57:34,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 71 transitions, 543 flow. Second operand has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:34,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:34,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 620 [2023-08-30 07:57:34,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:35,198 INFO L130 PetriNetUnfolder]: 2323/4287 cut-off events. [2023-08-30 07:57:35,198 INFO L131 PetriNetUnfolder]: For 14559/14559 co-relation queries the response was YES. [2023-08-30 07:57:35,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18046 conditions, 4287 events. 2323/4287 cut-off events. For 14559/14559 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 25444 event pairs, 980 based on Foata normal form. 40/4047 useless extension candidates. Maximal degree in co-relation 18017. Up to 3348 conditions per place. [2023-08-30 07:57:35,213 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 65 selfloop transitions, 17 changer transitions 0/82 dead transitions. [2023-08-30 07:57:35,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 82 transitions, 755 flow [2023-08-30 07:57:35,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:57:35,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:57:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1246 transitions. [2023-08-30 07:57:35,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019354838709677 [2023-08-30 07:57:35,216 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1246 transitions. [2023-08-30 07:57:35,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1246 transitions. [2023-08-30 07:57:35,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:35,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1246 transitions. [2023-08-30 07:57:35,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 249.2) internal successors, (1246), 5 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:35,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:35,219 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:35,219 INFO L175 Difference]: Start difference. First operand has 88 places, 71 transitions, 543 flow. Second operand 5 states and 1246 transitions. [2023-08-30 07:57:35,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 82 transitions, 755 flow [2023-08-30 07:57:35,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 82 transitions, 705 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 07:57:35,260 INFO L231 Difference]: Finished difference. Result has 90 places, 73 transitions, 560 flow [2023-08-30 07:57:35,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=560, PETRI_PLACES=90, PETRI_TRANSITIONS=73} [2023-08-30 07:57:35,260 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 38 predicate places. [2023-08-30 07:57:35,260 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 73 transitions, 560 flow [2023-08-30 07:57:35,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:35,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:35,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:35,269 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 07:57:35,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:35,468 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:57:35,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:35,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2095420173, now seen corresponding path program 1 times [2023-08-30 07:57:35,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:57:35,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400647371] [2023-08-30 07:57:35,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:35,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:35,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:57:35,470 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:57:35,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 07:57:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:57:35,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:57:35,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:57:35,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:57:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:57:35,734 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:57:35,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400647371] [2023-08-30 07:57:35,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400647371] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:57:35,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:57:35,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 07:57:35,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478015732] [2023-08-30 07:57:35,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:57:35,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:57:35,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:57:35,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:57:35,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:57:36,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 620 [2023-08-30 07:57:36,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 73 transitions, 560 flow. Second operand has 10 states, 10 states have (on average 241.4) internal successors, (2414), 10 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:36,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:36,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 620 [2023-08-30 07:57:36,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:39,197 INFO L130 PetriNetUnfolder]: 5263/9907 cut-off events. [2023-08-30 07:57:39,197 INFO L131 PetriNetUnfolder]: For 28351/28351 co-relation queries the response was YES. [2023-08-30 07:57:39,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38167 conditions, 9907 events. 5263/9907 cut-off events. For 28351/28351 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 71576 event pairs, 640 based on Foata normal form. 240/9507 useless extension candidates. Maximal degree in co-relation 38137. Up to 3121 conditions per place. [2023-08-30 07:57:39,232 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 143 selfloop transitions, 48 changer transitions 0/191 dead transitions. [2023-08-30 07:57:39,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 191 transitions, 1483 flow [2023-08-30 07:57:39,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 07:57:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 07:57:39,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 4684 transitions. [2023-08-30 07:57:39,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976230899830221 [2023-08-30 07:57:39,236 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 4684 transitions. [2023-08-30 07:57:39,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 4684 transitions. [2023-08-30 07:57:39,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:39,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 4684 transitions. [2023-08-30 07:57:39,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 246.52631578947367) internal successors, (4684), 19 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:39,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 620.0) internal successors, (12400), 20 states have internal predecessors, (12400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:39,246 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 620.0) internal successors, (12400), 20 states have internal predecessors, (12400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:39,246 INFO L175 Difference]: Start difference. First operand has 90 places, 73 transitions, 560 flow. Second operand 19 states and 4684 transitions. [2023-08-30 07:57:39,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 191 transitions, 1483 flow [2023-08-30 07:57:39,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 191 transitions, 1402 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 07:57:39,329 INFO L231 Difference]: Finished difference. Result has 117 places, 102 transitions, 901 flow [2023-08-30 07:57:39,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=901, PETRI_PLACES=117, PETRI_TRANSITIONS=102} [2023-08-30 07:57:39,329 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 65 predicate places. [2023-08-30 07:57:39,329 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 102 transitions, 901 flow [2023-08-30 07:57:39,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.4) internal successors, (2414), 10 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:39,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:39,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:39,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 07:57:39,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:39,530 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:57:39,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:39,531 INFO L85 PathProgramCache]: Analyzing trace with hash -303569723, now seen corresponding path program 2 times [2023-08-30 07:57:39,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:57:39,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674167822] [2023-08-30 07:57:39,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:57:39,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:39,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:57:39,532 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:57:39,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 07:57:39,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:57:39,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:57:39,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:57:39,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:57:39,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:57:39,743 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 64 treesize of output 62 [2023-08-30 07:57:39,746 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 62 treesize of output 60 [2023-08-30 07:57:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:57:39,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:57:39,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674167822] [2023-08-30 07:57:39,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674167822] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:57:39,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:57:39,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 07:57:39,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231214201] [2023-08-30 07:57:39,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:57:39,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:57:39,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:57:39,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:57:39,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:57:40,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 620 [2023-08-30 07:57:40,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 102 transitions, 901 flow. Second operand has 10 states, 10 states have (on average 238.1) internal successors, (2381), 10 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:40,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:40,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 620 [2023-08-30 07:57:40,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:44,590 INFO L130 PetriNetUnfolder]: 7283/14087 cut-off events. [2023-08-30 07:57:44,591 INFO L131 PetriNetUnfolder]: For 71649/71649 co-relation queries the response was YES. [2023-08-30 07:57:44,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67539 conditions, 14087 events. 7283/14087 cut-off events. For 71649/71649 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 111151 event pairs, 962 based on Foata normal form. 320/13407 useless extension candidates. Maximal degree in co-relation 67497. Up to 4801 conditions per place. [2023-08-30 07:57:44,662 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 152 selfloop transitions, 73 changer transitions 0/225 dead transitions. [2023-08-30 07:57:44,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 225 transitions, 2071 flow [2023-08-30 07:57:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 07:57:44,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 07:57:44,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4148 transitions. [2023-08-30 07:57:44,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2023-08-30 07:57:44,666 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4148 transitions. [2023-08-30 07:57:44,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4148 transitions. [2023-08-30 07:57:44,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:44,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4148 transitions. [2023-08-30 07:57:44,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 244.0) internal successors, (4148), 17 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:44,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 620.0) internal successors, (11160), 18 states have internal predecessors, (11160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:44,674 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 620.0) internal successors, (11160), 18 states have internal predecessors, (11160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:44,674 INFO L175 Difference]: Start difference. First operand has 117 places, 102 transitions, 901 flow. Second operand 17 states and 4148 transitions. [2023-08-30 07:57:44,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 225 transitions, 2071 flow [2023-08-30 07:57:45,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 225 transitions, 1893 flow, removed 74 selfloop flow, removed 3 redundant places. [2023-08-30 07:57:45,471 INFO L231 Difference]: Finished difference. Result has 139 places, 138 transitions, 1348 flow [2023-08-30 07:57:45,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1348, PETRI_PLACES=139, PETRI_TRANSITIONS=138} [2023-08-30 07:57:45,471 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 87 predicate places. [2023-08-30 07:57:45,471 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 138 transitions, 1348 flow [2023-08-30 07:57:45,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 238.1) internal successors, (2381), 10 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:45,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:45,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:45,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 07:57:45,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:45,681 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:57:45,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:45,681 INFO L85 PathProgramCache]: Analyzing trace with hash -241653667, now seen corresponding path program 3 times [2023-08-30 07:57:45,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:57:45,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988880618] [2023-08-30 07:57:45,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:57:45,682 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:45,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:57:45,683 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:57:45,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 07:57:45,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 07:57:45,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:57:45,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:57:45,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:57:45,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:57:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:57:46,066 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:57:46,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988880618] [2023-08-30 07:57:46,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988880618] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:57:46,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:57:46,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 07:57:46,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731381312] [2023-08-30 07:57:46,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:57:46,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:57:46,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:57:46,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:57:46,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:57:46,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 620 [2023-08-30 07:57:46,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 138 transitions, 1348 flow. Second operand has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:46,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:46,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 620 [2023-08-30 07:57:46,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:50,867 INFO L130 PetriNetUnfolder]: 6863/12827 cut-off events. [2023-08-30 07:57:50,867 INFO L131 PetriNetUnfolder]: For 114941/114941 co-relation queries the response was YES. [2023-08-30 07:57:50,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70669 conditions, 12827 events. 6863/12827 cut-off events. For 114941/114941 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 95355 event pairs, 924 based on Foata normal form. 560/12747 useless extension candidates. Maximal degree in co-relation 70617. Up to 4081 conditions per place. [2023-08-30 07:57:50,944 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 137 selfloop transitions, 84 changer transitions 0/221 dead transitions. [2023-08-30 07:57:50,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 221 transitions, 2263 flow [2023-08-30 07:57:50,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 07:57:50,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 07:57:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3935 transitions. [2023-08-30 07:57:50,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3966733870967742 [2023-08-30 07:57:50,949 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3935 transitions. [2023-08-30 07:57:50,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3935 transitions. [2023-08-30 07:57:50,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:50,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3935 transitions. [2023-08-30 07:57:50,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 245.9375) internal successors, (3935), 16 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:50,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 620.0) internal successors, (10540), 17 states have internal predecessors, (10540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:50,959 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 620.0) internal successors, (10540), 17 states have internal predecessors, (10540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:50,959 INFO L175 Difference]: Start difference. First operand has 139 places, 138 transitions, 1348 flow. Second operand 16 states and 3935 transitions. [2023-08-30 07:57:50,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 221 transitions, 2263 flow [2023-08-30 07:57:52,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 221 transitions, 2069 flow, removed 71 selfloop flow, removed 4 redundant places. [2023-08-30 07:57:52,603 INFO L231 Difference]: Finished difference. Result has 153 places, 148 transitions, 1490 flow [2023-08-30 07:57:52,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1490, PETRI_PLACES=153, PETRI_TRANSITIONS=148} [2023-08-30 07:57:52,604 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 101 predicate places. [2023-08-30 07:57:52,604 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 148 transitions, 1490 flow [2023-08-30 07:57:52,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:52,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:52,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:52,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 07:57:52,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:52,809 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:57:52,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:52,809 INFO L85 PathProgramCache]: Analyzing trace with hash -392583389, now seen corresponding path program 4 times [2023-08-30 07:57:52,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:57:52,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409753301] [2023-08-30 07:57:52,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:57:52,810 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:52,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:57:52,810 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:57:52,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 07:57:52,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:57:52,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:57:52,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:57:52,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:57:53,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:57:53,067 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 64 treesize of output 62 [2023-08-30 07:57:53,071 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 62 treesize of output 60 [2023-08-30 07:57:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:57:53,220 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:57:53,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409753301] [2023-08-30 07:57:53,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409753301] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:57:53,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:57:53,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 07:57:53,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011421440] [2023-08-30 07:57:53,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:57:53,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:57:53,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:57:53,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:57:53,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:57:53,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 620 [2023-08-30 07:57:53,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 148 transitions, 1490 flow. Second operand has 10 states, 10 states have (on average 237.1) internal successors, (2371), 10 states have internal predecessors, (2371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:53,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:53,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 620 [2023-08-30 07:57:53,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:57,952 INFO L130 PetriNetUnfolder]: 7583/14347 cut-off events. [2023-08-30 07:57:57,952 INFO L131 PetriNetUnfolder]: For 106111/106111 co-relation queries the response was YES. [2023-08-30 07:57:57,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80432 conditions, 14347 events. 7583/14347 cut-off events. For 106111/106111 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 110784 event pairs, 2080 based on Foata normal form. 280/13747 useless extension candidates. Maximal degree in co-relation 80377. Up to 7968 conditions per place. [2023-08-30 07:57:58,037 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 151 selfloop transitions, 59 changer transitions 0/210 dead transitions. [2023-08-30 07:57:58,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 210 transitions, 2267 flow [2023-08-30 07:57:58,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 07:57:58,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 07:57:58,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3381 transitions. [2023-08-30 07:57:58,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3895161290322581 [2023-08-30 07:57:58,041 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3381 transitions. [2023-08-30 07:57:58,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3381 transitions. [2023-08-30 07:57:58,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:58,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3381 transitions. [2023-08-30 07:57:58,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 241.5) internal successors, (3381), 14 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:58,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 620.0) internal successors, (9300), 15 states have internal predecessors, (9300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:58,048 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 620.0) internal successors, (9300), 15 states have internal predecessors, (9300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:58,048 INFO L175 Difference]: Start difference. First operand has 153 places, 148 transitions, 1490 flow. Second operand 14 states and 3381 transitions. [2023-08-30 07:57:58,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 210 transitions, 2267 flow [2023-08-30 07:57:59,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 210 transitions, 2072 flow, removed 41 selfloop flow, removed 8 redundant places. [2023-08-30 07:57:59,544 INFO L231 Difference]: Finished difference. Result has 165 places, 164 transitions, 1661 flow [2023-08-30 07:57:59,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1661, PETRI_PLACES=165, PETRI_TRANSITIONS=164} [2023-08-30 07:57:59,544 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 113 predicate places. [2023-08-30 07:57:59,544 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 164 transitions, 1661 flow [2023-08-30 07:57:59,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 237.1) internal successors, (2371), 10 states have internal predecessors, (2371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:59,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:59,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:59,553 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 07:57:59,750 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 07:57:59,751 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:57:59,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:59,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1872588002, now seen corresponding path program 1 times [2023-08-30 07:57:59,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:57:59,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434588287] [2023-08-30 07:57:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:59,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:57:59,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:57:59,752 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 07:57:59,753 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 07:57:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:57:59,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:57:59,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:57:59,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:58:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:58:00,071 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:58:00,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434588287] [2023-08-30 07:58:00,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434588287] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:58:00,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:58:00,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 07:58:00,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820389129] [2023-08-30 07:58:00,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:58:00,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:58:00,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:58:00,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:58:00,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:58:00,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 620 [2023-08-30 07:58:00,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 164 transitions, 1661 flow. Second operand has 10 states, 10 states have (on average 239.3) internal successors, (2393), 10 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:00,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:58:00,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 620 [2023-08-30 07:58:00,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:58:07,380 INFO L130 PetriNetUnfolder]: 8843/16487 cut-off events. [2023-08-30 07:58:07,380 INFO L131 PetriNetUnfolder]: For 112422/112422 co-relation queries the response was YES. [2023-08-30 07:58:07,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94759 conditions, 16487 events. 8843/16487 cut-off events. For 112422/112422 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 128760 event pairs, 2104 based on Foata normal form. 80/15487 useless extension candidates. Maximal degree in co-relation 94697. Up to 8348 conditions per place. [2023-08-30 07:58:07,486 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 159 selfloop transitions, 88 changer transitions 0/247 dead transitions. [2023-08-30 07:58:07,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 247 transitions, 2700 flow [2023-08-30 07:58:07,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 07:58:07,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 07:58:07,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3907 transitions. [2023-08-30 07:58:07,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3938508064516129 [2023-08-30 07:58:07,490 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3907 transitions. [2023-08-30 07:58:07,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3907 transitions. [2023-08-30 07:58:07,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:58:07,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3907 transitions. [2023-08-30 07:58:07,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 244.1875) internal successors, (3907), 16 states have internal predecessors, (3907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:07,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 620.0) internal successors, (10540), 17 states have internal predecessors, (10540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:07,499 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 620.0) internal successors, (10540), 17 states have internal predecessors, (10540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:07,499 INFO L175 Difference]: Start difference. First operand has 165 places, 164 transitions, 1661 flow. Second operand 16 states and 3907 transitions. [2023-08-30 07:58:07,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 247 transitions, 2700 flow [2023-08-30 07:58:09,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 247 transitions, 2610 flow, removed 26 selfloop flow, removed 3 redundant places. [2023-08-30 07:58:09,369 INFO L231 Difference]: Finished difference. Result has 177 places, 194 transitions, 2166 flow [2023-08-30 07:58:09,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2166, PETRI_PLACES=177, PETRI_TRANSITIONS=194} [2023-08-30 07:58:09,370 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 125 predicate places. [2023-08-30 07:58:09,370 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 194 transitions, 2166 flow [2023-08-30 07:58:09,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 239.3) internal successors, (2393), 10 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:09,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:58:09,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:58:09,379 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 07:58:09,571 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 07:58:09,571 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:58:09,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:58:09,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1675259756, now seen corresponding path program 2 times [2023-08-30 07:58:09,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:58:09,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905417116] [2023-08-30 07:58:09,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:58:09,572 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 07:58:09,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:58:09,573 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 07:58:09,574 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 (27)] Waiting until timeout for monitored process [2023-08-30 07:58:09,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:58:09,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:58:09,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:58:09,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:58:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:58:09,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:58:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:58:09,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:58:09,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905417116] [2023-08-30 07:58:09,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905417116] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:58:09,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:58:09,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 07:58:09,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587206111] [2023-08-30 07:58:09,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:58:09,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:58:09,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:58:09,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:58:09,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:58:10,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 620 [2023-08-30 07:58:10,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 194 transitions, 2166 flow. Second operand has 10 states, 10 states have (on average 239.3) internal successors, (2393), 10 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:10,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:58:10,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 620 [2023-08-30 07:58:10,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:58:15,687 INFO L130 PetriNetUnfolder]: 9023/16867 cut-off events. [2023-08-30 07:58:15,687 INFO L131 PetriNetUnfolder]: For 117011/117011 co-relation queries the response was YES. [2023-08-30 07:58:15,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101280 conditions, 16867 events. 9023/16867 cut-off events. For 117011/117011 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 132740 event pairs, 2180 based on Foata normal form. 80/15907 useless extension candidates. Maximal degree in co-relation 101217. Up to 8348 conditions per place. [2023-08-30 07:58:15,797 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 172 selfloop transitions, 73 changer transitions 0/245 dead transitions. [2023-08-30 07:58:15,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 245 transitions, 2872 flow [2023-08-30 07:58:15,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 07:58:15,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 07:58:15,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3413 transitions. [2023-08-30 07:58:15,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39320276497695855 [2023-08-30 07:58:15,801 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3413 transitions. [2023-08-30 07:58:15,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3413 transitions. [2023-08-30 07:58:15,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:58:15,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3413 transitions. [2023-08-30 07:58:15,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 243.78571428571428) internal successors, (3413), 14 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:15,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 620.0) internal successors, (9300), 15 states have internal predecessors, (9300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:15,807 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 620.0) internal successors, (9300), 15 states have internal predecessors, (9300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:15,808 INFO L175 Difference]: Start difference. First operand has 177 places, 194 transitions, 2166 flow. Second operand 14 states and 3413 transitions. [2023-08-30 07:58:15,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 245 transitions, 2872 flow [2023-08-30 07:58:19,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 245 transitions, 2548 flow, removed 146 selfloop flow, removed 5 redundant places. [2023-08-30 07:58:19,744 INFO L231 Difference]: Finished difference. Result has 189 places, 200 transitions, 2130 flow [2023-08-30 07:58:19,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=1906, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2130, PETRI_PLACES=189, PETRI_TRANSITIONS=200} [2023-08-30 07:58:19,745 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 137 predicate places. [2023-08-30 07:58:19,745 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 200 transitions, 2130 flow [2023-08-30 07:58:19,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 239.3) internal successors, (2393), 10 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:19,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:58:19,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:58:19,754 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 (27)] Forceful destruction successful, exit code 0 [2023-08-30 07:58:19,946 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 07:58:19,946 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:58:19,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:58:19,946 INFO L85 PathProgramCache]: Analyzing trace with hash 517864581, now seen corresponding path program 5 times [2023-08-30 07:58:19,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:58:19,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983042885] [2023-08-30 07:58:19,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:58:19,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:58:19,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:58:19,947 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 07:58:19,948 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 07:58:20,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:58:20,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:58:20,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:58:20,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:58:20,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:58:20,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:58:20,161 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 64 treesize of output 62 [2023-08-30 07:58:20,164 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 62 treesize of output 60 [2023-08-30 07:58:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:58:20,193 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:58:20,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983042885] [2023-08-30 07:58:20,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983042885] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:58:20,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:58:20,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 07:58:20,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850622269] [2023-08-30 07:58:20,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:58:20,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:58:20,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:58:20,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:58:20,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:58:20,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 620 [2023-08-30 07:58:20,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 200 transitions, 2130 flow. Second operand has 10 states, 10 states have (on average 238.1) internal successors, (2381), 10 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:20,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:58:20,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 620 [2023-08-30 07:58:20,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:58:25,644 INFO L130 PetriNetUnfolder]: 11103/20827 cut-off events. [2023-08-30 07:58:25,644 INFO L131 PetriNetUnfolder]: For 116291/116291 co-relation queries the response was YES. [2023-08-30 07:58:25,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110883 conditions, 20827 events. 11103/20827 cut-off events. For 116291/116291 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 170061 event pairs, 1940 based on Foata normal form. 200/19587 useless extension candidates. Maximal degree in co-relation 110817. Up to 9268 conditions per place. [2023-08-30 07:58:25,767 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 200 selfloop transitions, 78 changer transitions 0/278 dead transitions. [2023-08-30 07:58:25,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 278 transitions, 3353 flow [2023-08-30 07:58:25,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:58:25,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:58:25,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2899 transitions. [2023-08-30 07:58:25,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896505376344086 [2023-08-30 07:58:25,771 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2899 transitions. [2023-08-30 07:58:25,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2899 transitions. [2023-08-30 07:58:25,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:58:25,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2899 transitions. [2023-08-30 07:58:25,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 241.58333333333334) internal successors, (2899), 12 states have internal predecessors, (2899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:25,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 620.0) internal successors, (8060), 13 states have internal predecessors, (8060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:25,777 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 620.0) internal successors, (8060), 13 states have internal predecessors, (8060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:25,777 INFO L175 Difference]: Start difference. First operand has 189 places, 200 transitions, 2130 flow. Second operand 12 states and 2899 transitions. [2023-08-30 07:58:25,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 278 transitions, 3353 flow [2023-08-30 07:58:27,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 278 transitions, 3308 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-30 07:58:27,414 INFO L231 Difference]: Finished difference. Result has 203 places, 217 transitions, 2533 flow [2023-08-30 07:58:27,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=2094, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2533, PETRI_PLACES=203, PETRI_TRANSITIONS=217} [2023-08-30 07:58:27,414 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 151 predicate places. [2023-08-30 07:58:27,414 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 217 transitions, 2533 flow [2023-08-30 07:58:27,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 238.1) internal successors, (2381), 10 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:27,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:58:27,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:58:27,429 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 (28)] Forceful destruction successful, exit code 0 [2023-08-30 07:58:27,615 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 07:58:27,616 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:58:27,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:58:27,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1568471229, now seen corresponding path program 6 times [2023-08-30 07:58:27,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:58:27,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058327339] [2023-08-30 07:58:27,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:58:27,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:58:27,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:58:27,618 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 07:58:27,619 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 07:58:27,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 07:58:27,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:58:27,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:58:27,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:58:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:58:27,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:58:27,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:58:27,989 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:58:27,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058327339] [2023-08-30 07:58:27,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058327339] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:58:27,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:58:27,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 07:58:27,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077082236] [2023-08-30 07:58:27,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:58:27,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:58:27,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:58:27,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:58:27,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:58:28,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 620 [2023-08-30 07:58:28,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 217 transitions, 2533 flow. Second operand has 10 states, 10 states have (on average 238.3) internal successors, (2383), 10 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:28,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:58:28,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 620 [2023-08-30 07:58:28,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:58:36,333 INFO L130 PetriNetUnfolder]: 11943/22947 cut-off events. [2023-08-30 07:58:36,333 INFO L131 PetriNetUnfolder]: For 180483/180483 co-relation queries the response was YES. [2023-08-30 07:58:36,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133290 conditions, 22947 events. 11943/22947 cut-off events. For 180483/180483 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 194401 event pairs, 2520 based on Foata normal form. 720/22867 useless extension candidates. Maximal degree in co-relation 133217. Up to 12688 conditions per place. [2023-08-30 07:58:36,479 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 194 selfloop transitions, 121 changer transitions 0/315 dead transitions. [2023-08-30 07:58:36,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 315 transitions, 4037 flow [2023-08-30 07:58:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 07:58:36,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 07:58:36,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3879 transitions. [2023-08-30 07:58:36,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39102822580645163 [2023-08-30 07:58:36,484 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3879 transitions. [2023-08-30 07:58:36,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3879 transitions. [2023-08-30 07:58:36,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:58:36,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3879 transitions. [2023-08-30 07:58:36,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 242.4375) internal successors, (3879), 16 states have internal predecessors, (3879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:36,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 620.0) internal successors, (10540), 17 states have internal predecessors, (10540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:36,491 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 620.0) internal successors, (10540), 17 states have internal predecessors, (10540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:36,491 INFO L175 Difference]: Start difference. First operand has 203 places, 217 transitions, 2533 flow. Second operand 16 states and 3879 transitions. [2023-08-30 07:58:36,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 315 transitions, 4037 flow [2023-08-30 07:58:39,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 315 transitions, 3848 flow, removed 47 selfloop flow, removed 4 redundant places. [2023-08-30 07:58:39,409 INFO L231 Difference]: Finished difference. Result has 218 places, 262 transitions, 3388 flow [2023-08-30 07:58:39,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=2396, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3388, PETRI_PLACES=218, PETRI_TRANSITIONS=262} [2023-08-30 07:58:39,409 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 166 predicate places. [2023-08-30 07:58:39,410 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 262 transitions, 3388 flow [2023-08-30 07:58:39,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 238.3) internal successors, (2383), 10 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:39,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:58:39,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:58:39,421 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 (29)] Ended with exit code 0 [2023-08-30 07:58:39,618 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 07:58:39,619 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:58:39,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:58:39,619 INFO L85 PathProgramCache]: Analyzing trace with hash -755408778, now seen corresponding path program 3 times [2023-08-30 07:58:39,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:58:39,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282275631] [2023-08-30 07:58:39,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:58:39,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:58:39,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:58:39,621 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 07:58:39,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-30 07:58:39,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 07:58:39,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:58:39,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:58:39,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:58:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:58:39,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:58:39,880 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 64 treesize of output 62 [2023-08-30 07:58:39,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2023-08-30 07:58:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:58:39,972 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:58:39,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282275631] [2023-08-30 07:58:39,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282275631] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:58:39,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:58:39,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 07:58:39,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557006051] [2023-08-30 07:58:39,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:58:39,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:58:39,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:58:39,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:58:39,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:58:40,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 620 [2023-08-30 07:58:40,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 262 transitions, 3388 flow. Second operand has 10 states, 10 states have (on average 237.1) internal successors, (2371), 10 states have internal predecessors, (2371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:40,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:58:40,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 620 [2023-08-30 07:58:40,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:58:49,194 INFO L130 PetriNetUnfolder]: 16123/29287 cut-off events. [2023-08-30 07:58:49,195 INFO L131 PetriNetUnfolder]: For 220351/220351 co-relation queries the response was YES. [2023-08-30 07:58:49,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181614 conditions, 29287 events. 16123/29287 cut-off events. For 220351/220351 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 243368 event pairs, 1520 based on Foata normal form. 200/27167 useless extension candidates. Maximal degree in co-relation 181537. Up to 9460 conditions per place. [2023-08-30 07:58:49,406 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 219 selfloop transitions, 156 changer transitions 0/375 dead transitions. [2023-08-30 07:58:49,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 375 transitions, 5288 flow [2023-08-30 07:58:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 07:58:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 07:58:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3390 transitions. [2023-08-30 07:58:49,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39055299539170507 [2023-08-30 07:58:49,410 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3390 transitions. [2023-08-30 07:58:49,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3390 transitions. [2023-08-30 07:58:49,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:58:49,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3390 transitions. [2023-08-30 07:58:49,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 242.14285714285714) internal successors, (3390), 14 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:49,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 620.0) internal successors, (9300), 15 states have internal predecessors, (9300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:49,416 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 620.0) internal successors, (9300), 15 states have internal predecessors, (9300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:49,416 INFO L175 Difference]: Start difference. First operand has 218 places, 262 transitions, 3388 flow. Second operand 14 states and 3390 transitions. [2023-08-30 07:58:49,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 375 transitions, 5288 flow [2023-08-30 07:58:56,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 375 transitions, 4917 flow, removed 159 selfloop flow, removed 4 redundant places. [2023-08-30 07:58:56,378 INFO L231 Difference]: Finished difference. Result has 231 places, 308 transitions, 4060 flow [2023-08-30 07:58:56,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=3049, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4060, PETRI_PLACES=231, PETRI_TRANSITIONS=308} [2023-08-30 07:58:56,378 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 179 predicate places. [2023-08-30 07:58:56,379 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 308 transitions, 4060 flow [2023-08-30 07:58:56,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 237.1) internal successors, (2371), 10 states have internal predecessors, (2371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:58:56,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:58:56,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:58:56,390 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 (30)] Ended with exit code 0 [2023-08-30 07:58:56,587 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 07:58:56,588 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 07:58:56,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:58:56,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1933700115, now seen corresponding path program 7 times [2023-08-30 07:58:56,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:58:56,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057463524] [2023-08-30 07:58:56,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 07:58:56,589 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:58:56,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:58:56,590 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 07:58:56,591 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 07:58:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:58:56,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:58:56,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:58:57,253 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 552 treesize of output 544 [2023-08-30 07:58:57,264 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 544 treesize of output 536 [2023-08-30 07:59:42,418 WARN L222 SmtUtils]: Spent 12.07s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:59:43,492 INFO L321 Elim1Store]: treesize reduction 972, result has 1.3 percent of original size [2023-08-30 07:59:43,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 28 new quantified variables, introduced 120 case distinctions, treesize of input 5692 treesize of output 274 [2023-08-30 07:59:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:59:45,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:59:55,239 WARN L222 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 600 DAG size of output: 162 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-08-30 07:59:55,240 INFO L321 Elim1Store]: treesize reduction 1680, result has 22.3 percent of original size [2023-08-30 07:59:55,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 190 case distinctions, treesize of input 683 treesize of output 988 [2023-08-30 07:59:55,276 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 499 treesize of output 491 [2023-08-30 07:59:55,310 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 491 treesize of output 483 [2023-08-30 08:03:46,021 WARN L222 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 930 DAG size of output: 987 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15