./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-word-subst.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/chl-word-subst.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 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 --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 05:19:07,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:19:07,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:19:07,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:19:07,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:19:07,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:19:07,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:19:07,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:19:07,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:19:07,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:19:07,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:19:07,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:19:07,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:19:07,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:19:07,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:19:07,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:19:07,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:19:07,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:19:07,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:19:07,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:19:07,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:19:07,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:19:07,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:19:07,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:19:07,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:19:07,262 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:19:07,262 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:19:07,263 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:19:07,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:19:07,264 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:19:07,265 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:19:07,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:19:07,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:19:07,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:19:07,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:19:07,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:19:07,270 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:19:07,270 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:19:07,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:19:07,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:19:07,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:19:07,294 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 05:19:07,319 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:19:07,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:19:07,320 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:19:07,320 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:19:07,321 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:19:07,321 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:19:07,321 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:19:07,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:19:07,322 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:19:07,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:19:07,322 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:19:07,323 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:19:07,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:19:07,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:19:07,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:19:07,323 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:19:07,323 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:19:07,323 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:19:07,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:19:07,324 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:19:07,324 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:19:07,324 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:19:07,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:19:07,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:19:07,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:19:07,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:19:07,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:19:07,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:19:07,325 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 05:19:07,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 05:19:07,325 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:19:07,325 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:19:07,326 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:19:07,326 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:19:07,326 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:19:07,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:19:07,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:19:07,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:19:07,624 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:19:07,625 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:19:07,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-subst.wvr.c [2023-08-30 05:19:08,846 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:19:09,034 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:19:09,035 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-subst.wvr.c [2023-08-30 05:19:09,039 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e95764fd3/8859d17e9076476db207d2156be75fd2/FLAG1db99a194 [2023-08-30 05:19:09,048 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e95764fd3/8859d17e9076476db207d2156be75fd2 [2023-08-30 05:19:09,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:19:09,051 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:19:09,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:19:09,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:19:09,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:19:09,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:19:09" (1/1) ... [2023-08-30 05:19:09,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11c29101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:09, skipping insertion in model container [2023-08-30 05:19:09,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:19:09" (1/1) ... [2023-08-30 05:19:09,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:19:09,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:19:09,193 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-subst.wvr.c[3345,3358] [2023-08-30 05:19:09,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:19:09,216 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 05:19:09,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@d78698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:09, skipping insertion in model container [2023-08-30 05:19:09,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:19:09,225 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 05:19:09,226 INFO L158 Benchmark]: Toolchain (without parser) took 175.06ms. Allocated memory is still 67.1MB. Free memory was 44.7MB in the beginning and 34.7MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 05:19:09,227 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 67.1MB. Free memory was 44.6MB in the beginning and 44.5MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 05:19:09,227 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.03ms. Allocated memory is still 67.1MB. Free memory was 44.5MB in the beginning and 34.7MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 05:19:09,228 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 67.1MB. Free memory was 44.6MB in the beginning and 44.5MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 172.03ms. Allocated memory is still 67.1MB. Free memory was 44.5MB in the beginning and 34.7MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 138]: 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/chl-word-subst.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 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 --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 05:19:10,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:19:10,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:19:10,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:19:10,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:19:10,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:19:10,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:19:10,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:19:10,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:19:10,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:19:10,783 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:19:10,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:19:10,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:19:10,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:19:10,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:19:10,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:19:10,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:19:10,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:19:10,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:19:10,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:19:10,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:19:10,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:19:10,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:19:10,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:19:10,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:19:10,810 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:19:10,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:19:10,810 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:19:10,811 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:19:10,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:19:10,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:19:10,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:19:10,813 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:19:10,814 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:19:10,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:19:10,816 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:19:10,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:19:10,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:19:10,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:19:10,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:19:10,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:19:10,819 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 05:19:10,843 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:19:10,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:19:10,843 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:19:10,844 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:19:10,844 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:19:10,844 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:19:10,845 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:19:10,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:19:10,845 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:19:10,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:19:10,846 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:19:10,846 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:19:10,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:19:10,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:19:10,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:19:10,847 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:19:10,847 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:19:10,847 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:19:10,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:19:10,847 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:19:10,847 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 05:19:10,847 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 05:19:10,848 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:19:10,848 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:19:10,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:19:10,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:19:10,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:19:10,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:19:10,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:19:10,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:19:10,849 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 05:19:10,849 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 05:19:10,849 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:19:10,849 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:19:10,850 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:19:10,850 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 05:19:10,850 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:19:10,850 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:19:11,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:19:11,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:19:11,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:19:11,122 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:19:11,122 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:19:11,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-subst.wvr.c [2023-08-30 05:19:12,238 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:19:12,416 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:19:12,418 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-subst.wvr.c [2023-08-30 05:19:12,423 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab413f04d/7f956e291eb8475d9c53880029b5bf28/FLAG263ac48c3 [2023-08-30 05:19:12,434 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab413f04d/7f956e291eb8475d9c53880029b5bf28 [2023-08-30 05:19:12,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:19:12,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:19:12,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:19:12,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:19:12,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:19:12,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:19:12" (1/1) ... [2023-08-30 05:19:12,442 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12d99cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:12, skipping insertion in model container [2023-08-30 05:19:12,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:19:12" (1/1) ... [2023-08-30 05:19:12,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:19:12,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:19:12,639 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/chl-word-subst.wvr.c[3345,3358] [2023-08-30 05:19:12,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:19:12,667 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 05:19:12,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:19:12,702 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/chl-word-subst.wvr.c[3345,3358] [2023-08-30 05:19:12,706 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:19:12,712 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 05:19:12,741 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/chl-word-subst.wvr.c[3345,3358] [2023-08-30 05:19:12,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:19:12,762 INFO L208 MainTranslator]: Completed translation [2023-08-30 05:19:12,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:12 WrapperNode [2023-08-30 05:19:12,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:19:12,764 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 05:19:12,764 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 05:19:12,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 05:19:12,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:12" (1/1) ... [2023-08-30 05:19:12,787 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:12" (1/1) ... [2023-08-30 05:19:12,810 INFO L138 Inliner]: procedures = 27, calls = 45, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 176 [2023-08-30 05:19:12,811 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 05:19:12,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 05:19:12,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 05:19:12,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 05:19:12,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:12" (1/1) ... [2023-08-30 05:19:12,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:12" (1/1) ... [2023-08-30 05:19:12,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:12" (1/1) ... [2023-08-30 05:19:12,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:12" (1/1) ... [2023-08-30 05:19:12,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:12" (1/1) ... [2023-08-30 05:19:12,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:12" (1/1) ... [2023-08-30 05:19:12,868 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:12" (1/1) ... [2023-08-30 05:19:12,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:12" (1/1) ... [2023-08-30 05:19:12,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 05:19:12,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 05:19:12,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 05:19:12,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 05:19:12,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:12" (1/1) ... [2023-08-30 05:19:12,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:19:12,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:19:12,930 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 05:19:12,976 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 05:19:12,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 05:19:12,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 05:19:12,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 05:19:12,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 05:19:12,987 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 05:19:12,987 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 05:19:12,987 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 05:19:12,987 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 05:19:12,987 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 05:19:12,987 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 05:19:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 05:19:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 05:19:12,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 05:19:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 05:19:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 05:19:12,989 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 05:19:13,109 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 05:19:13,126 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 05:19:13,731 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 05:19:13,737 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 05:19:13,737 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 05:19:13,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:19:13 BoogieIcfgContainer [2023-08-30 05:19:13,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 05:19:13,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 05:19:13,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 05:19:13,742 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 05:19:13,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:19:12" (1/3) ... [2023-08-30 05:19:13,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fea9140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:19:13, skipping insertion in model container [2023-08-30 05:19:13,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:12" (2/3) ... [2023-08-30 05:19:13,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fea9140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:19:13, skipping insertion in model container [2023-08-30 05:19:13,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:19:13" (3/3) ... [2023-08-30 05:19:13,744 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2023-08-30 05:19:13,754 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 05:19:13,754 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-08-30 05:19:13,754 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 05:19:13,826 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 05:19:13,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 315 places, 334 transitions, 692 flow [2023-08-30 05:19:13,918 INFO L130 PetriNetUnfolder]: 29/331 cut-off events. [2023-08-30 05:19:13,918 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 05:19:13,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 331 events. 29/331 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 629 event pairs, 0 based on Foata normal form. 0/258 useless extension candidates. Maximal degree in co-relation 252. Up to 3 conditions per place. [2023-08-30 05:19:13,932 INFO L82 GeneralOperation]: Start removeDead. Operand has 315 places, 334 transitions, 692 flow [2023-08-30 05:19:13,940 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 308 places, 327 transitions, 672 flow [2023-08-30 05:19:13,943 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 05:19:13,949 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 308 places, 327 transitions, 672 flow [2023-08-30 05:19:13,950 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 308 places, 327 transitions, 672 flow [2023-08-30 05:19:13,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 327 transitions, 672 flow [2023-08-30 05:19:14,009 INFO L130 PetriNetUnfolder]: 29/327 cut-off events. [2023-08-30 05:19:14,010 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 05:19:14,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 327 events. 29/327 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 622 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 252. Up to 3 conditions per place. [2023-08-30 05:19:14,017 INFO L119 LiptonReduction]: Number of co-enabled transitions 12768 [2023-08-30 05:19:42,426 INFO L134 LiptonReduction]: Checked pairs total: 23911 [2023-08-30 05:19:42,427 INFO L136 LiptonReduction]: Total number of compositions: 372 [2023-08-30 05:19:42,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 05:19:42,441 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;@63dc86ac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 05:19:42,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-08-30 05:19:42,444 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 05:19:42,444 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 05:19:42,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:19:42,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:19:42,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 05:19:42,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:19:42,448 INFO L85 PathProgramCache]: Analyzing trace with hash 41712, now seen corresponding path program 1 times [2023-08-30 05:19:42,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:19:42,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115870227] [2023-08-30 05:19:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:19:42,457 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 05:19:42,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:19:42,475 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 05:19:42,476 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 05:19:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:19:42,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 05:19:42,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:19:42,713 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 05:19:42,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 05:19:42,759 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 05:19:42,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:19:42,760 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:19:42,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115870227] [2023-08-30 05:19:42,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115870227] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:19:42,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:19:42,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:19:42,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666584141] [2023-08-30 05:19:42,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:19:42,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:19:42,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:19:42,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:19:42,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:19:42,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 706 [2023-08-30 05:19:42,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 298.6666666666667) internal successors, (896), 3 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:42,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:19:42,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 706 [2023-08-30 05:19:42,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:19:45,516 INFO L130 PetriNetUnfolder]: 20232/26991 cut-off events. [2023-08-30 05:19:45,518 INFO L131 PetriNetUnfolder]: For 482/482 co-relation queries the response was YES. [2023-08-30 05:19:45,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54515 conditions, 26991 events. 20232/26991 cut-off events. For 482/482 co-relation queries the response was YES. Maximal size of possible extension queue 1370. Compared 142094 event pairs, 15757 based on Foata normal form. 0/8337 useless extension candidates. Maximal degree in co-relation 51676. Up to 26991 conditions per place. [2023-08-30 05:19:45,668 INFO L137 encePairwiseOnDemand]: 697/706 looper letters, 73 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-08-30 05:19:45,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 74 transitions, 314 flow [2023-08-30 05:19:45,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:19:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:19:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 976 transitions. [2023-08-30 05:19:45,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46081208687440983 [2023-08-30 05:19:45,683 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 976 transitions. [2023-08-30 05:19:45,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 976 transitions. [2023-08-30 05:19:45,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:19:45,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 976 transitions. [2023-08-30 05:19:45,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.3333333333333) internal successors, (976), 3 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:45,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:45,703 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:45,704 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 182 flow. Second operand 3 states and 976 transitions. [2023-08-30 05:19:45,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 74 transitions, 314 flow [2023-08-30 05:19:45,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 74 transitions, 302 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 05:19:45,718 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 156 flow [2023-08-30 05:19:45,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2023-08-30 05:19:45,722 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -12 predicate places. [2023-08-30 05:19:45,723 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 156 flow [2023-08-30 05:19:45,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 298.6666666666667) internal successors, (896), 3 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:45,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:19:45,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:19:45,751 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 05:19:45,933 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 05:19:45,934 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 05:19:45,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:19:45,937 INFO L85 PathProgramCache]: Analyzing trace with hash 41711, now seen corresponding path program 1 times [2023-08-30 05:19:45,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:19:45,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529355995] [2023-08-30 05:19:45,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:19:45,938 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 05:19:45,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:19:45,939 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 05:19:45,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 05:19:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:19:45,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:19:45,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:19:46,087 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:19:46,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 05:19:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:19:46,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:19:46,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:19:46,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529355995] [2023-08-30 05:19:46,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529355995] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:19:46,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:19:46,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:19:46,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643687963] [2023-08-30 05:19:46,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:19:46,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:19:46,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:19:46,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:19:46,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:19:46,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 706 [2023-08-30 05:19:46,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 298.6666666666667) internal successors, (896), 3 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:46,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:19:46,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 706 [2023-08-30 05:19:46,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:19:50,535 INFO L130 PetriNetUnfolder]: 40463/53978 cut-off events. [2023-08-30 05:19:50,535 INFO L131 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2023-08-30 05:19:50,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108382 conditions, 53978 events. 40463/53978 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 2478. Compared 308556 event pairs, 31514 based on Foata normal form. 0/16673 useless extension candidates. Maximal degree in co-relation 108376. Up to 26992 conditions per place. [2023-08-30 05:19:50,848 INFO L137 encePairwiseOnDemand]: 697/706 looper letters, 138 selfloop transitions, 6 changer transitions 0/144 dead transitions. [2023-08-30 05:19:50,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 144 transitions, 590 flow [2023-08-30 05:19:50,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:19:50,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:19:50,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1041 transitions. [2023-08-30 05:19:50,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4915014164305949 [2023-08-30 05:19:50,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1041 transitions. [2023-08-30 05:19:50,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1041 transitions. [2023-08-30 05:19:50,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:19:50,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1041 transitions. [2023-08-30 05:19:50,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 347.0) internal successors, (1041), 3 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:50,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:50,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:50,858 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 156 flow. Second operand 3 states and 1041 transitions. [2023-08-30 05:19:50,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 144 transitions, 590 flow [2023-08-30 05:19:50,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 144 transitions, 589 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:19:50,862 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 205 flow [2023-08-30 05:19:50,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2023-08-30 05:19:50,863 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -9 predicate places. [2023-08-30 05:19:50,863 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 205 flow [2023-08-30 05:19:50,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 298.6666666666667) internal successors, (896), 3 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:50,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:19:50,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 05:19:50,881 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 05:19:51,073 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 05:19:51,073 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 05:19:51,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:19:51,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1298296, now seen corresponding path program 1 times [2023-08-30 05:19:51,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:19:51,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093455491] [2023-08-30 05:19:51,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:19:51,074 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 05:19:51,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:19:51,075 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 05:19:51,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 05:19:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:19:51,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 05:19:51,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:19:51,253 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:19:51,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 05:19:51,305 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 05:19:51,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:19:51,457 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 05:19:51,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:19:51,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093455491] [2023-08-30 05:19:51,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093455491] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:19:51,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:19:51,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 05:19:51,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714652582] [2023-08-30 05:19:51,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:19:51,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:19:51,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:19:51,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:19:51,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:19:53,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 706 [2023-08-30 05:19:53,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 205 flow. Second operand has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:53,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:19:53,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 706 [2023-08-30 05:19:53,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:20:01,536 INFO L130 PetriNetUnfolder]: 60704/80981 cut-off events. [2023-08-30 05:20:01,537 INFO L131 PetriNetUnfolder]: For 270/270 co-relation queries the response was YES. [2023-08-30 05:20:01,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162641 conditions, 80981 events. 60704/80981 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 3593. Compared 484956 event pairs, 47271 based on Foata normal form. 0/25030 useless extension candidates. Maximal degree in co-relation 162632. Up to 26993 conditions per place. [2023-08-30 05:20:01,863 INFO L137 encePairwiseOnDemand]: 694/706 looper letters, 203 selfloop transitions, 27 changer transitions 0/230 dead transitions. [2023-08-30 05:20:01,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 230 transitions, 1021 flow [2023-08-30 05:20:01,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 05:20:01,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 05:20:01,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1937 transitions. [2023-08-30 05:20:01,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4572710103871577 [2023-08-30 05:20:01,868 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1937 transitions. [2023-08-30 05:20:01,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1937 transitions. [2023-08-30 05:20:01,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:20:01,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1937 transitions. [2023-08-30 05:20:01,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 322.8333333333333) internal successors, (1937), 6 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:01,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 706.0) internal successors, (4942), 7 states have internal predecessors, (4942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:01,879 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 706.0) internal successors, (4942), 7 states have internal predecessors, (4942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:01,879 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 205 flow. Second operand 6 states and 1937 transitions. [2023-08-30 05:20:01,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 230 transitions, 1021 flow [2023-08-30 05:20:01,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 230 transitions, 997 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:20:01,882 INFO L231 Difference]: Finished difference. Result has 79 places, 100 transitions, 397 flow [2023-08-30 05:20:01,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=397, PETRI_PLACES=79, PETRI_TRANSITIONS=100} [2023-08-30 05:20:01,883 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -2 predicate places. [2023-08-30 05:20:01,883 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 100 transitions, 397 flow [2023-08-30 05:20:01,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:01,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:20:01,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 05:20:01,892 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 05:20:02,091 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 05:20:02,092 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 05:20:02,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:20:02,092 INFO L85 PathProgramCache]: Analyzing trace with hash 40325919, now seen corresponding path program 1 times [2023-08-30 05:20:02,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:20:02,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266359909] [2023-08-30 05:20:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:20:02,093 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 05:20:02,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:20:02,095 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 05:20:02,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 05:20:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:20:02,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 05:20:02,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:20:02,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:20:02,266 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 05:20:02,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-30 05:20:02,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:20:02,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 05:20:02,374 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 05:20:02,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 05:20:02,386 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 05:20:02,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:20:02,386 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:20:02,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266359909] [2023-08-30 05:20:02,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266359909] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:20:02,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:20:02,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:20:02,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080260529] [2023-08-30 05:20:02,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:20:02,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:20:02,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:20:02,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:20:02,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:20:02,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 706 [2023-08-30 05:20:02,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 100 transitions, 397 flow. Second operand has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:02,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:20:02,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 706 [2023-08-30 05:20:02,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:20:08,367 INFO L130 PetriNetUnfolder]: 46590/62748 cut-off events. [2023-08-30 05:20:08,367 INFO L131 PetriNetUnfolder]: For 278/278 co-relation queries the response was YES. [2023-08-30 05:20:08,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126237 conditions, 62748 events. 46590/62748 cut-off events. For 278/278 co-relation queries the response was YES. Maximal size of possible extension queue 2914. Compared 375569 event pairs, 36099 based on Foata normal form. 0/20915 useless extension candidates. Maximal degree in co-relation 126224. Up to 62748 conditions per place. [2023-08-30 05:20:08,701 INFO L137 encePairwiseOnDemand]: 703/706 looper letters, 95 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2023-08-30 05:20:08,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 96 transitions, 569 flow [2023-08-30 05:20:08,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:20:08,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:20:08,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 989 transitions. [2023-08-30 05:20:08,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669499527856468 [2023-08-30 05:20:08,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 989 transitions. [2023-08-30 05:20:08,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 989 transitions. [2023-08-30 05:20:08,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:20:08,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 989 transitions. [2023-08-30 05:20:08,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:08,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:08,710 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:08,710 INFO L175 Difference]: Start difference. First operand has 79 places, 100 transitions, 397 flow. Second operand 3 states and 989 transitions. [2023-08-30 05:20:08,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 96 transitions, 569 flow [2023-08-30 05:20:08,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 96 transitions, 539 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 05:20:08,714 INFO L231 Difference]: Finished difference. Result has 78 places, 96 transitions, 349 flow [2023-08-30 05:20:08,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=349, PETRI_PLACES=78, PETRI_TRANSITIONS=96} [2023-08-30 05:20:08,715 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -3 predicate places. [2023-08-30 05:20:08,716 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 96 transitions, 349 flow [2023-08-30 05:20:08,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:08,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:20:08,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 05:20:08,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-08-30 05:20:08,924 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 05:20:08,928 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 05:20:08,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:20:08,929 INFO L85 PathProgramCache]: Analyzing trace with hash 40325918, now seen corresponding path program 1 times [2023-08-30 05:20:08,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:20:08,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007173835] [2023-08-30 05:20:08,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:20:08,929 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 05:20:08,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:20:08,931 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 05:20:08,933 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 05:20:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:20:09,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 05:20:09,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:20:09,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:20:09,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:20:09,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:20:09,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:20:09,111 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 05:20:09,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 05:20:09,139 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 05:20:09,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 05:20:09,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:20:09,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:20:09,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:20:09,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:20:09,261 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 05:20:09,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:20:09,261 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:20:09,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007173835] [2023-08-30 05:20:09,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007173835] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:20:09,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:20:09,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:20:09,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624760358] [2023-08-30 05:20:09,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:20:09,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:20:09,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:20:09,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:20:09,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:20:09,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 706 [2023-08-30 05:20:09,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 96 transitions, 349 flow. Second operand has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:09,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:20:09,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 706 [2023-08-30 05:20:09,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:20:13,229 INFO L130 PetriNetUnfolder]: 32476/44515 cut-off events. [2023-08-30 05:20:13,229 INFO L131 PetriNetUnfolder]: For 282/282 co-relation queries the response was YES. [2023-08-30 05:20:13,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89745 conditions, 44515 events. 32476/44515 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 2077. Compared 266190 event pairs, 24927 based on Foata normal form. 0/16799 useless extension candidates. Maximal degree in co-relation 89731. Up to 44515 conditions per place. [2023-08-30 05:20:13,446 INFO L137 encePairwiseOnDemand]: 703/706 looper letters, 91 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2023-08-30 05:20:13,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 513 flow [2023-08-30 05:20:13,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:20:13,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:20:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 987 transitions. [2023-08-30 05:20:13,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4660056657223796 [2023-08-30 05:20:13,449 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 987 transitions. [2023-08-30 05:20:13,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 987 transitions. [2023-08-30 05:20:13,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:20:13,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 987 transitions. [2023-08-30 05:20:13,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 329.0) internal successors, (987), 3 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:13,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:13,455 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:13,455 INFO L175 Difference]: Start difference. First operand has 78 places, 96 transitions, 349 flow. Second operand 3 states and 987 transitions. [2023-08-30 05:20:13,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 513 flow [2023-08-30 05:20:13,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 92 transitions, 512 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:20:13,460 INFO L231 Difference]: Finished difference. Result has 77 places, 92 transitions, 330 flow [2023-08-30 05:20:13,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=330, PETRI_PLACES=77, PETRI_TRANSITIONS=92} [2023-08-30 05:20:13,463 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -4 predicate places. [2023-08-30 05:20:13,463 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 92 transitions, 330 flow [2023-08-30 05:20:13,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:13,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:20:13,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 05:20:13,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-08-30 05:20:13,671 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 05:20:13,671 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 05:20:13,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:20:13,672 INFO L85 PathProgramCache]: Analyzing trace with hash 98529700, now seen corresponding path program 1 times [2023-08-30 05:20:13,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:20:13,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251679764] [2023-08-30 05:20:13,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:20:13,672 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 05:20:13,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:20:13,673 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 05:20:13,675 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 05:20:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:20:13,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 05:20:13,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:20:13,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:20:13,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:20:13,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:20:13,845 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:20:13,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 05:20:13,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 05:20:13,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:20:13,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:20:13,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:20:13,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:20:13,949 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 05:20:13,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:20:13,949 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:20:13,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251679764] [2023-08-30 05:20:13,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251679764] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:20:13,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:20:13,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:20:13,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25422706] [2023-08-30 05:20:13,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:20:13,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:20:13,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:20:13,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:20:13,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:20:14,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 706 [2023-08-30 05:20:14,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 92 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 306.5) internal successors, (1226), 4 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 05:20:14,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:20:14,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 706 [2023-08-30 05:20:14,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:20:17,687 INFO L130 PetriNetUnfolder]: 31756/43459 cut-off events. [2023-08-30 05:20:17,688 INFO L131 PetriNetUnfolder]: For 282/282 co-relation queries the response was YES. [2023-08-30 05:20:17,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87634 conditions, 43459 events. 31756/43459 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 2022. Compared 258291 event pairs, 24363 based on Foata normal form. 0/16595 useless extension candidates. Maximal degree in co-relation 87619. Up to 43459 conditions per place. [2023-08-30 05:20:17,883 INFO L137 encePairwiseOnDemand]: 703/706 looper letters, 89 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2023-08-30 05:20:17,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 90 transitions, 506 flow [2023-08-30 05:20:17,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:20:17,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:20:17,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 985 transitions. [2023-08-30 05:20:17,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46506137865911235 [2023-08-30 05:20:17,902 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 985 transitions. [2023-08-30 05:20:17,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 985 transitions. [2023-08-30 05:20:17,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:20:17,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 985 transitions. [2023-08-30 05:20:17,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:17,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:17,919 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:17,920 INFO L175 Difference]: Start difference. First operand has 77 places, 92 transitions, 330 flow. Second operand 3 states and 985 transitions. [2023-08-30 05:20:17,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 90 transitions, 506 flow [2023-08-30 05:20:17,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 90 transitions, 505 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:20:17,921 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 327 flow [2023-08-30 05:20:17,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=327, PETRI_PLACES=76, PETRI_TRANSITIONS=90} [2023-08-30 05:20:17,922 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -5 predicate places. [2023-08-30 05:20:17,922 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 327 flow [2023-08-30 05:20:17,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 306.5) internal successors, (1226), 4 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 05:20:17,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:20:17,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 05:20:17,947 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 05:20:18,145 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 05:20:18,145 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 05:20:18,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:20:18,146 INFO L85 PathProgramCache]: Analyzing trace with hash 98529699, now seen corresponding path program 1 times [2023-08-30 05:20:18,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:20:18,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597439541] [2023-08-30 05:20:18,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:20:18,146 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 05:20:18,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:20:18,147 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 05:20:18,150 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 05:20:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:20:18,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 05:20:18,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:20:18,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:20:18,343 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 05:20:18,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-30 05:20:18,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:20:18,533 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-08-30 05:20:18,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2023-08-30 05:20:18,772 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-30 05:20:18,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 05:20:18,854 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 05:20:18,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:20:18,854 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:20:18,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597439541] [2023-08-30 05:20:18,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [597439541] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:20:18,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:20:18,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:20:18,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790098095] [2023-08-30 05:20:18,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:20:18,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:20:18,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:20:18,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:20:18,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:20:19,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 706 [2023-08-30 05:20:19,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 306.5) internal successors, (1226), 4 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 05:20:19,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:20:19,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 706 [2023-08-30 05:20:19,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:20:23,531 INFO L130 PetriNetUnfolder]: 31036/42403 cut-off events. [2023-08-30 05:20:23,531 INFO L131 PetriNetUnfolder]: For 282/282 co-relation queries the response was YES. [2023-08-30 05:20:23,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85523 conditions, 42403 events. 31036/42403 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 1967. Compared 250489 event pairs, 23799 based on Foata normal form. 0/16391 useless extension candidates. Maximal degree in co-relation 85507. Up to 42403 conditions per place. [2023-08-30 05:20:23,696 INFO L137 encePairwiseOnDemand]: 703/706 looper letters, 87 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2023-08-30 05:20:23,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 88 transitions, 499 flow [2023-08-30 05:20:23,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:20:23,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:20:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 983 transitions. [2023-08-30 05:20:23,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46411709159584513 [2023-08-30 05:20:23,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 983 transitions. [2023-08-30 05:20:23,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 983 transitions. [2023-08-30 05:20:23,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:20:23,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 983 transitions. [2023-08-30 05:20:23,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.6666666666667) internal successors, (983), 3 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:23,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:23,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:23,704 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 327 flow. Second operand 3 states and 983 transitions. [2023-08-30 05:20:23,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 88 transitions, 499 flow [2023-08-30 05:20:23,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 88 transitions, 498 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:20:23,706 INFO L231 Difference]: Finished difference. Result has 75 places, 88 transitions, 324 flow [2023-08-30 05:20:23,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=75, PETRI_TRANSITIONS=88} [2023-08-30 05:20:23,707 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -6 predicate places. [2023-08-30 05:20:23,707 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 88 transitions, 324 flow [2023-08-30 05:20:23,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 306.5) internal successors, (1226), 4 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 05:20:23,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:20:23,707 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 05:20:23,714 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 (8)] Ended with exit code 0 [2023-08-30 05:20:23,914 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 05:20:23,914 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 05:20:23,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:20:23,915 INFO L85 PathProgramCache]: Analyzing trace with hash 28048687, now seen corresponding path program 2 times [2023-08-30 05:20:23,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:20:23,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177689636] [2023-08-30 05:20:23,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:20:23,915 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 05:20:23,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:20:23,916 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 05:20:23,918 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 05:20:24,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:20:24,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:20:24,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 05:20:24,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:20:24,088 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:20:24,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 05:20:24,195 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 05:20:24,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:20:24,620 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 05:20:24,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:20:24,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177689636] [2023-08-30 05:20:24,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177689636] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:20:24,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:20:24,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 05:20:24,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442236377] [2023-08-30 05:20:24,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:20:24,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 05:20:24,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:20:24,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 05:20:24,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 05:20:30,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 706 [2023-08-30 05:20:30,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 88 transitions, 324 flow. Second operand has 12 states, 12 states have (on average 287.0) internal successors, (3444), 12 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:30,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:20:30,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 706 [2023-08-30 05:20:30,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:20:33,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:20:35,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:20:36,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:20:38,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:20:40,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:20:42,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:20:44,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:20:45,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:20:47,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:20:49,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:20:50,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:20:52,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:20:53,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:20:54,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:20:56,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:21:00,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:21:14,865 INFO L130 PetriNetUnfolder]: 93092/127177 cut-off events. [2023-08-30 05:21:14,865 INFO L131 PetriNetUnfolder]: For 870/870 co-relation queries the response was YES. [2023-08-30 05:21:15,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256418 conditions, 127177 events. 93092/127177 cut-off events. For 870/870 co-relation queries the response was YES. Maximal size of possible extension queue 4024. Compared 825908 event pairs, 71397 based on Foata normal form. 12/49145 useless extension candidates. Maximal degree in co-relation 256401. Up to 14147 conditions per place. [2023-08-30 05:21:15,548 INFO L137 encePairwiseOnDemand]: 696/706 looper letters, 523 selfloop transitions, 51 changer transitions 0/574 dead transitions. [2023-08-30 05:21:15,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 574 transitions, 2660 flow [2023-08-30 05:21:15,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 05:21:15,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 05:21:15,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 5162 transitions. [2023-08-30 05:21:15,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4569759206798867 [2023-08-30 05:21:15,562 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 5162 transitions. [2023-08-30 05:21:15,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 5162 transitions. [2023-08-30 05:21:15,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:21:15,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 5162 transitions. [2023-08-30 05:21:15,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 322.625) internal successors, (5162), 16 states have internal predecessors, (5162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:15,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 706.0) internal successors, (12002), 17 states have internal predecessors, (12002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:15,627 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 706.0) internal successors, (12002), 17 states have internal predecessors, (12002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:15,627 INFO L175 Difference]: Start difference. First operand has 75 places, 88 transitions, 324 flow. Second operand 16 states and 5162 transitions. [2023-08-30 05:21:15,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 574 transitions, 2660 flow [2023-08-30 05:21:15,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 574 transitions, 2659 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:21:15,633 INFO L231 Difference]: Finished difference. Result has 98 places, 118 transitions, 687 flow [2023-08-30 05:21:15,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=687, PETRI_PLACES=98, PETRI_TRANSITIONS=118} [2023-08-30 05:21:15,635 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 17 predicate places. [2023-08-30 05:21:15,635 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 118 transitions, 687 flow [2023-08-30 05:21:15,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 287.0) internal successors, (3444), 12 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:15,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:21:15,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:21:15,645 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 (9)] Ended with exit code 0 [2023-08-30 05:21:15,844 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 05:21:15,845 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 05:21:15,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:21:15,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1240547096, now seen corresponding path program 1 times [2023-08-30 05:21:15,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:21:15,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911724662] [2023-08-30 05:21:15,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:21:15,847 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 05:21:15,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:21:15,863 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 05:21:15,885 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 05:21:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:21:15,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:21:15,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:21:16,004 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 05:21:16,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:21:16,004 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:21:16,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911724662] [2023-08-30 05:21:16,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911724662] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:21:16,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:21:16,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:21:16,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682586314] [2023-08-30 05:21:16,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:21:16,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:21:16,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:21:16,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:21:16,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:21:16,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 706 [2023-08-30 05:21:16,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 118 transitions, 687 flow. Second operand has 5 states, 5 states have (on average 297.4) internal successors, (1487), 5 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:16,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:21:16,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 706 [2023-08-30 05:21:16,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:21:31,623 INFO L130 PetriNetUnfolder]: 123514/170846 cut-off events. [2023-08-30 05:21:31,624 INFO L131 PetriNetUnfolder]: For 1825/1825 co-relation queries the response was YES. [2023-08-30 05:21:32,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344600 conditions, 170846 events. 123514/170846 cut-off events. For 1825/1825 co-relation queries the response was YES. Maximal size of possible extension queue 5140. Compared 1184153 event pairs, 82530 based on Foata normal form. 0/69859 useless extension candidates. Maximal degree in co-relation 344573. Up to 127176 conditions per place. [2023-08-30 05:21:32,951 INFO L137 encePairwiseOnDemand]: 697/706 looper letters, 234 selfloop transitions, 4 changer transitions 0/238 dead transitions. [2023-08-30 05:21:32,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 238 transitions, 1679 flow [2023-08-30 05:21:32,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:21:32,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:21:32,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1641 transitions. [2023-08-30 05:21:32,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46487252124645895 [2023-08-30 05:21:32,954 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1641 transitions. [2023-08-30 05:21:32,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1641 transitions. [2023-08-30 05:21:32,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:21:32,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1641 transitions. [2023-08-30 05:21:32,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 328.2) internal successors, (1641), 5 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:32,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 706.0) internal successors, (4236), 6 states have internal predecessors, (4236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:32,964 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 706.0) internal successors, (4236), 6 states have internal predecessors, (4236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:32,964 INFO L175 Difference]: Start difference. First operand has 98 places, 118 transitions, 687 flow. Second operand 5 states and 1641 transitions. [2023-08-30 05:21:32,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 238 transitions, 1679 flow [2023-08-30 05:21:32,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 238 transitions, 1526 flow, removed 35 selfloop flow, removed 4 redundant places. [2023-08-30 05:21:32,969 INFO L231 Difference]: Finished difference. Result has 100 places, 119 transitions, 614 flow [2023-08-30 05:21:32,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=614, PETRI_PLACES=100, PETRI_TRANSITIONS=119} [2023-08-30 05:21:32,970 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 19 predicate places. [2023-08-30 05:21:32,970 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 119 transitions, 614 flow [2023-08-30 05:21:32,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 297.4) internal successors, (1487), 5 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:32,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:21:32,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:21:32,978 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 05:21:33,177 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 05:21:33,178 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 05:21:33,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:21:33,179 INFO L85 PathProgramCache]: Analyzing trace with hash 197788540, now seen corresponding path program 1 times [2023-08-30 05:21:33,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:21:33,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606352705] [2023-08-30 05:21:33,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:21:33,179 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 05:21:33,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:21:33,180 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 05:21:33,184 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 05:21:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:21:33,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 05:21:33,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:21:33,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:21:33,411 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-08-30 05:21:33,412 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 15 treesize of output 38 [2023-08-30 05:21:33,423 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 130 treesize of output 126 [2023-08-30 05:21:33,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:21:33,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:21:33,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:21:33,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:21:33,559 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 05:21:33,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:21:33,560 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:21:33,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606352705] [2023-08-30 05:21:33,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606352705] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:21:33,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:21:33,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:21:33,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469354554] [2023-08-30 05:21:33,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:21:33,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:21:33,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:21:33,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:21:33,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:21:33,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 706 [2023-08-30 05:21:33,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 119 transitions, 614 flow. Second operand has 5 states, 5 states have (on average 304.6) internal successors, (1523), 5 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:33,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:21:33,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 706 [2023-08-30 05:21:33,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:21:49,438 INFO L130 PetriNetUnfolder]: 118312/163187 cut-off events. [2023-08-30 05:21:49,438 INFO L131 PetriNetUnfolder]: For 13440/13440 co-relation queries the response was YES. [2023-08-30 05:21:50,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346475 conditions, 163187 events. 118312/163187 cut-off events. For 13440/13440 co-relation queries the response was YES. Maximal size of possible extension queue 4961. Compared 1108206 event pairs, 91656 based on Foata normal form. 0/74600 useless extension candidates. Maximal degree in co-relation 346445. Up to 163187 conditions per place. [2023-08-30 05:21:50,852 INFO L137 encePairwiseOnDemand]: 703/706 looper letters, 116 selfloop transitions, 1 changer transitions 0/117 dead transitions. [2023-08-30 05:21:50,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 117 transitions, 844 flow [2023-08-30 05:21:50,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:21:50,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:21:50,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 975 transitions. [2023-08-30 05:21:50,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603399433427762 [2023-08-30 05:21:50,855 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 975 transitions. [2023-08-30 05:21:50,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 975 transitions. [2023-08-30 05:21:50,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:21:50,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 975 transitions. [2023-08-30 05:21:50,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:50,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:50,859 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:50,859 INFO L175 Difference]: Start difference. First operand has 100 places, 119 transitions, 614 flow. Second operand 3 states and 975 transitions. [2023-08-30 05:21:50,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 117 transitions, 844 flow [2023-08-30 05:21:50,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 117 transitions, 838 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 05:21:50,872 INFO L231 Difference]: Finished difference. Result has 99 places, 117 transitions, 606 flow [2023-08-30 05:21:50,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=606, PETRI_PLACES=99, PETRI_TRANSITIONS=117} [2023-08-30 05:21:50,872 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 18 predicate places. [2023-08-30 05:21:50,873 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 117 transitions, 606 flow [2023-08-30 05:21:50,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 304.6) internal successors, (1523), 5 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:50,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:21:50,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:21:50,901 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 (11)] Ended with exit code 0 [2023-08-30 05:21:51,080 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 05:21:51,081 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 05:21:51,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:21:51,081 INFO L85 PathProgramCache]: Analyzing trace with hash 197788542, now seen corresponding path program 1 times [2023-08-30 05:21:51,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:21:51,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268483640] [2023-08-30 05:21:51,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:21:51,082 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 05:21:51,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:21:51,083 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 05:21:51,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 05:21:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:21:51,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 05:21:51,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:21:51,230 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 05:21:51,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-30 05:21:51,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:21:51,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 05:21:51,285 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 05:21:51,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 05:21:51,342 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 05:21:51,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:21:51,343 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:21:51,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268483640] [2023-08-30 05:21:51,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268483640] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:21:51,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:21:51,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:21:51,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352543505] [2023-08-30 05:21:51,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:21:51,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:21:51,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:21:51,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:21:51,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:21:51,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 706 [2023-08-30 05:21:51,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 117 transitions, 606 flow. Second operand has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:51,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:21:51,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 706 [2023-08-30 05:21:51,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:22:05,970 INFO L130 PetriNetUnfolder]: 113110/155528 cut-off events. [2023-08-30 05:22:05,970 INFO L131 PetriNetUnfolder]: For 12821/12821 co-relation queries the response was YES. [2023-08-30 05:22:06,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330147 conditions, 155528 events. 113110/155528 cut-off events. For 12821/12821 co-relation queries the response was YES. Maximal size of possible extension queue 4747. Compared 1044318 event pairs, 87372 based on Foata normal form. 0/72476 useless extension candidates. Maximal degree in co-relation 330116. Up to 155528 conditions per place. [2023-08-30 05:22:07,299 INFO L137 encePairwiseOnDemand]: 703/706 looper letters, 114 selfloop transitions, 1 changer transitions 0/115 dead transitions. [2023-08-30 05:22:07,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 115 transitions, 832 flow [2023-08-30 05:22:07,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:22:07,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:22:07,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 967 transitions. [2023-08-30 05:22:07,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45656279508970726 [2023-08-30 05:22:07,303 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 967 transitions. [2023-08-30 05:22:07,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 967 transitions. [2023-08-30 05:22:07,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:22:07,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 967 transitions. [2023-08-30 05:22:07,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 322.3333333333333) internal successors, (967), 3 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:07,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:07,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 706.0) internal successors, (2824), 4 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:07,315 INFO L175 Difference]: Start difference. First operand has 99 places, 117 transitions, 606 flow. Second operand 3 states and 967 transitions. [2023-08-30 05:22:07,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 115 transitions, 832 flow [2023-08-30 05:22:07,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 115 transitions, 831 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:22:07,327 INFO L231 Difference]: Finished difference. Result has 98 places, 115 transitions, 603 flow [2023-08-30 05:22:07,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=603, PETRI_PLACES=98, PETRI_TRANSITIONS=115} [2023-08-30 05:22:07,328 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 17 predicate places. [2023-08-30 05:22:07,328 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 115 transitions, 603 flow [2023-08-30 05:22:07,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:07,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:22:07,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:22:07,349 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 05:22:07,537 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 05:22:07,538 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 05:22:07,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:22:07,538 INFO L85 PathProgramCache]: Analyzing trace with hash -924909055, now seen corresponding path program 1 times [2023-08-30 05:22:07,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:22:07,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842886277] [2023-08-30 05:22:07,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:22:07,539 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 05:22:07,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:22:07,540 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 05:22:07,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 05:22:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:22:07,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:22:07,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:22:07,700 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 05:22:07,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:22:07,700 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:22:07,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842886277] [2023-08-30 05:22:07,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842886277] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:22:07,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:22:07,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:22:07,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429091798] [2023-08-30 05:22:07,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:22:07,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:22:07,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:22:07,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:22:07,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:22:07,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 706 [2023-08-30 05:22:07,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 115 transitions, 603 flow. Second operand has 5 states, 5 states have (on average 297.6) internal successors, (1488), 5 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:07,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:22:07,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 706 [2023-08-30 05:22:07,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:22:29,211 INFO L130 PetriNetUnfolder]: 169540/235902 cut-off events. [2023-08-30 05:22:29,211 INFO L131 PetriNetUnfolder]: For 22644/22644 co-relation queries the response was YES. [2023-08-30 05:22:30,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498214 conditions, 235902 events. 169540/235902 cut-off events. For 22644/22644 co-relation queries the response was YES. Maximal size of possible extension queue 7217. Compared 1732414 event pairs, 107982 based on Foata normal form. 2034/118092 useless extension candidates. Maximal degree in co-relation 498182. Up to 155516 conditions per place. [2023-08-30 05:22:31,022 INFO L137 encePairwiseOnDemand]: 697/706 looper letters, 190 selfloop transitions, 15 changer transitions 0/205 dead transitions. [2023-08-30 05:22:31,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 205 transitions, 1298 flow [2023-08-30 05:22:31,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:22:31,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:22:31,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1626 transitions. [2023-08-30 05:22:31,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4606232294617564 [2023-08-30 05:22:31,025 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1626 transitions. [2023-08-30 05:22:31,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1626 transitions. [2023-08-30 05:22:31,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:22:31,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1626 transitions. [2023-08-30 05:22:31,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 325.2) internal successors, (1626), 5 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:31,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 706.0) internal successors, (4236), 6 states have internal predecessors, (4236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:31,030 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 706.0) internal successors, (4236), 6 states have internal predecessors, (4236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:31,031 INFO L175 Difference]: Start difference. First operand has 98 places, 115 transitions, 603 flow. Second operand 5 states and 1626 transitions. [2023-08-30 05:22:31,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 205 transitions, 1298 flow [2023-08-30 05:22:31,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 205 transitions, 1297 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:22:31,080 INFO L231 Difference]: Finished difference. Result has 103 places, 117 transitions, 661 flow [2023-08-30 05:22:31,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=706, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=661, PETRI_PLACES=103, PETRI_TRANSITIONS=117} [2023-08-30 05:22:31,081 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 22 predicate places. [2023-08-30 05:22:31,081 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 117 transitions, 661 flow [2023-08-30 05:22:31,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 297.6) internal successors, (1488), 5 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:31,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:22:31,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:22:31,110 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 05:22:31,288 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 05:22:31,289 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 05:22:31,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:22:31,289 INFO L85 PathProgramCache]: Analyzing trace with hash 146499268, now seen corresponding path program 1 times [2023-08-30 05:22:31,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:22:31,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023426387] [2023-08-30 05:22:31,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:22:31,290 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 05:22:31,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:22:31,291 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 05:22:31,297 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 05:22:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:22:31,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 05:22:31,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:22:31,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 05:22:31,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 05:22:31,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:22:31,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 05:22:31,539 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:22:31,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 05:22:31,597 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 05:22:31,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:22:33,948 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 05:22:33,948 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:22:33,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023426387] [2023-08-30 05:22:33,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023426387] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:22:33,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:22:33,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 05:22:33,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918613310] [2023-08-30 05:22:33,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:22:33,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:22:33,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:22:33,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:22:33,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 05:22:41,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 706 [2023-08-30 05:22:41,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 117 transitions, 661 flow. Second operand has 10 states, 10 states have (on average 269.6) internal successors, (2696), 10 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:41,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:22:41,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 706 [2023-08-30 05:22:41,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand