./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-array-int-symm.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 b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:28:01,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:28:01,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:28:01,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:28:01,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:28:01,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:28:01,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:28:01,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:28:01,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:28:01,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:28:01,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:28:01,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:28:01,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:28:01,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:28:01,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:28:01,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:28:01,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:28:01,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:28:01,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:28:01,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:28:01,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:28:01,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:28:01,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:28:01,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:28:01,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:28:01,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:28:01,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:28:01,282 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:28:01,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:28:01,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:28:01,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:28:01,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:28:01,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:28:01,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:28:01,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:28:01,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:28:01,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:28:01,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:28:01,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:28:01,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:28:01,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:28:01,295 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 01:28:01,313 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:28:01,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:28:01,315 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:28:01,315 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:28:01,316 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:28:01,316 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:28:01,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:28:01,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:28:01,316 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:28:01,316 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:28:01,317 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:28:01,317 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:28:01,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:28:01,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:28:01,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:28:01,318 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:28:01,318 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:28:01,318 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:28:01,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:28:01,318 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:28:01,318 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:28:01,319 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:28:01,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:28:01,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:28:01,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:28:01,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:28:01,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:28:01,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:28:01,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 01:28:01,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 01:28:01,320 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:28:01,320 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:28:01,320 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:28:01,320 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:28:01,320 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:28:01,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:28:01,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:28:01,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:28:01,550 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:28:01,550 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:28:01,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2023-09-01 01:28:02,330 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:28:02,525 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:28:02,525 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2023-09-01 01:28:02,531 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89c26b5d7/b191a3d1b52342d6993f463ed9c5ee64/FLAGd41c3b461 [2023-09-01 01:28:02,551 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89c26b5d7/b191a3d1b52342d6993f463ed9c5ee64 [2023-09-01 01:28:02,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:28:02,554 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:28:02,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:28:02,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:28:02,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:28:02,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:28:02" (1/1) ... [2023-09-01 01:28:02,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@162561b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:02, skipping insertion in model container [2023-09-01 01:28:02,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:28:02" (1/1) ... [2023-09-01 01:28:02,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:28:02,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:28:02,722 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-array-int-symm.wvr.c[2482,2495] [2023-09-01 01:28:02,734 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:28:02,742 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 01:28:02,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@36fdf6aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:02, skipping insertion in model container [2023-09-01 01:28:02,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:28:02,745 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 01:28:02,746 INFO L158 Benchmark]: Toolchain (without parser) took 191.42ms. Allocated memory is still 69.2MB. Free memory was 46.5MB in the beginning and 36.6MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 01:28:02,746 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 56.6MB. Free memory is still 34.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 01:28:02,747 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.00ms. Allocated memory is still 69.2MB. Free memory was 46.3MB in the beginning and 36.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 01:28:02,748 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 56.6MB. Free memory is still 34.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 190.00ms. Allocated memory is still 69.2MB. Free memory was 46.3MB in the beginning and 36.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: 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-array-int-symm.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 b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:28:04,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:28:04,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:28:04,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:28:04,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:28:04,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:28:04,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:28:04,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:28:04,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:28:04,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:28:04,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:28:04,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:28:04,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:28:04,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:28:04,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:28:04,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:28:04,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:28:04,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:28:04,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:28:04,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:28:04,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:28:04,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:28:04,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:28:04,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:28:04,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:28:04,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:28:04,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:28:04,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:28:04,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:28:04,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:28:04,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:28:04,113 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:28:04,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:28:04,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:28:04,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:28:04,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:28:04,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:28:04,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:28:04,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:28:04,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:28:04,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:28:04,119 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 01:28:04,147 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:28:04,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:28:04,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:28:04,148 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:28:04,149 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:28:04,149 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:28:04,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:28:04,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:28:04,150 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:28:04,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:28:04,151 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:28:04,151 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:28:04,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:28:04,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:28:04,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:28:04,151 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:28:04,152 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:28:04,152 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:28:04,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:28:04,152 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:28:04,152 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 01:28:04,152 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 01:28:04,153 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:28:04,153 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:28:04,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:28:04,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:28:04,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:28:04,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:28:04,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:28:04,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:28:04,154 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 01:28:04,154 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 01:28:04,154 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:28:04,154 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:28:04,154 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:28:04,155 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 01:28:04,155 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:28:04,155 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:28:04,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:28:04,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:28:04,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:28:04,413 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:28:04,413 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:28:04,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2023-09-01 01:28:05,356 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:28:05,514 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:28:05,515 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2023-09-01 01:28:05,519 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45f2e4232/ac92d050b691442c92d7b47cba63d48e/FLAGafb69fbbc [2023-09-01 01:28:05,528 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45f2e4232/ac92d050b691442c92d7b47cba63d48e [2023-09-01 01:28:05,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:28:05,530 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:28:05,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:28:05,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:28:05,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:28:05,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:28:05" (1/1) ... [2023-09-01 01:28:05,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58fb2ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:05, skipping insertion in model container [2023-09-01 01:28:05,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:28:05" (1/1) ... [2023-09-01 01:28:05,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:28:05,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:28:05,656 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-array-int-symm.wvr.c[2482,2495] [2023-09-01 01:28:05,674 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:28:05,685 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 01:28:05,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:28:05,700 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-array-int-symm.wvr.c[2482,2495] [2023-09-01 01:28:05,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:28:05,710 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 01:28:05,723 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-array-int-symm.wvr.c[2482,2495] [2023-09-01 01:28:05,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:28:05,736 INFO L208 MainTranslator]: Completed translation [2023-09-01 01:28:05,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:05 WrapperNode [2023-09-01 01:28:05,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:28:05,738 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 01:28:05,738 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 01:28:05,738 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 01:28:05,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:05" (1/1) ... [2023-09-01 01:28:05,749 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:05" (1/1) ... [2023-09-01 01:28:05,766 INFO L138 Inliner]: procedures = 27, calls = 39, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 196 [2023-09-01 01:28:05,767 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 01:28:05,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 01:28:05,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 01:28:05,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 01:28:05,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:05" (1/1) ... [2023-09-01 01:28:05,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:05" (1/1) ... [2023-09-01 01:28:05,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:05" (1/1) ... [2023-09-01 01:28:05,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:05" (1/1) ... [2023-09-01 01:28:05,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:05" (1/1) ... [2023-09-01 01:28:05,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:05" (1/1) ... [2023-09-01 01:28:05,787 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:05" (1/1) ... [2023-09-01 01:28:05,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:05" (1/1) ... [2023-09-01 01:28:05,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 01:28:05,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 01:28:05,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 01:28:05,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 01:28:05,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:05" (1/1) ... [2023-09-01 01:28:05,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:28:05,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:28:05,828 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 01:28:05,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 01:28:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 01:28:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 01:28:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 01:28:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 01:28:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 01:28:05,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 01:28:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 01:28:05,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 01:28:05,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 01:28:05,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 01:28:05,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 01:28:05,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 01:28:05,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 01:28:05,862 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 01:28:06,000 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 01:28:06,001 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 01:28:06,377 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 01:28:06,386 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 01:28:06,387 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 01:28:06,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:28:06 BoogieIcfgContainer [2023-09-01 01:28:06,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 01:28:06,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 01:28:06,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 01:28:06,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 01:28:06,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:28:05" (1/3) ... [2023-09-01 01:28:06,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c409f8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:28:06, skipping insertion in model container [2023-09-01 01:28:06,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:05" (2/3) ... [2023-09-01 01:28:06,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c409f8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:28:06, skipping insertion in model container [2023-09-01 01:28:06,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:28:06" (3/3) ... [2023-09-01 01:28:06,394 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2023-09-01 01:28:06,404 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 01:28:06,404 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-09-01 01:28:06,405 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 01:28:06,503 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 01:28:06,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 257 transitions, 530 flow [2023-09-01 01:28:06,609 INFO L130 PetriNetUnfolder]: 21/255 cut-off events. [2023-09-01 01:28:06,609 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 01:28:06,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 255 events. 21/255 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 483 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 162. Up to 3 conditions per place. [2023-09-01 01:28:06,621 INFO L82 GeneralOperation]: Start removeDead. Operand has 243 places, 257 transitions, 530 flow [2023-09-01 01:28:06,628 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 251 transitions, 514 flow [2023-09-01 01:28:06,631 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 01:28:06,642 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 251 transitions, 514 flow [2023-09-01 01:28:06,643 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 251 transitions, 514 flow [2023-09-01 01:28:06,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 251 transitions, 514 flow [2023-09-01 01:28:06,692 INFO L130 PetriNetUnfolder]: 21/251 cut-off events. [2023-09-01 01:28:06,692 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 01:28:06,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 251 events. 21/251 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 479 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 162. Up to 3 conditions per place. [2023-09-01 01:28:06,696 INFO L119 LiptonReduction]: Number of co-enabled transitions 7548 [2023-09-01 01:28:27,542 INFO L134 LiptonReduction]: Checked pairs total: 10913 [2023-09-01 01:28:27,542 INFO L136 LiptonReduction]: Total number of compositions: 306 [2023-09-01 01:28:27,551 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 01:28:27,554 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;@bfb08ff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 01:28:27,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-09-01 01:28:27,556 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 01:28:27,557 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:28:27,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:28:27,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:28:27,557 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:28:27,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:28:27,560 INFO L85 PathProgramCache]: Analyzing trace with hash 33261, now seen corresponding path program 1 times [2023-09-01 01:28:27,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:28:27,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391360633] [2023-09-01 01:28:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:28:27,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:27,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:28:27,570 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:28:27,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 01:28:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:28:27,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 01:28:27,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:28:27,710 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:28:27,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:28:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:28:27,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:28:27,726 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:28:27,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391360633] [2023-09-01 01:28:27,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391360633] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:28:27,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:28:27,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:28:27,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132861843] [2023-09-01 01:28:27,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:28:27,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:28:27,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:28:27,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:28:27,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:28:27,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 563 [2023-09-01 01:28:27,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:27,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:28:27,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 563 [2023-09-01 01:28:27,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:28:28,229 INFO L130 PetriNetUnfolder]: 805/1290 cut-off events. [2023-09-01 01:28:28,230 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-09-01 01:28:28,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2622 conditions, 1290 events. 805/1290 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 6156 event pairs, 679 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 2472. Up to 1290 conditions per place. [2023-09-01 01:28:28,236 INFO L137 encePairwiseOnDemand]: 555/563 looper letters, 44 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-09-01 01:28:28,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 45 transitions, 192 flow [2023-09-01 01:28:28,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:28:28,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:28:28,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 733 transitions. [2023-09-01 01:28:28,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339846062759029 [2023-09-01 01:28:28,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 733 transitions. [2023-09-01 01:28:28,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 733 transitions. [2023-09-01 01:28:28,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:28:28,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 733 transitions. [2023-09-01 01:28:28,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:28,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:28,258 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:28,259 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 116 flow. Second operand 3 states and 733 transitions. [2023-09-01 01:28:28,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 45 transitions, 192 flow [2023-09-01 01:28:28,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 184 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 01:28:28,262 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 96 flow [2023-09-01 01:28:28,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-09-01 01:28:28,266 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-09-01 01:28:28,266 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 96 flow [2023-09-01 01:28:28,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:28,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:28:28,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:28:28,274 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 [2023-09-01 01:28:28,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:28,475 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:28:28,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:28:28,476 INFO L85 PathProgramCache]: Analyzing trace with hash 33262, now seen corresponding path program 1 times [2023-09-01 01:28:28,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:28:28,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948242512] [2023-09-01 01:28:28,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:28:28,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:28,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:28:28,478 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:28:28,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 01:28:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:28:28,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:28:28,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:28:28,600 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:28:28,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 01:28:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:28:28,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:28:28,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:28:28,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948242512] [2023-09-01 01:28:28,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948242512] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:28:28,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:28:28,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:28:28,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037976079] [2023-09-01 01:28:28,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:28:28,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:28:28,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:28:28,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:28:28,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:28:28,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 563 [2023-09-01 01:28:28,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:28,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:28:28,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 563 [2023-09-01 01:28:28,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:28:29,309 INFO L130 PetriNetUnfolder]: 1609/2577 cut-off events. [2023-09-01 01:28:29,309 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 01:28:29,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5188 conditions, 2577 events. 1609/2577 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 13992 event pairs, 1358 based on Foata normal form. 0/851 useless extension candidates. Maximal degree in co-relation 5182. Up to 1291 conditions per place. [2023-09-01 01:28:29,318 INFO L137 encePairwiseOnDemand]: 557/563 looper letters, 83 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-09-01 01:28:29,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 87 transitions, 358 flow [2023-09-01 01:28:29,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:28:29,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:28:29,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 770 transitions. [2023-09-01 01:28:29,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45589105979869743 [2023-09-01 01:28:29,320 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 770 transitions. [2023-09-01 01:28:29,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 770 transitions. [2023-09-01 01:28:29,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:28:29,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 770 transitions. [2023-09-01 01:28:29,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:29,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:29,325 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:29,325 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 96 flow. Second operand 3 states and 770 transitions. [2023-09-01 01:28:29,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 87 transitions, 358 flow [2023-09-01 01:28:29,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 87 transitions, 357 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:28:29,327 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 127 flow [2023-09-01 01:28:29,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-09-01 01:28:29,327 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -6 predicate places. [2023-09-01 01:28:29,328 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 127 flow [2023-09-01 01:28:29,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:29,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:28:29,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:28:29,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 01:28:29,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:29,535 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:28:29,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:28:29,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1035598, now seen corresponding path program 1 times [2023-09-01 01:28:29,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:28:29,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [942594963] [2023-09-01 01:28:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:28:29,540 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:29,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:28:29,541 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:28:29,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 01:28:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:28:29,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:28:29,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:28:29,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:28:29,633 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-09-01 01:28:29,633 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 3 case distinctions, treesize of input 22 treesize of output 33 [2023-09-01 01:28:29,681 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:28:29,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:28:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:28:29,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:28:29,692 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:28:29,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [942594963] [2023-09-01 01:28:29,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [942594963] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:28:29,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:28:29,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:28:29,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070742278] [2023-09-01 01:28:29,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:28:29,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:28:29,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:28:29,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:28:29,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:28:29,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 563 [2023-09-01 01:28:29,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:29,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:28:29,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 563 [2023-09-01 01:28:29,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:28:30,177 INFO L130 PetriNetUnfolder]: 1203/1973 cut-off events. [2023-09-01 01:28:30,177 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 01:28:30,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3994 conditions, 1973 events. 1203/1973 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 10465 event pairs, 1008 based on Foata normal form. 0/729 useless extension candidates. Maximal degree in co-relation 3985. Up to 1973 conditions per place. [2023-09-01 01:28:30,184 INFO L137 encePairwiseOnDemand]: 560/563 looper letters, 45 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-09-01 01:28:30,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 215 flow [2023-09-01 01:28:30,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:28:30,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:28:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 735 transitions. [2023-09-01 01:28:30,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4351687388987567 [2023-09-01 01:28:30,186 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 735 transitions. [2023-09-01 01:28:30,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 735 transitions. [2023-09-01 01:28:30,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:28:30,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 735 transitions. [2023-09-01 01:28:30,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:30,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:30,191 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:30,191 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 127 flow. Second operand 3 states and 735 transitions. [2023-09-01 01:28:30,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 215 flow [2023-09-01 01:28:30,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 207 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:28:30,192 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 117 flow [2023-09-01 01:28:30,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-09-01 01:28:30,193 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -8 predicate places. [2023-09-01 01:28:30,193 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 117 flow [2023-09-01 01:28:30,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:30,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:28:30,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:28:30,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 01:28:30,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:30,400 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:28:30,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:28:30,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1033353, now seen corresponding path program 1 times [2023-09-01 01:28:30,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:28:30,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120424018] [2023-09-01 01:28:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:28:30,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:30,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:28:30,404 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:28:30,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 01:28:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:28:30,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:28:30,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:28:30,487 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:28:30,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 01:28:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:28:30,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:28:30,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:28:30,674 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:28:30,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120424018] [2023-09-01 01:28:30,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120424018] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:28:30,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:28:30,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 01:28:30,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066048587] [2023-09-01 01:28:30,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:28:30,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:28:30,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:28:30,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:28:30,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:28:31,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 563 [2023-09-01 01:28:31,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 117 flow. Second operand has 6 states, 6 states have (on average 218.0) internal successors, (1308), 6 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:31,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:28:31,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 563 [2023-09-01 01:28:31,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:28:32,500 INFO L130 PetriNetUnfolder]: 1810/2968 cut-off events. [2023-09-01 01:28:32,501 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-09-01 01:28:32,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6005 conditions, 2968 events. 1810/2968 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 16600 event pairs, 1512 based on Foata normal form. 0/1096 useless extension candidates. Maximal degree in co-relation 5996. Up to 988 conditions per place. [2023-09-01 01:28:32,511 INFO L137 encePairwiseOnDemand]: 555/563 looper letters, 116 selfloop transitions, 17 changer transitions 0/133 dead transitions. [2023-09-01 01:28:32,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 133 transitions, 583 flow [2023-09-01 01:28:32,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:28:32,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:28:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1441 transitions. [2023-09-01 01:28:32,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265837773830669 [2023-09-01 01:28:32,515 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1441 transitions. [2023-09-01 01:28:32,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1441 transitions. [2023-09-01 01:28:32,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:28:32,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1441 transitions. [2023-09-01 01:28:32,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 240.16666666666666) internal successors, (1441), 6 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:32,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 563.0) internal successors, (3941), 7 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:32,523 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 563.0) internal successors, (3941), 7 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:32,523 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 117 flow. Second operand 6 states and 1441 transitions. [2023-09-01 01:28:32,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 133 transitions, 583 flow [2023-09-01 01:28:32,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 133 transitions, 582 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:28:32,527 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 245 flow [2023-09-01 01:28:32,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=245, PETRI_PLACES=54, PETRI_TRANSITIONS=59} [2023-09-01 01:28:32,528 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2023-09-01 01:28:32,528 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 245 flow [2023-09-01 01:28:32,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 218.0) internal successors, (1308), 6 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:32,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:28:32,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:28:32,537 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 [2023-09-01 01:28:32,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:32,735 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:28:32,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:28:32,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1035600, now seen corresponding path program 1 times [2023-09-01 01:28:32,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:28:32,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354969780] [2023-09-01 01:28:32,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:28:32,740 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:32,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:28:32,741 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:28:32,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 01:28:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:28:32,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:28:32,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:28:32,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:28:32,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:28:32,838 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 01:28:32,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 01:28:32,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-09-01 01:28:32,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:28:32,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:28:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:28:32,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:28:32,903 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:28:32,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354969780] [2023-09-01 01:28:32,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354969780] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:28:32,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:28:32,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:28:32,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866989444] [2023-09-01 01:28:32,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:28:32,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:28:32,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:28:32,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:28:32,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:28:33,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 563 [2023-09-01 01:28:33,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 245 flow. Second operand has 4 states, 4 states have (on average 230.75) internal successors, (923), 4 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:33,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:28:33,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 563 [2023-09-01 01:28:33,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:28:33,472 INFO L130 PetriNetUnfolder]: 1199/2060 cut-off events. [2023-09-01 01:28:33,472 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-09-01 01:28:33,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4234 conditions, 2060 events. 1199/2060 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 11637 event pairs, 987 based on Foata normal form. 0/913 useless extension candidates. Maximal degree in co-relation 4220. Up to 2060 conditions per place. [2023-09-01 01:28:33,479 INFO L137 encePairwiseOnDemand]: 560/563 looper letters, 54 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-09-01 01:28:33,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 55 transitions, 335 flow [2023-09-01 01:28:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:28:33,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:28:33,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 733 transitions. [2023-09-01 01:28:33,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339846062759029 [2023-09-01 01:28:33,482 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 733 transitions. [2023-09-01 01:28:33,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 733 transitions. [2023-09-01 01:28:33,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:28:33,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 733 transitions. [2023-09-01 01:28:33,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:33,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:33,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:33,486 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 245 flow. Second operand 3 states and 733 transitions. [2023-09-01 01:28:33,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 55 transitions, 335 flow [2023-09-01 01:28:33,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 55 transitions, 316 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 01:28:33,491 INFO L231 Difference]: Finished difference. Result has 53 places, 55 transitions, 208 flow [2023-09-01 01:28:33,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=53, PETRI_TRANSITIONS=55} [2023-09-01 01:28:33,493 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2023-09-01 01:28:33,494 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 55 transitions, 208 flow [2023-09-01 01:28:33,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.75) internal successors, (923), 4 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:33,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:28:33,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 01:28:33,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 01:28:33,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:33,705 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:28:33,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:28:33,705 INFO L85 PathProgramCache]: Analyzing trace with hash 995233483, now seen corresponding path program 1 times [2023-09-01 01:28:33,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:28:33,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805842269] [2023-09-01 01:28:33,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:28:33,706 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:33,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:28:33,707 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:28:33,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 01:28:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:28:33,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 01:28:33,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:28:33,795 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-09-01 01:28:33,795 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 2 case distinctions, treesize of input 26 treesize of output 33 [2023-09-01 01:28:33,819 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:28:33,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:28:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:28:33,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:28:33,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:28:33,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805842269] [2023-09-01 01:28:33,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805842269] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:28:33,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:28:33,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:28:33,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890668033] [2023-09-01 01:28:33,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:28:33,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:28:33,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:28:33,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:28:33,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:28:33,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 563 [2023-09-01 01:28:33,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 55 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:33,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:28:33,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 563 [2023-09-01 01:28:33,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:28:34,230 INFO L130 PetriNetUnfolder]: 1133/1931 cut-off events. [2023-09-01 01:28:34,230 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-09-01 01:28:34,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3967 conditions, 1931 events. 1133/1931 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 10720 event pairs, 930 based on Foata normal form. 0/892 useless extension candidates. Maximal degree in co-relation 3952. Up to 1931 conditions per place. [2023-09-01 01:28:34,239 INFO L137 encePairwiseOnDemand]: 560/563 looper letters, 52 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-09-01 01:28:34,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 310 flow [2023-09-01 01:28:34,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:28:34,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:28:34,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 725 transitions. [2023-09-01 01:28:34,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42924807578448787 [2023-09-01 01:28:34,242 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 725 transitions. [2023-09-01 01:28:34,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 725 transitions. [2023-09-01 01:28:34,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:28:34,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 725 transitions. [2023-09-01 01:28:34,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:34,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:34,246 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:34,246 INFO L175 Difference]: Start difference. First operand has 53 places, 55 transitions, 208 flow. Second operand 3 states and 725 transitions. [2023-09-01 01:28:34,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 310 flow [2023-09-01 01:28:34,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 309 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:28:34,249 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 205 flow [2023-09-01 01:28:34,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-09-01 01:28:34,251 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2023-09-01 01:28:34,251 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 205 flow [2023-09-01 01:28:34,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:34,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:28:34,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 01:28:34,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-09-01 01:28:34,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:34,458 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:28:34,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:28:34,458 INFO L85 PathProgramCache]: Analyzing trace with hash 995233484, now seen corresponding path program 1 times [2023-09-01 01:28:34,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:28:34,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068051208] [2023-09-01 01:28:34,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:28:34,458 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:34,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:28:34,459 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:28:34,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 01:28:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:28:34,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:28:34,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:28:34,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:28:34,562 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-09-01 01:28:34,563 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 1 case distinctions, treesize of input 12 treesize of output 23 [2023-09-01 01:28:34,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-09-01 01:28:34,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:28:34,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:28:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:28:34,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:28:34,638 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:28:34,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068051208] [2023-09-01 01:28:34,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068051208] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:28:34,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:28:34,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:28:34,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994463647] [2023-09-01 01:28:34,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:28:34,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:28:34,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:28:34,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:28:34,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:28:34,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 563 [2023-09-01 01:28:34,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 229.25) internal successors, (917), 4 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:34,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:28:34,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 563 [2023-09-01 01:28:34,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:28:35,189 INFO L130 PetriNetUnfolder]: 1067/1802 cut-off events. [2023-09-01 01:28:35,189 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-09-01 01:28:35,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3710 conditions, 1802 events. 1067/1802 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 9817 event pairs, 873 based on Foata normal form. 0/871 useless extension candidates. Maximal degree in co-relation 3694. Up to 1802 conditions per place. [2023-09-01 01:28:35,195 INFO L137 encePairwiseOnDemand]: 560/563 looper letters, 50 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-09-01 01:28:35,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 51 transitions, 303 flow [2023-09-01 01:28:35,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:28:35,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:28:35,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 723 transitions. [2023-09-01 01:28:35,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280639431616341 [2023-09-01 01:28:35,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 723 transitions. [2023-09-01 01:28:35,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 723 transitions. [2023-09-01 01:28:35,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:28:35,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 723 transitions. [2023-09-01 01:28:35,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:35,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:35,201 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:35,201 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 205 flow. Second operand 3 states and 723 transitions. [2023-09-01 01:28:35,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 51 transitions, 303 flow [2023-09-01 01:28:35,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:28:35,203 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 202 flow [2023-09-01 01:28:35,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2023-09-01 01:28:35,203 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2023-09-01 01:28:35,203 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 202 flow [2023-09-01 01:28:35,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 229.25) internal successors, (917), 4 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:35,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:28:35,204 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 01:28:35,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 01:28:35,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:35,411 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:28:35,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:28:35,411 INFO L85 PathProgramCache]: Analyzing trace with hash 722063534, now seen corresponding path program 2 times [2023-09-01 01:28:35,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:28:35,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015625914] [2023-09-01 01:28:35,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:28:35,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:35,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:28:35,412 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:28:35,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 01:28:35,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:28:35,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:28:35,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:28:35,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:28:35,526 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:28:35,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 01:28:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:28:35,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:28:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:28:36,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:28:36,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015625914] [2023-09-01 01:28:36,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015625914] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:28:36,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:28:36,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:28:36,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824213564] [2023-09-01 01:28:36,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:28:36,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:28:36,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:28:36,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:28:36,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:28:39,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 563 [2023-09-01 01:28:39,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 202 flow. Second operand has 12 states, 12 states have (on average 220.0) internal successors, (2640), 12 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:39,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:28:39,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 563 [2023-09-01 01:28:39,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:28:44,058 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 [] [2023-09-01 01:28:45,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:28:47,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:28:48,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:28:53,355 INFO L130 PetriNetUnfolder]: 3543/5977 cut-off events. [2023-09-01 01:28:53,355 INFO L131 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2023-09-01 01:28:53,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12214 conditions, 5977 events. 3543/5977 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 37051 event pairs, 2910 based on Foata normal form. 12/2882 useless extension candidates. Maximal degree in co-relation 12197. Up to 980 conditions per place. [2023-09-01 01:28:53,373 INFO L137 encePairwiseOnDemand]: 556/563 looper letters, 315 selfloop transitions, 32 changer transitions 0/347 dead transitions. [2023-09-01 01:28:53,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 347 transitions, 1628 flow [2023-09-01 01:28:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 01:28:53,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 01:28:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2987 transitions. [2023-09-01 01:28:53,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44212551805802247 [2023-09-01 01:28:53,380 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2987 transitions. [2023-09-01 01:28:53,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2987 transitions. [2023-09-01 01:28:53,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:28:53,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2987 transitions. [2023-09-01 01:28:53,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 248.91666666666666) internal successors, (2987), 12 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:53,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 563.0) internal successors, (7319), 13 states have internal predecessors, (7319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:53,392 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 563.0) internal successors, (7319), 13 states have internal predecessors, (7319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:53,392 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 202 flow. Second operand 12 states and 2987 transitions. [2023-09-01 01:28:53,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 347 transitions, 1628 flow [2023-09-01 01:28:53,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 347 transitions, 1627 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:28:53,396 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 445 flow [2023-09-01 01:28:53,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=445, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2023-09-01 01:28:53,397 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2023-09-01 01:28:53,397 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 445 flow [2023-09-01 01:28:53,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 220.0) internal successors, (2640), 12 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:53,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:28:53,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 01:28:53,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 01:28:53,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:53,607 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:28:53,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:28:53,607 INFO L85 PathProgramCache]: Analyzing trace with hash 787464540, now seen corresponding path program 1 times [2023-09-01 01:28:53,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:28:53,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431892802] [2023-09-01 01:28:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:28:53,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:53,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:28:53,609 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:28:53,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 01:28:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:28:53,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:28:53,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:28:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:28:53,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:28:53,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:28:53,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431892802] [2023-09-01 01:28:53,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431892802] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:28:53,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:28:53,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:28:53,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230623686] [2023-09-01 01:28:53,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:28:53,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:28:53,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:28:53,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:28:53,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:28:53,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 563 [2023-09-01 01:28:53,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 445 flow. Second operand has 5 states, 5 states have (on average 225.2) internal successors, (1126), 5 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:53,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:28:53,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 563 [2023-09-01 01:28:53,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:28:54,860 INFO L130 PetriNetUnfolder]: 4224/7320 cut-off events. [2023-09-01 01:28:54,860 INFO L131 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2023-09-01 01:28:54,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15098 conditions, 7320 events. 4224/7320 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 49002 event pairs, 2970 based on Foata normal form. 0/3819 useless extension candidates. Maximal degree in co-relation 15073. Up to 5976 conditions per place. [2023-09-01 01:28:54,883 INFO L137 encePairwiseOnDemand]: 554/563 looper letters, 109 selfloop transitions, 4 changer transitions 0/113 dead transitions. [2023-09-01 01:28:54,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 113 transitions, 883 flow [2023-09-01 01:28:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:28:54,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:28:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1194 transitions. [2023-09-01 01:28:54,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4241563055062167 [2023-09-01 01:28:54,886 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1194 transitions. [2023-09-01 01:28:54,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1194 transitions. [2023-09-01 01:28:54,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:28:54,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1194 transitions. [2023-09-01 01:28:54,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 238.8) internal successors, (1194), 5 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:54,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:54,892 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:54,892 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 445 flow. Second operand 5 states and 1194 transitions. [2023-09-01 01:28:54,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 113 transitions, 883 flow [2023-09-01 01:28:54,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 113 transitions, 800 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-09-01 01:28:54,897 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 411 flow [2023-09-01 01:28:54,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=411, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2023-09-01 01:28:54,898 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 16 predicate places. [2023-09-01 01:28:54,898 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 411 flow [2023-09-01 01:28:54,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.2) internal successors, (1126), 5 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:54,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:28:54,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:28:54,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 01:28:55,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:55,105 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:28:55,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:28:55,105 INFO L85 PathProgramCache]: Analyzing trace with hash 974536312, now seen corresponding path program 1 times [2023-09-01 01:28:55,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:28:55,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363672279] [2023-09-01 01:28:55,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:28:55,106 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:55,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:28:55,107 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:28:55,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 01:28:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:28:55,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:28:55,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:28:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:28:55,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:28:55,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:28:55,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363672279] [2023-09-01 01:28:55,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363672279] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:28:55,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:28:55,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:28:55,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51883081] [2023-09-01 01:28:55,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:28:55,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:28:55,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:28:55,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:28:55,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:28:55,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 563 [2023-09-01 01:28:55,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 411 flow. Second operand has 5 states, 5 states have (on average 225.4) internal successors, (1127), 5 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:55,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:28:55,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 563 [2023-09-01 01:28:55,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:28:56,390 INFO L130 PetriNetUnfolder]: 3939/6859 cut-off events. [2023-09-01 01:28:56,390 INFO L131 PetriNetUnfolder]: For 955/955 co-relation queries the response was YES. [2023-09-01 01:28:56,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15314 conditions, 6859 events. 3939/6859 cut-off events. For 955/955 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 45480 event pairs, 3171 based on Foata normal form. 16/3789 useless extension candidates. Maximal degree in co-relation 15286. Up to 6583 conditions per place. [2023-09-01 01:28:56,410 INFO L137 encePairwiseOnDemand]: 554/563 looper letters, 85 selfloop transitions, 15 changer transitions 0/100 dead transitions. [2023-09-01 01:28:56,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 100 transitions, 684 flow [2023-09-01 01:28:56,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:28:56,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:28:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1191 transitions. [2023-09-01 01:28:56,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230905861456483 [2023-09-01 01:28:56,413 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1191 transitions. [2023-09-01 01:28:56,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1191 transitions. [2023-09-01 01:28:56,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:28:56,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1191 transitions. [2023-09-01 01:28:56,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 238.2) internal successors, (1191), 5 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:56,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:56,419 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:56,419 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 411 flow. Second operand 5 states and 1191 transitions. [2023-09-01 01:28:56,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 100 transitions, 684 flow [2023-09-01 01:28:56,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 100 transitions, 678 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 01:28:56,426 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 485 flow [2023-09-01 01:28:56,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=485, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2023-09-01 01:28:56,426 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 22 predicate places. [2023-09-01 01:28:56,426 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 485 flow [2023-09-01 01:28:56,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.4) internal successors, (1127), 5 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:56,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:28:56,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:28:56,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 01:28:56,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:56,634 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:28:56,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:28:56,634 INFO L85 PathProgramCache]: Analyzing trace with hash 144461704, now seen corresponding path program 1 times [2023-09-01 01:28:56,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:28:56,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296701670] [2023-09-01 01:28:56,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:28:56,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:28:56,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:28:56,636 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:28:56,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 01:28:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:28:56,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 01:28:56,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:28:56,780 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:28:56,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 01:28:56,826 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:28:56,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:28:56,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:28:56,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 01:28:56,917 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:28:56,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:28:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:28:56,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:28:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:28:59,277 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:28:59,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296701670] [2023-09-01 01:28:59,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296701670] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:28:59,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:28:59,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 01:28:59,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512454023] [2023-09-01 01:28:59,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:28:59,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:28:59,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:28:59,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:28:59,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:29:03,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 563 [2023-09-01 01:29:03,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 485 flow. Second operand has 10 states, 10 states have (on average 205.6) internal successors, (2056), 10 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:03,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:29:03,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 563 [2023-09-01 01:29:03,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:29:14,942 INFO L130 PetriNetUnfolder]: 13770/23630 cut-off events. [2023-09-01 01:29:14,943 INFO L131 PetriNetUnfolder]: For 4058/4058 co-relation queries the response was YES. [2023-09-01 01:29:14,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56336 conditions, 23630 events. 13770/23630 cut-off events. For 4058/4058 co-relation queries the response was YES. Maximal size of possible extension queue 1027. Compared 191338 event pairs, 3426 based on Foata normal form. 0/12634 useless extension candidates. Maximal degree in co-relation 56305. Up to 3738 conditions per place. [2023-09-01 01:29:15,046 INFO L137 encePairwiseOnDemand]: 549/563 looper letters, 546 selfloop transitions, 87 changer transitions 0/633 dead transitions. [2023-09-01 01:29:15,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 633 transitions, 3501 flow [2023-09-01 01:29:15,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 01:29:15,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 01:29:15,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 7346 transitions. [2023-09-01 01:29:15,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953926476128963 [2023-09-01 01:29:15,060 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 7346 transitions. [2023-09-01 01:29:15,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 7346 transitions. [2023-09-01 01:29:15,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:29:15,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 7346 transitions. [2023-09-01 01:29:15,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 222.6060606060606) internal successors, (7346), 33 states have internal predecessors, (7346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:15,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 563.0) internal successors, (19142), 34 states have internal predecessors, (19142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:15,092 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 563.0) internal successors, (19142), 34 states have internal predecessors, (19142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:15,092 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 485 flow. Second operand 33 states and 7346 transitions. [2023-09-01 01:29:15,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 633 transitions, 3501 flow [2023-09-01 01:29:15,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 633 transitions, 3454 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-09-01 01:29:15,134 INFO L231 Difference]: Finished difference. Result has 111 places, 152 transitions, 1177 flow [2023-09-01 01:29:15,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1177, PETRI_PLACES=111, PETRI_TRANSITIONS=152} [2023-09-01 01:29:15,134 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 57 predicate places. [2023-09-01 01:29:15,135 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 152 transitions, 1177 flow [2023-09-01 01:29:15,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 205.6) internal successors, (2056), 10 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:15,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:29:15,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:29:15,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 01:29:15,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:29:15,343 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:29:15,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:29:15,343 INFO L85 PathProgramCache]: Analyzing trace with hash 842118659, now seen corresponding path program 1 times [2023-09-01 01:29:15,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:29:15,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1898752100] [2023-09-01 01:29:15,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:29:15,343 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:29:15,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:29:15,344 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:29:15,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 01:29:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:29:15,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:29:15,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:29:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:29:15,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:29:15,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:29:15,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1898752100] [2023-09-01 01:29:15,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1898752100] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:29:15,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:29:15,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:29:15,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368974168] [2023-09-01 01:29:15,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:29:15,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:29:15,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:29:15,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:29:15,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:29:15,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 563 [2023-09-01 01:29:15,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 152 transitions, 1177 flow. Second operand has 5 states, 5 states have (on average 225.6) internal successors, (1128), 5 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:15,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:29:15,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 563 [2023-09-01 01:29:15,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:29:18,107 INFO L130 PetriNetUnfolder]: 13330/22870 cut-off events. [2023-09-01 01:29:18,107 INFO L131 PetriNetUnfolder]: For 17012/17012 co-relation queries the response was YES. [2023-09-01 01:29:18,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60711 conditions, 22870 events. 13330/22870 cut-off events. For 17012/17012 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 182511 event pairs, 10986 based on Foata normal form. 0/14002 useless extension candidates. Maximal degree in co-relation 60674. Up to 22286 conditions per place. [2023-09-01 01:29:18,214 INFO L137 encePairwiseOnDemand]: 554/563 looper letters, 182 selfloop transitions, 4 changer transitions 0/186 dead transitions. [2023-09-01 01:29:18,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 186 transitions, 1754 flow [2023-09-01 01:29:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:29:18,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:29:18,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1183 transitions. [2023-09-01 01:29:18,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4202486678507993 [2023-09-01 01:29:18,217 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1183 transitions. [2023-09-01 01:29:18,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1183 transitions. [2023-09-01 01:29:18,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:29:18,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1183 transitions. [2023-09-01 01:29:18,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 236.6) internal successors, (1183), 5 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:18,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:18,221 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:18,221 INFO L175 Difference]: Start difference. First operand has 111 places, 152 transitions, 1177 flow. Second operand 5 states and 1183 transitions. [2023-09-01 01:29:18,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 186 transitions, 1754 flow [2023-09-01 01:29:18,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 186 transitions, 1651 flow, removed 29 selfloop flow, removed 3 redundant places. [2023-09-01 01:29:18,309 INFO L231 Difference]: Finished difference. Result has 114 places, 153 transitions, 1114 flow [2023-09-01 01:29:18,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1114, PETRI_PLACES=114, PETRI_TRANSITIONS=153} [2023-09-01 01:29:18,310 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 60 predicate places. [2023-09-01 01:29:18,310 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 153 transitions, 1114 flow [2023-09-01 01:29:18,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.6) internal successors, (1128), 5 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:18,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:29:18,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:29:18,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-09-01 01:29:18,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:29:18,517 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:29:18,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:29:18,518 INFO L85 PathProgramCache]: Analyzing trace with hash 144461703, now seen corresponding path program 1 times [2023-09-01 01:29:18,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:29:18,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313518524] [2023-09-01 01:29:18,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:29:18,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:29:18,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:29:18,519 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:29:18,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 01:29:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:29:18,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:29:18,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:29:18,636 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:29:18,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:29:18,665 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:29:18,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 01:29:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:29:18,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:29:18,674 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:29:18,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313518524] [2023-09-01 01:29:18,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313518524] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:29:18,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:29:18,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:29:18,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919678236] [2023-09-01 01:29:18,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:29:18,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:29:18,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:29:18,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:29:18,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:29:18,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 563 [2023-09-01 01:29:18,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 153 transitions, 1114 flow. Second operand has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:18,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:29:18,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 563 [2023-09-01 01:29:18,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:29:20,757 INFO L130 PetriNetUnfolder]: 10000/17266 cut-off events. [2023-09-01 01:29:20,757 INFO L131 PetriNetUnfolder]: For 14780/14780 co-relation queries the response was YES. [2023-09-01 01:29:20,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50936 conditions, 17266 events. 10000/17266 cut-off events. For 14780/14780 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 131836 event pairs, 8124 based on Foata normal form. 630/12694 useless extension candidates. Maximal degree in co-relation 50897. Up to 17253 conditions per place. [2023-09-01 01:29:20,830 INFO L137 encePairwiseOnDemand]: 558/563 looper letters, 138 selfloop transitions, 12 changer transitions 0/150 dead transitions. [2023-09-01 01:29:20,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 150 transitions, 1402 flow [2023-09-01 01:29:20,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:29:20,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:29:20,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 904 transitions. [2023-09-01 01:29:20,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40142095914742454 [2023-09-01 01:29:20,832 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 904 transitions. [2023-09-01 01:29:20,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 904 transitions. [2023-09-01 01:29:20,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:29:20,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 904 transitions. [2023-09-01 01:29:20,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:20,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:20,836 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:20,836 INFO L175 Difference]: Start difference. First operand has 114 places, 153 transitions, 1114 flow. Second operand 4 states and 904 transitions. [2023-09-01 01:29:20,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 150 transitions, 1402 flow [2023-09-01 01:29:21,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 150 transitions, 1325 flow, removed 36 selfloop flow, removed 2 redundant places. [2023-09-01 01:29:21,104 INFO L231 Difference]: Finished difference. Result has 112 places, 150 transitions, 1049 flow [2023-09-01 01:29:21,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1049, PETRI_PLACES=112, PETRI_TRANSITIONS=150} [2023-09-01 01:29:21,105 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2023-09-01 01:29:21,105 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 150 transitions, 1049 flow [2023-09-01 01:29:21,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:21,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:29:21,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:29:21,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 01:29:21,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:29:21,306 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:29:21,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:29:21,306 INFO L85 PathProgramCache]: Analyzing trace with hash 144461753, now seen corresponding path program 1 times [2023-09-01 01:29:21,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:29:21,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141711120] [2023-09-01 01:29:21,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:29:21,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:29:21,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:29:21,307 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:29:21,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 01:29:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:29:21,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:29:21,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:29:21,383 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 [2023-09-01 01:29:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:29:21,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:29:21,394 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:29:21,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141711120] [2023-09-01 01:29:21,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141711120] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:29:21,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:29:21,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:29:21,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170461928] [2023-09-01 01:29:21,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:29:21,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:29:21,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:29:21,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:29:21,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:29:21,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 563 [2023-09-01 01:29:21,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 150 transitions, 1049 flow. Second operand has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:21,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:29:21,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 563 [2023-09-01 01:29:21,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:29:23,203 INFO L130 PetriNetUnfolder]: 7201/12625 cut-off events. [2023-09-01 01:29:23,203 INFO L131 PetriNetUnfolder]: For 11903/11903 co-relation queries the response was YES. [2023-09-01 01:29:23,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36094 conditions, 12625 events. 7201/12625 cut-off events. For 11903/11903 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 93104 event pairs, 5703 based on Foata normal form. 0/9985 useless extension candidates. Maximal degree in co-relation 36055. Up to 12553 conditions per place. [2023-09-01 01:29:23,252 INFO L137 encePairwiseOnDemand]: 558/563 looper letters, 121 selfloop transitions, 12 changer transitions 0/133 dead transitions. [2023-09-01 01:29:23,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 133 transitions, 1210 flow [2023-09-01 01:29:23,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:29:23,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:29:23,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 901 transitions. [2023-09-01 01:29:23,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40008880994671403 [2023-09-01 01:29:23,254 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 901 transitions. [2023-09-01 01:29:23,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 901 transitions. [2023-09-01 01:29:23,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:29:23,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 901 transitions. [2023-09-01 01:29:23,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.25) internal successors, (901), 4 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:23,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:23,258 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:23,258 INFO L175 Difference]: Start difference. First operand has 112 places, 150 transitions, 1049 flow. Second operand 4 states and 901 transitions. [2023-09-01 01:29:23,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 133 transitions, 1210 flow [2023-09-01 01:29:23,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 133 transitions, 1197 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:29:23,349 INFO L231 Difference]: Finished difference. Result has 110 places, 133 transitions, 955 flow [2023-09-01 01:29:23,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=955, PETRI_PLACES=110, PETRI_TRANSITIONS=133} [2023-09-01 01:29:23,350 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 56 predicate places. [2023-09-01 01:29:23,350 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 133 transitions, 955 flow [2023-09-01 01:29:23,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:23,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:29:23,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:29:23,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 01:29:23,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:29:23,557 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:29:23,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:29:23,557 INFO L85 PathProgramCache]: Analyzing trace with hash 144461752, now seen corresponding path program 1 times [2023-09-01 01:29:23,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:29:23,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902437792] [2023-09-01 01:29:23,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:29:23,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:29:23,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:29:23,558 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:29:23,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 01:29:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:29:23,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:29:23,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:29:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:29:23,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:29:23,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-09-01 01:29:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:29:23,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:29:23,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902437792] [2023-09-01 01:29:23,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902437792] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:29:23,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:29:23,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 01:29:23,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328502678] [2023-09-01 01:29:23,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:29:23,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:29:23,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:29:23,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:29:23,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:29:26,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 563 [2023-09-01 01:29:26,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 133 transitions, 955 flow. Second operand has 10 states, 10 states have (on average 216.4) internal successors, (2164), 10 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:26,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:29:26,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 563 [2023-09-01 01:29:26,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:29:28,667 INFO L130 PetriNetUnfolder]: 8281/14677 cut-off events. [2023-09-01 01:29:28,667 INFO L131 PetriNetUnfolder]: For 17678/17678 co-relation queries the response was YES. [2023-09-01 01:29:28,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42240 conditions, 14677 events. 8281/14677 cut-off events. For 17678/17678 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 111465 event pairs, 2517 based on Foata normal form. 0/12361 useless extension candidates. Maximal degree in co-relation 42201. Up to 5208 conditions per place. [2023-09-01 01:29:28,735 INFO L137 encePairwiseOnDemand]: 553/563 looper letters, 179 selfloop transitions, 52 changer transitions 0/231 dead transitions. [2023-09-01 01:29:28,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 231 transitions, 1780 flow [2023-09-01 01:29:28,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 01:29:28,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 01:29:28,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2507 transitions. [2023-09-01 01:29:28,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4048118843855966 [2023-09-01 01:29:28,739 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2507 transitions. [2023-09-01 01:29:28,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2507 transitions. [2023-09-01 01:29:28,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:29:28,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2507 transitions. [2023-09-01 01:29:28,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 227.9090909090909) internal successors, (2507), 11 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:28,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:28,747 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:28,747 INFO L175 Difference]: Start difference. First operand has 110 places, 133 transitions, 955 flow. Second operand 11 states and 2507 transitions. [2023-09-01 01:29:28,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 231 transitions, 1780 flow [2023-09-01 01:29:28,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 231 transitions, 1766 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:29:28,855 INFO L231 Difference]: Finished difference. Result has 121 places, 136 transitions, 1143 flow [2023-09-01 01:29:28,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1143, PETRI_PLACES=121, PETRI_TRANSITIONS=136} [2023-09-01 01:29:28,855 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 67 predicate places. [2023-09-01 01:29:28,856 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 136 transitions, 1143 flow [2023-09-01 01:29:28,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 216.4) internal successors, (2164), 10 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:28,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:29:28,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:29:28,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-09-01 01:29:29,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:29:29,063 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:29:29,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:29:29,063 INFO L85 PathProgramCache]: Analyzing trace with hash 229464159, now seen corresponding path program 1 times [2023-09-01 01:29:29,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:29:29,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624244131] [2023-09-01 01:29:29,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:29:29,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:29:29,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:29:29,064 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:29:29,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 01:29:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:29:29,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:29:29,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:29:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:29:29,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:29:29,196 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:29:29,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624244131] [2023-09-01 01:29:29,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624244131] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:29:29,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:29:29,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:29:29,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837329696] [2023-09-01 01:29:29,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:29:29,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:29:29,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:29:29,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:29:29,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:29:29,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 563 [2023-09-01 01:29:29,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 136 transitions, 1143 flow. Second operand has 5 states, 5 states have (on average 225.8) internal successors, (1129), 5 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:29,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:29:29,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 563 [2023-09-01 01:29:29,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:29:31,023 INFO L130 PetriNetUnfolder]: 8203/14551 cut-off events. [2023-09-01 01:29:31,023 INFO L131 PetriNetUnfolder]: For 19486/19486 co-relation queries the response was YES. [2023-09-01 01:29:31,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45000 conditions, 14551 events. 8203/14551 cut-off events. For 19486/19486 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 110375 event pairs, 6603 based on Foata normal form. 24/12415 useless extension candidates. Maximal degree in co-relation 44957. Up to 14313 conditions per place. [2023-09-01 01:29:31,097 INFO L137 encePairwiseOnDemand]: 556/563 looper letters, 139 selfloop transitions, 17 changer transitions 0/156 dead transitions. [2023-09-01 01:29:31,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 156 transitions, 1534 flow [2023-09-01 01:29:31,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:29:31,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:29:31,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1171 transitions. [2023-09-01 01:29:31,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41598579040852574 [2023-09-01 01:29:31,099 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1171 transitions. [2023-09-01 01:29:31,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1171 transitions. [2023-09-01 01:29:31,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:29:31,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1171 transitions. [2023-09-01 01:29:31,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 234.2) internal successors, (1171), 5 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:31,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:31,103 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:31,103 INFO L175 Difference]: Start difference. First operand has 121 places, 136 transitions, 1143 flow. Second operand 5 states and 1171 transitions. [2023-09-01 01:29:31,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 156 transitions, 1534 flow [2023-09-01 01:29:31,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 156 transitions, 1476 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-09-01 01:29:31,227 INFO L231 Difference]: Finished difference. Result has 123 places, 138 transitions, 1148 flow [2023-09-01 01:29:31,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1148, PETRI_PLACES=123, PETRI_TRANSITIONS=138} [2023-09-01 01:29:31,227 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 69 predicate places. [2023-09-01 01:29:31,227 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 138 transitions, 1148 flow [2023-09-01 01:29:31,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.8) internal successors, (1129), 5 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:31,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:29:31,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:29:31,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-09-01 01:29:31,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:29:31,432 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:29:31,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:29:31,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1391682927, now seen corresponding path program 1 times [2023-09-01 01:29:31,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:29:31,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782563078] [2023-09-01 01:29:31,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:29:31,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:29:31,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:29:31,434 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:29:31,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 01:29:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:29:31,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 01:29:31,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:29:31,589 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:29:31,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 01:29:31,624 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:29:31,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:29:31,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:29:31,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 01:29:31,711 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:29:31,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:29:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:29:31,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:29:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:29:36,086 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:29:36,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782563078] [2023-09-01 01:29:36,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782563078] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:29:36,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:29:36,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 01:29:36,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096548712] [2023-09-01 01:29:36,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:29:36,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:29:36,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:29:36,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:29:36,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:29:39,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 563 [2023-09-01 01:29:39,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 138 transitions, 1148 flow. Second operand has 10 states, 10 states have (on average 207.0) internal successors, (2070), 10 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:39,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:29:39,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 563 [2023-09-01 01:29:39,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:29:43,161 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 [0, 1] [2023-09-01 01:29:53,011 INFO L130 PetriNetUnfolder]: 10759/18745 cut-off events. [2023-09-01 01:29:53,011 INFO L131 PetriNetUnfolder]: For 35188/35188 co-relation queries the response was YES. [2023-09-01 01:29:53,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62134 conditions, 18745 events. 10759/18745 cut-off events. For 35188/35188 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 147246 event pairs, 5325 based on Foata normal form. 0/15883 useless extension candidates. Maximal degree in co-relation 62092. Up to 4141 conditions per place. [2023-09-01 01:29:53,115 INFO L137 encePairwiseOnDemand]: 552/563 looper letters, 498 selfloop transitions, 63 changer transitions 0/561 dead transitions. [2023-09-01 01:29:53,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 561 transitions, 4352 flow [2023-09-01 01:29:53,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 01:29:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 01:29:53,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 7234 transitions. [2023-09-01 01:29:53,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38936433607836807 [2023-09-01 01:29:53,121 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 7234 transitions. [2023-09-01 01:29:53,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 7234 transitions. [2023-09-01 01:29:53,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:29:53,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 7234 transitions. [2023-09-01 01:29:53,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 219.21212121212122) internal successors, (7234), 33 states have internal predecessors, (7234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:53,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 563.0) internal successors, (19142), 34 states have internal predecessors, (19142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:53,137 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 563.0) internal successors, (19142), 34 states have internal predecessors, (19142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:53,137 INFO L175 Difference]: Start difference. First operand has 123 places, 138 transitions, 1148 flow. Second operand 33 states and 7234 transitions. [2023-09-01 01:29:53,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 561 transitions, 4352 flow [2023-09-01 01:29:53,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 561 transitions, 4321 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:29:53,299 INFO L231 Difference]: Finished difference. Result has 159 places, 168 transitions, 1488 flow [2023-09-01 01:29:53,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1488, PETRI_PLACES=159, PETRI_TRANSITIONS=168} [2023-09-01 01:29:53,300 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 105 predicate places. [2023-09-01 01:29:53,300 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 168 transitions, 1488 flow [2023-09-01 01:29:53,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 207.0) internal successors, (2070), 10 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:53,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:29:53,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:29:53,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 01:29:53,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:29:53,500 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:29:53,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:29:53,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1391683065, now seen corresponding path program 1 times [2023-09-01 01:29:53,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:29:53,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781147729] [2023-09-01 01:29:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:29:53,501 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:29:53,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:29:53,502 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:29:53,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 01:29:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:29:53,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:29:53,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:29:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:29:53,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:29:53,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-09-01 01:29:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:29:53,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:29:53,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781147729] [2023-09-01 01:29:53,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781147729] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:29:53,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:29:53,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 01:29:53,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920280347] [2023-09-01 01:29:53,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:29:53,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:29:53,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:29:53,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:29:53,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:29:55,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 563 [2023-09-01 01:29:55,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 168 transitions, 1488 flow. Second operand has 10 states, 10 states have (on average 216.8) internal successors, (2168), 10 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:55,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:29:55,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 563 [2023-09-01 01:29:55,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:29:58,467 INFO L130 PetriNetUnfolder]: 11515/20347 cut-off events. [2023-09-01 01:29:58,468 INFO L131 PetriNetUnfolder]: For 79863/79863 co-relation queries the response was YES. [2023-09-01 01:29:58,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86409 conditions, 20347 events. 11515/20347 cut-off events. For 79863/79863 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 164578 event pairs, 6513 based on Foata normal form. 360/19087 useless extension candidates. Maximal degree in co-relation 86360. Up to 12380 conditions per place. [2023-09-01 01:29:58,594 INFO L137 encePairwiseOnDemand]: 555/563 looper letters, 221 selfloop transitions, 49 changer transitions 0/270 dead transitions. [2023-09-01 01:29:58,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 270 transitions, 2683 flow [2023-09-01 01:29:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 01:29:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 01:29:58,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2042 transitions. [2023-09-01 01:29:58,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40299980264456287 [2023-09-01 01:29:58,597 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2042 transitions. [2023-09-01 01:29:58,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2042 transitions. [2023-09-01 01:29:58,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:29:58,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2042 transitions. [2023-09-01 01:29:58,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 226.88888888888889) internal successors, (2042), 9 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:58,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 563.0) internal successors, (5630), 10 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:58,601 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 563.0) internal successors, (5630), 10 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:58,601 INFO L175 Difference]: Start difference. First operand has 159 places, 168 transitions, 1488 flow. Second operand 9 states and 2042 transitions. [2023-09-01 01:29:58,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 270 transitions, 2683 flow [2023-09-01 01:29:59,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 270 transitions, 2593 flow, removed 26 selfloop flow, removed 6 redundant places. [2023-09-01 01:29:59,343 INFO L231 Difference]: Finished difference. Result has 163 places, 165 transitions, 1521 flow [2023-09-01 01:29:59,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1521, PETRI_PLACES=163, PETRI_TRANSITIONS=165} [2023-09-01 01:29:59,343 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 109 predicate places. [2023-09-01 01:29:59,343 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 165 transitions, 1521 flow [2023-09-01 01:29:59,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 216.8) internal successors, (2168), 10 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:59,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:29:59,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:29:59,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 01:29:59,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:29:59,544 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:29:59,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:29:59,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1388823273, now seen corresponding path program 1 times [2023-09-01 01:29:59,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:29:59,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050162482] [2023-09-01 01:29:59,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:29:59,545 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:29:59,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:29:59,545 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:29:59,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 01:29:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:29:59,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:29:59,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:29:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:29:59,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:29:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:29:59,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:29:59,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050162482] [2023-09-01 01:29:59,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050162482] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:29:59,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:29:59,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:29:59,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850799322] [2023-09-01 01:29:59,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:29:59,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:29:59,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:29:59,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:29:59,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:30:00,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 563 [2023-09-01 01:30:00,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 165 transitions, 1521 flow. Second operand has 12 states, 12 states have (on average 221.66666666666666) internal successors, (2660), 12 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:00,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:30:00,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 563 [2023-09-01 01:30:00,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:30:03,405 INFO L130 PetriNetUnfolder]: 10003/17809 cut-off events. [2023-09-01 01:30:03,406 INFO L131 PetriNetUnfolder]: For 117182/117182 co-relation queries the response was YES. [2023-09-01 01:30:03,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78305 conditions, 17809 events. 10003/17809 cut-off events. For 117182/117182 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 142487 event pairs, 6766 based on Foata normal form. 288/17953 useless extension candidates. Maximal degree in co-relation 78253. Up to 13706 conditions per place. [2023-09-01 01:30:03,516 INFO L137 encePairwiseOnDemand]: 552/563 looper letters, 225 selfloop transitions, 27 changer transitions 0/252 dead transitions. [2023-09-01 01:30:03,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 252 transitions, 2629 flow [2023-09-01 01:30:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 01:30:03,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 01:30:03,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2520 transitions. [2023-09-01 01:30:03,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069110285806556 [2023-09-01 01:30:03,519 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2520 transitions. [2023-09-01 01:30:03,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2520 transitions. [2023-09-01 01:30:03,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:30:03,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2520 transitions. [2023-09-01 01:30:03,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 229.0909090909091) internal successors, (2520), 11 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:03,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:03,524 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:03,524 INFO L175 Difference]: Start difference. First operand has 163 places, 165 transitions, 1521 flow. Second operand 11 states and 2520 transitions. [2023-09-01 01:30:03,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 252 transitions, 2629 flow [2023-09-01 01:30:03,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 252 transitions, 2546 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-09-01 01:30:03,960 INFO L231 Difference]: Finished difference. Result has 167 places, 163 transitions, 1568 flow [2023-09-01 01:30:03,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1568, PETRI_PLACES=167, PETRI_TRANSITIONS=163} [2023-09-01 01:30:03,961 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 113 predicate places. [2023-09-01 01:30:03,961 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 163 transitions, 1568 flow [2023-09-01 01:30:03,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 221.66666666666666) internal successors, (2660), 12 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:03,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:30:03,962 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:30:03,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-09-01 01:30:04,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:30:04,165 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:30:04,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:30:04,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1038367364, now seen corresponding path program 2 times [2023-09-01 01:30:04,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:30:04,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94856204] [2023-09-01 01:30:04,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:30:04,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:30:04,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:30:04,167 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:30:04,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 01:30:04,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:30:04,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:30:04,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:30:04,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:30:04,302 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:30:04,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:30:04,336 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:30:04,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:30:04,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:30:04,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:30:04,387 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:30:04,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:30:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:30:04,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:30:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:30:05,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:30:05,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94856204] [2023-09-01 01:30:05,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94856204] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:30:05,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:30:05,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-09-01 01:30:05,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501314905] [2023-09-01 01:30:05,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:30:05,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:30:05,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:30:05,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:30:05,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:30:09,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:30:13,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:30:15,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:30:20,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 563 [2023-09-01 01:30:20,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 163 transitions, 1568 flow. Second operand has 14 states, 14 states have (on average 207.57142857142858) internal successors, (2906), 14 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:20,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:30:20,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 563 [2023-09-01 01:30:20,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:30:25,963 INFO L130 PetriNetUnfolder]: 13585/24361 cut-off events. [2023-09-01 01:30:25,964 INFO L131 PetriNetUnfolder]: For 198384/198384 co-relation queries the response was YES. [2023-09-01 01:30:26,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105411 conditions, 24361 events. 13585/24361 cut-off events. For 198384/198384 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 204438 event pairs, 2860 based on Foata normal form. 468/24541 useless extension candidates. Maximal degree in co-relation 105358. Up to 5736 conditions per place. [2023-09-01 01:30:26,105 INFO L137 encePairwiseOnDemand]: 554/563 looper letters, 356 selfloop transitions, 65 changer transitions 0/421 dead transitions. [2023-09-01 01:30:26,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 421 transitions, 4084 flow [2023-09-01 01:30:26,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 01:30:26,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 01:30:26,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3763 transitions. [2023-09-01 01:30:26,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3931668582175321 [2023-09-01 01:30:26,109 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3763 transitions. [2023-09-01 01:30:26,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3763 transitions. [2023-09-01 01:30:26,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:30:26,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3763 transitions. [2023-09-01 01:30:26,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 221.35294117647058) internal successors, (3763), 17 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:26,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 563.0) internal successors, (10134), 18 states have internal predecessors, (10134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:26,117 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 563.0) internal successors, (10134), 18 states have internal predecessors, (10134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:26,117 INFO L175 Difference]: Start difference. First operand has 167 places, 163 transitions, 1568 flow. Second operand 17 states and 3763 transitions. [2023-09-01 01:30:26,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 421 transitions, 4084 flow [2023-09-01 01:30:26,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 421 transitions, 4068 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-09-01 01:30:26,658 INFO L231 Difference]: Finished difference. Result has 186 places, 183 transitions, 1937 flow [2023-09-01 01:30:26,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1937, PETRI_PLACES=186, PETRI_TRANSITIONS=183} [2023-09-01 01:30:26,659 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 132 predicate places. [2023-09-01 01:30:26,659 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 183 transitions, 1937 flow [2023-09-01 01:30:26,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 207.57142857142858) internal successors, (2906), 14 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:26,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:30:26,660 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:30:26,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-09-01 01:30:26,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:30:26,860 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:30:26,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:30:26,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1038367412, now seen corresponding path program 1 times [2023-09-01 01:30:26,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:30:26,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503876808] [2023-09-01 01:30:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:30:26,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:30:26,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:30:26,862 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:30:26,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-09-01 01:30:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:30:26,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:30:26,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:30:26,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 01:30:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:30:27,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:30:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:30:27,405 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:30:27,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503876808] [2023-09-01 01:30:27,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503876808] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:30:27,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:30:27,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-09-01 01:30:27,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518083554] [2023-09-01 01:30:27,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:30:27,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:30:27,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:30:27,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:30:27,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:30:30,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 563 [2023-09-01 01:30:30,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 183 transitions, 1937 flow. Second operand has 12 states, 12 states have (on average 217.5) internal successors, (2610), 12 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:30,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:30:30,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 563 [2023-09-01 01:30:30,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:30:36,799 INFO L130 PetriNetUnfolder]: 20056/35764 cut-off events. [2023-09-01 01:30:36,799 INFO L131 PetriNetUnfolder]: For 333462/333462 co-relation queries the response was YES. [2023-09-01 01:30:37,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167483 conditions, 35764 events. 20056/35764 cut-off events. For 333462/333462 co-relation queries the response was YES. Maximal size of possible extension queue 1236. Compared 310132 event pairs, 2456 based on Foata normal form. 486/36106 useless extension candidates. Maximal degree in co-relation 167423. Up to 6931 conditions per place. [2023-09-01 01:30:37,123 INFO L137 encePairwiseOnDemand]: 555/563 looper letters, 309 selfloop transitions, 91 changer transitions 0/400 dead transitions. [2023-09-01 01:30:37,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 400 transitions, 4549 flow [2023-09-01 01:30:37,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 01:30:37,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 01:30:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2062 transitions. [2023-09-01 01:30:37,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40694691138740874 [2023-09-01 01:30:37,126 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2062 transitions. [2023-09-01 01:30:37,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2062 transitions. [2023-09-01 01:30:37,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:30:37,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2062 transitions. [2023-09-01 01:30:37,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 229.11111111111111) internal successors, (2062), 9 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:37,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 563.0) internal successors, (5630), 10 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:37,131 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 563.0) internal successors, (5630), 10 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:37,131 INFO L175 Difference]: Start difference. First operand has 186 places, 183 transitions, 1937 flow. Second operand 9 states and 2062 transitions. [2023-09-01 01:30:37,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 400 transitions, 4549 flow [2023-09-01 01:30:38,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 400 transitions, 4442 flow, removed 31 selfloop flow, removed 6 redundant places. [2023-09-01 01:30:38,304 INFO L231 Difference]: Finished difference. Result has 192 places, 209 transitions, 2415 flow [2023-09-01 01:30:38,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1785, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2415, PETRI_PLACES=192, PETRI_TRANSITIONS=209} [2023-09-01 01:30:38,304 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 138 predicate places. [2023-09-01 01:30:38,304 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 209 transitions, 2415 flow [2023-09-01 01:30:38,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 217.5) internal successors, (2610), 12 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:38,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:30:38,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:30:38,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-09-01 01:30:38,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:30:38,505 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:30:38,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:30:38,506 INFO L85 PathProgramCache]: Analyzing trace with hash 192505985, now seen corresponding path program 1 times [2023-09-01 01:30:38,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:30:38,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71299166] [2023-09-01 01:30:38,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:30:38,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:30:38,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:30:38,507 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:30:38,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-09-01 01:30:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:30:38,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:30:38,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:30:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:30:38,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:30:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:30:38,765 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:30:38,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71299166] [2023-09-01 01:30:38,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71299166] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:30:38,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:30:38,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:30:38,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384059071] [2023-09-01 01:30:38,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:30:38,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:30:38,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:30:38,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:30:38,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:30:39,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 563 [2023-09-01 01:30:39,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 209 transitions, 2415 flow. Second operand has 12 states, 12 states have (on average 221.83333333333334) internal successors, (2662), 12 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:39,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:30:39,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 563 [2023-09-01 01:30:39,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:30:45,459 INFO L130 PetriNetUnfolder]: 19084/34252 cut-off events. [2023-09-01 01:30:45,460 INFO L131 PetriNetUnfolder]: For 335058/335058 co-relation queries the response was YES. [2023-09-01 01:30:45,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165877 conditions, 34252 events. 19084/34252 cut-off events. For 335058/335058 co-relation queries the response was YES. Maximal size of possible extension queue 1202. Compared 300638 event pairs, 15306 based on Foata normal form. 810/35062 useless extension candidates. Maximal degree in co-relation 165816. Up to 30644 conditions per place. [2023-09-01 01:30:45,774 INFO L137 encePairwiseOnDemand]: 553/563 looper letters, 261 selfloop transitions, 30 changer transitions 0/291 dead transitions. [2023-09-01 01:30:45,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 291 transitions, 3503 flow [2023-09-01 01:30:45,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 01:30:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 01:30:45,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2520 transitions. [2023-09-01 01:30:45,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069110285806556 [2023-09-01 01:30:45,777 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2520 transitions. [2023-09-01 01:30:45,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2520 transitions. [2023-09-01 01:30:45,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:30:45,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2520 transitions. [2023-09-01 01:30:45,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 229.0909090909091) internal successors, (2520), 11 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:45,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:45,782 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:45,782 INFO L175 Difference]: Start difference. First operand has 192 places, 209 transitions, 2415 flow. Second operand 11 states and 2520 transitions. [2023-09-01 01:30:45,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 291 transitions, 3503 flow [2023-09-01 01:30:47,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 291 transitions, 3433 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 01:30:47,357 INFO L231 Difference]: Finished difference. Result has 197 places, 206 transitions, 2402 flow [2023-09-01 01:30:47,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=2330, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2402, PETRI_PLACES=197, PETRI_TRANSITIONS=206} [2023-09-01 01:30:47,357 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 143 predicate places. [2023-09-01 01:30:47,357 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 206 transitions, 2402 flow [2023-09-01 01:30:47,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 221.83333333333334) internal successors, (2662), 12 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:47,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:30:47,358 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 01:30:47,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-09-01 01:30:47,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:30:47,559 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:30:47,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:30:47,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1658630862, now seen corresponding path program 3 times [2023-09-01 01:30:47,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:30:47,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911704578] [2023-09-01 01:30:47,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:30:47,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:30:47,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:30:47,562 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:30:47,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-09-01 01:30:47,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 01:30:47,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:30:47,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 01:30:47,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:30:47,744 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:30:47,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 01:30:47,981 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:30:47,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:30:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:30:49,612 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:30:49,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911704578] [2023-09-01 01:30:49,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911704578] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:30:49,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:30:49,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 01:30:49,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457448039] [2023-09-01 01:30:49,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:30:49,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 01:30:49,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:30:49,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 01:30:49,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 01:31:08,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 563 [2023-09-01 01:31:08,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 206 transitions, 2402 flow. Second operand has 24 states, 24 states have (on average 220.0) internal successors, (5280), 24 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:08,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:08,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 563 [2023-09-01 01:31:08,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:16,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:31:18,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:31:20,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:31:22,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:31:24,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:31:25,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:31:27,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:31:29,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:31:30,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:31:32,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:31:36,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:31:38,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:31:40,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:31:42,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:31:45,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:31:46,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:31:49,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:31:52,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:31:57,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:32:12,952 INFO L130 PetriNetUnfolder]: 38068/68276 cut-off events. [2023-09-01 01:32:12,952 INFO L131 PetriNetUnfolder]: For 706767/706767 co-relation queries the response was YES. [2023-09-01 01:32:13,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338598 conditions, 68276 events. 38068/68276 cut-off events. For 706767/706767 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 630690 event pairs, 33144 based on Foata normal form. 32/68308 useless extension candidates. Maximal degree in co-relation 338535. Up to 12241 conditions per place. [2023-09-01 01:32:13,800 INFO L137 encePairwiseOnDemand]: 556/563 looper letters, 1122 selfloop transitions, 94 changer transitions 0/1216 dead transitions. [2023-09-01 01:32:13,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 1216 transitions, 15917 flow [2023-09-01 01:32:13,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 01:32:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 01:32:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 7745 transitions. [2023-09-01 01:32:13,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4168685074546531 [2023-09-01 01:32:13,807 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 7745 transitions. [2023-09-01 01:32:13,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 7745 transitions. [2023-09-01 01:32:13,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:13,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 7745 transitions. [2023-09-01 01:32:13,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 234.6969696969697) internal successors, (7745), 33 states have internal predecessors, (7745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:13,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 563.0) internal successors, (19142), 34 states have internal predecessors, (19142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:13,822 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 563.0) internal successors, (19142), 34 states have internal predecessors, (19142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:13,822 INFO L175 Difference]: Start difference. First operand has 197 places, 206 transitions, 2402 flow. Second operand 33 states and 7745 transitions. [2023-09-01 01:32:13,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 1216 transitions, 15917 flow [2023-09-01 01:32:19,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 1216 transitions, 15786 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-09-01 01:32:19,542 INFO L231 Difference]: Finished difference. Result has 243 places, 259 transitions, 3466 flow [2023-09-01 01:32:19,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=2368, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3466, PETRI_PLACES=243, PETRI_TRANSITIONS=259} [2023-09-01 01:32:19,543 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 189 predicate places. [2023-09-01 01:32:19,543 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 259 transitions, 3466 flow [2023-09-01 01:32:19,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 220.0) internal successors, (5280), 24 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:19,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:19,544 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:19,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-09-01 01:32:19,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:19,751 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:32:19,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:19,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2081692464, now seen corresponding path program 1 times [2023-09-01 01:32:19,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:19,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [756627678] [2023-09-01 01:32:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:19,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:19,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:19,753 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:19,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-09-01 01:32:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:19,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:32:19,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:19,867 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 [2023-09-01 01:32:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:32:19,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:32:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:32:20,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:20,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [756627678] [2023-09-01 01:32:20,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [756627678] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:32:20,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:32:20,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 01:32:20,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275388377] [2023-09-01 01:32:20,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:32:20,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:32:20,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:20,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:32:20,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:32:22,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 563 [2023-09-01 01:32:22,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 259 transitions, 3466 flow. Second operand has 10 states, 10 states have (on average 221.0) internal successors, (2210), 10 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:22,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:22,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 563 [2023-09-01 01:32:22,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:49,796 INFO L130 PetriNetUnfolder]: 77758/137882 cut-off events. [2023-09-01 01:32:49,796 INFO L131 PetriNetUnfolder]: For 1185615/1185615 co-relation queries the response was YES. [2023-09-01 01:32:51,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748364 conditions, 137882 events. 77758/137882 cut-off events. For 1185615/1185615 co-relation queries the response was YES. Maximal size of possible extension queue 3328. Compared 1391070 event pairs, 21732 based on Foata normal form. 9288/147170 useless extension candidates. Maximal degree in co-relation 748282. Up to 44404 conditions per place. [2023-09-01 01:32:52,287 INFO L137 encePairwiseOnDemand]: 558/563 looper letters, 504 selfloop transitions, 98 changer transitions 0/602 dead transitions. [2023-09-01 01:32:52,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 602 transitions, 8376 flow [2023-09-01 01:32:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:32:52,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:32:52,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1852 transitions. [2023-09-01 01:32:52,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.411190053285968 [2023-09-01 01:32:52,291 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1852 transitions. [2023-09-01 01:32:52,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1852 transitions. [2023-09-01 01:32:52,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:52,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1852 transitions. [2023-09-01 01:32:52,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 231.5) internal successors, (1852), 8 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:52,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 563.0) internal successors, (5067), 9 states have internal predecessors, (5067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:52,295 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 563.0) internal successors, (5067), 9 states have internal predecessors, (5067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:52,295 INFO L175 Difference]: Start difference. First operand has 243 places, 259 transitions, 3466 flow. Second operand 8 states and 1852 transitions. [2023-09-01 01:32:52,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 602 transitions, 8376 flow [2023-09-01 01:33:00,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 602 transitions, 8184 flow, removed 39 selfloop flow, removed 10 redundant places. [2023-09-01 01:33:00,563 INFO L231 Difference]: Finished difference. Result has 243 places, 265 transitions, 3695 flow [2023-09-01 01:33:00,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=3274, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3695, PETRI_PLACES=243, PETRI_TRANSITIONS=265} [2023-09-01 01:33:00,564 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 189 predicate places. [2023-09-01 01:33:00,564 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 265 transitions, 3695 flow [2023-09-01 01:33:00,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 221.0) internal successors, (2210), 10 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:00,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:33:00,564 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:33:00,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-09-01 01:33:00,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:00,765 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:33:00,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:33:00,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2081692602, now seen corresponding path program 2 times [2023-09-01 01:33:00,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:33:00,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430820071] [2023-09-01 01:33:00,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:33:00,766 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:00,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:33:00,767 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:33:00,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-09-01 01:33:00,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:33:00,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:33:00,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:33:00,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:33:00,921 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:33:00,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:33:00,954 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:33:00,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:33:01,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:01,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:33:01,009 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:33:01,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:33:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:33:01,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:33:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:33:01,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:33:01,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430820071] [2023-09-01 01:33:01,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430820071] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:33:01,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:33:01,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-09-01 01:33:01,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493312146] [2023-09-01 01:33:01,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:33:01,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:33:01,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:33:01,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:33:01,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:33:06,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:33:12,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 563 [2023-09-01 01:33:12,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 265 transitions, 3695 flow. Second operand has 14 states, 14 states have (on average 209.71428571428572) internal successors, (2936), 14 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:12,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:33:12,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 563 [2023-09-01 01:33:12,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:33:39,916 INFO L130 PetriNetUnfolder]: 71260/126812 cut-off events. [2023-09-01 01:33:39,917 INFO L131 PetriNetUnfolder]: For 1757136/1757136 co-relation queries the response was YES. [2023-09-01 01:33:41,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710598 conditions, 126812 events. 71260/126812 cut-off events. For 1757136/1757136 co-relation queries the response was YES. Maximal size of possible extension queue 3017. Compared 1268336 event pairs, 43602 based on Foata normal form. 4572/131384 useless extension candidates. Maximal degree in co-relation 710513. Up to 77145 conditions per place. [2023-09-01 01:33:42,240 INFO L137 encePairwiseOnDemand]: 555/563 looper letters, 555 selfloop transitions, 61 changer transitions 0/616 dead transitions. [2023-09-01 01:33:42,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 616 transitions, 8083 flow [2023-09-01 01:33:42,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 01:33:42,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 01:33:42,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3343 transitions. [2023-09-01 01:33:42,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958555358200118 [2023-09-01 01:33:42,244 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3343 transitions. [2023-09-01 01:33:42,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3343 transitions. [2023-09-01 01:33:42,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:33:42,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3343 transitions. [2023-09-01 01:33:42,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 222.86666666666667) internal successors, (3343), 15 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:42,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 563.0) internal successors, (9008), 16 states have internal predecessors, (9008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:42,250 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 563.0) internal successors, (9008), 16 states have internal predecessors, (9008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:42,251 INFO L175 Difference]: Start difference. First operand has 243 places, 265 transitions, 3695 flow. Second operand 15 states and 3343 transitions. [2023-09-01 01:33:42,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 616 transitions, 8083 flow [2023-09-01 01:34:19,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 616 transitions, 7824 flow, removed 72 selfloop flow, removed 3 redundant places. [2023-09-01 01:34:19,123 INFO L231 Difference]: Finished difference. Result has 258 places, 267 transitions, 3673 flow [2023-09-01 01:34:19,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=3492, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3673, PETRI_PLACES=258, PETRI_TRANSITIONS=267} [2023-09-01 01:34:19,124 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 204 predicate places. [2023-09-01 01:34:19,124 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 267 transitions, 3673 flow [2023-09-01 01:34:19,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 209.71428571428572) internal successors, (2936), 14 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:19,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:34:19,125 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:34:19,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-09-01 01:34:19,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:19,331 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:34:19,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:34:19,332 INFO L85 PathProgramCache]: Analyzing trace with hash -107953014, now seen corresponding path program 3 times [2023-09-01 01:34:19,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:34:19,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497065063] [2023-09-01 01:34:19,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:34:19,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:19,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:34:19,333 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:34:19,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-09-01 01:34:19,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 01:34:19,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:34:19,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 01:34:19,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:34:19,506 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:34:19,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 01:34:19,543 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:34:19,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:34:19,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:34:19,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 01:34:19,596 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:34:19,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:34:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:34:19,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:34:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:34:20,316 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:34:20,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497065063] [2023-09-01 01:34:20,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497065063] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:34:20,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:34:20,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:34:20,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135756136] [2023-09-01 01:34:20,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:34:20,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:34:20,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:34:20,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:34:20,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:34:27,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 563 [2023-09-01 01:34:27,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 267 transitions, 3673 flow. Second operand has 12 states, 12 states have (on average 217.0) internal successors, (2604), 12 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:27,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:34:27,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 563 [2023-09-01 01:34:27,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:35:03,139 INFO L130 PetriNetUnfolder]: 87586/153794 cut-off events. [2023-09-01 01:35:03,139 INFO L131 PetriNetUnfolder]: For 1823929/1823929 co-relation queries the response was YES. [2023-09-01 01:35:05,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840284 conditions, 153794 events. 87586/153794 cut-off events. For 1823929/1823929 co-relation queries the response was YES. Maximal size of possible extension queue 3552. Compared 1535225 event pairs, 17790 based on Foata normal form. 12384/166178 useless extension candidates. Maximal degree in co-relation 840194. Up to 37021 conditions per place. [2023-09-01 01:35:06,469 INFO L137 encePairwiseOnDemand]: 557/563 looper letters, 699 selfloop transitions, 73 changer transitions 0/772 dead transitions. [2023-09-01 01:35:06,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 772 transitions, 10614 flow [2023-09-01 01:35:06,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 01:35:06,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 01:35:06,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2281 transitions. [2023-09-01 01:35:06,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051509769094139 [2023-09-01 01:35:06,474 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2281 transitions. [2023-09-01 01:35:06,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2281 transitions. [2023-09-01 01:35:06,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:35:06,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2281 transitions. [2023-09-01 01:35:06,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 228.1) internal successors, (2281), 10 states have internal predecessors, (2281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:06,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 563.0) internal successors, (6193), 11 states have internal predecessors, (6193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:06,479 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 563.0) internal successors, (6193), 11 states have internal predecessors, (6193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:06,479 INFO L175 Difference]: Start difference. First operand has 258 places, 267 transitions, 3673 flow. Second operand 10 states and 2281 transitions. [2023-09-01 01:35:06,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 772 transitions, 10614 flow [2023-09-01 01:35:44,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 772 transitions, 10362 flow, removed 72 selfloop flow, removed 9 redundant places. [2023-09-01 01:35:44,094 INFO L231 Difference]: Finished difference. Result has 263 places, 277 transitions, 3892 flow [2023-09-01 01:35:44,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=3445, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3892, PETRI_PLACES=263, PETRI_TRANSITIONS=277} [2023-09-01 01:35:44,094 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 209 predicate places. [2023-09-01 01:35:44,095 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 277 transitions, 3892 flow [2023-09-01 01:35:44,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 217.0) internal successors, (2604), 12 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:44,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:35:44,095 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:35:44,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-09-01 01:35:44,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:35:44,296 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:35:44,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:35:44,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1438703333, now seen corresponding path program 3 times [2023-09-01 01:35:44,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:35:44,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365786013] [2023-09-01 01:35:44,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:35:44,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:35:44,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:35:44,298 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:35:44,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-09-01 01:35:44,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 01:35:44,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:35:44,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 01:35:44,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:35:44,478 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:35:44,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 01:35:44,514 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:35:44,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:35:44,614 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:35:44,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:35:44,619 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 21 treesize of output 21 [2023-09-01 01:35:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:35:44,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:35:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:35:46,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:35:46,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365786013] [2023-09-01 01:35:46,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365786013] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:35:46,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:35:46,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-09-01 01:35:46,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306146346] [2023-09-01 01:35:46,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:35:46,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 01:35:46,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:35:46,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 01:35:46,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-09-01 01:36:02,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:36:07,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:36:15,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:36:19,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 563 [2023-09-01 01:36:19,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 277 transitions, 3892 flow. Second operand has 16 states, 16 states have (on average 199.5) internal successors, (3192), 16 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:19,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:36:19,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 563 [2023-09-01 01:36:19,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:36:24,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:36:48,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1]