./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-commit-1.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 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:57:57,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:57:57,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:57:57,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:57:57,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:57:57,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:57:57,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:57:57,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:57:57,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:57:57,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:57:57,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:57:57,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:57:57,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:57:57,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:57:57,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:57:57,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:57:57,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:57:57,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:57:57,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:57:57,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:57:57,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:57:57,197 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:57:57,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:57:57,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:57:57,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:57:57,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:57:57,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:57:57,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:57:57,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:57:57,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:57:57,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:57:57,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:57:57,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:57:57,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:57:57,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:57:57,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:57:57,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:57:57,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:57:57,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:57:57,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:57:57,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:57:57,231 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:57:57,252 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:57:57,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:57:57,252 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:57:57,252 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:57:57,253 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:57:57,253 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:57:57,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:57:57,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:57:57,254 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:57:57,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:57:57,255 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:57:57,255 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:57:57,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:57:57,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:57:57,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:57:57,256 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:57:57,256 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:57:57,256 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:57:57,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:57:57,256 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:57:57,256 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:57:57,257 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:57:57,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:57:57,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:57:57,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:57:57,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:57:57,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:57:57,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:57:57,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:57:57,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:57:57,258 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:57:57,259 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:57:57,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:57:57,259 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:57:57,259 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:57:57,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:57:57,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:57:57,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:57:57,573 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:57:57,574 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:57:57,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c [2023-08-29 23:57:58,737 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:57:58,940 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:57:58,941 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c [2023-08-29 23:57:58,948 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3dba72b0/c2e5d5422cc54d5f95f0c09bb5234fad/FLAG50506cec0 [2023-08-29 23:57:58,959 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3dba72b0/c2e5d5422cc54d5f95f0c09bb5234fad [2023-08-29 23:57:58,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:57:58,962 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:57:58,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:57:58,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:57:58,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:57:58,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:57:58" (1/1) ... [2023-08-29 23:57:58,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@102ee708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:58, skipping insertion in model container [2023-08-29 23:57:58,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:57:58" (1/1) ... [2023-08-29 23:57:58,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:57:59,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:57:59,205 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c[4604,4617] [2023-08-29 23:57:59,216 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:57:59,229 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 23:57:59,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1f791974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:59, skipping insertion in model container [2023-08-29 23:57:59,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:57:59,232 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 23:57:59,234 INFO L158 Benchmark]: Toolchain (without parser) took 270.53ms. Allocated memory is still 79.7MB. Free memory was 57.4MB in the beginning and 47.2MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-29 23:57:59,235 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 60.8MB. Free memory is still 38.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 23:57:59,236 INFO L158 Benchmark]: CACSL2BoogieTranslator took 268.71ms. Allocated memory is still 79.7MB. Free memory was 57.2MB in the beginning and 47.2MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-29 23:57:59,237 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 60.8MB. Free memory is still 38.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 268.71ms. Allocated memory is still 79.7MB. Free memory was 57.2MB in the beginning and 47.2MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 157]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-commit-1.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 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:58:00,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:58:00,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:58:00,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:58:00,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:58:00,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:58:00,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:58:00,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:58:01,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:58:01,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:58:01,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:58:01,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:58:01,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:58:01,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:58:01,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:58:01,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:58:01,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:58:01,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:58:01,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:58:01,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:58:01,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:58:01,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:58:01,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:58:01,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:58:01,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:58:01,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:58:01,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:58:01,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:58:01,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:58:01,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:58:01,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:58:01,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:58:01,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:58:01,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:58:01,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:58:01,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:58:01,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:58:01,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:58:01,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:58:01,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:58:01,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:58:01,048 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 23:58:01,082 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:58:01,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:58:01,083 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:58:01,083 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:58:01,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:58:01,084 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:58:01,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:58:01,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:58:01,085 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:58:01,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:58:01,086 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:58:01,086 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:58:01,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:58:01,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:58:01,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:58:01,087 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:58:01,087 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:58:01,088 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:58:01,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:58:01,088 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:58:01,088 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 23:58:01,088 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 23:58:01,088 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:58:01,089 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:58:01,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:58:01,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:58:01,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:58:01,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:58:01,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:58:01,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:58:01,090 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 23:58:01,090 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 23:58:01,091 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:58:01,091 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:58:01,091 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:58:01,091 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 23:58:01,091 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:58:01,092 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:58:01,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:58:01,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:58:01,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:58:01,425 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:58:01,426 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:58:01,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c [2023-08-29 23:58:02,647 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:58:02,881 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:58:02,881 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c [2023-08-29 23:58:02,887 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a952d64eb/1401232f52944c20b0bf566501af2a5a/FLAG188e8e1f7 [2023-08-29 23:58:02,902 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a952d64eb/1401232f52944c20b0bf566501af2a5a [2023-08-29 23:58:02,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:58:02,904 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:58:02,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:58:02,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:58:02,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:58:02,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:58:02" (1/1) ... [2023-08-29 23:58:02,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22e989c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:58:02, skipping insertion in model container [2023-08-29 23:58:02,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:58:02" (1/1) ... [2023-08-29 23:58:02,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:58:02,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:58:03,077 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c[4604,4617] [2023-08-29 23:58:03,085 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:58:03,098 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 23:58:03,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:58:03,121 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c[4604,4617] [2023-08-29 23:58:03,125 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:58:03,135 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:58:03,172 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c[4604,4617] [2023-08-29 23:58:03,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:58:03,197 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:58:03,199 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:58:03,206 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:58:03,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:58:03 WrapperNode [2023-08-29 23:58:03,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:58:03,208 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:58:03,208 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:58:03,208 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:58:03,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:58:03" (1/1) ... [2023-08-29 23:58:03,240 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:58:03" (1/1) ... [2023-08-29 23:58:03,283 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 336 [2023-08-29 23:58:03,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:58:03,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:58:03,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:58:03,289 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:58:03,296 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:58:03" (1/1) ... [2023-08-29 23:58:03,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:58:03" (1/1) ... [2023-08-29 23:58:03,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:58:03" (1/1) ... [2023-08-29 23:58:03,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:58:03" (1/1) ... [2023-08-29 23:58:03,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:58:03" (1/1) ... [2023-08-29 23:58:03,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:58:03" (1/1) ... [2023-08-29 23:58:03,350 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:58:03" (1/1) ... [2023-08-29 23:58:03,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:58:03" (1/1) ... [2023-08-29 23:58:03,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:58:03,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:58:03,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:58:03,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:58:03,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:58:03" (1/1) ... [2023-08-29 23:58:03,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:58:03,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:58:03,390 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 23:58:03,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 23:58:03,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:58:03,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 23:58:03,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:58:03,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 23:58:03,478 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:58:03,478 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:58:03,478 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:58:03,478 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:58:03,478 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 23:58:03,478 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 23:58:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:58:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:58:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 23:58:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:58:03,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:58:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:58:03,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 23:58:03,481 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:58:03,644 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:58:03,646 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:58:04,258 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:58:04,521 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:58:04,521 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-29 23:58:04,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:58:04 BoogieIcfgContainer [2023-08-29 23:58:04,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:58:04,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:58:04,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:58:04,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:58:04,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:58:02" (1/3) ... [2023-08-29 23:58:04,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69e9624d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:58:04, skipping insertion in model container [2023-08-29 23:58:04,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:58:03" (2/3) ... [2023-08-29 23:58:04,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69e9624d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:58:04, skipping insertion in model container [2023-08-29 23:58:04,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:58:04" (3/3) ... [2023-08-29 23:58:04,533 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2023-08-29 23:58:04,547 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:58:04,548 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2023-08-29 23:58:04,548 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:58:04,664 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 23:58:04,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 275 transitions, 574 flow [2023-08-29 23:58:04,841 INFO L130 PetriNetUnfolder]: 19/272 cut-off events. [2023-08-29 23:58:04,841 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:58:04,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 272 events. 19/272 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 276 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 223. Up to 2 conditions per place. [2023-08-29 23:58:04,849 INFO L82 GeneralOperation]: Start removeDead. Operand has 266 places, 275 transitions, 574 flow [2023-08-29 23:58:04,858 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 268 transitions, 554 flow [2023-08-29 23:58:04,861 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:58:04,868 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 259 places, 268 transitions, 554 flow [2023-08-29 23:58:04,870 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 259 places, 268 transitions, 554 flow [2023-08-29 23:58:04,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 268 transitions, 554 flow [2023-08-29 23:58:04,906 INFO L130 PetriNetUnfolder]: 19/268 cut-off events. [2023-08-29 23:58:04,906 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:58:04,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 268 events. 19/268 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 278 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 223. Up to 2 conditions per place. [2023-08-29 23:58:04,909 INFO L119 LiptonReduction]: Number of co-enabled transitions 3276 [2023-08-29 23:58:33,327 INFO L134 LiptonReduction]: Checked pairs total: 10449 [2023-08-29 23:58:33,327 INFO L136 LiptonReduction]: Total number of compositions: 287 [2023-08-29 23:58:33,339 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:58:33,344 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;@53e8d8b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:58:33,345 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2023-08-29 23:58:33,348 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 23:58:33,348 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:58:33,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:58:33,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:58:33,349 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 23:58:33,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:58:33,354 INFO L85 PathProgramCache]: Analyzing trace with hash 43202, now seen corresponding path program 1 times [2023-08-29 23:58:33,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:58:33,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159110720] [2023-08-29 23:58:33,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:58:33,363 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:58:33,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:58:33,365 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:58:33,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 23:58:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:58:33,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:58:33,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:58:33,667 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 23:58:33,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 23:58:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:33,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:58:33,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:58:33,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159110720] [2023-08-29 23:58:33,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159110720] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:58:33,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:58:33,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:58:33,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873446934] [2023-08-29 23:58:33,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:58:33,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:58:33,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:58:33,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:58:33,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:58:33,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 562 [2023-08-29 23:58:33,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:33,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:58:33,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 562 [2023-08-29 23:58:33,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:58:35,747 INFO L130 PetriNetUnfolder]: 8211/11410 cut-off events. [2023-08-29 23:58:35,747 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-08-29 23:58:35,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23092 conditions, 11410 events. 8211/11410 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 59793 event pairs, 7140 based on Foata normal form. 0/3556 useless extension candidates. Maximal degree in co-relation 21710. Up to 11410 conditions per place. [2023-08-29 23:58:35,820 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 60 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-08-29 23:58:35,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 262 flow [2023-08-29 23:58:35,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:58:35,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:58:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 713 transitions. [2023-08-29 23:58:35,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42289442467378413 [2023-08-29 23:58:35,836 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 713 transitions. [2023-08-29 23:58:35,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 713 transitions. [2023-08-29 23:58:35,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:58:35,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 713 transitions. [2023-08-29 23:58:35,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:35,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:35,852 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:35,854 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 148 flow. Second operand 3 states and 713 transitions. [2023-08-29 23:58:35,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 262 flow [2023-08-29 23:58:35,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 61 transitions, 250 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 23:58:35,863 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 130 flow [2023-08-29 23:58:35,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2023-08-29 23:58:35,867 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -8 predicate places. [2023-08-29 23:58:35,867 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 130 flow [2023-08-29 23:58:35,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:35,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:58:35,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:58:35,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-29 23:58:36,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:58:36,083 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 23:58:36,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:58:36,084 INFO L85 PathProgramCache]: Analyzing trace with hash 43201, now seen corresponding path program 1 times [2023-08-29 23:58:36,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:58:36,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739632357] [2023-08-29 23:58:36,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:58:36,085 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:58:36,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:58:36,086 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:58:36,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 23:58:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:58:36,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:58:36,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:58:36,289 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:58:36,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:58:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:36,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:58:36,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:58:36,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739632357] [2023-08-29 23:58:36,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739632357] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:58:36,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:58:36,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:58:36,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617693193] [2023-08-29 23:58:36,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:58:36,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:58:36,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:58:36,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:58:36,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:58:36,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 562 [2023-08-29 23:58:36,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:36,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:58:36,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 562 [2023-08-29 23:58:36,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:58:39,648 INFO L130 PetriNetUnfolder]: 16421/22816 cut-off events. [2023-08-29 23:58:39,650 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2023-08-29 23:58:39,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45846 conditions, 22816 events. 16421/22816 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 1408. Compared 132587 event pairs, 14280 based on Foata normal form. 0/7111 useless extension candidates. Maximal degree in co-relation 45840. Up to 11411 conditions per place. [2023-08-29 23:58:39,771 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 112 selfloop transitions, 6 changer transitions 0/118 dead transitions. [2023-08-29 23:58:39,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 118 transitions, 486 flow [2023-08-29 23:58:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:58:39,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:58:39,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 769 transitions. [2023-08-29 23:58:39,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4561091340450771 [2023-08-29 23:58:39,774 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 769 transitions. [2023-08-29 23:58:39,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 769 transitions. [2023-08-29 23:58:39,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:58:39,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 769 transitions. [2023-08-29 23:58:39,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:39,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:39,781 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:39,781 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 130 flow. Second operand 3 states and 769 transitions. [2023-08-29 23:58:39,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 118 transitions, 486 flow [2023-08-29 23:58:39,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 118 transitions, 485 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:58:39,785 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 179 flow [2023-08-29 23:58:39,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2023-08-29 23:58:39,786 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -5 predicate places. [2023-08-29 23:58:39,786 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 179 flow [2023-08-29 23:58:39,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:39,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:58:39,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:58:39,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 23:58:39,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:58:39,999 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 23:58:39,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:58:39,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1342659, now seen corresponding path program 1 times [2023-08-29 23:58:40,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:58:40,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73550867] [2023-08-29 23:58:40,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:58:40,000 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:58:40,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:58:40,002 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:58:40,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 23:58:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:58:40,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:58:40,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:58:40,166 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:58:40,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:58:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:40,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:58:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:40,398 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:58:40,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73550867] [2023-08-29 23:58:40,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73550867] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:58:40,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:58:40,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:58:40,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515649586] [2023-08-29 23:58:40,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:58:40,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:58:40,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:58:40,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:58:40,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:58:41,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 562 [2023-08-29 23:58:41,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:41,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:58:41,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 562 [2023-08-29 23:58:41,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:58:46,240 INFO L130 PetriNetUnfolder]: 24641/34238 cut-off events. [2023-08-29 23:58:46,241 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2023-08-29 23:58:46,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68837 conditions, 34238 events. 24641/34238 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 1927. Compared 206499 event pairs, 21420 based on Foata normal form. 0/10687 useless extension candidates. Maximal degree in co-relation 68828. Up to 11412 conditions per place. [2023-08-29 23:58:46,416 INFO L137 encePairwiseOnDemand]: 550/562 looper letters, 164 selfloop transitions, 27 changer transitions 0/191 dead transitions. [2023-08-29 23:58:46,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 191 transitions, 865 flow [2023-08-29 23:58:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:58:46,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:58:46,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1406 transitions. [2023-08-29 23:58:46,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169632265717675 [2023-08-29 23:58:46,421 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1406 transitions. [2023-08-29 23:58:46,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1406 transitions. [2023-08-29 23:58:46,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:58:46,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1406 transitions. [2023-08-29 23:58:46,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 234.33333333333334) internal successors, (1406), 6 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:46,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:46,433 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:46,436 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 179 flow. Second operand 6 states and 1406 transitions. [2023-08-29 23:58:46,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 191 transitions, 865 flow [2023-08-29 23:58:46,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 191 transitions, 841 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:58:46,442 INFO L231 Difference]: Finished difference. Result has 71 places, 87 transitions, 371 flow [2023-08-29 23:58:46,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=371, PETRI_PLACES=71, PETRI_TRANSITIONS=87} [2023-08-29 23:58:46,443 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2023-08-29 23:58:46,443 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 87 transitions, 371 flow [2023-08-29 23:58:46,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:46,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:58:46,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:58:46,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 23:58:46,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:58:46,657 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 23:58:46,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:58:46,658 INFO L85 PathProgramCache]: Analyzing trace with hash 41679634, now seen corresponding path program 1 times [2023-08-29 23:58:46,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:58:46,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989162084] [2023-08-29 23:58:46,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:58:46,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:58:46,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:58:46,659 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:58:46,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 23:58:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:58:46,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:58:46,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:58:46,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:46,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:46,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:46,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:46,870 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-29 23:58:46,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-29 23:58:46,899 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-29 23:58:46,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-29 23:58:46,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:46,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:58:46,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:46,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:58:47,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:47,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:58:47,037 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:58:47,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989162084] [2023-08-29 23:58:47,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989162084] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:58:47,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:58:47,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:58:47,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160347228] [2023-08-29 23:58:47,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:58:47,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:58:47,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:58:47,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:58:47,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:58:47,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 562 [2023-08-29 23:58:47,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 87 transitions, 371 flow. Second operand has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:47,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:58:47,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 562 [2023-08-29 23:58:47,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:58:50,002 INFO L130 PetriNetUnfolder]: 18906/26589 cut-off events. [2023-08-29 23:58:50,002 INFO L131 PetriNetUnfolder]: For 134/134 co-relation queries the response was YES. [2023-08-29 23:58:50,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53601 conditions, 26589 events. 18906/26589 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 1563. Compared 161101 event pairs, 16380 based on Foata normal form. 0/9008 useless extension candidates. Maximal degree in co-relation 53588. Up to 26589 conditions per place. [2023-08-29 23:58:50,329 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 82 selfloop transitions, 1 changer transitions 0/83 dead transitions. [2023-08-29 23:58:50,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 83 transitions, 517 flow [2023-08-29 23:58:50,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:58:50,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:58:50,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 730 transitions. [2023-08-29 23:58:50,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43297746144721233 [2023-08-29 23:58:50,335 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 730 transitions. [2023-08-29 23:58:50,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 730 transitions. [2023-08-29 23:58:50,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:58:50,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 730 transitions. [2023-08-29 23:58:50,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:50,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:50,341 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:50,341 INFO L175 Difference]: Start difference. First operand has 71 places, 87 transitions, 371 flow. Second operand 3 states and 730 transitions. [2023-08-29 23:58:50,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 83 transitions, 517 flow [2023-08-29 23:58:50,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 83 transitions, 487 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-29 23:58:50,345 INFO L231 Difference]: Finished difference. Result has 70 places, 83 transitions, 323 flow [2023-08-29 23:58:50,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=323, PETRI_PLACES=70, PETRI_TRANSITIONS=83} [2023-08-29 23:58:50,347 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 1 predicate places. [2023-08-29 23:58:50,350 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 83 transitions, 323 flow [2023-08-29 23:58:50,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:50,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:58:50,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:58:50,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-29 23:58:50,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:58:50,560 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 23:58:50,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:58:50,560 INFO L85 PathProgramCache]: Analyzing trace with hash 41679636, now seen corresponding path program 1 times [2023-08-29 23:58:50,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:58:50,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204610622] [2023-08-29 23:58:50,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:58:50,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:58:50,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:58:50,564 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:58:50,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 23:58:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:58:50,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 23:58:50,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:58:50,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:50,743 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-29 23:58:50,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-29 23:58:50,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:50,985 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-29 23:58:50,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-08-29 23:58:51,276 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-08-29 23:58:51,277 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 3 case distinctions, treesize of input 55 treesize of output 80 [2023-08-29 23:58:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:51,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:58:51,681 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:58:51,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204610622] [2023-08-29 23:58:51,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204610622] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:58:51,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:58:51,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:58:51,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804068758] [2023-08-29 23:58:51,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:58:51,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:58:51,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:58:51,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:58:51,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:58:52,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 562 [2023-08-29 23:58:52,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 83 transitions, 323 flow. Second operand has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:52,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:58:52,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 562 [2023-08-29 23:58:52,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:58:54,104 INFO L130 PetriNetUnfolder]: 13171/18940 cut-off events. [2023-08-29 23:58:54,104 INFO L131 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2023-08-29 23:58:54,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38277 conditions, 18940 events. 13171/18940 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 114299 event pairs, 11340 based on Foata normal form. 0/7328 useless extension candidates. Maximal degree in co-relation 38263. Up to 18940 conditions per place. [2023-08-29 23:58:54,184 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 78 selfloop transitions, 1 changer transitions 0/79 dead transitions. [2023-08-29 23:58:54,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 79 transitions, 461 flow [2023-08-29 23:58:54,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:58:54,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:58:54,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 728 transitions. [2023-08-29 23:58:54,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431791221826809 [2023-08-29 23:58:54,189 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 728 transitions. [2023-08-29 23:58:54,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 728 transitions. [2023-08-29 23:58:54,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:58:54,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 728 transitions. [2023-08-29 23:58:54,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:54,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:54,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:54,195 INFO L175 Difference]: Start difference. First operand has 70 places, 83 transitions, 323 flow. Second operand 3 states and 728 transitions. [2023-08-29 23:58:54,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 79 transitions, 461 flow [2023-08-29 23:58:54,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 79 transitions, 460 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:58:54,198 INFO L231 Difference]: Finished difference. Result has 69 places, 79 transitions, 304 flow [2023-08-29 23:58:54,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=304, PETRI_PLACES=69, PETRI_TRANSITIONS=79} [2023-08-29 23:58:54,199 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 0 predicate places. [2023-08-29 23:58:54,199 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 79 transitions, 304 flow [2023-08-29 23:58:54,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:54,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:58:54,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:58:54,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 23:58:54,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:58:54,409 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 23:58:54,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:58:54,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1399456870, now seen corresponding path program 1 times [2023-08-29 23:58:54,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:58:54,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117198428] [2023-08-29 23:58:54,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:58:54,410 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:58:54,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:58:54,411 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:58:54,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 23:58:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:58:54,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:58:54,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:58:54,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:54,606 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-29 23:58:54,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-29 23:58:54,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:54,801 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-08-29 23:58:54,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2023-08-29 23:58:54,945 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-29 23:58:54,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-29 23:58:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:55,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:58:55,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:58:55,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117198428] [2023-08-29 23:58:55,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117198428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:58:55,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:58:55,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:58:55,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831702363] [2023-08-29 23:58:55,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:58:55,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:58:55,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:58:55,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:58:55,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:58:55,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 562 [2023-08-29 23:58:55,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 79 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 224.5) internal successors, (898), 4 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:55,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:58:55,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 562 [2023-08-29 23:58:55,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:58:57,477 INFO L130 PetriNetUnfolder]: 12838/18421 cut-off events. [2023-08-29 23:58:57,477 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-29 23:58:57,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37240 conditions, 18421 events. 12838/18421 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 1058. Compared 110448 event pairs, 11052 based on Foata normal form. 0/7232 useless extension candidates. Maximal degree in co-relation 37225. Up to 18421 conditions per place. [2023-08-29 23:58:57,571 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 76 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2023-08-29 23:58:57,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 77 transitions, 454 flow [2023-08-29 23:58:57,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:58:57,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:58:57,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 726 transitions. [2023-08-29 23:58:57,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306049822064057 [2023-08-29 23:58:57,575 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 726 transitions. [2023-08-29 23:58:57,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 726 transitions. [2023-08-29 23:58:57,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:58:57,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 726 transitions. [2023-08-29 23:58:57,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:57,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:57,580 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:57,580 INFO L175 Difference]: Start difference. First operand has 69 places, 79 transitions, 304 flow. Second operand 3 states and 726 transitions. [2023-08-29 23:58:57,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 77 transitions, 454 flow [2023-08-29 23:58:57,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 77 transitions, 453 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:58:57,583 INFO L231 Difference]: Finished difference. Result has 68 places, 77 transitions, 301 flow [2023-08-29 23:58:57,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=68, PETRI_TRANSITIONS=77} [2023-08-29 23:58:57,584 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -1 predicate places. [2023-08-29 23:58:57,584 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 77 transitions, 301 flow [2023-08-29 23:58:57,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.5) internal successors, (898), 4 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:57,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:58:57,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:58:57,599 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 [2023-08-29 23:58:57,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:58:57,794 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 23:58:57,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:58:57,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1399456871, now seen corresponding path program 1 times [2023-08-29 23:58:57,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:58:57,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668619210] [2023-08-29 23:58:57,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:58:57,796 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:58:57,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:58:57,797 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:58:57,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 23:58:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:58:57,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 23:58:57,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:58:57,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:57,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:57,977 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-08-29 23:58:57,977 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 2 case distinctions, treesize of input 15 treesize of output 35 [2023-08-29 23:58:57,999 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 26 treesize of output 24 [2023-08-29 23:58:58,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:58,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:58:58,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:58:58,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:58:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:58,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:58:58,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:58:58,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668619210] [2023-08-29 23:58:58,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668619210] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:58:58,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:58:58,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:58:58,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249045417] [2023-08-29 23:58:58,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:58:58,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:58:58,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:58:58,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:58:58,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:58:58,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 562 [2023-08-29 23:58:58,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 77 transitions, 301 flow. Second operand has 4 states, 4 states have (on average 224.5) internal successors, (898), 4 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:58,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:58:58,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 562 [2023-08-29 23:58:58,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:59:00,060 INFO L130 PetriNetUnfolder]: 12505/17902 cut-off events. [2023-08-29 23:59:00,060 INFO L131 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2023-08-29 23:59:00,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36203 conditions, 17902 events. 12505/17902 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 106551 event pairs, 10764 based on Foata normal form. 0/7136 useless extension candidates. Maximal degree in co-relation 36187. Up to 17902 conditions per place. [2023-08-29 23:59:00,221 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 74 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2023-08-29 23:59:00,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 447 flow [2023-08-29 23:59:00,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:59:00,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:59:00,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2023-08-29 23:59:00,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4294187425860024 [2023-08-29 23:59:00,224 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2023-08-29 23:59:00,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2023-08-29 23:59:00,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:59:00,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2023-08-29 23:59:00,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:00,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:00,228 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:00,228 INFO L175 Difference]: Start difference. First operand has 68 places, 77 transitions, 301 flow. Second operand 3 states and 724 transitions. [2023-08-29 23:59:00,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 447 flow [2023-08-29 23:59:00,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:59:00,231 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 298 flow [2023-08-29 23:59:00,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2023-08-29 23:59:00,232 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -2 predicate places. [2023-08-29 23:59:00,232 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 298 flow [2023-08-29 23:59:00,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.5) internal successors, (898), 4 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:00,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:59:00,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:59:00,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 23:59:00,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:00,442 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 23:59:00,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:59:00,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1399456876, now seen corresponding path program 1 times [2023-08-29 23:59:00,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:59:00,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [492830796] [2023-08-29 23:59:00,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:59:00,443 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:00,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:59:00,444 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:59:00,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 23:59:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:59:00,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:59:00,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:59:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:59:00,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:59:00,529 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:59:00,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [492830796] [2023-08-29 23:59:00,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [492830796] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:59:00,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:59:00,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:59:00,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231363907] [2023-08-29 23:59:00,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:59:00,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:59:00,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:59:00,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:59:00,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:59:00,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 562 [2023-08-29 23:59:00,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 298 flow. Second operand has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:00,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:59:00,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 562 [2023-08-29 23:59:00,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:59:02,271 INFO L130 PetriNetUnfolder]: 13741/19798 cut-off events. [2023-08-29 23:59:02,272 INFO L131 PetriNetUnfolder]: For 231/231 co-relation queries the response was YES. [2023-08-29 23:59:02,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40005 conditions, 19798 events. 13741/19798 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 1234. Compared 123880 event pairs, 4383 based on Foata normal form. 0/8084 useless extension candidates. Maximal degree in co-relation 39988. Up to 17944 conditions per place. [2023-08-29 23:59:02,379 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 97 selfloop transitions, 3 changer transitions 0/100 dead transitions. [2023-08-29 23:59:02,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 100 transitions, 552 flow [2023-08-29 23:59:02,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:59:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:59:02,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 764 transitions. [2023-08-29 23:59:02,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531435349940688 [2023-08-29 23:59:02,382 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 764 transitions. [2023-08-29 23:59:02,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 764 transitions. [2023-08-29 23:59:02,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:59:02,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 764 transitions. [2023-08-29 23:59:02,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:02,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:02,387 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:02,387 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 298 flow. Second operand 3 states and 764 transitions. [2023-08-29 23:59:02,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 100 transitions, 552 flow [2023-08-29 23:59:02,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 100 transitions, 551 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:59:02,390 INFO L231 Difference]: Finished difference. Result has 69 places, 77 transitions, 324 flow [2023-08-29 23:59:02,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=69, PETRI_TRANSITIONS=77} [2023-08-29 23:59:02,391 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 0 predicate places. [2023-08-29 23:59:02,391 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 77 transitions, 324 flow [2023-08-29 23:59:02,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:02,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:59:02,392 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 23:59:02,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 23:59:02,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:02,593 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 23:59:02,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:59:02,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1347852609, now seen corresponding path program 2 times [2023-08-29 23:59:02,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:59:02,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922131979] [2023-08-29 23:59:02,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:59:02,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:02,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:59:02,595 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:59:02,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 23:59:02,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:59:02,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:59:02,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:59:02,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:59:02,806 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:59:02,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:59:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:59:02,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:59:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:59:03,481 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:59:03,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922131979] [2023-08-29 23:59:03,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922131979] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:59:03,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:59:03,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:59:03,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692793635] [2023-08-29 23:59:03,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:59:03,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:59:03,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:59:03,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:59:03,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:59:07,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 562 [2023-08-29 23:59:07,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 77 transitions, 324 flow. Second operand has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:07,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:59:07,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 562 [2023-08-29 23:59:07,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:59:09,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:59:10,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:59:11,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:59:13,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:59:15,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:59:17,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:59:18,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:59:20,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:59:22,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:59:24,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:59:25,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:59:28,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:59:38,094 INFO L130 PetriNetUnfolder]: 45784/65950 cut-off events. [2023-08-29 23:59:38,094 INFO L131 PetriNetUnfolder]: For 5916/5916 co-relation queries the response was YES. [2023-08-29 23:59:38,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145479 conditions, 65950 events. 45784/65950 cut-off events. For 5916/5916 co-relation queries the response was YES. Maximal size of possible extension queue 2282. Compared 450596 event pairs, 38020 based on Foata normal form. 18/33434 useless extension candidates. Maximal degree in co-relation 145460. Up to 11561 conditions per place. [2023-08-29 23:59:38,420 INFO L137 encePairwiseOnDemand]: 552/562 looper letters, 468 selfloop transitions, 52 changer transitions 0/520 dead transitions. [2023-08-29 23:59:38,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 520 transitions, 2636 flow [2023-08-29 23:59:38,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 23:59:38,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 23:59:38,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2966 transitions. [2023-08-29 23:59:38,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43979833926453143 [2023-08-29 23:59:38,427 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2966 transitions. [2023-08-29 23:59:38,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2966 transitions. [2023-08-29 23:59:38,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:59:38,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2966 transitions. [2023-08-29 23:59:38,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 247.16666666666666) internal successors, (2966), 12 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:38,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:38,444 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:38,444 INFO L175 Difference]: Start difference. First operand has 69 places, 77 transitions, 324 flow. Second operand 12 states and 2966 transitions. [2023-08-29 23:59:38,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 520 transitions, 2636 flow [2023-08-29 23:59:38,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 520 transitions, 2615 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:59:38,460 INFO L231 Difference]: Finished difference. Result has 86 places, 108 transitions, 711 flow [2023-08-29 23:59:38,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=711, PETRI_PLACES=86, PETRI_TRANSITIONS=108} [2023-08-29 23:59:38,461 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 17 predicate places. [2023-08-29 23:59:38,462 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 108 transitions, 711 flow [2023-08-29 23:59:38,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:38,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:59:38,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:59:38,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 23:59:38,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:38,672 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 23:59:38,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:59:38,673 INFO L85 PathProgramCache]: Analyzing trace with hash 553320635, now seen corresponding path program 1 times [2023-08-29 23:59:38,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:59:38,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381969198] [2023-08-29 23:59:38,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:59:38,673 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:38,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:59:38,674 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:59:38,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 23:59:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:59:38,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:59:38,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:59:38,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:59:38,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:59:38,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:59:38,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381969198] [2023-08-29 23:59:38,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381969198] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:59:38,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:59:38,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:59:38,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047649998] [2023-08-29 23:59:38,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:59:38,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:59:38,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:59:38,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:59:38,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:59:38,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 562 [2023-08-29 23:59:38,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 108 transitions, 711 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) [2023-08-29 23:59:38,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:59:38,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 562 [2023-08-29 23:59:38,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:59:44,825 INFO L130 PetriNetUnfolder]: 39804/57270 cut-off events. [2023-08-29 23:59:44,825 INFO L131 PetriNetUnfolder]: For 2741/2741 co-relation queries the response was YES. [2023-08-29 23:59:44,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125668 conditions, 57270 events. 39804/57270 cut-off events. For 2741/2741 co-relation queries the response was YES. Maximal size of possible extension queue 1771. Compared 375646 event pairs, 14150 based on Foata normal form. 0/30268 useless extension candidates. Maximal degree in co-relation 125641. Up to 48391 conditions per place. [2023-08-29 23:59:45,093 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 129 selfloop transitions, 2 changer transitions 0/131 dead transitions. [2023-08-29 23:59:45,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 131 transitions, 1032 flow [2023-08-29 23:59:45,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:59:45,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:59:45,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 761 transitions. [2023-08-29 23:59:45,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513641755634638 [2023-08-29 23:59:45,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 761 transitions. [2023-08-29 23:59:45,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 761 transitions. [2023-08-29 23:59:45,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:59:45,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 761 transitions. [2023-08-29 23:59:45,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:45,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:45,100 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:45,101 INFO L175 Difference]: Start difference. First operand has 86 places, 108 transitions, 711 flow. Second operand 3 states and 761 transitions. [2023-08-29 23:59:45,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 131 transitions, 1032 flow [2023-08-29 23:59:45,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 131 transitions, 939 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-08-29 23:59:45,106 INFO L231 Difference]: Finished difference. Result has 85 places, 108 transitions, 630 flow [2023-08-29 23:59:45,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=630, PETRI_PLACES=85, PETRI_TRANSITIONS=108} [2023-08-29 23:59:45,106 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 16 predicate places. [2023-08-29 23:59:45,107 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 108 transitions, 630 flow [2023-08-29 23:59:45,107 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) [2023-08-29 23:59:45,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:59:45,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:59:45,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 23:59:45,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:45,316 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 23:59:45,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:59:45,317 INFO L85 PathProgramCache]: Analyzing trace with hash 553320669, now seen corresponding path program 1 times [2023-08-29 23:59:45,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:59:45,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117269967] [2023-08-29 23:59:45,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:59:45,317 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:45,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:59:45,318 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:59:45,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 23:59:45,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:59:45,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 23:59:45,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:59:45,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:59:45,502 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-08-29 23:59:45,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2023-08-29 23:59:45,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:59:45,518 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 44 treesize of output 42 [2023-08-29 23:59:45,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:59:45,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:59:45,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:59:45,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:59:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:59:45,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:59:45,662 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:59:45,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117269967] [2023-08-29 23:59:45,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117269967] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:59:45,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:59:45,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:59:45,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21131568] [2023-08-29 23:59:45,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:59:45,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:59:45,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:59:45,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:59:45,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:59:45,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 562 [2023-08-29 23:59:45,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 108 transitions, 630 flow. Second operand has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:45,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:59:45,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 562 [2023-08-29 23:59:45,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:59:51,842 INFO L130 PetriNetUnfolder]: 39584/56830 cut-off events. [2023-08-29 23:59:51,843 INFO L131 PetriNetUnfolder]: For 5170/5170 co-relation queries the response was YES. [2023-08-29 23:59:51,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132122 conditions, 56830 events. 39584/56830 cut-off events. For 5170/5170 co-relation queries the response was YES. Maximal size of possible extension queue 1804. Compared 380232 event pairs, 34280 based on Foata normal form. 0/32110 useless extension candidates. Maximal degree in co-relation 132093. Up to 56830 conditions per place. [2023-08-29 23:59:52,115 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 105 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2023-08-29 23:59:52,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 106 transitions, 838 flow [2023-08-29 23:59:52,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:59:52,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:59:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 722 transitions. [2023-08-29 23:59:52,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42823250296559906 [2023-08-29 23:59:52,118 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 722 transitions. [2023-08-29 23:59:52,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 722 transitions. [2023-08-29 23:59:52,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:59:52,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 722 transitions. [2023-08-29 23:59:52,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:52,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:52,123 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:52,123 INFO L175 Difference]: Start difference. First operand has 85 places, 108 transitions, 630 flow. Second operand 3 states and 722 transitions. [2023-08-29 23:59:52,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 106 transitions, 838 flow [2023-08-29 23:59:52,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 106 transitions, 836 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:59:52,128 INFO L231 Difference]: Finished difference. Result has 84 places, 106 transitions, 626 flow [2023-08-29 23:59:52,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=626, PETRI_PLACES=84, PETRI_TRANSITIONS=106} [2023-08-29 23:59:52,129 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 15 predicate places. [2023-08-29 23:59:52,129 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 106 transitions, 626 flow [2023-08-29 23:59:52,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:52,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:59:52,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:59:52,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 23:59:52,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:52,340 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 23:59:52,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:59:52,340 INFO L85 PathProgramCache]: Analyzing trace with hash 553320671, now seen corresponding path program 1 times [2023-08-29 23:59:52,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:59:52,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573522167] [2023-08-29 23:59:52,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:59:52,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:52,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:59:52,341 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:59:52,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 23:59:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:59:52,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:59:52,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:59:52,492 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-29 23:59:52,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-29 23:59:52,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:59:52,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 23:59:52,563 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 23:59:52,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 23:59:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:59:52,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:59:52,614 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:59:52,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573522167] [2023-08-29 23:59:52,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573522167] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:59:52,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:59:52,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:59:52,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191939408] [2023-08-29 23:59:52,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:59:52,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:59:52,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:59:52,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:59:52,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:59:52,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 562 [2023-08-29 23:59:52,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 106 transitions, 626 flow. Second operand has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:52,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:59:52,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 562 [2023-08-29 23:59:52,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:59:59,050 INFO L130 PetriNetUnfolder]: 39364/56390 cut-off events. [2023-08-29 23:59:59,050 INFO L131 PetriNetUnfolder]: For 5140/5140 co-relation queries the response was YES. [2023-08-29 23:59:59,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130933 conditions, 56390 events. 39364/56390 cut-off events. For 5140/5140 co-relation queries the response was YES. Maximal size of possible extension queue 1791. Compared 375838 event pairs, 34080 based on Foata normal form. 0/31990 useless extension candidates. Maximal degree in co-relation 130903. Up to 56390 conditions per place. [2023-08-29 23:59:59,327 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 103 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2023-08-29 23:59:59,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 104 transitions, 830 flow [2023-08-29 23:59:59,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:59:59,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:59:59,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 708 transitions. [2023-08-29 23:59:59,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199288256227758 [2023-08-29 23:59:59,330 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 708 transitions. [2023-08-29 23:59:59,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 708 transitions. [2023-08-29 23:59:59,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:59:59,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 708 transitions. [2023-08-29 23:59:59,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:59,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:59,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:59,336 INFO L175 Difference]: Start difference. First operand has 84 places, 106 transitions, 626 flow. Second operand 3 states and 708 transitions. [2023-08-29 23:59:59,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 104 transitions, 830 flow [2023-08-29 23:59:59,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 104 transitions, 829 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:59:59,341 INFO L231 Difference]: Finished difference. Result has 83 places, 104 transitions, 623 flow [2023-08-29 23:59:59,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=623, PETRI_PLACES=83, PETRI_TRANSITIONS=104} [2023-08-29 23:59:59,342 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 14 predicate places. [2023-08-29 23:59:59,342 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 104 transitions, 623 flow [2023-08-29 23:59:59,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:59,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:59:59,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:59:59,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-08-29 23:59:59,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:59,552 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 23:59:59,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:59:59,552 INFO L85 PathProgramCache]: Analyzing trace with hash -834747525, now seen corresponding path program 1 times [2023-08-29 23:59:59,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:59:59,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582061845] [2023-08-29 23:59:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:59:59,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:59,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:59:59,554 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:59:59,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 23:59:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:59:59,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 23:59:59,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:59:59,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:59:59,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:59:59,705 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:59:59,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582061845] [2023-08-29 23:59:59,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582061845] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:59:59,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:59:59,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:59:59,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772475965] [2023-08-29 23:59:59,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:59:59,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:59:59,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:59:59,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:59:59,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:59:59,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 562 [2023-08-29 23:59:59,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 104 transitions, 623 flow. Second operand has 4 states, 4 states have (on average 219.5) internal successors, (878), 4 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:59,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:59:59,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 562 [2023-08-29 23:59:59,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:00:06,643 INFO L130 PetriNetUnfolder]: 39746/57226 cut-off events. [2023-08-30 00:00:06,644 INFO L131 PetriNetUnfolder]: For 5343/5343 co-relation queries the response was YES. [2023-08-30 00:00:06,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132804 conditions, 57226 events. 39746/57226 cut-off events. For 5343/5343 co-relation queries the response was YES. Maximal size of possible extension queue 1801. Compared 384253 event pairs, 34450 based on Foata normal form. 140/32966 useless extension candidates. Maximal degree in co-relation 132773. Up to 56389 conditions per place. [2023-08-30 00:00:06,982 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 155 selfloop transitions, 3 changer transitions 0/158 dead transitions. [2023-08-30 00:00:06,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 158 transitions, 1284 flow [2023-08-30 00:00:06,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:00:06,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:00:06,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 943 transitions. [2023-08-30 00:00:06,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4194839857651246 [2023-08-30 00:00:06,985 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 943 transitions. [2023-08-30 00:00:06,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 943 transitions. [2023-08-30 00:00:06,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:00:06,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 943 transitions. [2023-08-30 00:00:06,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 235.75) internal successors, (943), 4 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:06,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:06,990 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:06,991 INFO L175 Difference]: Start difference. First operand has 83 places, 104 transitions, 623 flow. Second operand 4 states and 943 transitions. [2023-08-30 00:00:06,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 158 transitions, 1284 flow [2023-08-30 00:00:06,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 158 transitions, 1283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:00:06,997 INFO L231 Difference]: Finished difference. Result has 86 places, 104 transitions, 635 flow [2023-08-30 00:00:06,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=635, PETRI_PLACES=86, PETRI_TRANSITIONS=104} [2023-08-30 00:00:06,998 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 17 predicate places. [2023-08-30 00:00:06,998 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 104 transitions, 635 flow [2023-08-30 00:00:06,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.5) internal successors, (878), 4 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:06,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:00:06,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:00:07,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 00:00:07,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:00:07,209 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 00:00:07,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:00:07,209 INFO L85 PathProgramCache]: Analyzing trace with hash -540576387, now seen corresponding path program 1 times [2023-08-30 00:00:07,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:00:07,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586836116] [2023-08-30 00:00:07,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:00:07,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:00:07,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:00:07,211 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:00:07,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 00:00:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:00:07,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 00:00:07,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:00:07,471 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:00:07,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:00:07,552 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:00:07,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:00:07,699 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 00:00:07,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 00:00:07,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 00:00:07,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:00:07,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 00:00:07,761 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 00:00:07,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 00:00:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:00:07,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:00:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:00:12,405 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:00:12,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586836116] [2023-08-30 00:00:12,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586836116] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:00:12,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:00:12,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:00:12,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034884017] [2023-08-30 00:00:12,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:00:12,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:00:12,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:00:12,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:00:12,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:00:15,201 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] [2023-08-30 00:00:19,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:00:21,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:00:25,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:00:29,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:00:31,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:00:33,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:00:36,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:00:39,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:00:39,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 562 [2023-08-30 00:00:39,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 104 transitions, 635 flow. Second operand has 10 states, 10 states have (on average 177.2) internal successors, (1772), 10 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:39,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:00:39,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 562 [2023-08-30 00:00:39,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:00:50,815 WARN L222 SmtUtils]: Spent 10.62s on a formula simplification. DAG size of input: 78 DAG size of output: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:00:56,239 WARN L222 SmtUtils]: Spent 5.31s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:00:58,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:01:12,674 WARN L222 SmtUtils]: Spent 7.45s on a formula simplification. DAG size of input: 77 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:01:14,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:01:24,508 WARN L222 SmtUtils]: Spent 8.65s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:01:46,916 INFO L130 PetriNetUnfolder]: 70290/101558 cut-off events. [2023-08-30 00:01:46,916 INFO L131 PetriNetUnfolder]: For 15749/15749 co-relation queries the response was YES. [2023-08-30 00:01:47,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243648 conditions, 101558 events. 70290/101558 cut-off events. For 15749/15749 co-relation queries the response was YES. Maximal size of possible extension queue 3030. Compared 732735 event pairs, 59410 based on Foata normal form. 4840/70538 useless extension candidates. Maximal degree in co-relation 243615. Up to 56331 conditions per place. [2023-08-30 00:01:47,590 INFO L137 encePairwiseOnDemand]: 544/562 looper letters, 240 selfloop transitions, 45 changer transitions 0/285 dead transitions. [2023-08-30 00:01:47,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 285 transitions, 2133 flow [2023-08-30 00:01:47,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 00:01:47,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 00:01:47,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2821 transitions. [2023-08-30 00:01:47,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.334638196915777 [2023-08-30 00:01:47,596 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2821 transitions. [2023-08-30 00:01:47,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2821 transitions. [2023-08-30 00:01:47,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:01:47,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2821 transitions. [2023-08-30 00:01:47,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 188.06666666666666) internal successors, (2821), 15 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:47,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 562.0) internal successors, (8992), 16 states have internal predecessors, (8992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:47,610 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 562.0) internal successors, (8992), 16 states have internal predecessors, (8992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:47,610 INFO L175 Difference]: Start difference. First operand has 86 places, 104 transitions, 635 flow. Second operand 15 states and 2821 transitions. [2023-08-30 00:01:47,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 285 transitions, 2133 flow [2023-08-30 00:01:47,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 285 transitions, 2127 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 00:01:47,639 INFO L231 Difference]: Finished difference. Result has 105 places, 134 transitions, 1113 flow [2023-08-30 00:01:47,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1113, PETRI_PLACES=105, PETRI_TRANSITIONS=134} [2023-08-30 00:01:47,639 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 36 predicate places. [2023-08-30 00:01:47,640 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 134 transitions, 1113 flow [2023-08-30 00:01:47,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 177.2) internal successors, (1772), 10 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:47,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:01:47,640 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 00:01:47,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 00:01:47,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:01:47,851 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 00:01:47,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:01:47,852 INFO L85 PathProgramCache]: Analyzing trace with hash -598308351, now seen corresponding path program 3 times [2023-08-30 00:01:47,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:01:47,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037369345] [2023-08-30 00:01:47,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:01:47,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:01:47,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:01:47,856 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:01:47,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 00:01:48,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 00:01:48,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:01:48,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:01:48,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:01:48,226 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:01:48,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:01:48,825 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:01:48,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:01:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:01:51,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:01:51,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037369345] [2023-08-30 00:01:51,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037369345] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:01:51,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:01:51,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 00:01:51,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847270622] [2023-08-30 00:01:51,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:01:51,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:01:51,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:01:51,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:01:51,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:02:16,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 562 [2023-08-30 00:02:16,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 134 transitions, 1113 flow. Second operand has 24 states, 24 states have (on average 205.0) internal successors, (4920), 24 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:16,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:02:16,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 562 [2023-08-30 00:02:16,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:02:26,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:28,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:30,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:32,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:34,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:36,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:38,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:40,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:42,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:44,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:49,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:51,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:53,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:55,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:57,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:02:59,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:03:01,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:03:03,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:03:05,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:03:07,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:03:39,939 INFO L130 PetriNetUnfolder]: 91383/132035 cut-off events. [2023-08-30 00:03:39,939 INFO L131 PetriNetUnfolder]: For 56820/56820 co-relation queries the response was YES. [2023-08-30 00:03:40,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368891 conditions, 132035 events. 91383/132035 cut-off events. For 56820/56820 co-relation queries the response was YES. Maximal size of possible extension queue 3336. Compared 966870 event pairs, 77233 based on Foata normal form. 36/88365 useless extension candidates. Maximal degree in co-relation 368851. Up to 25689 conditions per place. [2023-08-30 00:03:40,860 INFO L137 encePairwiseOnDemand]: 552/562 looper letters, 585 selfloop transitions, 105 changer transitions 0/690 dead transitions. [2023-08-30 00:03:40,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 690 transitions, 5071 flow [2023-08-30 00:03:40,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:03:40,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:03:40,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5527 transitions. [2023-08-30 00:03:40,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097716488730724 [2023-08-30 00:03:40,869 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5527 transitions. [2023-08-30 00:03:40,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5527 transitions. [2023-08-30 00:03:40,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:40,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5527 transitions. [2023-08-30 00:03:40,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 230.29166666666666) internal successors, (5527), 24 states have internal predecessors, (5527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:40,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 562.0) internal successors, (14050), 25 states have internal predecessors, (14050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:40,892 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 562.0) internal successors, (14050), 25 states have internal predecessors, (14050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:40,893 INFO L175 Difference]: Start difference. First operand has 105 places, 134 transitions, 1113 flow. Second operand 24 states and 5527 transitions. [2023-08-30 00:03:40,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 690 transitions, 5071 flow [2023-08-30 00:03:41,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 690 transitions, 5050 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 00:03:41,367 INFO L231 Difference]: Finished difference. Result has 140 places, 173 transitions, 1747 flow [2023-08-30 00:03:41,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1747, PETRI_PLACES=140, PETRI_TRANSITIONS=173} [2023-08-30 00:03:41,368 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 71 predicate places. [2023-08-30 00:03:41,368 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 173 transitions, 1747 flow [2023-08-30 00:03:41,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 205.0) internal successors, (4920), 24 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:41,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:41,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:41,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 00:03:41,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:03:41,583 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 00:03:41,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:41,584 INFO L85 PathProgramCache]: Analyzing trace with hash 422002152, now seen corresponding path program 1 times [2023-08-30 00:03:41,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:03:41,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60148853] [2023-08-30 00:03:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:41,584 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:03:41,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:03:41,585 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:03:41,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 00:03:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:41,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:03:41,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:03:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:03:41,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:03:41,728 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:03:41,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60148853] [2023-08-30 00:03:41,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60148853] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:03:41,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:03:41,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:03:41,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521487632] [2023-08-30 00:03:41,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:03:41,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:03:41,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:03:41,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:03:41,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:03:41,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 562 [2023-08-30 00:03:41,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 173 transitions, 1747 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) [2023-08-30 00:03:41,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:41,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 562 [2023-08-30 00:03:41,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:59,197 INFO L130 PetriNetUnfolder]: 83479/120829 cut-off events. [2023-08-30 00:03:59,198 INFO L131 PetriNetUnfolder]: For 58902/58902 co-relation queries the response was YES. [2023-08-30 00:03:59,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340236 conditions, 120829 events. 83479/120829 cut-off events. For 58902/58902 co-relation queries the response was YES. Maximal size of possible extension queue 3083. Compared 862467 event pairs, 30264 based on Foata normal form. 3250/82869 useless extension candidates. Maximal degree in co-relation 340182. Up to 108044 conditions per place. [2023-08-30 00:04:00,353 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 200 selfloop transitions, 2 changer transitions 0/202 dead transitions. [2023-08-30 00:04:00,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 202 transitions, 2282 flow [2023-08-30 00:04:00,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:04:00,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:04:00,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 764 transitions. [2023-08-30 00:04:00,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531435349940688 [2023-08-30 00:04:00,355 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 764 transitions. [2023-08-30 00:04:00,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 764 transitions. [2023-08-30 00:04:00,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:04:00,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 764 transitions. [2023-08-30 00:04:00,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:00,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:00,359 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:00,359 INFO L175 Difference]: Start difference. First operand has 140 places, 173 transitions, 1747 flow. Second operand 3 states and 764 transitions. [2023-08-30 00:04:00,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 202 transitions, 2282 flow [2023-08-30 00:04:00,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 202 transitions, 2055 flow, removed 39 selfloop flow, removed 10 redundant places. [2023-08-30 00:04:00,671 INFO L231 Difference]: Finished difference. Result has 133 places, 174 transitions, 1536 flow [2023-08-30 00:04:00,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1536, PETRI_PLACES=133, PETRI_TRANSITIONS=174} [2023-08-30 00:04:00,672 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 64 predicate places. [2023-08-30 00:04:00,672 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 174 transitions, 1536 flow [2023-08-30 00:04:00,672 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) [2023-08-30 00:04:00,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:04:00,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:04:00,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 00:04:00,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:04:00,887 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 00:04:00,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:04:00,887 INFO L85 PathProgramCache]: Analyzing trace with hash 422002406, now seen corresponding path program 1 times [2023-08-30 00:04:00,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:04:00,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534264520] [2023-08-30 00:04:00,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:04:00,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:04:00,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:04:00,889 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:04:00,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 00:04:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:04:01,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:04:01,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:04:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:04:01,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:04:01,136 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:04:01,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534264520] [2023-08-30 00:04:01,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534264520] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:04:01,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:04:01,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:04:01,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42225580] [2023-08-30 00:04:01,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:04:01,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:04:01,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:04:01,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:04:01,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:04:01,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 562 [2023-08-30 00:04:01,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 174 transitions, 1536 flow. Second operand has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:01,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:04:01,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 562 [2023-08-30 00:04:01,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:04:17,579 INFO L130 PetriNetUnfolder]: 77332/112082 cut-off events. [2023-08-30 00:04:17,579 INFO L131 PetriNetUnfolder]: For 57282/57282 co-relation queries the response was YES. [2023-08-30 00:04:18,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332960 conditions, 112082 events. 77332/112082 cut-off events. For 57282/57282 co-relation queries the response was YES. Maximal size of possible extension queue 3022. Compared 814643 event pairs, 64960 based on Foata normal form. 12/74036 useless extension candidates. Maximal degree in co-relation 332904. Up to 111389 conditions per place. [2023-08-30 00:04:18,843 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 162 selfloop transitions, 34 changer transitions 1/197 dead transitions. [2023-08-30 00:04:18,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 197 transitions, 2033 flow [2023-08-30 00:04:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:04:18,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:04:18,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1160 transitions. [2023-08-30 00:04:18,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128113879003559 [2023-08-30 00:04:18,847 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1160 transitions. [2023-08-30 00:04:18,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1160 transitions. [2023-08-30 00:04:18,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:04:18,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1160 transitions. [2023-08-30 00:04:18,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 232.0) internal successors, (1160), 5 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:18,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:18,851 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:18,851 INFO L175 Difference]: Start difference. First operand has 133 places, 174 transitions, 1536 flow. Second operand 5 states and 1160 transitions. [2023-08-30 00:04:18,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 197 transitions, 2033 flow [2023-08-30 00:04:19,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 197 transitions, 2031 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:04:19,024 INFO L231 Difference]: Finished difference. Result has 138 places, 176 transitions, 1665 flow [2023-08-30 00:04:19,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1665, PETRI_PLACES=138, PETRI_TRANSITIONS=176} [2023-08-30 00:04:19,025 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 69 predicate places. [2023-08-30 00:04:19,025 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 176 transitions, 1665 flow [2023-08-30 00:04:19,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:19,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:04:19,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:04:19,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 00:04:19,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:04:19,233 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 00:04:19,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:04:19,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1926378656, now seen corresponding path program 1 times [2023-08-30 00:04:19,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:04:19,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339102893] [2023-08-30 00:04:19,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:04:19,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:04:19,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:04:19,234 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:04:19,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 00:04:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:04:19,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:04:19,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:04:19,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 00:04:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:04:19,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:04:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:04:20,508 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:04:20,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339102893] [2023-08-30 00:04:20,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339102893] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:04:20,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:04:20,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-30 00:04:20,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777888341] [2023-08-30 00:04:20,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:04:20,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:04:20,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:04:20,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:04:20,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:04:27,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 562 [2023-08-30 00:04:27,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 176 transitions, 1665 flow. Second operand has 8 states, 8 states have (on average 199.875) internal successors, (1599), 8 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:27,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:04:27,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 562 [2023-08-30 00:04:27,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:04:51,807 INFO L130 PetriNetUnfolder]: 73021/105971 cut-off events. [2023-08-30 00:04:51,807 INFO L131 PetriNetUnfolder]: For 61932/61932 co-relation queries the response was YES. [2023-08-30 00:04:52,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319241 conditions, 105971 events. 73021/105971 cut-off events. For 61932/61932 co-relation queries the response was YES. Maximal size of possible extension queue 2857. Compared 766147 event pairs, 61141 based on Foata normal form. 0/73505 useless extension candidates. Maximal degree in co-relation 319182. Up to 83497 conditions per place. [2023-08-30 00:04:53,336 INFO L137 encePairwiseOnDemand]: 551/562 looper letters, 190 selfloop transitions, 88 changer transitions 1/279 dead transitions. [2023-08-30 00:04:53,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 279 transitions, 2682 flow [2023-08-30 00:04:53,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:04:53,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:04:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2524 transitions. [2023-08-30 00:04:53,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37425860023724794 [2023-08-30 00:04:53,342 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2524 transitions. [2023-08-30 00:04:53,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2524 transitions. [2023-08-30 00:04:53,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:04:53,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2524 transitions. [2023-08-30 00:04:53,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 210.33333333333334) internal successors, (2524), 12 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:53,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:53,350 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:53,350 INFO L175 Difference]: Start difference. First operand has 138 places, 176 transitions, 1665 flow. Second operand 12 states and 2524 transitions. [2023-08-30 00:04:53,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 279 transitions, 2682 flow [2023-08-30 00:04:53,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 279 transitions, 2638 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 00:04:53,581 INFO L231 Difference]: Finished difference. Result has 149 places, 178 transitions, 1838 flow [2023-08-30 00:04:53,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1621, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1838, PETRI_PLACES=149, PETRI_TRANSITIONS=178} [2023-08-30 00:04:53,581 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 80 predicate places. [2023-08-30 00:04:53,581 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 178 transitions, 1838 flow [2023-08-30 00:04:53,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 199.875) internal successors, (1599), 8 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:53,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:04:53,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:04:53,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-08-30 00:04:53,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:04:53,783 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 00:04:53,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:04:53,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1926378657, now seen corresponding path program 1 times [2023-08-30 00:04:53,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:04:53,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337240577] [2023-08-30 00:04:53,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:04:53,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:04:53,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:04:53,784 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:04:53,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 00:04:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:04:53,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 00:04:53,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:04:53,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 00:04:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:04:53,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:04:53,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:04:53,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337240577] [2023-08-30 00:04:53,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337240577] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:04:53,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:04:53,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:04:53,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381231005] [2023-08-30 00:04:53,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:04:53,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:04:53,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:04:53,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:04:53,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:04:54,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 562 [2023-08-30 00:04:54,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 178 transitions, 1838 flow. Second operand has 4 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:54,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:04:54,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 562 [2023-08-30 00:04:54,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:06,230 INFO L130 PetriNetUnfolder]: 56287/82241 cut-off events. [2023-08-30 00:05:06,231 INFO L131 PetriNetUnfolder]: For 86431/86431 co-relation queries the response was YES. [2023-08-30 00:05:06,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257557 conditions, 82241 events. 56287/82241 cut-off events. For 86431/86431 co-relation queries the response was YES. Maximal size of possible extension queue 2241. Compared 575227 event pairs, 46339 based on Foata normal form. 2010/66665 useless extension candidates. Maximal degree in co-relation 257496. Up to 82017 conditions per place. [2023-08-30 00:05:07,147 INFO L137 encePairwiseOnDemand]: 558/562 looper letters, 154 selfloop transitions, 22 changer transitions 0/176 dead transitions. [2023-08-30 00:05:07,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 176 transitions, 2180 flow [2023-08-30 00:05:07,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:05:07,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:05:07,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 905 transitions. [2023-08-30 00:05:07,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025800711743772 [2023-08-30 00:05:07,150 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 905 transitions. [2023-08-30 00:05:07,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 905 transitions. [2023-08-30 00:05:07,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:07,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 905 transitions. [2023-08-30 00:05:07,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 226.25) internal successors, (905), 4 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:07,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:07,153 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:07,153 INFO L175 Difference]: Start difference. First operand has 149 places, 178 transitions, 1838 flow. Second operand 4 states and 905 transitions. [2023-08-30 00:05:07,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 176 transitions, 2180 flow [2023-08-30 00:05:07,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 176 transitions, 2011 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 00:05:07,456 INFO L231 Difference]: Finished difference. Result has 145 places, 176 transitions, 1703 flow [2023-08-30 00:05:07,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1703, PETRI_PLACES=145, PETRI_TRANSITIONS=176} [2023-08-30 00:05:07,457 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 76 predicate places. [2023-08-30 00:05:07,457 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 176 transitions, 1703 flow [2023-08-30 00:05:07,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:07,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:07,458 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:07,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-08-30 00:05:07,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:05:07,660 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 00:05:07,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:07,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1138504699, now seen corresponding path program 2 times [2023-08-30 00:05:07,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:05:07,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742040319] [2023-08-30 00:05:07,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:05:07,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:05:07,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:05:07,661 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:05:07,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 00:05:07,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:05:07,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:07,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 00:05:07,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:08,006 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:05:08,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:05:08,167 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:05:08,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:05:08,352 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 00:05:08,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 00:05:08,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 00:05:08,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:05:08,430 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 16 treesize of output 18 [2023-08-30 00:05:08,455 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 00:05:08,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 00:05:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 00:05:08,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:05:08,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:05:08,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742040319] [2023-08-30 00:05:08,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742040319] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:05:08,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:05:08,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:05:08,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028875746] [2023-08-30 00:05:08,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:08,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:05:08,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:05:08,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:05:08,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:05:12,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:05:12,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 562 [2023-08-30 00:05:12,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 176 transitions, 1703 flow. Second operand has 6 states, 6 states have (on average 200.83333333333334) internal successors, (1205), 6 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:12,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:12,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 562 [2023-08-30 00:05:12,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:14,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:05:16,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:05:18,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:05:20,582 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] [2023-08-30 00:05:28,575 INFO L130 PetriNetUnfolder]: 34201/50783 cut-off events. [2023-08-30 00:05:28,575 INFO L131 PetriNetUnfolder]: For 60912/60912 co-relation queries the response was YES. [2023-08-30 00:05:28,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138309 conditions, 50783 events. 34201/50783 cut-off events. For 60912/60912 co-relation queries the response was YES. Maximal size of possible extension queue 1336. Compared 345676 event pairs, 26881 based on Foata normal form. 3186/45833 useless extension candidates. Maximal degree in co-relation 138249. Up to 50233 conditions per place. [2023-08-30 00:05:29,062 INFO L137 encePairwiseOnDemand]: 548/562 looper letters, 125 selfloop transitions, 58 changer transitions 2/185 dead transitions. [2023-08-30 00:05:29,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 185 transitions, 2047 flow [2023-08-30 00:05:29,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:05:29,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:05:29,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1266 transitions. [2023-08-30 00:05:29,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37544483985765126 [2023-08-30 00:05:29,065 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1266 transitions. [2023-08-30 00:05:29,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1266 transitions. [2023-08-30 00:05:29,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:29,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1266 transitions. [2023-08-30 00:05:29,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:29,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:29,069 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:29,069 INFO L175 Difference]: Start difference. First operand has 145 places, 176 transitions, 1703 flow. Second operand 6 states and 1266 transitions. [2023-08-30 00:05:29,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 185 transitions, 2047 flow [2023-08-30 00:05:29,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 185 transitions, 2016 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 00:05:29,127 INFO L231 Difference]: Finished difference. Result has 138 places, 168 transitions, 1716 flow [2023-08-30 00:05:29,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1716, PETRI_PLACES=138, PETRI_TRANSITIONS=168} [2023-08-30 00:05:29,127 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 69 predicate places. [2023-08-30 00:05:29,127 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 168 transitions, 1716 flow [2023-08-30 00:05:29,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 200.83333333333334) internal successors, (1205), 6 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:29,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:29,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:29,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:29,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:05:29,330 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 00:05:29,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:29,330 INFO L85 PathProgramCache]: Analyzing trace with hash -118953814, now seen corresponding path program 1 times [2023-08-30 00:05:29,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:05:29,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287895263] [2023-08-30 00:05:29,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:29,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:05:29,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:05:29,332 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:05:29,335 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 (22)] Waiting until timeout for monitored process [2023-08-30 00:05:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:29,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:05:29,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:05:30,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:30,666 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 219 treesize of output 215 [2023-08-30 00:05:30,674 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 215 treesize of output 211 [2023-08-30 00:05:31,592 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:05:31,593 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:05:31,594 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:05:31,600 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:05:31,605 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:05:31,607 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:05:31,614 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:05:31,616 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:05:31,617 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:05:31,618 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:05:31,626 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:05:31,627 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:05:31,687 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:05:31,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 126 treesize of output 105 [2023-08-30 00:05:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:05:33,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:05:33,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287895263] [2023-08-30 00:05:33,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287895263] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:33,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:05:33,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:05:33,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248416463] [2023-08-30 00:05:33,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:33,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:05:33,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:05:33,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:05:33,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:05:40,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 562 [2023-08-30 00:05:40,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 168 transitions, 1716 flow. Second operand has 12 states, 12 states have (on average 189.5) internal successors, (2274), 12 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:40,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:40,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 562 [2023-08-30 00:05:40,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:56,645 INFO L130 PetriNetUnfolder]: 45308/67044 cut-off events. [2023-08-30 00:05:56,645 INFO L131 PetriNetUnfolder]: For 48620/48620 co-relation queries the response was YES. [2023-08-30 00:05:57,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183753 conditions, 67044 events. 45308/67044 cut-off events. For 48620/48620 co-relation queries the response was YES. Maximal size of possible extension queue 1811. Compared 472392 event pairs, 24400 based on Foata normal form. 571/56539 useless extension candidates. Maximal degree in co-relation 183695. Up to 33012 conditions per place. [2023-08-30 00:05:57,354 INFO L137 encePairwiseOnDemand]: 542/562 looper letters, 249 selfloop transitions, 77 changer transitions 13/339 dead transitions. [2023-08-30 00:05:57,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 339 transitions, 3461 flow [2023-08-30 00:05:57,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 00:05:57,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 00:05:57,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2964 transitions. [2023-08-30 00:05:57,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3516014234875445 [2023-08-30 00:05:57,359 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2964 transitions. [2023-08-30 00:05:57,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2964 transitions. [2023-08-30 00:05:57,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:57,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2964 transitions. [2023-08-30 00:05:57,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 197.6) internal successors, (2964), 15 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:57,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 562.0) internal successors, (8992), 16 states have internal predecessors, (8992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:57,367 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 562.0) internal successors, (8992), 16 states have internal predecessors, (8992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:57,367 INFO L175 Difference]: Start difference. First operand has 138 places, 168 transitions, 1716 flow. Second operand 15 states and 2964 transitions. [2023-08-30 00:05:57,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 339 transitions, 3461 flow [2023-08-30 00:05:57,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 339 transitions, 3436 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:05:57,460 INFO L231 Difference]: Finished difference. Result has 158 places, 207 transitions, 2436 flow [2023-08-30 00:05:57,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2436, PETRI_PLACES=158, PETRI_TRANSITIONS=207} [2023-08-30 00:05:57,461 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 89 predicate places. [2023-08-30 00:05:57,461 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 207 transitions, 2436 flow [2023-08-30 00:05:57,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 189.5) internal successors, (2274), 12 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:57,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:57,462 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 1, 1, 1] [2023-08-30 00:05:57,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:57,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:05:57,662 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 00:05:57,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:57,663 INFO L85 PathProgramCache]: Analyzing trace with hash 2093086189, now seen corresponding path program 1 times [2023-08-30 00:05:57,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:05:57,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350226972] [2023-08-30 00:05:57,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:57,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:05:57,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:05:57,664 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:05:57,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 00:05:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:57,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 00:05:57,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:57,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 00:05:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:58,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:06:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:04,091 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:06:04,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350226972] [2023-08-30 00:06:04,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350226972] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:06:04,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:06:04,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2023-08-30 00:06:04,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808865351] [2023-08-30 00:06:04,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:06:04,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 00:06:04,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:06:04,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 00:06:04,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2023-08-30 00:06:52,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 562 [2023-08-30 00:06:52,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 207 transitions, 2436 flow. Second operand has 30 states, 30 states have (on average 202.03333333333333) internal successors, (6061), 30 states have internal predecessors, (6061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:52,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:06:52,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 562 [2023-08-30 00:06:52,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:07:05,032 WARN L222 SmtUtils]: Spent 7.44s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:07:07,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:09,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:11,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:13,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:15,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:17,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:19,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:21,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:23,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:25,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:27,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:29,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:31,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:39,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:41,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:43,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:45,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:47,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:49,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:51,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:53,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:55,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:57,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:59,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:08:00,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:08:02,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:08:08,922 WARN L222 SmtUtils]: Spent 5.41s on a formula simplification that was a NOOP. DAG size: 135 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:08:49,302 INFO L130 PetriNetUnfolder]: 57547/85070 cut-off events. [2023-08-30 00:08:49,302 INFO L131 PetriNetUnfolder]: For 152924/152924 co-relation queries the response was YES. [2023-08-30 00:08:49,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294811 conditions, 85070 events. 57547/85070 cut-off events. For 152924/152924 co-relation queries the response was YES. Maximal size of possible extension queue 1986. Compared 608613 event pairs, 41484 based on Foata normal form. 72/75542 useless extension candidates. Maximal degree in co-relation 294745. Up to 17600 conditions per place. [2023-08-30 00:08:50,111 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 804 selfloop transitions, 181 changer transitions 2/987 dead transitions. [2023-08-30 00:08:50,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 987 transitions, 9845 flow [2023-08-30 00:08:50,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 00:08:50,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 00:08:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6624 transitions. [2023-08-30 00:08:50,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39288256227758006 [2023-08-30 00:08:50,121 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6624 transitions. [2023-08-30 00:08:50,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6624 transitions. [2023-08-30 00:08:50,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:08:50,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6624 transitions. [2023-08-30 00:08:50,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 220.8) internal successors, (6624), 30 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:50,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 562.0) internal successors, (17422), 31 states have internal predecessors, (17422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:50,141 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 562.0) internal successors, (17422), 31 states have internal predecessors, (17422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:50,142 INFO L175 Difference]: Start difference. First operand has 158 places, 207 transitions, 2436 flow. Second operand 30 states and 6624 transitions. [2023-08-30 00:08:50,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 987 transitions, 9845 flow [2023-08-30 00:08:50,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 987 transitions, 9630 flow, removed 93 selfloop flow, removed 3 redundant places. [2023-08-30 00:08:50,457 INFO L231 Difference]: Finished difference. Result has 200 places, 278 transitions, 4040 flow [2023-08-30 00:08:50,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=2373, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4040, PETRI_PLACES=200, PETRI_TRANSITIONS=278} [2023-08-30 00:08:50,458 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 131 predicate places. [2023-08-30 00:08:50,458 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 278 transitions, 4040 flow [2023-08-30 00:08:50,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 202.03333333333333) internal successors, (6061), 30 states have internal predecessors, (6061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:50,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:08:50,459 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:08:50,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 00:08:50,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:08:50,660 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 00:08:50,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:08:50,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1583949800, now seen corresponding path program 2 times [2023-08-30 00:08:50,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:08:50,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140360881] [2023-08-30 00:08:50,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:08:50,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:08:50,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:08:50,662 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:08:50,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 00:08:50,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:08:50,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:08:50,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:08:50,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:08:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 00:08:51,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:08:51,301 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:08:51,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140360881] [2023-08-30 00:08:51,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140360881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:08:51,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:08:51,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:08:51,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118778671] [2023-08-30 00:08:51,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:08:51,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:08:51,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:08:51,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:08:51,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:08:52,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 562 [2023-08-30 00:08:52,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 278 transitions, 4040 flow. Second operand has 5 states, 5 states have (on average 214.0) internal successors, (1070), 5 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:52,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:08:52,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 562 [2023-08-30 00:08:52,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:08:54,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:08:56,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:09:12,283 INFO L130 PetriNetUnfolder]: 57631/85274 cut-off events. [2023-08-30 00:09:12,283 INFO L131 PetriNetUnfolder]: For 150495/150495 co-relation queries the response was YES. [2023-08-30 00:09:13,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295213 conditions, 85274 events. 57631/85274 cut-off events. For 150495/150495 co-relation queries the response was YES. Maximal size of possible extension queue 1940. Compared 604630 event pairs, 29781 based on Foata normal form. 216/75890 useless extension candidates. Maximal degree in co-relation 295130. Up to 77494 conditions per place. [2023-08-30 00:09:13,505 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 266 selfloop transitions, 9 changer transitions 25/300 dead transitions. [2023-08-30 00:09:13,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 300 transitions, 4717 flow [2023-08-30 00:09:13,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:09:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:09:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1122 transitions. [2023-08-30 00:09:13,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.399288256227758 [2023-08-30 00:09:13,509 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1122 transitions. [2023-08-30 00:09:13,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1122 transitions. [2023-08-30 00:09:13,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:09:13,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1122 transitions. [2023-08-30 00:09:13,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 224.4) internal successors, (1122), 5 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:13,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:13,512 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:13,512 INFO L175 Difference]: Start difference. First operand has 200 places, 278 transitions, 4040 flow. Second operand 5 states and 1122 transitions. [2023-08-30 00:09:13,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 300 transitions, 4717 flow [2023-08-30 00:09:13,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 300 transitions, 4405 flow, removed 40 selfloop flow, removed 12 redundant places. [2023-08-30 00:09:13,877 INFO L231 Difference]: Finished difference. Result has 195 places, 269 transitions, 3619 flow [2023-08-30 00:09:13,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=3728, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3619, PETRI_PLACES=195, PETRI_TRANSITIONS=269} [2023-08-30 00:09:13,878 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 126 predicate places. [2023-08-30 00:09:13,878 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 269 transitions, 3619 flow [2023-08-30 00:09:13,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 214.0) internal successors, (1070), 5 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:13,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:09:13,878 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:09:13,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 00:09:14,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:09:14,079 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 00:09:14,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:09:14,080 INFO L85 PathProgramCache]: Analyzing trace with hash 748916070, now seen corresponding path program 2 times [2023-08-30 00:09:14,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:09:14,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722032019] [2023-08-30 00:09:14,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:09:14,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:09:14,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:09:14,082 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:09:14,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 00:09:14,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:09:14,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:09:14,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:09:14,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:09:14,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 00:09:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 00:09:14,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:09:14,403 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:09:14,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722032019] [2023-08-30 00:09:14,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722032019] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:09:14,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:09:14,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:09:14,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819563076] [2023-08-30 00:09:14,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:09:14,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:09:14,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:09:14,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:09:14,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:09:14,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 562 [2023-08-30 00:09:14,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 269 transitions, 3619 flow. Second operand has 4 states, 4 states have (on average 218.25) internal successors, (873), 4 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:14,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:09:14,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 562 [2023-08-30 00:09:14,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand