./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:51:07,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:51:07,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:51:07,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:51:07,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:51:07,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:51:07,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:51:07,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:51:07,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:51:07,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:51:07,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:51:07,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:51:07,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:51:07,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:51:07,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:51:07,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:51:07,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:51:07,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:51:07,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:51:07,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:51:07,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:51:08,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:51:08,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:51:08,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:51:08,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:51:08,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:51:08,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:51:08,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:51:08,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:51:08,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:51:08,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:51:08,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:51:08,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:51:08,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:51:08,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:51:08,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:51:08,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:51:08,019 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:51:08,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:51:08,020 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:51:08,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:51:08,021 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:51:08,047 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:51:08,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:51:08,048 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:51:08,048 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:51:08,048 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:51:08,049 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:51:08,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:51:08,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:51:08,049 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:51:08,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:51:08,050 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:51:08,050 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:51:08,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:51:08,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:51:08,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:51:08,051 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:51:08,051 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:51:08,051 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:51:08,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:51:08,051 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:51:08,051 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:51:08,051 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:51:08,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:51:08,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:51:08,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:51:08,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:51:08,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:51:08,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:51:08,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:51:08,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:51:08,053 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:51:08,053 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:51:08,053 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:51:08,053 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:51:08,053 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:51:08,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:51:08,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:51:08,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:51:08,304 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:51:08,305 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:51:08,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2023-08-30 04:51:09,391 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:51:09,546 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:51:09,546 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2023-08-30 04:51:09,554 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f6a7e22a/d45284cec3194156b35452a3ed0c4fd9/FLAGc4416294e [2023-08-30 04:51:09,569 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f6a7e22a/d45284cec3194156b35452a3ed0c4fd9 [2023-08-30 04:51:09,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:51:09,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:51:09,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:51:09,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:51:09,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:51:09,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:51:09" (1/1) ... [2023-08-30 04:51:09,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a6a8410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:09, skipping insertion in model container [2023-08-30 04:51:09,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:51:09" (1/1) ... [2023-08-30 04:51:09,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:51:09,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:51:09,718 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c[2781,2794] [2023-08-30 04:51:09,725 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:51:09,735 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 04:51:09,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@17a9cd96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:09, skipping insertion in model container [2023-08-30 04:51:09,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:51:09,737 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 04:51:09,738 INFO L158 Benchmark]: Toolchain (without parser) took 166.03ms. Allocated memory is still 62.9MB. Free memory was 41.7MB in the beginning and 31.7MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 04:51:09,739 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 62.9MB. Free memory was 40.1MB in the beginning and 40.1MB in the end (delta: 32.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 04:51:09,740 INFO L158 Benchmark]: CACSL2BoogieTranslator took 163.55ms. Allocated memory is still 62.9MB. Free memory was 41.4MB in the beginning and 31.7MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 04:51:09,741 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 62.9MB. Free memory was 40.1MB in the beginning and 40.1MB in the end (delta: 32.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 163.55ms. Allocated memory is still 62.9MB. Free memory was 41.4MB in the beginning and 31.7MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:51:11,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:51:11,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:51:11,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:51:11,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:51:11,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:51:11,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:51:11,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:51:11,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:51:11,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:51:11,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:51:11,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:51:11,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:51:11,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:51:11,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:51:11,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:51:11,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:51:11,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:51:11,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:51:11,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:51:11,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:51:11,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:51:11,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:51:11,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:51:11,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:51:11,170 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:51:11,170 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:51:11,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:51:11,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:51:11,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:51:11,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:51:11,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:51:11,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:51:11,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:51:11,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:51:11,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:51:11,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:51:11,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:51:11,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:51:11,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:51:11,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:51:11,180 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 04:51:11,207 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:51:11,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:51:11,208 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:51:11,208 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:51:11,209 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:51:11,209 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:51:11,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:51:11,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:51:11,210 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:51:11,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:51:11,211 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:51:11,211 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:51:11,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:51:11,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:51:11,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:51:11,211 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:51:11,212 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:51:11,212 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:51:11,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:51:11,212 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:51:11,212 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 04:51:11,212 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 04:51:11,212 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:51:11,213 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:51:11,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:51:11,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:51:11,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:51:11,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:51:11,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:51:11,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:51:11,214 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 04:51:11,214 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 04:51:11,214 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:51:11,214 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:51:11,214 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:51:11,214 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 04:51:11,215 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:51:11,215 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:51:11,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:51:11,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:51:11,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:51:11,464 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:51:11,464 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:51:11,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2023-08-30 04:51:12,374 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:51:12,509 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:51:12,510 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2023-08-30 04:51:12,515 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da63eeed3/c6335964f35e484dba42b24cddb4884a/FLAG881e351a3 [2023-08-30 04:51:12,527 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da63eeed3/c6335964f35e484dba42b24cddb4884a [2023-08-30 04:51:12,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:51:12,530 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:51:12,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:51:12,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:51:12,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:51:12,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:51:12" (1/1) ... [2023-08-30 04:51:12,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e644123 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:12, skipping insertion in model container [2023-08-30 04:51:12,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:51:12" (1/1) ... [2023-08-30 04:51:12,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:51:12,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:51:12,726 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c[2781,2794] [2023-08-30 04:51:12,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:51:12,748 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 04:51:12,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:51:12,778 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c[2781,2794] [2023-08-30 04:51:12,781 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:51:12,786 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:51:12,811 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c[2781,2794] [2023-08-30 04:51:12,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:51:12,829 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:51:12,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:12 WrapperNode [2023-08-30 04:51:12,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:51:12,830 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:51:12,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:51:12,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:51:12,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:12" (1/1) ... [2023-08-30 04:51:12,851 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:12" (1/1) ... [2023-08-30 04:51:12,881 INFO L138 Inliner]: procedures = 28, calls = 50, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 278 [2023-08-30 04:51:12,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:51:12,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:51:12,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:51:12,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:51:12,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:12" (1/1) ... [2023-08-30 04:51:12,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:12" (1/1) ... [2023-08-30 04:51:12,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:12" (1/1) ... [2023-08-30 04:51:12,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:12" (1/1) ... [2023-08-30 04:51:12,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:12" (1/1) ... [2023-08-30 04:51:12,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:12" (1/1) ... [2023-08-30 04:51:12,911 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:12" (1/1) ... [2023-08-30 04:51:12,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:12" (1/1) ... [2023-08-30 04:51:12,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:51:12,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:51:12,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:51:12,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:51:12,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:12" (1/1) ... [2023-08-30 04:51:12,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:51:12,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:51:12,952 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 04:51:12,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 04:51:13,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:51:13,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 04:51:13,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:51:13,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 04:51:13,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 04:51:13,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 04:51:13,004 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 04:51:13,004 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 04:51:13,004 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 04:51:13,004 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 04:51:13,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 04:51:13,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:51:13,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:51:13,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:51:13,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 04:51:13,006 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 04:51:13,113 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:51:13,130 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:51:13,740 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:51:13,746 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:51:13,746 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 04:51:13,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:51:13 BoogieIcfgContainer [2023-08-30 04:51:13,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:51:13,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:51:13,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:51:13,751 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:51:13,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:51:12" (1/3) ... [2023-08-30 04:51:13,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de20e85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:51:13, skipping insertion in model container [2023-08-30 04:51:13,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:12" (2/3) ... [2023-08-30 04:51:13,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de20e85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:51:13, skipping insertion in model container [2023-08-30 04:51:13,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:51:13" (3/3) ... [2023-08-30 04:51:13,753 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2023-08-30 04:51:13,764 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:51:13,764 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-08-30 04:51:13,765 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:51:13,872 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:51:13,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 342 places, 361 transitions, 746 flow [2023-08-30 04:51:13,991 INFO L130 PetriNetUnfolder]: 29/358 cut-off events. [2023-08-30 04:51:13,991 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 04:51:13,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 358 events. 29/358 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 778 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 266. Up to 3 conditions per place. [2023-08-30 04:51:13,998 INFO L82 GeneralOperation]: Start removeDead. Operand has 342 places, 361 transitions, 746 flow [2023-08-30 04:51:14,003 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 335 places, 354 transitions, 726 flow [2023-08-30 04:51:14,005 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:51:14,017 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 335 places, 354 transitions, 726 flow [2023-08-30 04:51:14,020 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 335 places, 354 transitions, 726 flow [2023-08-30 04:51:14,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 354 transitions, 726 flow [2023-08-30 04:51:14,074 INFO L130 PetriNetUnfolder]: 29/354 cut-off events. [2023-08-30 04:51:14,074 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 04:51:14,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 354 events. 29/354 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 781 event pairs, 0 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 266. Up to 3 conditions per place. [2023-08-30 04:51:14,082 INFO L119 LiptonReduction]: Number of co-enabled transitions 21114 [2023-08-30 04:51:45,555 INFO L134 LiptonReduction]: Checked pairs total: 32211 [2023-08-30 04:51:45,555 INFO L136 LiptonReduction]: Total number of compositions: 423 [2023-08-30 04:51:45,567 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:51:45,572 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;@1332e0a5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:51:45,572 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-08-30 04:51:45,575 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 04:51:45,575 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:51:45,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:51:45,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:51:45,576 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:51:45,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:51:45,580 INFO L85 PathProgramCache]: Analyzing trace with hash 46466, now seen corresponding path program 1 times [2023-08-30 04:51:45,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:51:45,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797125299] [2023-08-30 04:51:45,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:51:45,590 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 04:51:45,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:51:45,623 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:51:45,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 04:51:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:51:45,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:51:45,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:51:45,791 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 04:51:45,792 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 04:51:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:51:45,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:51:45,812 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:51:45,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797125299] [2023-08-30 04:51:45,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797125299] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:51:45,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:51:45,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:51:45,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047609268] [2023-08-30 04:51:45,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:51:45,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:51:45,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:51:45,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:51:45,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:51:46,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 784 [2023-08-30 04:51:46,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:51:46,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:51:46,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 784 [2023-08-30 04:51:46,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:51:48,272 INFO L130 PetriNetUnfolder]: 17182/23633 cut-off events. [2023-08-30 04:51:48,272 INFO L131 PetriNetUnfolder]: For 448/448 co-relation queries the response was YES. [2023-08-30 04:51:48,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47596 conditions, 23633 events. 17182/23633 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 1595. Compared 133713 event pairs, 14603 based on Foata normal form. 0/7805 useless extension candidates. Maximal degree in co-relation 45108. Up to 23465 conditions per place. [2023-08-30 04:51:48,400 INFO L137 encePairwiseOnDemand]: 775/784 looper letters, 69 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-08-30 04:51:48,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 300 flow [2023-08-30 04:51:48,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:51:48,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:51:48,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1035 transitions. [2023-08-30 04:51:48,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44005102040816324 [2023-08-30 04:51:48,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1035 transitions. [2023-08-30 04:51:48,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1035 transitions. [2023-08-30 04:51:48,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:51:48,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1035 transitions. [2023-08-30 04:51:48,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:51:48,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:51:48,514 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:51:48,520 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 176 flow. Second operand 3 states and 1035 transitions. [2023-08-30 04:51:48,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 300 flow [2023-08-30 04:51:48,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 288 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 04:51:48,541 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 150 flow [2023-08-30 04:51:48,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2023-08-30 04:51:48,546 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -12 predicate places. [2023-08-30 04:51:48,552 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 150 flow [2023-08-30 04:51:48,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:51:48,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:51:48,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:51:48,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 04:51:48,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:51:48,763 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:51:48,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:51:48,764 INFO L85 PathProgramCache]: Analyzing trace with hash 46467, now seen corresponding path program 1 times [2023-08-30 04:51:48,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:51:48,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2026846799] [2023-08-30 04:51:48,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:51:48,764 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 04:51:48,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:51:48,785 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:51:48,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 04:51:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:51:48,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:51:48,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:51:48,942 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 04:51:48,943 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 04:51:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:51:48,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:51:48,980 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:51:48,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2026846799] [2023-08-30 04:51:48,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2026846799] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:51:48,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:51:48,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:51:48,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662210359] [2023-08-30 04:51:48,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:51:48,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:51:48,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:51:48,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:51:48,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:51:49,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 784 [2023-08-30 04:51:49,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:51:49,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:51:49,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 784 [2023-08-30 04:51:49,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:51:53,124 INFO L130 PetriNetUnfolder]: 34363/47262 cut-off events. [2023-08-30 04:51:53,125 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-08-30 04:51:53,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94586 conditions, 47262 events. 34363/47262 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 2538. Compared 288655 event pairs, 29206 based on Foata normal form. 0/15889 useless extension candidates. Maximal degree in co-relation 94580. Up to 23466 conditions per place. [2023-08-30 04:51:53,293 INFO L137 encePairwiseOnDemand]: 775/784 looper letters, 130 selfloop transitions, 6 changer transitions 0/137 dead transitions. [2023-08-30 04:51:53,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 137 transitions, 560 flow [2023-08-30 04:51:53,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:51:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:51:53,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1096 transitions. [2023-08-30 04:51:53,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2023-08-30 04:51:53,297 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1096 transitions. [2023-08-30 04:51:53,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1096 transitions. [2023-08-30 04:51:53,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:51:53,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1096 transitions. [2023-08-30 04:51:53,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 365.3333333333333) internal successors, (1096), 3 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:51:53,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:51:53,304 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:51:53,304 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 150 flow. Second operand 3 states and 1096 transitions. [2023-08-30 04:51:53,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 137 transitions, 560 flow [2023-08-30 04:51:53,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 137 transitions, 559 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:51:53,307 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 199 flow [2023-08-30 04:51:53,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2023-08-30 04:51:53,309 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -9 predicate places. [2023-08-30 04:51:53,309 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 199 flow [2023-08-30 04:51:53,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:51:53,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:51:53,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:51:53,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 04:51:53,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:51:53,519 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:51:53,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:51:53,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1444939, now seen corresponding path program 1 times [2023-08-30 04:51:53,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:51:53,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233937668] [2023-08-30 04:51:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:51:53,521 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 04:51:53,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:51:53,526 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:51:53,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 04:51:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:51:53,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 04:51:53,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:51:53,670 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 04:51:53,670 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 04:51:53,715 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 04:51:53,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:51:53,846 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 04:51:53,846 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:51:53,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233937668] [2023-08-30 04:51:53,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233937668] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:51:53,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:51:53,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 04:51:53,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781747090] [2023-08-30 04:51:53,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:51:53,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:51:53,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:51:53,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:51:53,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:51:55,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 784 [2023-08-30 04:51:55,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 199 flow. Second operand has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:51:55,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:51:55,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 784 [2023-08-30 04:51:55,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:51:56,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:52:03,598 INFO L130 PetriNetUnfolder]: 51554/70907 cut-off events. [2023-08-30 04:52:03,598 INFO L131 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2023-08-30 04:52:03,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141947 conditions, 70907 events. 51554/70907 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 3947. Compared 458136 event pairs, 43809 based on Foata normal form. 0/23994 useless extension candidates. Maximal degree in co-relation 141938. Up to 23467 conditions per place. [2023-08-30 04:52:03,871 INFO L137 encePairwiseOnDemand]: 772/784 looper letters, 191 selfloop transitions, 27 changer transitions 0/219 dead transitions. [2023-08-30 04:52:03,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 219 transitions, 975 flow [2023-08-30 04:52:03,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:52:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:52:03,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2051 transitions. [2023-08-30 04:52:03,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43601190476190477 [2023-08-30 04:52:03,876 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2051 transitions. [2023-08-30 04:52:03,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2051 transitions. [2023-08-30 04:52:03,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:52:03,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2051 transitions. [2023-08-30 04:52:03,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 341.8333333333333) internal successors, (2051), 6 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:03,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 784.0) internal successors, (5488), 7 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:03,888 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 784.0) internal successors, (5488), 7 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:03,888 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 199 flow. Second operand 6 states and 2051 transitions. [2023-08-30 04:52:03,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 219 transitions, 975 flow [2023-08-30 04:52:03,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 219 transitions, 951 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:52:03,896 INFO L231 Difference]: Finished difference. Result has 79 places, 97 transitions, 391 flow [2023-08-30 04:52:03,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=79, PETRI_TRANSITIONS=97} [2023-08-30 04:52:03,897 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -2 predicate places. [2023-08-30 04:52:03,897 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 97 transitions, 391 flow [2023-08-30 04:52:03,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:03,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:52:03,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:52:03,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 04:52:04,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:52:04,107 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:52:04,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:52:04,107 INFO L85 PathProgramCache]: Analyzing trace with hash 44848308, now seen corresponding path program 1 times [2023-08-30 04:52:04,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:52:04,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244507779] [2023-08-30 04:52:04,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:52:04,108 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 04:52:04,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:52:04,109 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:52:04,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 04:52:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:52:04,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 04:52:04,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:52:04,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:52:04,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:52:04,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:52:04,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:52:04,310 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 04:52:04,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 04:52:04,333 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 04:52:04,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 04:52:04,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:52:04,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:52:04,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:52:04,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:52:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:52:04,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:52:04,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:52:04,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244507779] [2023-08-30 04:52:04,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244507779] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:52:04,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:52:04,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:52:04,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4129576] [2023-08-30 04:52:04,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:52:04,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:52:04,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:52:04,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:52:04,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:52:04,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 784 [2023-08-30 04:52:04,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 97 transitions, 391 flow. Second operand has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:04,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:52:04,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 784 [2023-08-30 04:52:04,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:52:09,538 INFO L130 PetriNetUnfolder]: 39519/54963 cut-off events. [2023-08-30 04:52:09,538 INFO L131 PetriNetUnfolder]: For 257/257 co-relation queries the response was YES. [2023-08-30 04:52:09,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110205 conditions, 54963 events. 39519/54963 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 2965. Compared 352493 event pairs, 33456 based on Foata normal form. 0/19634 useless extension candidates. Maximal degree in co-relation 110192. Up to 54543 conditions per place. [2023-08-30 04:52:09,743 INFO L137 encePairwiseOnDemand]: 781/784 looper letters, 91 selfloop transitions, 1 changer transitions 0/93 dead transitions. [2023-08-30 04:52:09,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 555 flow [2023-08-30 04:52:09,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:52:09,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:52:09,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1048 transitions. [2023-08-30 04:52:09,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2023-08-30 04:52:09,746 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1048 transitions. [2023-08-30 04:52:09,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1048 transitions. [2023-08-30 04:52:09,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:52:09,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1048 transitions. [2023-08-30 04:52:09,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 349.3333333333333) internal successors, (1048), 3 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:09,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:09,752 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:09,752 INFO L175 Difference]: Start difference. First operand has 79 places, 97 transitions, 391 flow. Second operand 3 states and 1048 transitions. [2023-08-30 04:52:09,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 555 flow [2023-08-30 04:52:09,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 93 transitions, 525 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 04:52:09,755 INFO L231 Difference]: Finished difference. Result has 78 places, 93 transitions, 343 flow [2023-08-30 04:52:09,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=343, PETRI_PLACES=78, PETRI_TRANSITIONS=93} [2023-08-30 04:52:09,755 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -3 predicate places. [2023-08-30 04:52:09,756 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 93 transitions, 343 flow [2023-08-30 04:52:09,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:09,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:52:09,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:52:09,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 04:52:09,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:52:09,964 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:52:09,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:52:09,964 INFO L85 PathProgramCache]: Analyzing trace with hash 44848309, now seen corresponding path program 1 times [2023-08-30 04:52:09,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:52:09,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395315048] [2023-08-30 04:52:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:52:09,965 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 04:52:09,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:52:09,966 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:52:09,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 04:52:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:52:10,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 04:52:10,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:52:10,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:52:10,121 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 04:52:10,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-30 04:52:10,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:52:10,296 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-30 04:52:10,297 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 [2023-08-30 04:52:10,572 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-08-30 04:52:10,573 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 51 treesize of output 76 [2023-08-30 04:52:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:52:10,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:52:10,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:52:10,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395315048] [2023-08-30 04:52:10,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395315048] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:52:10,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:52:10,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:52:10,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490286253] [2023-08-30 04:52:10,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:52:10,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:52:10,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:52:10,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:52:10,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:52:11,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 784 [2023-08-30 04:52:11,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 93 transitions, 343 flow. Second operand has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:11,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:52:11,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 784 [2023-08-30 04:52:11,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:52:15,088 INFO L130 PetriNetUnfolder]: 27484/39019 cut-off events. [2023-08-30 04:52:15,089 INFO L131 PetriNetUnfolder]: For 261/261 co-relation queries the response was YES. [2023-08-30 04:52:15,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78375 conditions, 39019 events. 27484/39019 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 2024. Compared 249387 event pairs, 23103 based on Foata normal form. 0/15833 useless extension candidates. Maximal degree in co-relation 78361. Up to 38683 conditions per place. [2023-08-30 04:52:15,247 INFO L137 encePairwiseOnDemand]: 781/784 looper letters, 87 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2023-08-30 04:52:15,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 89 transitions, 499 flow [2023-08-30 04:52:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:52:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:52:15,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1046 transitions. [2023-08-30 04:52:15,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4447278911564626 [2023-08-30 04:52:15,250 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1046 transitions. [2023-08-30 04:52:15,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1046 transitions. [2023-08-30 04:52:15,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:52:15,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1046 transitions. [2023-08-30 04:52:15,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:15,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:15,258 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:15,258 INFO L175 Difference]: Start difference. First operand has 78 places, 93 transitions, 343 flow. Second operand 3 states and 1046 transitions. [2023-08-30 04:52:15,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 89 transitions, 499 flow [2023-08-30 04:52:15,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 498 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:52:15,261 INFO L231 Difference]: Finished difference. Result has 77 places, 89 transitions, 324 flow [2023-08-30 04:52:15,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=77, PETRI_TRANSITIONS=89} [2023-08-30 04:52:15,263 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -4 predicate places. [2023-08-30 04:52:15,263 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 89 transitions, 324 flow [2023-08-30 04:52:15,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:15,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:52:15,264 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 04:52:15,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 04:52:15,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:52:15,471 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:52:15,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:52:15,472 INFO L85 PathProgramCache]: Analyzing trace with hash 100935555, now seen corresponding path program 2 times [2023-08-30 04:52:15,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:52:15,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829439309] [2023-08-30 04:52:15,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:52:15,474 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 04:52:15,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:52:15,475 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:52:15,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 04:52:15,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:52:15,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:52:15,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 04:52:15,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:52:15,621 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 04:52:15,621 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 04:52:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:52:15,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:52:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:52:16,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:52:16,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829439309] [2023-08-30 04:52:16,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829439309] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:52:16,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:52:16,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 04:52:16,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674293619] [2023-08-30 04:52:16,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:52:16,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:52:16,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:52:16,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:52:16,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:52:21,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 784 [2023-08-30 04:52:21,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 89 transitions, 324 flow. Second operand has 12 states, 12 states have (on average 308.0) internal successors, (3696), 12 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:21,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:52:21,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 784 [2023-08-30 04:52:21,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:52:24,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:52:26,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:52:28,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:52:29,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:52:31,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:52:33,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:52:34,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:52:36,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:52:37,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:52:39,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:52:40,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:52:42,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:52:43,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:52:45,374 WARN L539 Checker$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 04:52:47,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:52:48,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:52:49,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:53:04,672 INFO L130 PetriNetUnfolder]: 82437/117023 cut-off events. [2023-08-30 04:53:04,672 INFO L131 PetriNetUnfolder]: For 810/810 co-relation queries the response was YES. [2023-08-30 04:53:04,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234962 conditions, 117023 events. 82437/117023 cut-off events. For 810/810 co-relation queries the response was YES. Maximal size of possible extension queue 4208. Compared 822193 event pairs, 69309 based on Foata normal form. 17/48594 useless extension candidates. Maximal degree in co-relation 234947. Up to 12907 conditions per place. [2023-08-30 04:53:05,195 INFO L137 encePairwiseOnDemand]: 774/784 looper letters, 521 selfloop transitions, 51 changer transitions 0/573 dead transitions. [2023-08-30 04:53:05,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 573 transitions, 2628 flow [2023-08-30 04:53:05,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 04:53:05,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 04:53:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4273 transitions. [2023-08-30 04:53:05,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.454187925170068 [2023-08-30 04:53:05,203 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4273 transitions. [2023-08-30 04:53:05,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4273 transitions. [2023-08-30 04:53:05,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:53:05,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4273 transitions. [2023-08-30 04:53:05,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 356.0833333333333) internal successors, (4273), 12 states have internal predecessors, (4273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:05,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 784.0) internal successors, (10192), 13 states have internal predecessors, (10192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:05,220 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 784.0) internal successors, (10192), 13 states have internal predecessors, (10192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:05,220 INFO L175 Difference]: Start difference. First operand has 77 places, 89 transitions, 324 flow. Second operand 12 states and 4273 transitions. [2023-08-30 04:53:05,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 573 transitions, 2628 flow [2023-08-30 04:53:05,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 573 transitions, 2627 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:53:05,226 INFO L231 Difference]: Finished difference. Result has 94 places, 119 transitions, 701 flow [2023-08-30 04:53:05,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=701, PETRI_PLACES=94, PETRI_TRANSITIONS=119} [2023-08-30 04:53:05,229 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 13 predicate places. [2023-08-30 04:53:05,229 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 119 transitions, 701 flow [2023-08-30 04:53:05,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 308.0) internal successors, (3696), 12 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:05,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:53:05,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:53:05,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 04:53:05,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:53:05,447 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:53:05,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:53:05,448 INFO L85 PathProgramCache]: Analyzing trace with hash 149582333, now seen corresponding path program 1 times [2023-08-30 04:53:05,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:53:05,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455758206] [2023-08-30 04:53:05,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:53:05,448 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 04:53:05,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:53:05,450 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:53:05,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 04:53:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:53:05,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 04:53:05,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:53:05,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:53:05,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:53:05,628 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-08-30 04:53:05,628 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 [2023-08-30 04:53:05,645 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 [2023-08-30 04:53:05,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:53:05,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:53:05,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:53:05,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:53:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:53:05,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:53:05,761 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:53:05,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455758206] [2023-08-30 04:53:05,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455758206] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:53:05,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:53:05,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:53:05,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047914034] [2023-08-30 04:53:05,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:53:05,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:53:05,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:53:05,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:53:05,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:53:06,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 784 [2023-08-30 04:53:06,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 119 transitions, 701 flow. Second operand has 4 states, 4 states have (on average 327.5) internal successors, (1310), 4 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:06,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:53:06,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 784 [2023-08-30 04:53:06,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:53:17,180 INFO L130 PetriNetUnfolder]: 80601/114242 cut-off events. [2023-08-30 04:53:17,181 INFO L131 PetriNetUnfolder]: For 840/840 co-relation queries the response was YES. [2023-08-30 04:53:17,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229515 conditions, 114242 events. 80601/114242 cut-off events. For 840/840 co-relation queries the response was YES. Maximal size of possible extension queue 3846. Compared 800243 event pairs, 67734 based on Foata normal form. 0/46875 useless extension candidates. Maximal degree in co-relation 229492. Up to 113234 conditions per place. [2023-08-30 04:53:17,775 INFO L137 encePairwiseOnDemand]: 781/784 looper letters, 115 selfloop transitions, 1 changer transitions 0/117 dead transitions. [2023-08-30 04:53:17,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 117 transitions, 929 flow [2023-08-30 04:53:17,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:53:17,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:53:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1044 transitions. [2023-08-30 04:53:17,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44387755102040816 [2023-08-30 04:53:17,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1044 transitions. [2023-08-30 04:53:17,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1044 transitions. [2023-08-30 04:53:17,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:53:17,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1044 transitions. [2023-08-30 04:53:17,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:17,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:17,794 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:17,794 INFO L175 Difference]: Start difference. First operand has 94 places, 119 transitions, 701 flow. Second operand 3 states and 1044 transitions. [2023-08-30 04:53:17,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 117 transitions, 929 flow [2023-08-30 04:53:17,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 117 transitions, 834 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-08-30 04:53:17,797 INFO L231 Difference]: Finished difference. Result has 90 places, 117 transitions, 604 flow [2023-08-30 04:53:17,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=604, PETRI_PLACES=90, PETRI_TRANSITIONS=117} [2023-08-30 04:53:17,798 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 9 predicate places. [2023-08-30 04:53:17,798 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 117 transitions, 604 flow [2023-08-30 04:53:17,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 327.5) internal successors, (1310), 4 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:17,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:53:17,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:53:17,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 04:53:18,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:53:18,005 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:53:18,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:53:18,005 INFO L85 PathProgramCache]: Analyzing trace with hash 149582335, now seen corresponding path program 1 times [2023-08-30 04:53:18,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:53:18,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329433087] [2023-08-30 04:53:18,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:53:18,006 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 04:53:18,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:53:18,012 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:53:18,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 04:53:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:53:18,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 04:53:18,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:53:18,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:53:18,150 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 04:53:18,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-30 04:53:18,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:53:18,279 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-08-30 04:53:18,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2023-08-30 04:53:18,389 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-30 04:53:18,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 04:53:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:53:18,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:53:18,624 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:53:18,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329433087] [2023-08-30 04:53:18,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329433087] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:53:18,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:53:18,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:53:18,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311645305] [2023-08-30 04:53:18,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:53:18,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:53:18,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:53:18,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:53:18,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:53:19,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 784 [2023-08-30 04:53:19,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 117 transitions, 604 flow. Second operand has 4 states, 4 states have (on average 327.5) internal successors, (1310), 4 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:19,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:53:19,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 784 [2023-08-30 04:53:19,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:53:29,035 INFO L130 PetriNetUnfolder]: 78765/111461 cut-off events. [2023-08-30 04:53:29,036 INFO L131 PetriNetUnfolder]: For 862/862 co-relation queries the response was YES. [2023-08-30 04:53:29,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223896 conditions, 111461 events. 78765/111461 cut-off events. For 862/862 co-relation queries the response was YES. Maximal size of possible extension queue 3730. Compared 774575 event pairs, 66159 based on Foata normal form. 0/46283 useless extension candidates. Maximal degree in co-relation 223872. Up to 110453 conditions per place. [2023-08-30 04:53:29,707 INFO L137 encePairwiseOnDemand]: 781/784 looper letters, 113 selfloop transitions, 1 changer transitions 0/115 dead transitions. [2023-08-30 04:53:29,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 115 transitions, 828 flow [2023-08-30 04:53:29,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:53:29,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:53:29,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1042 transitions. [2023-08-30 04:53:29,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44302721088435376 [2023-08-30 04:53:29,710 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1042 transitions. [2023-08-30 04:53:29,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1042 transitions. [2023-08-30 04:53:29,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:53:29,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1042 transitions. [2023-08-30 04:53:29,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 347.3333333333333) internal successors, (1042), 3 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:29,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:29,714 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:29,714 INFO L175 Difference]: Start difference. First operand has 90 places, 117 transitions, 604 flow. Second operand 3 states and 1042 transitions. [2023-08-30 04:53:29,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 115 transitions, 828 flow [2023-08-30 04:53:29,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 115 transitions, 827 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:53:29,718 INFO L231 Difference]: Finished difference. Result has 89 places, 115 transitions, 601 flow [2023-08-30 04:53:29,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=601, PETRI_PLACES=89, PETRI_TRANSITIONS=115} [2023-08-30 04:53:29,719 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 8 predicate places. [2023-08-30 04:53:29,719 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 115 transitions, 601 flow [2023-08-30 04:53:29,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 327.5) internal successors, (1310), 4 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:29,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:53:29,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:53:29,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 04:53:29,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:53:29,925 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:53:29,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:53:29,926 INFO L85 PathProgramCache]: Analyzing trace with hash 342082193, now seen corresponding path program 1 times [2023-08-30 04:53:29,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:53:29,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129506886] [2023-08-30 04:53:29,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:53:29,926 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 04:53:29,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:53:29,931 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:53:29,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 04:53:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:53:30,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:53:30,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:53:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:53:30,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:53:30,042 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:53:30,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129506886] [2023-08-30 04:53:30,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129506886] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:53:30,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:53:30,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:53:30,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679741110] [2023-08-30 04:53:30,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:53:30,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:53:30,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:53:30,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:53:30,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:53:30,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 784 [2023-08-30 04:53:30,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 115 transitions, 601 flow. Second operand has 5 states, 5 states have (on average 318.4) internal successors, (1592), 5 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:30,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:53:30,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 784 [2023-08-30 04:53:30,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:53:43,685 INFO L130 PetriNetUnfolder]: 95949/137029 cut-off events. [2023-08-30 04:53:43,685 INFO L131 PetriNetUnfolder]: For 938/938 co-relation queries the response was YES. [2023-08-30 04:53:44,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275469 conditions, 137029 events. 95949/137029 cut-off events. For 938/938 co-relation queries the response was YES. Maximal size of possible extension queue 4562. Compared 1000713 event pairs, 68697 based on Foata normal form. 0/61825 useless extension candidates. Maximal degree in co-relation 275444. Up to 110452 conditions per place. [2023-08-30 04:53:44,629 INFO L137 encePairwiseOnDemand]: 775/784 looper letters, 215 selfloop transitions, 4 changer transitions 0/220 dead transitions. [2023-08-30 04:53:44,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 220 transitions, 1478 flow [2023-08-30 04:53:44,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:53:44,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:53:44,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1727 transitions. [2023-08-30 04:53:44,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4405612244897959 [2023-08-30 04:53:44,634 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1727 transitions. [2023-08-30 04:53:44,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1727 transitions. [2023-08-30 04:53:44,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:53:44,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1727 transitions. [2023-08-30 04:53:44,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 345.4) internal successors, (1727), 5 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:44,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 784.0) internal successors, (4704), 6 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:44,674 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 784.0) internal successors, (4704), 6 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:44,674 INFO L175 Difference]: Start difference. First operand has 89 places, 115 transitions, 601 flow. Second operand 5 states and 1727 transitions. [2023-08-30 04:53:44,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 220 transitions, 1478 flow [2023-08-30 04:53:44,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 220 transitions, 1477 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:53:44,680 INFO L231 Difference]: Finished difference. Result has 94 places, 116 transitions, 625 flow [2023-08-30 04:53:44,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=625, PETRI_PLACES=94, PETRI_TRANSITIONS=116} [2023-08-30 04:53:44,682 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 13 predicate places. [2023-08-30 04:53:44,682 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 116 transitions, 625 flow [2023-08-30 04:53:44,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.4) internal successors, (1592), 5 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:44,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:53:44,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:53:44,693 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 (10)] Ended with exit code 0 [2023-08-30 04:53:44,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:53:44,894 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:53:44,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:53:44,894 INFO L85 PathProgramCache]: Analyzing trace with hash -276993847, now seen corresponding path program 1 times [2023-08-30 04:53:44,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:53:44,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719587068] [2023-08-30 04:53:44,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:53:44,895 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 04:53:44,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:53:44,896 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:53:44,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 04:53:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:53:44,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:53:44,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:53:45,031 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 04:53:45,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:53:45,031 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:53:45,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719587068] [2023-08-30 04:53:45,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719587068] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:53:45,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:53:45,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:53:45,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661221148] [2023-08-30 04:53:45,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:53:45,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:53:45,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:53:45,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:53:45,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:53:45,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 784 [2023-08-30 04:53:45,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 116 transitions, 625 flow. Second operand has 5 states, 5 states have (on average 318.6) internal successors, (1593), 5 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:45,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:53:45,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 784 [2023-08-30 04:53:45,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:54:03,527 INFO L130 PetriNetUnfolder]: 130295/188263 cut-off events. [2023-08-30 04:54:03,527 INFO L131 PetriNetUnfolder]: For 20803/20803 co-relation queries the response was YES. [2023-08-30 04:54:04,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401902 conditions, 188263 events. 130295/188263 cut-off events. For 20803/20803 co-relation queries the response was YES. Maximal size of possible extension queue 6213. Compared 1470330 event pairs, 86211 based on Foata normal form. 2124/94825 useless extension candidates. Maximal degree in co-relation 401874. Up to 135937 conditions per place. [2023-08-30 04:54:04,802 INFO L137 encePairwiseOnDemand]: 775/784 looper letters, 183 selfloop transitions, 15 changer transitions 0/199 dead transitions. [2023-08-30 04:54:04,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 199 transitions, 1290 flow [2023-08-30 04:54:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:54:04,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:54:04,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1724 transitions. [2023-08-30 04:54:04,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43979591836734694 [2023-08-30 04:54:04,806 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1724 transitions. [2023-08-30 04:54:04,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1724 transitions. [2023-08-30 04:54:04,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:54:04,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1724 transitions. [2023-08-30 04:54:04,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 344.8) internal successors, (1724), 5 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:04,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 784.0) internal successors, (4704), 6 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:04,812 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 784.0) internal successors, (4704), 6 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:04,812 INFO L175 Difference]: Start difference. First operand has 94 places, 116 transitions, 625 flow. Second operand 5 states and 1724 transitions. [2023-08-30 04:54:04,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 199 transitions, 1290 flow [2023-08-30 04:54:04,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 199 transitions, 1284 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 04:54:04,901 INFO L231 Difference]: Finished difference. Result has 99 places, 118 transitions, 678 flow [2023-08-30 04:54:04,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=678, PETRI_PLACES=99, PETRI_TRANSITIONS=118} [2023-08-30 04:54:04,901 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 18 predicate places. [2023-08-30 04:54:04,901 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 118 transitions, 678 flow [2023-08-30 04:54:04,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.6) internal successors, (1593), 5 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:04,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:54:04,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:54:04,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 04:54:05,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:54:05,115 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:54:05,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:54:05,115 INFO L85 PathProgramCache]: Analyzing trace with hash 2014734433, now seen corresponding path program 1 times [2023-08-30 04:54:05,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:54:05,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425987548] [2023-08-30 04:54:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:54:05,116 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 04:54:05,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:54:05,117 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:54:05,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 04:54:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:54:05,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 04:54:05,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:54:05,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:54:05,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:54:05,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:54:05,288 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:54:05,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 04:54:05,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:54:05,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 04:54:05,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:54:05,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:54:05,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:54:05,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:54:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:54:05,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:54:05,391 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:54:05,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425987548] [2023-08-30 04:54:05,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425987548] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:54:05,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:54:05,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:54:05,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715218945] [2023-08-30 04:54:05,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:54:05,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:54:05,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:54:05,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:54:05,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:54:05,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 784 [2023-08-30 04:54:05,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 118 transitions, 678 flow. Second operand has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:05,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:54:05,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 784 [2023-08-30 04:54:05,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:54:22,535 INFO L130 PetriNetUnfolder]: 124688/179605 cut-off events. [2023-08-30 04:54:22,535 INFO L131 PetriNetUnfolder]: For 59302/59302 co-relation queries the response was YES. [2023-08-30 04:54:23,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405498 conditions, 179605 events. 124688/179605 cut-off events. For 59302/59302 co-relation queries the response was YES. Maximal size of possible extension queue 5953. Compared 1369239 event pairs, 106164 based on Foata normal form. 0/88273 useless extension candidates. Maximal degree in co-relation 405468. Up to 178345 conditions per place. [2023-08-30 04:54:23,929 INFO L137 encePairwiseOnDemand]: 781/784 looper letters, 114 selfloop transitions, 1 changer transitions 0/116 dead transitions. [2023-08-30 04:54:23,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 116 transitions, 904 flow [2023-08-30 04:54:23,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:54:23,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:54:23,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1040 transitions. [2023-08-30 04:54:23,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2023-08-30 04:54:23,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1040 transitions. [2023-08-30 04:54:23,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1040 transitions. [2023-08-30 04:54:23,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:54:23,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1040 transitions. [2023-08-30 04:54:23,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 346.6666666666667) internal successors, (1040), 3 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:23,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:23,935 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:23,935 INFO L175 Difference]: Start difference. First operand has 99 places, 118 transitions, 678 flow. Second operand 3 states and 1040 transitions. [2023-08-30 04:54:23,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 116 transitions, 904 flow [2023-08-30 04:54:24,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 116 transitions, 888 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 04:54:24,120 INFO L231 Difference]: Finished difference. Result has 98 places, 116 transitions, 660 flow [2023-08-30 04:54:24,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=660, PETRI_PLACES=98, PETRI_TRANSITIONS=116} [2023-08-30 04:54:24,121 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 17 predicate places. [2023-08-30 04:54:24,121 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 116 transitions, 660 flow [2023-08-30 04:54:24,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:24,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:54:24,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:54:24,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 04:54:24,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:54:24,331 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:54:24,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:54:24,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2014734431, now seen corresponding path program 1 times [2023-08-30 04:54:24,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:54:24,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698066353] [2023-08-30 04:54:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:54:24,333 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 04:54:24,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:54:24,334 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:54:24,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 04:54:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:54:24,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 04:54:24,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:54:24,496 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 04:54:24,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-30 04:54:24,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:54:24,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 04:54:24,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:54:24,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 04:54:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:54:24,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:54:24,622 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:54:24,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698066353] [2023-08-30 04:54:24,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698066353] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:54:24,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:54:24,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:54:24,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495675356] [2023-08-30 04:54:24,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:54:24,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:54:24,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:54:24,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:54:24,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:54:25,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 784 [2023-08-30 04:54:25,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 116 transitions, 660 flow. Second operand has 5 states, 5 states have (on average 321.6) internal successors, (1608), 5 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:25,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:54:25,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 784 [2023-08-30 04:54:25,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:54:41,764 INFO L130 PetriNetUnfolder]: 119081/170875 cut-off events. [2023-08-30 04:54:41,764 INFO L131 PetriNetUnfolder]: For 56017/56017 co-relation queries the response was YES.