./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations 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-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:51:39,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:51:39,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:51:39,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:51:39,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:51:39,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:51:39,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:51:39,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:51:39,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:51:39,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:51:39,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:51:39,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:51:39,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:51:39,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:51:39,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:51:39,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:51:39,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:51:39,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:51:39,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:51:39,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:51:39,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:51:39,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:51:39,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:51:39,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:51:39,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:51:39,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:51:39,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:51:39,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:51:39,243 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:51:39,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:51:39,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:51:39,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:51:39,247 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:51:39,247 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:51:39,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:51:39,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:51:39,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:51:39,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:51:39,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:51:39,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:51:39,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:51:39,256 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:51:39,289 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:51:39,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:51:39,290 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:51:39,290 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:51:39,291 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:51:39,291 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:51:39,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:51:39,292 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:51:39,292 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:51:39,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:51:39,293 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:51:39,293 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:51:39,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:51:39,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:51:39,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:51:39,294 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:51:39,294 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:51:39,294 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:51:39,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:51:39,295 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:51:39,295 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:51:39,295 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:51:39,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:51:39,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:51:39,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:51:39,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:51:39,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:51:39,296 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:51:39,297 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:51:39,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:51:39,297 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:51:39,297 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:51:39,297 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:51:39,298 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:51:39,298 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:51:39,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:51:39,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:51:39,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:51:39,622 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:51:39,622 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:51:39,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2023-08-30 04:51:40,768 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:51:40,955 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:51:40,956 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2023-08-30 04:51:40,968 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d51d340b/80a09c4e6cec454faf62a025fbc94fb5/FLAG6f006f9eb [2023-08-30 04:51:40,981 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d51d340b/80a09c4e6cec454faf62a025fbc94fb5 [2023-08-30 04:51:40,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:51:40,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:51:40,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:51:40,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:51:40,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:51:40,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:51:40" (1/1) ... [2023-08-30 04:51:40,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3212aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:40, skipping insertion in model container [2023-08-30 04:51:40,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:51:40" (1/1) ... [2023-08-30 04:51:40,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:51:41,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:51:41,138 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c[2482,2495] [2023-08-30 04:51:41,148 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:51:41,158 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 04:51:41,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@46e830d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:41, skipping insertion in model container [2023-08-30 04:51:41,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:51:41,161 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 04:51:41,163 INFO L158 Benchmark]: Toolchain (without parser) took 178.57ms. Allocated memory is still 73.4MB. Free memory was 54.5MB in the beginning and 44.2MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 04:51:41,164 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 60.8MB. Free memory is still 39.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 04:51:41,164 INFO L158 Benchmark]: CACSL2BoogieTranslator took 176.86ms. Allocated memory is still 73.4MB. Free memory was 54.5MB in the beginning and 44.2MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 04:51:41,166 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 60.8MB. Free memory is still 39.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 176.86ms. Allocated memory is still 73.4MB. Free memory was 54.5MB in the beginning and 44.2MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:51:42,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:51:42,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:51:42,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:51:42,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:51:42,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:51:42,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:51:42,813 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:51:42,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:51:42,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:51:42,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:51:42,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:51:42,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:51:42,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:51:42,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:51:42,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:51:42,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:51:42,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:51:42,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:51:42,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:51:42,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:51:42,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:51:42,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:51:42,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:51:42,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:51:42,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:51:42,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:51:42,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:51:42,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:51:42,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:51:42,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:51:42,836 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:51:42,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:51:42,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:51:42,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:51:42,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:51:42,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:51:42,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:51:42,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:51:42,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:51:42,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:51:42,842 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 04:51:42,861 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:51:42,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:51:42,862 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:51:42,862 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:51:42,863 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:51:42,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:51:42,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:51:42,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:51:42,864 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:51:42,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:51:42,865 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:51:42,865 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:51:42,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:51:42,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:51:42,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:51:42,865 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:51:42,866 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:51:42,866 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:51:42,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:51:42,866 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:51:42,866 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 04:51:42,866 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 04:51:42,867 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:51:42,867 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:51:42,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:51:42,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:51:42,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:51:42,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:51:42,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:51:42,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:51:42,868 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 04:51:42,868 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 04:51:42,868 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:51:42,869 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:51:42,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:51:42,869 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 04:51:42,869 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:51:42,869 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:51:43,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:51:43,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:51:43,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:51:43,204 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:51:43,205 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:51:43,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2023-08-30 04:51:44,285 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:51:44,476 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:51:44,477 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2023-08-30 04:51:44,482 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c648b441/3161526a73fd4f50b1b29adfbd6cbf0e/FLAGdc4423da6 [2023-08-30 04:51:44,496 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c648b441/3161526a73fd4f50b1b29adfbd6cbf0e [2023-08-30 04:51:44,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:51:44,499 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:51:44,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:51:44,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:51:44,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:51:44,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:51:44" (1/1) ... [2023-08-30 04:51:44,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e8a2c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:44, skipping insertion in model container [2023-08-30 04:51:44,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:51:44" (1/1) ... [2023-08-30 04:51:44,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:51:44,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:51:44,685 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c[2482,2495] [2023-08-30 04:51:44,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:51:44,704 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 04:51:44,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:51:44,718 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-symm.wvr.c[2482,2495] [2023-08-30 04:51:44,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:51:44,726 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:51:44,743 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c[2482,2495] [2023-08-30 04:51:44,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:51:44,768 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:51:44,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:44 WrapperNode [2023-08-30 04:51:44,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:51:44,773 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:51:44,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:51:44,774 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:51:44,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:44" (1/1) ... [2023-08-30 04:51:44,802 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:44" (1/1) ... [2023-08-30 04:51:44,835 INFO L138 Inliner]: procedures = 27, calls = 39, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 196 [2023-08-30 04:51:44,835 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:51:44,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:51:44,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:51:44,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:51:44,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:44" (1/1) ... [2023-08-30 04:51:44,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:44" (1/1) ... [2023-08-30 04:51:44,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:44" (1/1) ... [2023-08-30 04:51:44,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:44" (1/1) ... [2023-08-30 04:51:44,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:44" (1/1) ... [2023-08-30 04:51:44,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:44" (1/1) ... [2023-08-30 04:51:44,892 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:44" (1/1) ... [2023-08-30 04:51:44,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:44" (1/1) ... [2023-08-30 04:51:44,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:51:44,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:51:44,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:51:44,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:51:44,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:44" (1/1) ... [2023-08-30 04:51:44,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:51:44,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:51:44,942 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 04:51:44,969 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 04:51:44,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:51:44,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 04:51:44,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:51:44,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 04:51:44,980 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 04:51:44,981 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 04:51:44,981 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 04:51:44,981 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 04:51:44,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 04:51:44,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:51:44,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:51:44,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:51:44,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 04:51:44,983 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 04:51:45,148 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:51:45,150 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:51:45,723 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:51:45,732 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:51:45,740 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 04:51:45,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:51:45 BoogieIcfgContainer [2023-08-30 04:51:45,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:51:45,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:51:45,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:51:45,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:51:45,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:51:44" (1/3) ... [2023-08-30 04:51:45,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19099152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:51:45, skipping insertion in model container [2023-08-30 04:51:45,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:44" (2/3) ... [2023-08-30 04:51:45,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19099152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:51:45, skipping insertion in model container [2023-08-30 04:51:45,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:51:45" (3/3) ... [2023-08-30 04:51:45,749 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2023-08-30 04:51:45,763 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:51:45,763 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-30 04:51:45,763 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:51:45,917 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:51:45,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 257 transitions, 530 flow [2023-08-30 04:51:46,071 INFO L130 PetriNetUnfolder]: 21/255 cut-off events. [2023-08-30 04:51:46,071 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 04:51:46,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 255 events. 21/255 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 483 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 162. Up to 3 conditions per place. [2023-08-30 04:51:46,079 INFO L82 GeneralOperation]: Start removeDead. Operand has 243 places, 257 transitions, 530 flow [2023-08-30 04:51:46,094 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 251 transitions, 514 flow [2023-08-30 04:51:46,098 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:51:46,115 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 251 transitions, 514 flow [2023-08-30 04:51:46,120 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 251 transitions, 514 flow [2023-08-30 04:51:46,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 251 transitions, 514 flow [2023-08-30 04:51:46,172 INFO L130 PetriNetUnfolder]: 21/251 cut-off events. [2023-08-30 04:51:46,172 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 04:51:46,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 251 events. 21/251 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 479 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 162. Up to 3 conditions per place. [2023-08-30 04:51:46,181 INFO L119 LiptonReduction]: Number of co-enabled transitions 7548 [2023-08-30 04:52:08,800 INFO L134 LiptonReduction]: Checked pairs total: 10913 [2023-08-30 04:52:08,800 INFO L136 LiptonReduction]: Total number of compositions: 306 [2023-08-30 04:52:08,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:52:08,817 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;@311099e3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:52:08,818 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-08-30 04:52:08,819 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 04:52:08,820 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:52:08,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:52:08,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:52:08,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:52:08,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:52:08,824 INFO L85 PathProgramCache]: Analyzing trace with hash 33261, now seen corresponding path program 1 times [2023-08-30 04:52:08,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:52:08,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577734589] [2023-08-30 04:52:08,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:52:08,835 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 04:52:08,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:52:08,840 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 04:52:08,845 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 04:52:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:52:08,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:52:08,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:52:09,012 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:52:09,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:52:09,050 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 04:52:09,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:52:09,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:52:09,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577734589] [2023-08-30 04:52:09,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577734589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:52:09,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:52:09,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:52:09,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288786991] [2023-08-30 04:52:09,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:52:09,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:52:09,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:52:09,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:52:09,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:52:09,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 563 [2023-08-30 04:52:09,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:09,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:52:09,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 563 [2023-08-30 04:52:09,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:52:09,601 INFO L130 PetriNetUnfolder]: 805/1290 cut-off events. [2023-08-30 04:52:09,601 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-30 04:52:09,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2622 conditions, 1290 events. 805/1290 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 6156 event pairs, 679 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 2472. Up to 1290 conditions per place. [2023-08-30 04:52:09,608 INFO L137 encePairwiseOnDemand]: 555/563 looper letters, 44 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-30 04:52:09,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 45 transitions, 192 flow [2023-08-30 04:52:09,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:52:09,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:52:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 733 transitions. [2023-08-30 04:52:09,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339846062759029 [2023-08-30 04:52:09,623 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 733 transitions. [2023-08-30 04:52:09,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 733 transitions. [2023-08-30 04:52:09,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:52:09,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 733 transitions. [2023-08-30 04:52:09,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:09,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:09,639 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:09,640 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 116 flow. Second operand 3 states and 733 transitions. [2023-08-30 04:52:09,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 45 transitions, 192 flow [2023-08-30 04:52:09,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 184 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 04:52:09,656 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 96 flow [2023-08-30 04:52:09,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-30 04:52:09,660 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-08-30 04:52:09,660 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 96 flow [2023-08-30 04:52:09,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:09,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:52:09,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:52:09,676 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 04:52:09,870 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 04:52:09,871 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:52:09,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:52:09,872 INFO L85 PathProgramCache]: Analyzing trace with hash 33262, now seen corresponding path program 1 times [2023-08-30 04:52:09,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:52:09,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252103925] [2023-08-30 04:52:09,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:52:09,872 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 04:52:09,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:52:09,874 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 04:52:09,876 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 04:52:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:52:09,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:52:09,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:52:09,997 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 04:52:09,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 04:52:10,017 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 04:52:10,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:52:10,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:52:10,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252103925] [2023-08-30 04:52:10,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252103925] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:52:10,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:52:10,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:52:10,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137357883] [2023-08-30 04:52:10,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:52:10,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:52:10,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:52:10,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:52:10,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:52:10,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 563 [2023-08-30 04:52:10,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:10,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:52:10,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 563 [2023-08-30 04:52:10,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:52:10,945 INFO L130 PetriNetUnfolder]: 1609/2577 cut-off events. [2023-08-30 04:52:10,945 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 04:52:10,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5188 conditions, 2577 events. 1609/2577 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 13992 event pairs, 1358 based on Foata normal form. 0/851 useless extension candidates. Maximal degree in co-relation 5182. Up to 1291 conditions per place. [2023-08-30 04:52:10,957 INFO L137 encePairwiseOnDemand]: 557/563 looper letters, 83 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-08-30 04:52:10,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 87 transitions, 358 flow [2023-08-30 04:52:10,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:52:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:52:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 770 transitions. [2023-08-30 04:52:10,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45589105979869743 [2023-08-30 04:52:10,960 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 770 transitions. [2023-08-30 04:52:10,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 770 transitions. [2023-08-30 04:52:10,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:52:10,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 770 transitions. [2023-08-30 04:52:10,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:10,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:10,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:10,966 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 96 flow. Second operand 3 states and 770 transitions. [2023-08-30 04:52:10,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 87 transitions, 358 flow [2023-08-30 04:52:10,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 87 transitions, 357 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:52:10,969 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 127 flow [2023-08-30 04:52:10,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-08-30 04:52:10,970 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -6 predicate places. [2023-08-30 04:52:10,970 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 127 flow [2023-08-30 04:52:10,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:10,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:52:10,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:52:10,983 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 (3)] Ended with exit code 0 [2023-08-30 04:52:11,179 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 04:52:11,180 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:52:11,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:52:11,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1035598, now seen corresponding path program 1 times [2023-08-30 04:52:11,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:52:11,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235972675] [2023-08-30 04:52:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:52:11,182 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 04:52:11,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:52:11,183 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 04:52:11,191 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 04:52:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:52:11,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:52:11,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:52:11,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:52:11,300 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-08-30 04:52:11,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-30 04:52:11,352 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 04:52:11,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 04:52:11,372 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 04:52:11,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:52:11,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:52:11,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235972675] [2023-08-30 04:52:11,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235972675] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:52:11,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:52:11,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:52:11,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693124068] [2023-08-30 04:52:11,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:52:11,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:52:11,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:52:11,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:52:11,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:52:11,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 563 [2023-08-30 04:52:11,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:11,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:52:11,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 563 [2023-08-30 04:52:11,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:52:12,009 INFO L130 PetriNetUnfolder]: 1203/1973 cut-off events. [2023-08-30 04:52:12,009 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 04:52:12,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3994 conditions, 1973 events. 1203/1973 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 10465 event pairs, 1008 based on Foata normal form. 0/729 useless extension candidates. Maximal degree in co-relation 3985. Up to 1973 conditions per place. [2023-08-30 04:52:12,018 INFO L137 encePairwiseOnDemand]: 560/563 looper letters, 45 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-08-30 04:52:12,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 215 flow [2023-08-30 04:52:12,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:52:12,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:52:12,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 735 transitions. [2023-08-30 04:52:12,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4351687388987567 [2023-08-30 04:52:12,022 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 735 transitions. [2023-08-30 04:52:12,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 735 transitions. [2023-08-30 04:52:12,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:52:12,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 735 transitions. [2023-08-30 04:52:12,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:12,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:12,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:12,029 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 127 flow. Second operand 3 states and 735 transitions. [2023-08-30 04:52:12,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 215 flow [2023-08-30 04:52:12,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 207 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:52:12,030 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 117 flow [2023-08-30 04:52:12,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-08-30 04:52:12,031 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -8 predicate places. [2023-08-30 04:52:12,032 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 117 flow [2023-08-30 04:52:12,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:12,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:52:12,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:52:12,047 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 (4)] Ended with exit code 0 [2023-08-30 04:52:12,241 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 04:52:12,242 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:52:12,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:52:12,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1033353, now seen corresponding path program 1 times [2023-08-30 04:52:12,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:52:12,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290993292] [2023-08-30 04:52:12,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:52:12,243 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 04:52:12,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:52:12,248 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 04:52:12,249 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 04:52:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:52:12,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 04:52:12,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:52:12,385 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 04:52:12,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 04:52:12,455 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 04:52:12,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:52:12,652 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 04:52:12,653 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:52:12,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290993292] [2023-08-30 04:52:12,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290993292] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:52:12,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:52:12,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 04:52:12,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024836010] [2023-08-30 04:52:12,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:52:12,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:52:12,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:52:12,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:52:12,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:52:13,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 563 [2023-08-30 04:52:13,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 117 flow. Second operand has 6 states, 6 states have (on average 218.0) internal successors, (1308), 6 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:13,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:52:13,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 563 [2023-08-30 04:52:13,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:52:14,769 INFO L130 PetriNetUnfolder]: 1810/2968 cut-off events. [2023-08-30 04:52:14,769 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-30 04:52:14,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6005 conditions, 2968 events. 1810/2968 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 16600 event pairs, 1512 based on Foata normal form. 0/1096 useless extension candidates. Maximal degree in co-relation 5996. Up to 988 conditions per place. [2023-08-30 04:52:14,785 INFO L137 encePairwiseOnDemand]: 555/563 looper letters, 116 selfloop transitions, 17 changer transitions 0/133 dead transitions. [2023-08-30 04:52:14,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 133 transitions, 583 flow [2023-08-30 04:52:14,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:52:14,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:52:14,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1441 transitions. [2023-08-30 04:52:14,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265837773830669 [2023-08-30 04:52:14,790 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1441 transitions. [2023-08-30 04:52:14,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1441 transitions. [2023-08-30 04:52:14,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:52:14,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1441 transitions. [2023-08-30 04:52:14,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 240.16666666666666) internal successors, (1441), 6 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:14,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 563.0) internal successors, (3941), 7 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:14,801 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 563.0) internal successors, (3941), 7 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:14,801 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 117 flow. Second operand 6 states and 1441 transitions. [2023-08-30 04:52:14,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 133 transitions, 583 flow [2023-08-30 04:52:14,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 133 transitions, 582 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:52:14,806 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 245 flow [2023-08-30 04:52:14,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=245, PETRI_PLACES=54, PETRI_TRANSITIONS=59} [2023-08-30 04:52:14,808 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2023-08-30 04:52:14,808 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 245 flow [2023-08-30 04:52:14,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 218.0) internal successors, (1308), 6 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:14,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:52:14,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:52:14,819 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 04:52:15,018 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 04:52:15,018 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:52:15,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:52:15,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1035600, now seen corresponding path program 1 times [2023-08-30 04:52:15,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:52:15,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397953490] [2023-08-30 04:52:15,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:52:15,020 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 04:52:15,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:52:15,021 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 04:52:15,027 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 04:52:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:52:15,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 04:52:15,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:52:15,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:52:15,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:52:15,143 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 04:52:15,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 04:52:15,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 04:52:15,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:52:15,214 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 04:52:15,238 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 04:52:15,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:52:15,239 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:52:15,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397953490] [2023-08-30 04:52:15,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397953490] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:52:15,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:52:15,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:52:15,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658728736] [2023-08-30 04:52:15,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:52:15,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:52:15,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:52:15,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:52:15,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:52:15,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 563 [2023-08-30 04:52:15,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 245 flow. Second operand has 4 states, 4 states have (on average 230.75) internal successors, (923), 4 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:15,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:52:15,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 563 [2023-08-30 04:52:15,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:52:16,003 INFO L130 PetriNetUnfolder]: 1199/2060 cut-off events. [2023-08-30 04:52:16,003 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 04:52:16,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4234 conditions, 2060 events. 1199/2060 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 11637 event pairs, 987 based on Foata normal form. 0/913 useless extension candidates. Maximal degree in co-relation 4220. Up to 2060 conditions per place. [2023-08-30 04:52:16,013 INFO L137 encePairwiseOnDemand]: 560/563 looper letters, 54 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-30 04:52:16,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 55 transitions, 335 flow [2023-08-30 04:52:16,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:52:16,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:52:16,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 733 transitions. [2023-08-30 04:52:16,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339846062759029 [2023-08-30 04:52:16,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 733 transitions. [2023-08-30 04:52:16,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 733 transitions. [2023-08-30 04:52:16,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:52:16,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 733 transitions. [2023-08-30 04:52:16,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:16,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:16,022 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:16,022 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 245 flow. Second operand 3 states and 733 transitions. [2023-08-30 04:52:16,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 55 transitions, 335 flow [2023-08-30 04:52:16,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 55 transitions, 316 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 04:52:16,028 INFO L231 Difference]: Finished difference. Result has 53 places, 55 transitions, 208 flow [2023-08-30 04:52:16,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=53, PETRI_TRANSITIONS=55} [2023-08-30 04:52:16,031 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2023-08-30 04:52:16,031 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 55 transitions, 208 flow [2023-08-30 04:52:16,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.75) internal successors, (923), 4 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:16,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:52:16,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:52:16,044 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 04:52:16,241 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 04:52:16,242 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:52:16,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:52:16,243 INFO L85 PathProgramCache]: Analyzing trace with hash 995233483, now seen corresponding path program 1 times [2023-08-30 04:52:16,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:52:16,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192678551] [2023-08-30 04:52:16,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:52:16,243 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 04:52:16,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:52:16,245 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 04:52:16,245 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 04:52:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:52:16,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 04:52:16,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:52:16,369 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 04:52:16,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2023-08-30 04:52:16,396 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 04:52:16,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 04:52:16,422 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 04:52:16,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:52:16,423 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:52:16,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192678551] [2023-08-30 04:52:16,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192678551] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:52:16,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:52:16,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:52:16,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27266226] [2023-08-30 04:52:16,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:52:16,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:52:16,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:52:16,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:52:16,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:52:16,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 563 [2023-08-30 04:52:16,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 55 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:16,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:52:16,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 563 [2023-08-30 04:52:16,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:52:16,895 INFO L130 PetriNetUnfolder]: 1133/1931 cut-off events. [2023-08-30 04:52:16,896 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-30 04:52:16,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3967 conditions, 1931 events. 1133/1931 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 10720 event pairs, 930 based on Foata normal form. 0/892 useless extension candidates. Maximal degree in co-relation 3952. Up to 1931 conditions per place. [2023-08-30 04:52:16,906 INFO L137 encePairwiseOnDemand]: 560/563 looper letters, 52 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-08-30 04:52:16,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 310 flow [2023-08-30 04:52:16,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:52:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:52:16,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 725 transitions. [2023-08-30 04:52:16,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42924807578448787 [2023-08-30 04:52:16,910 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 725 transitions. [2023-08-30 04:52:16,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 725 transitions. [2023-08-30 04:52:16,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:52:16,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 725 transitions. [2023-08-30 04:52:16,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:16,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:16,915 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:16,915 INFO L175 Difference]: Start difference. First operand has 53 places, 55 transitions, 208 flow. Second operand 3 states and 725 transitions. [2023-08-30 04:52:16,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 310 flow [2023-08-30 04:52:16,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 309 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:52:16,918 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 205 flow [2023-08-30 04:52:16,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-08-30 04:52:16,918 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2023-08-30 04:52:16,919 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 205 flow [2023-08-30 04:52:16,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:16,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:52:16,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:52:16,929 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 04:52:17,128 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 04:52:17,129 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:52:17,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:52:17,129 INFO L85 PathProgramCache]: Analyzing trace with hash 995233484, now seen corresponding path program 1 times [2023-08-30 04:52:17,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:52:17,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2147091411] [2023-08-30 04:52:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:52:17,130 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 04:52:17,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:52:17,131 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 04:52:17,133 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 04:52:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:52:17,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:52:17,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:52:17,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:52:17,244 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-08-30 04:52:17,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2023-08-30 04:52:17,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-08-30 04:52:17,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:52:17,304 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 04:52:17,351 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 04:52:17,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:52:17,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:52:17,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2147091411] [2023-08-30 04:52:17,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2147091411] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:52:17,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:52:17,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:52:17,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718105983] [2023-08-30 04:52:17,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:52:17,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:52:17,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:52:17,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:52:17,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:52:17,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 563 [2023-08-30 04:52:17,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 229.25) internal successors, (917), 4 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:17,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:52:17,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 563 [2023-08-30 04:52:17,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:52:17,957 INFO L130 PetriNetUnfolder]: 1067/1802 cut-off events. [2023-08-30 04:52:17,957 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-30 04:52:17,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3710 conditions, 1802 events. 1067/1802 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 9817 event pairs, 873 based on Foata normal form. 0/871 useless extension candidates. Maximal degree in co-relation 3694. Up to 1802 conditions per place. [2023-08-30 04:52:17,964 INFO L137 encePairwiseOnDemand]: 560/563 looper letters, 50 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-30 04:52:17,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 51 transitions, 303 flow [2023-08-30 04:52:17,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:52:17,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:52:17,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 723 transitions. [2023-08-30 04:52:17,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280639431616341 [2023-08-30 04:52:17,966 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 723 transitions. [2023-08-30 04:52:17,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 723 transitions. [2023-08-30 04:52:17,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:52:17,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 723 transitions. [2023-08-30 04:52:17,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:17,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:17,971 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:17,972 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 205 flow. Second operand 3 states and 723 transitions. [2023-08-30 04:52:17,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 51 transitions, 303 flow [2023-08-30 04:52:17,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:52:17,974 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 202 flow [2023-08-30 04:52:17,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2023-08-30 04:52:17,974 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2023-08-30 04:52:17,975 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 202 flow [2023-08-30 04:52:17,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 229.25) internal successors, (917), 4 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:17,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:52:17,975 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 04:52:17,985 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 04:52:18,184 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 04:52:18,185 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:52:18,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:52:18,185 INFO L85 PathProgramCache]: Analyzing trace with hash 722063534, now seen corresponding path program 2 times [2023-08-30 04:52:18,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:52:18,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378807287] [2023-08-30 04:52:18,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:52:18,186 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 04:52:18,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:52:18,187 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 04:52:18,187 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 04:52:18,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:52:18,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:52:18,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 04:52:18,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:52:18,311 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 04:52:18,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 04:52:18,434 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 04:52:18,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:52:18,904 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 04:52:18,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:52:18,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378807287] [2023-08-30 04:52:18,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378807287] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:52:18,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:52:18,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 04:52:18,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624063432] [2023-08-30 04:52:18,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:52:18,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:52:18,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:52:18,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:52:18,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:52:22,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 563 [2023-08-30 04:52:22,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 202 flow. Second operand has 12 states, 12 states have (on average 220.0) internal successors, (2640), 12 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:22,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:52:22,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 563 [2023-08-30 04:52:22,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:52:27,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:52:28,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:52:30,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:52:32,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:52:37,111 INFO L130 PetriNetUnfolder]: 3543/5977 cut-off events. [2023-08-30 04:52:37,111 INFO L131 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2023-08-30 04:52:37,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12214 conditions, 5977 events. 3543/5977 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 37051 event pairs, 2910 based on Foata normal form. 12/2882 useless extension candidates. Maximal degree in co-relation 12197. Up to 980 conditions per place. [2023-08-30 04:52:37,131 INFO L137 encePairwiseOnDemand]: 556/563 looper letters, 315 selfloop transitions, 32 changer transitions 0/347 dead transitions. [2023-08-30 04:52:37,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 347 transitions, 1628 flow [2023-08-30 04:52:37,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 04:52:37,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 04:52:37,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2987 transitions. [2023-08-30 04:52:37,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44212551805802247 [2023-08-30 04:52:37,140 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2987 transitions. [2023-08-30 04:52:37,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2987 transitions. [2023-08-30 04:52:37,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:52:37,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2987 transitions. [2023-08-30 04:52:37,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 248.91666666666666) internal successors, (2987), 12 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:37,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 563.0) internal successors, (7319), 13 states have internal predecessors, (7319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:37,157 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 563.0) internal successors, (7319), 13 states have internal predecessors, (7319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:37,157 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 202 flow. Second operand 12 states and 2987 transitions. [2023-08-30 04:52:37,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 347 transitions, 1628 flow [2023-08-30 04:52:37,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 347 transitions, 1627 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:52:37,162 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 445 flow [2023-08-30 04:52:37,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=445, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2023-08-30 04:52:37,164 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2023-08-30 04:52:37,164 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 445 flow [2023-08-30 04:52:37,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 220.0) internal successors, (2640), 12 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:37,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:52:37,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:52:37,181 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 04:52:37,376 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 04:52:37,377 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:52:37,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:52:37,378 INFO L85 PathProgramCache]: Analyzing trace with hash 787464540, now seen corresponding path program 1 times [2023-08-30 04:52:37,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:52:37,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10233909] [2023-08-30 04:52:37,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:52:37,378 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 04:52:37,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:52:37,383 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 04:52:37,383 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 04:52:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:52:37,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:52:37,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:52:37,484 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 04:52:37,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:52:37,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:52:37,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10233909] [2023-08-30 04:52:37,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10233909] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:52:37,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:52:37,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:52:37,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386496774] [2023-08-30 04:52:37,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:52:37,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:52:37,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:52:37,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:52:37,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:52:37,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 563 [2023-08-30 04:52:37,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 445 flow. Second operand has 5 states, 5 states have (on average 225.2) internal successors, (1126), 5 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:37,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:52:37,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 563 [2023-08-30 04:52:37,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:52:38,628 INFO L130 PetriNetUnfolder]: 4224/7320 cut-off events. [2023-08-30 04:52:38,629 INFO L131 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2023-08-30 04:52:38,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15098 conditions, 7320 events. 4224/7320 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 49002 event pairs, 2970 based on Foata normal form. 0/3819 useless extension candidates. Maximal degree in co-relation 15073. Up to 5976 conditions per place. [2023-08-30 04:52:38,655 INFO L137 encePairwiseOnDemand]: 554/563 looper letters, 109 selfloop transitions, 4 changer transitions 0/113 dead transitions. [2023-08-30 04:52:38,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 113 transitions, 883 flow [2023-08-30 04:52:38,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:52:38,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:52:38,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1194 transitions. [2023-08-30 04:52:38,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4241563055062167 [2023-08-30 04:52:38,660 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1194 transitions. [2023-08-30 04:52:38,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1194 transitions. [2023-08-30 04:52:38,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:52:38,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1194 transitions. [2023-08-30 04:52:38,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 238.8) internal successors, (1194), 5 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:38,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:38,667 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:38,667 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 445 flow. Second operand 5 states and 1194 transitions. [2023-08-30 04:52:38,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 113 transitions, 883 flow [2023-08-30 04:52:38,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 113 transitions, 800 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-08-30 04:52:38,672 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 411 flow [2023-08-30 04:52:38,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=411, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2023-08-30 04:52:38,673 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 16 predicate places. [2023-08-30 04:52:38,673 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 411 flow [2023-08-30 04:52:38,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.2) internal successors, (1126), 5 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:38,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:52:38,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:52:38,684 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 04:52:38,883 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 04:52:38,884 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:52:38,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:52:38,885 INFO L85 PathProgramCache]: Analyzing trace with hash 974536312, now seen corresponding path program 1 times [2023-08-30 04:52:38,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:52:38,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88997126] [2023-08-30 04:52:38,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:52:38,886 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 04:52:38,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:52:38,887 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 04:52:38,892 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 04:52:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:52:38,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:52:38,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:52:39,020 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 04:52:39,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:52:39,021 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:52:39,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88997126] [2023-08-30 04:52:39,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88997126] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:52:39,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:52:39,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:52:39,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240364893] [2023-08-30 04:52:39,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:52:39,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:52:39,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:52:39,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:52:39,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:52:39,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 563 [2023-08-30 04:52:39,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 411 flow. Second operand has 5 states, 5 states have (on average 225.4) internal successors, (1127), 5 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:39,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:52:39,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 563 [2023-08-30 04:52:39,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:52:40,243 INFO L130 PetriNetUnfolder]: 3939/6859 cut-off events. [2023-08-30 04:52:40,243 INFO L131 PetriNetUnfolder]: For 955/955 co-relation queries the response was YES. [2023-08-30 04:52:40,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15314 conditions, 6859 events. 3939/6859 cut-off events. For 955/955 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 45480 event pairs, 3171 based on Foata normal form. 16/3789 useless extension candidates. Maximal degree in co-relation 15286. Up to 6583 conditions per place. [2023-08-30 04:52:40,273 INFO L137 encePairwiseOnDemand]: 554/563 looper letters, 85 selfloop transitions, 15 changer transitions 0/100 dead transitions. [2023-08-30 04:52:40,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 100 transitions, 684 flow [2023-08-30 04:52:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:52:40,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:52:40,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1191 transitions. [2023-08-30 04:52:40,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230905861456483 [2023-08-30 04:52:40,278 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1191 transitions. [2023-08-30 04:52:40,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1191 transitions. [2023-08-30 04:52:40,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:52:40,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1191 transitions. [2023-08-30 04:52:40,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 238.2) internal successors, (1191), 5 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:40,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:40,285 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:40,285 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 411 flow. Second operand 5 states and 1191 transitions. [2023-08-30 04:52:40,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 100 transitions, 684 flow [2023-08-30 04:52:40,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 100 transitions, 678 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 04:52:40,296 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 485 flow [2023-08-30 04:52:40,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=485, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2023-08-30 04:52:40,298 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 22 predicate places. [2023-08-30 04:52:40,298 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 485 flow [2023-08-30 04:52:40,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.4) internal successors, (1127), 5 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:40,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:52:40,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:52:40,316 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 04:52:40,515 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 04:52:40,516 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:52:40,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:52:40,516 INFO L85 PathProgramCache]: Analyzing trace with hash 144461704, now seen corresponding path program 1 times [2023-08-30 04:52:40,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:52:40,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581494611] [2023-08-30 04:52:40,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:52:40,517 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 04:52:40,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:52:40,519 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 04:52:40,521 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 04:52:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:52:40,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 04:52:40,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:52:40,681 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 04:52:40,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 04:52:40,718 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:52:40,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:52:40,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:52:40,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 04:52:40,870 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:52:40,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:52:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:52:40,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:52:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:52:43,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:52:43,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581494611] [2023-08-30 04:52:43,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581494611] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:52:43,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:52:43,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 04:52:43,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926494395] [2023-08-30 04:52:43,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:52:43,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 04:52:43,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:52:43,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 04:52:43,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 04:52:47,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 563 [2023-08-30 04:52:47,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 485 flow. Second operand has 10 states, 10 states have (on average 206.6) internal successors, (2066), 10 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:52:47,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:52:47,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 563 [2023-08-30 04:52:47,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:52:51,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 04:52:53,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:53:02,363 INFO L130 PetriNetUnfolder]: 13770/23630 cut-off events. [2023-08-30 04:53:02,364 INFO L131 PetriNetUnfolder]: For 4058/4058 co-relation queries the response was YES. [2023-08-30 04:53:02,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56336 conditions, 23630 events. 13770/23630 cut-off events. For 4058/4058 co-relation queries the response was YES. Maximal size of possible extension queue 1027. Compared 191338 event pairs, 3426 based on Foata normal form. 0/12634 useless extension candidates. Maximal degree in co-relation 56305. Up to 3738 conditions per place. [2023-08-30 04:53:02,481 INFO L137 encePairwiseOnDemand]: 549/563 looper letters, 546 selfloop transitions, 87 changer transitions 0/633 dead transitions. [2023-08-30 04:53:02,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 633 transitions, 3501 flow [2023-08-30 04:53:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 04:53:02,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 04:53:02,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 7379 transitions. [2023-08-30 04:53:02,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39716884654717693 [2023-08-30 04:53:02,502 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 7379 transitions. [2023-08-30 04:53:02,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 7379 transitions. [2023-08-30 04:53:02,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:53:02,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 7379 transitions. [2023-08-30 04:53:02,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 223.6060606060606) internal successors, (7379), 33 states have internal predecessors, (7379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:02,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 563.0) internal successors, (19142), 34 states have internal predecessors, (19142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:02,550 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 563.0) internal successors, (19142), 34 states have internal predecessors, (19142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:02,550 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 485 flow. Second operand 33 states and 7379 transitions. [2023-08-30 04:53:02,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 633 transitions, 3501 flow [2023-08-30 04:53:02,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 633 transitions, 3454 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-30 04:53:02,612 INFO L231 Difference]: Finished difference. Result has 111 places, 152 transitions, 1177 flow [2023-08-30 04:53:02,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1177, PETRI_PLACES=111, PETRI_TRANSITIONS=152} [2023-08-30 04:53:02,613 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 57 predicate places. [2023-08-30 04:53:02,614 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 152 transitions, 1177 flow [2023-08-30 04:53:02,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 206.6) internal successors, (2066), 10 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:02,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:53:02,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:53:02,634 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 04:53:02,834 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 04:53:02,834 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:53:02,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:53:02,835 INFO L85 PathProgramCache]: Analyzing trace with hash 842118659, now seen corresponding path program 1 times [2023-08-30 04:53:02,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:53:02,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38266727] [2023-08-30 04:53:02,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:53:02,835 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 04:53:02,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:53:02,836 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 04:53:02,838 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 04:53:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:53:02,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:53:02,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:53:02,974 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 04:53:02,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:53:02,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:53:02,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38266727] [2023-08-30 04:53:02,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38266727] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:53:02,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:53:02,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:53:02,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054810290] [2023-08-30 04:53:02,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:53:02,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:53:02,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:53:02,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:53:02,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:53:03,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 563 [2023-08-30 04:53:03,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 152 transitions, 1177 flow. Second operand has 5 states, 5 states have (on average 225.6) internal successors, (1128), 5 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:03,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:53:03,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 563 [2023-08-30 04:53:03,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:53:05,727 INFO L130 PetriNetUnfolder]: 13330/22870 cut-off events. [2023-08-30 04:53:05,727 INFO L131 PetriNetUnfolder]: For 17012/17012 co-relation queries the response was YES. [2023-08-30 04:53:05,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60711 conditions, 22870 events. 13330/22870 cut-off events. For 17012/17012 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 182511 event pairs, 10986 based on Foata normal form. 0/14002 useless extension candidates. Maximal degree in co-relation 60674. Up to 22286 conditions per place. [2023-08-30 04:53:05,819 INFO L137 encePairwiseOnDemand]: 554/563 looper letters, 182 selfloop transitions, 4 changer transitions 0/186 dead transitions. [2023-08-30 04:53:05,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 186 transitions, 1754 flow [2023-08-30 04:53:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:53:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:53:05,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1183 transitions. [2023-08-30 04:53:05,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4202486678507993 [2023-08-30 04:53:05,824 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1183 transitions. [2023-08-30 04:53:05,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1183 transitions. [2023-08-30 04:53:05,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:53:05,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1183 transitions. [2023-08-30 04:53:05,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 236.6) internal successors, (1183), 5 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:05,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:05,830 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:05,830 INFO L175 Difference]: Start difference. First operand has 111 places, 152 transitions, 1177 flow. Second operand 5 states and 1183 transitions. [2023-08-30 04:53:05,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 186 transitions, 1754 flow [2023-08-30 04:53:05,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 186 transitions, 1651 flow, removed 29 selfloop flow, removed 3 redundant places. [2023-08-30 04:53:05,940 INFO L231 Difference]: Finished difference. Result has 114 places, 153 transitions, 1114 flow [2023-08-30 04:53:05,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1114, PETRI_PLACES=114, PETRI_TRANSITIONS=153} [2023-08-30 04:53:05,941 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 60 predicate places. [2023-08-30 04:53:05,941 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 153 transitions, 1114 flow [2023-08-30 04:53:05,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.6) internal successors, (1128), 5 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:05,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:53:05,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:53:05,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 04:53:06,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:53:06,151 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:53:06,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:53:06,151 INFO L85 PathProgramCache]: Analyzing trace with hash 144461703, now seen corresponding path program 1 times [2023-08-30 04:53:06,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:53:06,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036687972] [2023-08-30 04:53:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:53:06,152 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 04:53:06,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:53:06,153 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:53:06,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 04:53:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:53:06,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:53:06,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:53:06,291 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:53:06,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:53:06,316 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 04:53:06,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 04:53:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 04:53:06,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:53:06,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:53:06,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036687972] [2023-08-30 04:53:06,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036687972] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:53:06,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:53:06,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:53:06,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915722144] [2023-08-30 04:53:06,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:53:06,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:53:06,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:53:06,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:53:06,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:53:06,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 563 [2023-08-30 04:53:06,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 153 transitions, 1114 flow. Second operand has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:06,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:53:06,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 563 [2023-08-30 04:53:06,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:53:08,778 INFO L130 PetriNetUnfolder]: 10000/17266 cut-off events. [2023-08-30 04:53:08,779 INFO L131 PetriNetUnfolder]: For 14780/14780 co-relation queries the response was YES. [2023-08-30 04:53:08,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50936 conditions, 17266 events. 10000/17266 cut-off events. For 14780/14780 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 131836 event pairs, 8124 based on Foata normal form. 630/12694 useless extension candidates. Maximal degree in co-relation 50897. Up to 17253 conditions per place. [2023-08-30 04:53:08,870 INFO L137 encePairwiseOnDemand]: 558/563 looper letters, 138 selfloop transitions, 12 changer transitions 0/150 dead transitions. [2023-08-30 04:53:08,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 150 transitions, 1402 flow [2023-08-30 04:53:08,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:53:08,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:53:08,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 904 transitions. [2023-08-30 04:53:08,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40142095914742454 [2023-08-30 04:53:08,873 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 904 transitions. [2023-08-30 04:53:08,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 904 transitions. [2023-08-30 04:53:08,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:53:08,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 904 transitions. [2023-08-30 04:53:08,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:08,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:08,878 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:08,879 INFO L175 Difference]: Start difference. First operand has 114 places, 153 transitions, 1114 flow. Second operand 4 states and 904 transitions. [2023-08-30 04:53:08,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 150 transitions, 1402 flow [2023-08-30 04:53:09,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 150 transitions, 1325 flow, removed 36 selfloop flow, removed 2 redundant places. [2023-08-30 04:53:09,103 INFO L231 Difference]: Finished difference. Result has 112 places, 150 transitions, 1049 flow [2023-08-30 04:53:09,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1049, PETRI_PLACES=112, PETRI_TRANSITIONS=150} [2023-08-30 04:53:09,104 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2023-08-30 04:53:09,104 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 150 transitions, 1049 flow [2023-08-30 04:53:09,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:09,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:53:09,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:53:09,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 04:53:09,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:53:09,305 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:53:09,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:53:09,306 INFO L85 PathProgramCache]: Analyzing trace with hash 144461753, now seen corresponding path program 1 times [2023-08-30 04:53:09,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:53:09,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826138732] [2023-08-30 04:53:09,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:53:09,307 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 04:53:09,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:53:09,313 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:53:09,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 04:53:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:53:09,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 04:53:09,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:53:09,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 04:53:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 04:53:09,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:53:09,411 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:53:09,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826138732] [2023-08-30 04:53:09,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826138732] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:53:09,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:53:09,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:53:09,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705410120] [2023-08-30 04:53:09,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:53:09,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:53:09,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:53:09,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:53:09,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:53:09,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 563 [2023-08-30 04:53:09,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 150 transitions, 1049 flow. Second operand has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:09,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:53:09,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 563 [2023-08-30 04:53:09,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:53:11,152 INFO L130 PetriNetUnfolder]: 7201/12625 cut-off events. [2023-08-30 04:53:11,153 INFO L131 PetriNetUnfolder]: For 11903/11903 co-relation queries the response was YES. [2023-08-30 04:53:11,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36094 conditions, 12625 events. 7201/12625 cut-off events. For 11903/11903 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 93104 event pairs, 5703 based on Foata normal form. 0/9985 useless extension candidates. Maximal degree in co-relation 36055. Up to 12553 conditions per place. [2023-08-30 04:53:11,204 INFO L137 encePairwiseOnDemand]: 558/563 looper letters, 121 selfloop transitions, 12 changer transitions 0/133 dead transitions. [2023-08-30 04:53:11,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 133 transitions, 1210 flow [2023-08-30 04:53:11,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:53:11,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:53:11,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 901 transitions. [2023-08-30 04:53:11,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40008880994671403 [2023-08-30 04:53:11,207 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 901 transitions. [2023-08-30 04:53:11,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 901 transitions. [2023-08-30 04:53:11,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:53:11,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 901 transitions. [2023-08-30 04:53:11,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.25) internal successors, (901), 4 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:11,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:11,211 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:11,211 INFO L175 Difference]: Start difference. First operand has 112 places, 150 transitions, 1049 flow. Second operand 4 states and 901 transitions. [2023-08-30 04:53:11,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 133 transitions, 1210 flow [2023-08-30 04:53:11,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 133 transitions, 1197 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:53:11,341 INFO L231 Difference]: Finished difference. Result has 110 places, 133 transitions, 955 flow [2023-08-30 04:53:11,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=955, PETRI_PLACES=110, PETRI_TRANSITIONS=133} [2023-08-30 04:53:11,342 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 56 predicate places. [2023-08-30 04:53:11,342 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 133 transitions, 955 flow [2023-08-30 04:53:11,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:11,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:53:11,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:53:11,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-08-30 04:53:11,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:53:11,552 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:53:11,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:53:11,552 INFO L85 PathProgramCache]: Analyzing trace with hash 144461752, now seen corresponding path program 1 times [2023-08-30 04:53:11,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:53:11,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71125306] [2023-08-30 04:53:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:53:11,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:53:11,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:53:11,554 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:53:11,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 04:53:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:53:11,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:53:11,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:53:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:53:11,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:53:11,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 04:53:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:53:11,849 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:53:11,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71125306] [2023-08-30 04:53:11,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71125306] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:53:11,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:53:11,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 04:53:11,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511621220] [2023-08-30 04:53:11,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:53:11,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 04:53:11,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:53:11,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 04:53:11,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 04:53:14,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 563 [2023-08-30 04:53:14,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 133 transitions, 955 flow. Second operand has 10 states, 10 states have (on average 216.4) internal successors, (2164), 10 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:14,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:53:14,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 563 [2023-08-30 04:53:14,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:53:16,853 INFO L130 PetriNetUnfolder]: 8281/14677 cut-off events. [2023-08-30 04:53:16,853 INFO L131 PetriNetUnfolder]: For 17678/17678 co-relation queries the response was YES. [2023-08-30 04:53:16,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42240 conditions, 14677 events. 8281/14677 cut-off events. For 17678/17678 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 111465 event pairs, 2517 based on Foata normal form. 0/12361 useless extension candidates. Maximal degree in co-relation 42201. Up to 5208 conditions per place. [2023-08-30 04:53:16,942 INFO L137 encePairwiseOnDemand]: 553/563 looper letters, 179 selfloop transitions, 52 changer transitions 0/231 dead transitions. [2023-08-30 04:53:16,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 231 transitions, 1780 flow [2023-08-30 04:53:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 04:53:16,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 04:53:16,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2507 transitions. [2023-08-30 04:53:16,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4048118843855966 [2023-08-30 04:53:16,948 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2507 transitions. [2023-08-30 04:53:16,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2507 transitions. [2023-08-30 04:53:16,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:53:16,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2507 transitions. [2023-08-30 04:53:16,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 227.9090909090909) internal successors, (2507), 11 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:16,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:16,957 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:16,957 INFO L175 Difference]: Start difference. First operand has 110 places, 133 transitions, 955 flow. Second operand 11 states and 2507 transitions. [2023-08-30 04:53:16,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 231 transitions, 1780 flow [2023-08-30 04:53:17,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 231 transitions, 1766 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:53:17,116 INFO L231 Difference]: Finished difference. Result has 121 places, 136 transitions, 1143 flow [2023-08-30 04:53:17,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1143, PETRI_PLACES=121, PETRI_TRANSITIONS=136} [2023-08-30 04:53:17,116 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 67 predicate places. [2023-08-30 04:53:17,117 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 136 transitions, 1143 flow [2023-08-30 04:53:17,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 216.4) internal successors, (2164), 10 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:17,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:53:17,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:53:17,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 04:53:17,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:53:17,327 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:53:17,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:53:17,327 INFO L85 PathProgramCache]: Analyzing trace with hash 229464159, now seen corresponding path program 1 times [2023-08-30 04:53:17,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:53:17,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999751832] [2023-08-30 04:53:17,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:53:17,328 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 04:53:17,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:53:17,329 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:53:17,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 04:53:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:53:17,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:53:17,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:53:17,464 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 04:53:17,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:53:17,465 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:53:17,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999751832] [2023-08-30 04:53:17,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999751832] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:53:17,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:53:17,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:53:17,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074055817] [2023-08-30 04:53:17,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:53:17,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:53:17,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:53:17,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:53:17,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:53:17,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 563 [2023-08-30 04:53:17,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 136 transitions, 1143 flow. Second operand has 5 states, 5 states have (on average 225.8) internal successors, (1129), 5 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:17,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:53:17,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 563 [2023-08-30 04:53:17,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:53:19,758 INFO L130 PetriNetUnfolder]: 8203/14551 cut-off events. [2023-08-30 04:53:19,758 INFO L131 PetriNetUnfolder]: For 19486/19486 co-relation queries the response was YES. [2023-08-30 04:53:19,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45000 conditions, 14551 events. 8203/14551 cut-off events. For 19486/19486 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 110375 event pairs, 6603 based on Foata normal form. 24/12415 useless extension candidates. Maximal degree in co-relation 44957. Up to 14313 conditions per place. [2023-08-30 04:53:19,855 INFO L137 encePairwiseOnDemand]: 556/563 looper letters, 139 selfloop transitions, 17 changer transitions 0/156 dead transitions. [2023-08-30 04:53:19,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 156 transitions, 1534 flow [2023-08-30 04:53:19,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:53:19,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:53:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1171 transitions. [2023-08-30 04:53:19,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41598579040852574 [2023-08-30 04:53:19,857 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1171 transitions. [2023-08-30 04:53:19,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1171 transitions. [2023-08-30 04:53:19,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:53:19,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1171 transitions. [2023-08-30 04:53:19,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 234.2) internal successors, (1171), 5 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:19,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:19,861 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:19,861 INFO L175 Difference]: Start difference. First operand has 121 places, 136 transitions, 1143 flow. Second operand 5 states and 1171 transitions. [2023-08-30 04:53:19,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 156 transitions, 1534 flow [2023-08-30 04:53:20,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 156 transitions, 1476 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-30 04:53:20,013 INFO L231 Difference]: Finished difference. Result has 123 places, 138 transitions, 1148 flow [2023-08-30 04:53:20,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1148, PETRI_PLACES=123, PETRI_TRANSITIONS=138} [2023-08-30 04:53:20,014 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 69 predicate places. [2023-08-30 04:53:20,014 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 138 transitions, 1148 flow [2023-08-30 04:53:20,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.8) internal successors, (1129), 5 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:20,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:53:20,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:53:20,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 04:53:20,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:53:20,224 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:53:20,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:53:20,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1391682927, now seen corresponding path program 1 times [2023-08-30 04:53:20,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:53:20,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594155273] [2023-08-30 04:53:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:53:20,225 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 04:53:20,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:53:20,226 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:53:20,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 04:53:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:53:20,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 04:53:20,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:53:20,393 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 04:53:20,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 04:53:20,433 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:53:20,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:53:20,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:53:20,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 04:53:20,537 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:53:20,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:53:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:53:20,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:53:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:53:25,048 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:53:25,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594155273] [2023-08-30 04:53:25,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594155273] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:53:25,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:53:25,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 04:53:25,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033229290] [2023-08-30 04:53:25,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:53:25,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 04:53:25,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:53:25,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 04:53:25,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 04:53:28,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 563 [2023-08-30 04:53:28,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 138 transitions, 1148 flow. Second operand has 10 states, 10 states have (on average 207.0) internal successors, (2070), 10 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:28,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:53:28,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 563 [2023-08-30 04:53:28,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:53:37,090 INFO L130 PetriNetUnfolder]: 10759/18745 cut-off events. [2023-08-30 04:53:37,090 INFO L131 PetriNetUnfolder]: For 35188/35188 co-relation queries the response was YES. [2023-08-30 04:53:37,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62134 conditions, 18745 events. 10759/18745 cut-off events. For 35188/35188 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 147246 event pairs, 5325 based on Foata normal form. 0/15883 useless extension candidates. Maximal degree in co-relation 62092. Up to 4141 conditions per place. [2023-08-30 04:53:37,204 INFO L137 encePairwiseOnDemand]: 552/563 looper letters, 498 selfloop transitions, 63 changer transitions 0/561 dead transitions. [2023-08-30 04:53:37,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 561 transitions, 4352 flow [2023-08-30 04:53:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 04:53:37,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 04:53:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 7234 transitions. [2023-08-30 04:53:37,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38936433607836807 [2023-08-30 04:53:37,210 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 7234 transitions. [2023-08-30 04:53:37,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 7234 transitions. [2023-08-30 04:53:37,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:53:37,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 7234 transitions. [2023-08-30 04:53:37,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 219.21212121212122) internal successors, (7234), 33 states have internal predecessors, (7234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:37,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 563.0) internal successors, (19142), 34 states have internal predecessors, (19142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:37,228 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 563.0) internal successors, (19142), 34 states have internal predecessors, (19142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:37,228 INFO L175 Difference]: Start difference. First operand has 123 places, 138 transitions, 1148 flow. Second operand 33 states and 7234 transitions. [2023-08-30 04:53:37,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 561 transitions, 4352 flow [2023-08-30 04:53:37,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 561 transitions, 4321 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:53:37,405 INFO L231 Difference]: Finished difference. Result has 159 places, 168 transitions, 1488 flow [2023-08-30 04:53:37,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1488, PETRI_PLACES=159, PETRI_TRANSITIONS=168} [2023-08-30 04:53:37,406 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 105 predicate places. [2023-08-30 04:53:37,406 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 168 transitions, 1488 flow [2023-08-30 04:53:37,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 207.0) internal successors, (2070), 10 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:37,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:53:37,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:53:37,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 04:53:37,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:53:37,616 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:53:37,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:53:37,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1391683065, now seen corresponding path program 1 times [2023-08-30 04:53:37,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:53:37,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392375390] [2023-08-30 04:53:37,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:53:37,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:53:37,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:53:37,618 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:53:37,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 04:53:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:53:37,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:53:37,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:53:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:53:37,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:53:37,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 04:53:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:53:37,943 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:53:37,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392375390] [2023-08-30 04:53:37,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392375390] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:53:37,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:53:37,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 04:53:37,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65377057] [2023-08-30 04:53:37,943 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:53:37,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 04:53:37,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:53:37,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 04:53:37,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 04:53:39,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 563 [2023-08-30 04:53:39,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 168 transitions, 1488 flow. Second operand has 10 states, 10 states have (on average 216.8) internal successors, (2168), 10 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:39,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:53:39,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 563 [2023-08-30 04:53:39,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:53:42,826 INFO L130 PetriNetUnfolder]: 11515/20347 cut-off events. [2023-08-30 04:53:42,826 INFO L131 PetriNetUnfolder]: For 79863/79863 co-relation queries the response was YES. [2023-08-30 04:53:42,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86409 conditions, 20347 events. 11515/20347 cut-off events. For 79863/79863 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 164578 event pairs, 6513 based on Foata normal form. 360/19087 useless extension candidates. Maximal degree in co-relation 86360. Up to 12380 conditions per place. [2023-08-30 04:53:42,956 INFO L137 encePairwiseOnDemand]: 555/563 looper letters, 221 selfloop transitions, 49 changer transitions 0/270 dead transitions. [2023-08-30 04:53:42,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 270 transitions, 2683 flow [2023-08-30 04:53:42,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:53:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:53:42,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2042 transitions. [2023-08-30 04:53:42,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40299980264456287 [2023-08-30 04:53:42,959 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2042 transitions. [2023-08-30 04:53:42,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2042 transitions. [2023-08-30 04:53:42,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:53:42,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2042 transitions. [2023-08-30 04:53:42,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 226.88888888888889) internal successors, (2042), 9 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:42,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 563.0) internal successors, (5630), 10 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:42,964 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 563.0) internal successors, (5630), 10 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:42,964 INFO L175 Difference]: Start difference. First operand has 159 places, 168 transitions, 1488 flow. Second operand 9 states and 2042 transitions. [2023-08-30 04:53:42,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 270 transitions, 2683 flow [2023-08-30 04:53:43,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 270 transitions, 2593 flow, removed 26 selfloop flow, removed 6 redundant places. [2023-08-30 04:53:43,720 INFO L231 Difference]: Finished difference. Result has 163 places, 165 transitions, 1521 flow [2023-08-30 04:53:43,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1521, PETRI_PLACES=163, PETRI_TRANSITIONS=165} [2023-08-30 04:53:43,720 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 109 predicate places. [2023-08-30 04:53:43,720 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 165 transitions, 1521 flow [2023-08-30 04:53:43,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 216.8) internal successors, (2168), 10 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:43,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:53:43,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:53:43,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 04:53:43,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:53:43,922 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:53:43,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:53:43,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1388823273, now seen corresponding path program 1 times [2023-08-30 04:53:43,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:53:43,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727106642] [2023-08-30 04:53:43,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:53:43,922 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 04:53:43,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:53:43,924 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:53:43,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 04:53:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:53:44,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 04:53:44,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:53:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:53:44,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:53:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:53:44,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:53:44,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727106642] [2023-08-30 04:53:44,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727106642] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:53:44,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:53:44,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 04:53:44,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029600916] [2023-08-30 04:53:44,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:53:44,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:53:44,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:53:44,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:53:44,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:53:44,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 563 [2023-08-30 04:53:44,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 165 transitions, 1521 flow. Second operand has 12 states, 12 states have (on average 221.66666666666666) internal successors, (2660), 12 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:44,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:53:44,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 563 [2023-08-30 04:53:44,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:53:47,989 INFO L130 PetriNetUnfolder]: 10003/17809 cut-off events. [2023-08-30 04:53:47,989 INFO L131 PetriNetUnfolder]: For 117182/117182 co-relation queries the response was YES. [2023-08-30 04:53:48,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78305 conditions, 17809 events. 10003/17809 cut-off events. For 117182/117182 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 142487 event pairs, 6766 based on Foata normal form. 288/17953 useless extension candidates. Maximal degree in co-relation 78253. Up to 13706 conditions per place. [2023-08-30 04:53:48,114 INFO L137 encePairwiseOnDemand]: 552/563 looper letters, 225 selfloop transitions, 27 changer transitions 0/252 dead transitions. [2023-08-30 04:53:48,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 252 transitions, 2629 flow [2023-08-30 04:53:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 04:53:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 04:53:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2520 transitions. [2023-08-30 04:53:48,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069110285806556 [2023-08-30 04:53:48,117 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2520 transitions. [2023-08-30 04:53:48,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2520 transitions. [2023-08-30 04:53:48,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:53:48,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2520 transitions. [2023-08-30 04:53:48,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 229.0909090909091) internal successors, (2520), 11 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:48,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:48,123 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:48,123 INFO L175 Difference]: Start difference. First operand has 163 places, 165 transitions, 1521 flow. Second operand 11 states and 2520 transitions. [2023-08-30 04:53:48,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 252 transitions, 2629 flow [2023-08-30 04:53:48,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 252 transitions, 2546 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-08-30 04:53:48,583 INFO L231 Difference]: Finished difference. Result has 167 places, 163 transitions, 1568 flow [2023-08-30 04:53:48,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1568, PETRI_PLACES=167, PETRI_TRANSITIONS=163} [2023-08-30 04:53:48,583 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 113 predicate places. [2023-08-30 04:53:48,584 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 163 transitions, 1568 flow [2023-08-30 04:53:48,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 221.66666666666666) internal successors, (2660), 12 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:48,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:53:48,584 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:53:48,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-08-30 04:53:48,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:53:48,785 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:53:48,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:53:48,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1038367364, now seen corresponding path program 2 times [2023-08-30 04:53:48,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:53:48,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366552317] [2023-08-30 04:53:48,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:53:48,786 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 04:53:48,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:53:48,787 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:53:48,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 04:53:48,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:53:48,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:53:48,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 04:53:48,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:53:48,948 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:53:48,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:53:48,983 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:53:48,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:53:49,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:53:49,032 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 04:53:49,040 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:53:49,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:53:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:53:49,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:53:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:53:49,642 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:53:49,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366552317] [2023-08-30 04:53:49,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366552317] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:53:49,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:53:49,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 04:53:49,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730889680] [2023-08-30 04:53:49,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:53:49,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 04:53:49,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:53:49,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 04:53:49,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-30 04:53:59,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 563 [2023-08-30 04:53:59,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 163 transitions, 1568 flow. Second operand has 14 states, 14 states have (on average 210.57142857142858) internal successors, (2948), 14 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:53:59,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:53:59,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 563 [2023-08-30 04:53:59,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:54:04,946 INFO L130 PetriNetUnfolder]: 13585/24361 cut-off events. [2023-08-30 04:54:04,946 INFO L131 PetriNetUnfolder]: For 198384/198384 co-relation queries the response was YES. [2023-08-30 04:54:05,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105411 conditions, 24361 events. 13585/24361 cut-off events. For 198384/198384 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 204438 event pairs, 2860 based on Foata normal form. 468/24541 useless extension candidates. Maximal degree in co-relation 105358. Up to 5736 conditions per place. [2023-08-30 04:54:05,132 INFO L137 encePairwiseOnDemand]: 554/563 looper letters, 356 selfloop transitions, 65 changer transitions 0/421 dead transitions. [2023-08-30 04:54:05,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 421 transitions, 4084 flow [2023-08-30 04:54:05,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 04:54:05,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 04:54:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3814 transitions. [2023-08-30 04:54:05,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39849545502037403 [2023-08-30 04:54:05,138 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3814 transitions. [2023-08-30 04:54:05,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3814 transitions. [2023-08-30 04:54:05,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:54:05,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3814 transitions. [2023-08-30 04:54:05,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 224.35294117647058) internal successors, (3814), 17 states have internal predecessors, (3814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:05,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 563.0) internal successors, (10134), 18 states have internal predecessors, (10134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:05,149 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 563.0) internal successors, (10134), 18 states have internal predecessors, (10134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:05,150 INFO L175 Difference]: Start difference. First operand has 167 places, 163 transitions, 1568 flow. Second operand 17 states and 3814 transitions. [2023-08-30 04:54:05,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 421 transitions, 4084 flow [2023-08-30 04:54:05,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 421 transitions, 4068 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 04:54:05,761 INFO L231 Difference]: Finished difference. Result has 186 places, 183 transitions, 1937 flow [2023-08-30 04:54:05,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1937, PETRI_PLACES=186, PETRI_TRANSITIONS=183} [2023-08-30 04:54:05,762 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 132 predicate places. [2023-08-30 04:54:05,762 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 183 transitions, 1937 flow [2023-08-30 04:54:05,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 210.57142857142858) internal successors, (2948), 14 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:05,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:54:05,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:54:05,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 04:54:05,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:54:05,972 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:54:05,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:54:05,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1038367412, now seen corresponding path program 1 times [2023-08-30 04:54:05,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:54:05,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503876808] [2023-08-30 04:54:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:54:05,973 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 04:54:05,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:54:05,974 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:54:05,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 04:54:06,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:54:06,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 04:54:06,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:54:06,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 04:54:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 04:54:06,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:54:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 04:54:06,563 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:54:06,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503876808] [2023-08-30 04:54:06,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503876808] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:54:06,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:54:06,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-30 04:54:06,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518083554] [2023-08-30 04:54:06,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:54:06,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:54:06,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:54:06,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:54:06,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:54:09,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 563 [2023-08-30 04:54:09,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 183 transitions, 1937 flow. Second operand has 12 states, 12 states have (on average 217.5) internal successors, (2610), 12 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:09,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:54:09,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 563 [2023-08-30 04:54:09,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:54:16,637 INFO L130 PetriNetUnfolder]: 20056/35764 cut-off events. [2023-08-30 04:54:16,638 INFO L131 PetriNetUnfolder]: For 333462/333462 co-relation queries the response was YES. [2023-08-30 04:54:16,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167483 conditions, 35764 events. 20056/35764 cut-off events. For 333462/333462 co-relation queries the response was YES. Maximal size of possible extension queue 1236. Compared 310132 event pairs, 2456 based on Foata normal form. 486/36106 useless extension candidates. Maximal degree in co-relation 167423. Up to 6931 conditions per place. [2023-08-30 04:54:16,957 INFO L137 encePairwiseOnDemand]: 555/563 looper letters, 309 selfloop transitions, 91 changer transitions 0/400 dead transitions. [2023-08-30 04:54:16,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 400 transitions, 4549 flow [2023-08-30 04:54:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:54:16,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:54:16,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2062 transitions. [2023-08-30 04:54:16,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40694691138740874 [2023-08-30 04:54:16,961 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2062 transitions. [2023-08-30 04:54:16,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2062 transitions. [2023-08-30 04:54:16,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:54:16,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2062 transitions. [2023-08-30 04:54:16,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 229.11111111111111) internal successors, (2062), 9 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:16,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 563.0) internal successors, (5630), 10 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:16,965 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 563.0) internal successors, (5630), 10 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:16,965 INFO L175 Difference]: Start difference. First operand has 186 places, 183 transitions, 1937 flow. Second operand 9 states and 2062 transitions. [2023-08-30 04:54:16,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 400 transitions, 4549 flow [2023-08-30 04:54:18,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 400 transitions, 4442 flow, removed 31 selfloop flow, removed 6 redundant places. [2023-08-30 04:54:18,213 INFO L231 Difference]: Finished difference. Result has 192 places, 209 transitions, 2415 flow [2023-08-30 04:54:18,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1785, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2415, PETRI_PLACES=192, PETRI_TRANSITIONS=209} [2023-08-30 04:54:18,214 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 138 predicate places. [2023-08-30 04:54:18,214 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 209 transitions, 2415 flow [2023-08-30 04:54:18,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 217.5) internal successors, (2610), 12 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:18,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:54:18,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:54:18,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 04:54:18,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:54:18,415 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:54:18,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:54:18,415 INFO L85 PathProgramCache]: Analyzing trace with hash 192505985, now seen corresponding path program 1 times [2023-08-30 04:54:18,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:54:18,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71299166] [2023-08-30 04:54:18,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:54:18,416 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 04:54:18,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:54:18,417 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:54:18,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 04:54:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:54:18,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 04:54:18,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:54:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:54:18,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:54:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:54:18,718 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:54:18,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71299166] [2023-08-30 04:54:18,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71299166] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:54:18,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:54:18,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 04:54:18,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384059071] [2023-08-30 04:54:18,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:54:18,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:54:18,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:54:18,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:54:18,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:54:19,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 563 [2023-08-30 04:54:19,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 209 transitions, 2415 flow. Second operand has 12 states, 12 states have (on average 221.83333333333334) internal successors, (2662), 12 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:19,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:54:19,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 563 [2023-08-30 04:54:19,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:54:25,500 INFO L130 PetriNetUnfolder]: 19084/34252 cut-off events. [2023-08-30 04:54:25,500 INFO L131 PetriNetUnfolder]: For 335058/335058 co-relation queries the response was YES. [2023-08-30 04:54:25,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165877 conditions, 34252 events. 19084/34252 cut-off events. For 335058/335058 co-relation queries the response was YES. Maximal size of possible extension queue 1202. Compared 300638 event pairs, 15306 based on Foata normal form. 810/35062 useless extension candidates. Maximal degree in co-relation 165816. Up to 30644 conditions per place. [2023-08-30 04:54:25,827 INFO L137 encePairwiseOnDemand]: 553/563 looper letters, 261 selfloop transitions, 30 changer transitions 0/291 dead transitions. [2023-08-30 04:54:25,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 291 transitions, 3503 flow [2023-08-30 04:54:25,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 04:54:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 04:54:25,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2520 transitions. [2023-08-30 04:54:25,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069110285806556 [2023-08-30 04:54:25,831 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2520 transitions. [2023-08-30 04:54:25,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2520 transitions. [2023-08-30 04:54:25,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:54:25,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2520 transitions. [2023-08-30 04:54:25,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 229.0909090909091) internal successors, (2520), 11 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:25,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:25,839 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:25,839 INFO L175 Difference]: Start difference. First operand has 192 places, 209 transitions, 2415 flow. Second operand 11 states and 2520 transitions. [2023-08-30 04:54:25,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 291 transitions, 3503 flow [2023-08-30 04:54:27,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 291 transitions, 3433 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 04:54:27,413 INFO L231 Difference]: Finished difference. Result has 197 places, 206 transitions, 2402 flow [2023-08-30 04:54:27,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=2330, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2402, PETRI_PLACES=197, PETRI_TRANSITIONS=206} [2023-08-30 04:54:27,414 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 143 predicate places. [2023-08-30 04:54:27,414 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 206 transitions, 2402 flow [2023-08-30 04:54:27,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 221.83333333333334) internal successors, (2662), 12 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:27,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:54:27,415 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 04:54:27,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 04:54:27,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:54:27,617 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:54:27,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:54:27,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1658630862, now seen corresponding path program 3 times [2023-08-30 04:54:27,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:54:27,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911704578] [2023-08-30 04:54:27,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 04:54:27,618 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 04:54:27,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:54:27,619 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:54:27,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 04:54:27,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 04:54:27,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:54:27,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 04:54:27,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:54:27,841 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 04:54:27,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 04:54:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:54:28,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:54:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:54:29,833 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:54:29,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911704578] [2023-08-30 04:54:29,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911704578] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:54:29,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:54:29,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 04:54:29,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457448039] [2023-08-30 04:54:29,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:54:29,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 04:54:29,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:54:29,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 04:54:29,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 04:54:49,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 563 [2023-08-30 04:54:49,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 206 transitions, 2402 flow. Second operand has 24 states, 24 states have (on average 220.0) internal successors, (5280), 24 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:54:49,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:54:49,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 563 [2023-08-30 04:54:49,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:54:57,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:54:59,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:55:01,701 WARN L539 Checker$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 04:55:03,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:55:05,713 WARN L539 Checker$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 04:55:08,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:55:10,105 WARN L539 Checker$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 04:55:12,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:55:13,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:55:16,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:55:18,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:55:22,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:55:23,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:55:25,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:55:29,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:55:33,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:55:49,362 INFO L130 PetriNetUnfolder]: 38068/68272 cut-off events. [2023-08-30 04:55:49,362 INFO L131 PetriNetUnfolder]: For 706767/706767 co-relation queries the response was YES. [2023-08-30 04:55:50,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338551 conditions, 68272 events. 38068/68272 cut-off events. For 706767/706767 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 630659 event pairs, 33144 based on Foata normal form. 36/68308 useless extension candidates. Maximal degree in co-relation 338488. Up to 12241 conditions per place. [2023-08-30 04:55:50,270 INFO L137 encePairwiseOnDemand]: 556/563 looper letters, 1122 selfloop transitions, 90 changer transitions 0/1212 dead transitions. [2023-08-30 04:55:50,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 1212 transitions, 15825 flow [2023-08-30 04:55:50,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 04:55:50,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 04:55:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 7526 transitions. [2023-08-30 04:55:50,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4177397868561279 [2023-08-30 04:55:50,280 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 7526 transitions. [2023-08-30 04:55:50,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 7526 transitions. [2023-08-30 04:55:50,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:55:50,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 7526 transitions. [2023-08-30 04:55:50,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 235.1875) internal successors, (7526), 32 states have internal predecessors, (7526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:50,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 563.0) internal successors, (18579), 33 states have internal predecessors, (18579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:50,302 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 563.0) internal successors, (18579), 33 states have internal predecessors, (18579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:50,302 INFO L175 Difference]: Start difference. First operand has 197 places, 206 transitions, 2402 flow. Second operand 32 states and 7526 transitions. [2023-08-30 04:55:50,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 1212 transitions, 15825 flow [2023-08-30 04:55:56,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 1212 transitions, 15696 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 04:55:56,066 INFO L231 Difference]: Finished difference. Result has 242 places, 255 transitions, 3372 flow [2023-08-30 04:55:56,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=2368, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3372, PETRI_PLACES=242, PETRI_TRANSITIONS=255} [2023-08-30 04:55:56,067 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 188 predicate places. [2023-08-30 04:55:56,067 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 255 transitions, 3372 flow [2023-08-30 04:55:56,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 220.0) internal successors, (5280), 24 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:56,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:55:56,069 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:55:56,077 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 (24)] Ended with exit code 0 [2023-08-30 04:55:56,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:55:56,273 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:55:56,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:55:56,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2081692464, now seen corresponding path program 1 times [2023-08-30 04:55:56,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:55:56,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020086281] [2023-08-30 04:55:56,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:55:56,274 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 04:55:56,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:55:56,275 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:55:56,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 04:55:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:55:56,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 04:55:56,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:55:56,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 04:55:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 04:55:56,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:55:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 04:55:56,789 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:55:56,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020086281] [2023-08-30 04:55:56,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020086281] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:55:56,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:55:56,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 04:55:56,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131527007] [2023-08-30 04:55:56,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:55:56,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 04:55:56,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:55:56,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 04:55:56,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 04:55:59,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 563 [2023-08-30 04:55:59,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 255 transitions, 3372 flow. Second operand has 10 states, 10 states have (on average 221.0) internal successors, (2210), 10 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:59,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:55:59,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 563 [2023-08-30 04:55:59,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:29,666 INFO L130 PetriNetUnfolder]: 77758/137878 cut-off events. [2023-08-30 04:56:29,667 INFO L131 PetriNetUnfolder]: For 1185350/1185350 co-relation queries the response was YES. [2023-08-30 04:56:31,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748301 conditions, 137878 events. 77758/137878 cut-off events. For 1185350/1185350 co-relation queries the response was YES. Maximal size of possible extension queue 3328. Compared 1391077 event pairs, 21732 based on Foata normal form. 9288/147166 useless extension candidates. Maximal degree in co-relation 748219. Up to 44404 conditions per place. [2023-08-30 04:56:32,381 INFO L137 encePairwiseOnDemand]: 558/563 looper letters, 504 selfloop transitions, 94 changer transitions 0/598 dead transitions. [2023-08-30 04:56:32,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 598 transitions, 8274 flow [2023-08-30 04:56:32,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 04:56:32,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 04:56:32,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1852 transitions. [2023-08-30 04:56:32,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.411190053285968 [2023-08-30 04:56:32,388 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1852 transitions. [2023-08-30 04:56:32,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1852 transitions. [2023-08-30 04:56:32,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:32,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1852 transitions. [2023-08-30 04:56:32,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 231.5) internal successors, (1852), 8 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:32,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 563.0) internal successors, (5067), 9 states have internal predecessors, (5067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:32,393 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 563.0) internal successors, (5067), 9 states have internal predecessors, (5067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:32,394 INFO L175 Difference]: Start difference. First operand has 242 places, 255 transitions, 3372 flow. Second operand 8 states and 1852 transitions. [2023-08-30 04:56:32,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 598 transitions, 8274 flow [2023-08-30 04:56:42,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 598 transitions, 8086 flow, removed 39 selfloop flow, removed 10 redundant places. [2023-08-30 04:56:42,040 INFO L231 Difference]: Finished difference. Result has 242 places, 261 transitions, 3597 flow [2023-08-30 04:56:42,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=3184, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3597, PETRI_PLACES=242, PETRI_TRANSITIONS=261} [2023-08-30 04:56:42,041 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 188 predicate places. [2023-08-30 04:56:42,041 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 261 transitions, 3597 flow [2023-08-30 04:56:42,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 221.0) internal successors, (2210), 10 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:42,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:42,042 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:56:42,049 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 (25)] Ended with exit code 0 [2023-08-30 04:56:42,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:42,242 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:56:42,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:42,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2081692602, now seen corresponding path program 2 times [2023-08-30 04:56:42,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:42,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233405157] [2023-08-30 04:56:42,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:56:42,243 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 04:56:42,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:42,244 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:42,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 04:56:42,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:56:42,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:56:42,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 04:56:42,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:42,410 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:56:42,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:56:42,446 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:56:42,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:56:42,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:56:42,500 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 04:56:42,506 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:56:42,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:56:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:56:42,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:56:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:56:45,159 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:45,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233405157] [2023-08-30 04:56:45,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233405157] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:56:45,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:56:45,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 04:56:45,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865196790] [2023-08-30 04:56:45,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:56:45,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 04:56:45,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:45,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 04:56:45,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-30 04:56:48,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:56:53,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 563 [2023-08-30 04:56:53,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 261 transitions, 3597 flow. Second operand has 14 states, 14 states have (on average 209.71428571428572) internal successors, (2936), 14 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:53,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:53,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 563 [2023-08-30 04:56:53,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:23,230 INFO L130 PetriNetUnfolder]: 71260/126808 cut-off events. [2023-08-30 04:57:23,230 INFO L131 PetriNetUnfolder]: For 1756278/1756278 co-relation queries the response was YES. [2023-08-30 04:57:25,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710535 conditions, 126808 events. 71260/126808 cut-off events. For 1756278/1756278 co-relation queries the response was YES. Maximal size of possible extension queue 3001. Compared 1267524 event pairs, 43602 based on Foata normal form. 4572/131380 useless extension candidates. Maximal degree in co-relation 710450. Up to 77143 conditions per place. [2023-08-30 04:57:25,862 INFO L137 encePairwiseOnDemand]: 555/563 looper letters, 551 selfloop transitions, 61 changer transitions 0/612 dead transitions. [2023-08-30 04:57:25,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 612 transitions, 7977 flow [2023-08-30 04:57:25,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 04:57:25,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 04:57:25,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3343 transitions. [2023-08-30 04:57:25,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958555358200118 [2023-08-30 04:57:25,866 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3343 transitions. [2023-08-30 04:57:25,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3343 transitions. [2023-08-30 04:57:25,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:25,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3343 transitions. [2023-08-30 04:57:25,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 222.86666666666667) internal successors, (3343), 15 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:25,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 563.0) internal successors, (9008), 16 states have internal predecessors, (9008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:25,876 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 563.0) internal successors, (9008), 16 states have internal predecessors, (9008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:25,877 INFO L175 Difference]: Start difference. First operand has 242 places, 261 transitions, 3597 flow. Second operand 15 states and 3343 transitions. [2023-08-30 04:57:25,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 612 transitions, 7977 flow [2023-08-30 04:58:06,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 612 transitions, 7722 flow, removed 72 selfloop flow, removed 3 redundant places. [2023-08-30 04:58:06,683 INFO L231 Difference]: Finished difference. Result has 257 places, 263 transitions, 3579 flow [2023-08-30 04:58:06,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3579, PETRI_PLACES=257, PETRI_TRANSITIONS=263} [2023-08-30 04:58:06,684 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 203 predicate places. [2023-08-30 04:58:06,684 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 263 transitions, 3579 flow [2023-08-30 04:58:06,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 209.71428571428572) internal successors, (2936), 14 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:06,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:06,685 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:06,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:06,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:06,886 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:58:06,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:06,886 INFO L85 PathProgramCache]: Analyzing trace with hash -107953014, now seen corresponding path program 3 times [2023-08-30 04:58:06,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:06,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803163484] [2023-08-30 04:58:06,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 04:58:06,887 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 04:58:06,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:06,887 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:06,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 04:58:07,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 04:58:07,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:58:07,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 04:58:07,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:07,080 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 04:58:07,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 04:58:07,120 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:58:07,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:58:07,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:58:07,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 04:58:07,180 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:58:07,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:58:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 04:58:07,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:58:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 04:58:08,038 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:08,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803163484] [2023-08-30 04:58:08,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803163484] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:58:08,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:58:08,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 04:58:08,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164346023] [2023-08-30 04:58:08,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:58:08,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:58:08,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:08,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:58:08,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:58:13,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 563 [2023-08-30 04:58:13,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 263 transitions, 3579 flow. Second operand has 12 states, 12 states have (on average 217.0) internal successors, (2604), 12 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:13,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:13,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 563 [2023-08-30 04:58:13,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:51,335 INFO L130 PetriNetUnfolder]: 87586/153790 cut-off events. [2023-08-30 04:58:51,335 INFO L131 PetriNetUnfolder]: For 1824762/1824762 co-relation queries the response was YES. [2023-08-30 04:58:54,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840221 conditions, 153790 events. 87586/153790 cut-off events. For 1824762/1824762 co-relation queries the response was YES. Maximal size of possible extension queue 3564. Compared 1536995 event pairs, 17790 based on Foata normal form. 12384/166174 useless extension candidates. Maximal degree in co-relation 840131. Up to 37017 conditions per place. [2023-08-30 04:58:54,717 INFO L137 encePairwiseOnDemand]: 557/563 looper letters, 695 selfloop transitions, 73 changer transitions 0/768 dead transitions. [2023-08-30 04:58:54,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 768 transitions, 10512 flow [2023-08-30 04:58:54,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 04:58:54,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 04:58:54,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2281 transitions. [2023-08-30 04:58:54,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051509769094139 [2023-08-30 04:58:54,723 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2281 transitions. [2023-08-30 04:58:54,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2281 transitions. [2023-08-30 04:58:54,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:54,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2281 transitions. [2023-08-30 04:58:54,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 228.1) internal successors, (2281), 10 states have internal predecessors, (2281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:54,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 563.0) internal successors, (6193), 11 states have internal predecessors, (6193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:54,729 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 563.0) internal successors, (6193), 11 states have internal predecessors, (6193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:54,729 INFO L175 Difference]: Start difference. First operand has 257 places, 263 transitions, 3579 flow. Second operand 10 states and 2281 transitions. [2023-08-30 04:58:54,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 768 transitions, 10512 flow [2023-08-30 04:59:32,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 768 transitions, 10260 flow, removed 72 selfloop flow, removed 9 redundant places. [2023-08-30 04:59:32,471 INFO L231 Difference]: Finished difference. Result has 262 places, 273 transitions, 3798 flow [2023-08-30 04:59:32,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=3351, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3798, PETRI_PLACES=262, PETRI_TRANSITIONS=273} [2023-08-30 04:59:32,471 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 208 predicate places. [2023-08-30 04:59:32,471 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 273 transitions, 3798 flow [2023-08-30 04:59:32,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 217.0) internal successors, (2604), 12 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:32,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:32,472 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:32,480 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 (27)] Ended with exit code 0 [2023-08-30 04:59:32,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:32,673 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:59:32,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:32,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1438703333, now seen corresponding path program 3 times [2023-08-30 04:59:32,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:32,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384437083] [2023-08-30 04:59:32,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 04:59:32,674 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 04:59:32,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:32,675 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:32,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 04:59:32,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 04:59:32,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:59:32,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 04:59:32,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:32,919 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 04:59:32,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 04:59:32,957 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:59:32,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:59:33,055 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:59:33,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:59:33,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-30 04:59:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 04:59:33,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:59:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 04:59:35,670 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:35,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384437083] [2023-08-30 04:59:35,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384437083] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:59:35,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:59:35,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-30 04:59:35,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923985216] [2023-08-30 04:59:35,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:59:35,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 04:59:35,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:35,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 04:59:35,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-08-30 04:59:58,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:00:06,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:00:12,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:00:24,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:00:34,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:00:34,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 563 [2023-08-30 05:00:34,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 273 transitions, 3798 flow. Second operand has 16 states, 16 states have (on average 197.5) internal successors, (3160), 16 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:34,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:00:34,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 563 [2023-08-30 05:00:34,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:00:39,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:00:51,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 05:01:48,212 INFO L130 PetriNetUnfolder]: 92671/163365 cut-off events. [2023-08-30 05:01:48,212 INFO L131 PetriNetUnfolder]: For 2149840/2149840 co-relation queries the response was YES. [2023-08-30 05:01:51,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 870231 conditions, 163365 events. 92671/163365 cut-off events. For 2149840/2149840 co-relation queries the response was YES. Maximal size of possible extension queue 3807. Compared 1656814 event pairs, 35610 based on Foata normal form. 342/163707 useless extension candidates. Maximal degree in co-relation 870138. Up to 57590 conditions per place. [2023-08-30 05:01:52,651 INFO L137 encePairwiseOnDemand]: 551/563 looper letters, 549 selfloop transitions, 174 changer transitions 0/723 dead transitions. [2023-08-30 05:01:52,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 723 transitions, 10868 flow [2023-08-30 05:01:52,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 05:01:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 05:01:52,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 5182 transitions. [2023-08-30 05:01:52,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36817051509769094 [2023-08-30 05:01:52,659 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 5182 transitions. [2023-08-30 05:01:52,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 5182 transitions. [2023-08-30 05:01:52,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:01:52,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 5182 transitions. [2023-08-30 05:01:52,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 207.28) internal successors, (5182), 25 states have internal predecessors, (5182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:01:52,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 563.0) internal successors, (14638), 26 states have internal predecessors, (14638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:01:52,678 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 563.0) internal successors, (14638), 26 states have internal predecessors, (14638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:01:52,678 INFO L175 Difference]: Start difference. First operand has 262 places, 273 transitions, 3798 flow. Second operand 25 states and 5182 transitions. [2023-08-30 05:01:52,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 723 transitions, 10868 flow [2023-08-30 05:02:16,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 723 transitions, 10036 flow, removed 288 selfloop flow, removed 6 redundant places. [2023-08-30 05:02:16,729 INFO L231 Difference]: Finished difference. Result has 287 places, 347 transitions, 4951 flow [2023-08-30 05:02:16,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=3622, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4951, PETRI_PLACES=287, PETRI_TRANSITIONS=347} [2023-08-30 05:02:16,730 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 233 predicate places. [2023-08-30 05:02:16,731 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 347 transitions, 4951 flow [2023-08-30 05:02:16,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 197.5) internal successors, (3160), 16 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:16,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:02:16,732 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 05:02:16,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-08-30 05:02:16,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:02:16,936 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:02:16,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:02:16,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1485871487, now seen corresponding path program 4 times [2023-08-30 05:02:16,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:02:16,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816023806] [2023-08-30 05:02:16,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 05:02:16,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:02:16,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:02:16,940 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:02:16,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-30 05:02:17,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 05:02:17,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:02:17,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 05:02:17,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:02:17,188 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 05:02:17,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 05:02:17,339 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 13 treesize of output 9 [2023-08-30 05:02:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 05:02:17,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:02:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 05:02:18,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:02:18,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816023806] [2023-08-30 05:02:18,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816023806] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:02:18,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:02:18,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-30 05:02:18,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010771530] [2023-08-30 05:02:18,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:02:18,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 05:02:18,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:02:18,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 05:02:18,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-08-30 05:02:25,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 563 [2023-08-30 05:02:25,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 347 transitions, 4951 flow. Second operand has 16 states, 16 states have (on average 213.625) internal successors, (3418), 16 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:25,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:02:25,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 563 [2023-08-30 05:02:25,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:20,731 INFO L130 PetriNetUnfolder]: 111165/196840 cut-off events. [2023-08-30 05:03:20,732 INFO L131 PetriNetUnfolder]: For 2221125/2221125 co-relation queries the response was YES. [2023-08-30 05:03:25,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 989691 conditions, 196840 events. 111165/196840 cut-off events. For 2221125/2221125 co-relation queries the response was YES. Maximal size of possible extension queue 4599. Compared 2054965 event pairs, 77279 based on Foata normal form. 1330/198170 useless extension candidates. Maximal degree in co-relation 989591. Up to 152565 conditions per place. [2023-08-30 05:03:25,834 INFO L137 encePairwiseOnDemand]: 554/563 looper letters, 556 selfloop transitions, 36 changer transitions 0/592 dead transitions. [2023-08-30 05:03:25,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 592 transitions, 8812 flow [2023-08-30 05:03:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 05:03:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 05:03:25,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2893 transitions. [2023-08-30 05:03:25,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952725782210684 [2023-08-30 05:03:25,838 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2893 transitions. [2023-08-30 05:03:25,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2893 transitions. [2023-08-30 05:03:25,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:25,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2893 transitions. [2023-08-30 05:03:25,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 222.53846153846155) internal successors, (2893), 13 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:25,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 563.0) internal successors, (7882), 14 states have internal predecessors, (7882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:25,845 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 563.0) internal successors, (7882), 14 states have internal predecessors, (7882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:25,845 INFO L175 Difference]: Start difference. First operand has 287 places, 347 transitions, 4951 flow. Second operand 13 states and 2893 transitions. [2023-08-30 05:03:25,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 592 transitions, 8812 flow [2023-08-30 05:03:53,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 592 transitions, 8684 flow, removed 37 selfloop flow, removed 5 redundant places. [2023-08-30 05:03:53,813 INFO L231 Difference]: Finished difference. Result has 299 places, 360 transitions, 5194 flow [2023-08-30 05:03:53,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=4857, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5194, PETRI_PLACES=299, PETRI_TRANSITIONS=360} [2023-08-30 05:03:53,814 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 245 predicate places. [2023-08-30 05:03:53,814 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 360 transitions, 5194 flow [2023-08-30 05:03:53,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 213.625) internal successors, (3418), 16 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:53,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:53,815 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:53,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2023-08-30 05:03:54,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:54,026 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:03:54,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:54,027 INFO L85 PathProgramCache]: Analyzing trace with hash -350106726, now seen corresponding path program 5 times [2023-08-30 05:03:54,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:54,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341372941] [2023-08-30 05:03:54,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 05:03:54,027 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:54,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:54,028 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:54,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-30 05:03:54,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 05:03:54,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:03:54,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 05:03:54,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:54,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:03:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:55,025 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:55,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341372941] [2023-08-30 05:03:55,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341372941] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:03:55,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:03:55,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-08-30 05:03:55,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889514798] [2023-08-30 05:03:55,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:03:55,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 05:03:55,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:55,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 05:03:55,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-08-30 05:03:59,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 563 [2023-08-30 05:03:59,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 360 transitions, 5194 flow. Second operand has 16 states, 16 states have (on average 221.5) internal successors, (3544), 16 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:59,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:59,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 563 [2023-08-30 05:03:59,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15