./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/verifythis/tree_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version f4b24e32 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 ../sv-benchmarks/c/verifythis/tree_max.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 05:52:58,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 05:52:58,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 05:52:58,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 05:52:58,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 05:52:58,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 05:52:58,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 05:52:58,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 05:52:58,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 05:52:58,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 05:52:58,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 05:52:58,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 05:52:59,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 05:52:59,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 05:52:59,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 05:52:59,005 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 05:52:59,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 05:52:59,007 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 05:52:59,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 05:52:59,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 05:52:59,015 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 05:52:59,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 05:52:59,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 05:52:59,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 05:52:59,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 05:52:59,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 05:52:59,026 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 05:52:59,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 05:52:59,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 05:52:59,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 05:52:59,029 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 05:52:59,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 05:52:59,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 05:52:59,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 05:52:59,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 05:52:59,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 05:52:59,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 05:52:59,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 05:52:59,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 05:52:59,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 05:52:59,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 05:52:59,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 05:52:59,037 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2022-07-14 05:52:59,068 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 05:52:59,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 05:52:59,069 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 05:52:59,069 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 05:52:59,070 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 05:52:59,070 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 05:52:59,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 05:52:59,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 05:52:59,071 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 05:52:59,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 05:52:59,072 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 05:52:59,072 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 05:52:59,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 05:52:59,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 05:52:59,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 05:52:59,073 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 05:52:59,073 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 05:52:59,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 05:52:59,074 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 05:52:59,074 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 05:52:59,075 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 05:52:59,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 05:52:59,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 05:52:59,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 05:52:59,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 05:52:59,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 05:52:59,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 05:52:59,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 05:52:59,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 05:52:59,077 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2022-07-14 05:52:59,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 05:52:59,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 05:52:59,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 05:52:59,316 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 05:52:59,316 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 05:52:59,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_max.c [2022-07-14 05:52:59,388 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6861da43/4641de00506f4b5e87edf4a6555f1f8b/FLAG2c0d96ed3 [2022-07-14 05:52:59,723 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 05:52:59,724 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c [2022-07-14 05:52:59,730 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6861da43/4641de00506f4b5e87edf4a6555f1f8b/FLAG2c0d96ed3 [2022-07-14 05:53:00,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6861da43/4641de00506f4b5e87edf4a6555f1f8b [2022-07-14 05:53:00,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 05:53:00,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 05:53:00,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 05:53:00,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 05:53:00,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 05:53:00,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 05:53:00" (1/1) ... [2022-07-14 05:53:00,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a5b90b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:53:00, skipping insertion in model container [2022-07-14 05:53:00,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 05:53:00" (1/1) ... [2022-07-14 05:53:00,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 05:53:00,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 05:53:00,300 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2022-07-14 05:53:00,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 05:53:00,328 ERROR L326 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) [2022-07-14 05:53:00,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@16dbe554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:53:00, skipping insertion in model container [2022-07-14 05:53:00,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 05:53:00,334 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-14 05:53:00,336 INFO L158 Benchmark]: Toolchain (without parser) took 189.38ms. Allocated memory is still 92.3MB. Free memory was 59.6MB in the beginning and 69.1MB in the end (delta: -9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 05:53:00,337 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 92.3MB. Free memory was 46.8MB in the beginning and 46.7MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 05:53:00,338 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.39ms. Allocated memory is still 92.3MB. Free memory was 59.4MB in the beginning and 69.1MB in the end (delta: -9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 05:53:00,340 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 92.3MB. Free memory was 46.8MB in the beginning and 46.7MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 187.39ms. Allocated memory is still 92.3MB. Free memory was 59.4MB in the beginning and 69.1MB in the end (delta: -9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 27]: 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 ../sv-benchmarks/c/verifythis/tree_max.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 05:53:02,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 05:53:02,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 05:53:02,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 05:53:02,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 05:53:02,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 05:53:02,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 05:53:02,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 05:53:02,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 05:53:02,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 05:53:02,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 05:53:02,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 05:53:02,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 05:53:02,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 05:53:02,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 05:53:02,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 05:53:02,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 05:53:02,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 05:53:02,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 05:53:02,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 05:53:02,131 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 05:53:02,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 05:53:02,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 05:53:02,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 05:53:02,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 05:53:02,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 05:53:02,149 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 05:53:02,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 05:53:02,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 05:53:02,150 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 05:53:02,151 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 05:53:02,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 05:53:02,152 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 05:53:02,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 05:53:02,155 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 05:53:02,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 05:53:02,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 05:53:02,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 05:53:02,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 05:53:02,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 05:53:02,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 05:53:02,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 05:53:02,164 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2022-07-14 05:53:02,197 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 05:53:02,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 05:53:02,198 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 05:53:02,198 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 05:53:02,199 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 05:53:02,199 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 05:53:02,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 05:53:02,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 05:53:02,200 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 05:53:02,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 05:53:02,201 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 05:53:02,201 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 05:53:02,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 05:53:02,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 05:53:02,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 05:53:02,202 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 05:53:02,202 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 05:53:02,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 05:53:02,203 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 05:53:02,203 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-14 05:53:02,203 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-14 05:53:02,203 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 05:53:02,204 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 05:53:02,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 05:53:02,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 05:53:02,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 05:53:02,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 05:53:02,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 05:53:02,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 05:53:02,205 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-14 05:53:02,205 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-14 05:53:02,206 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-14 05:53:02,206 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2022-07-14 05:53:02,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 05:53:02,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 05:53:02,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 05:53:02,505 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 05:53:02,505 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 05:53:02,506 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_max.c [2022-07-14 05:53:02,561 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/266d57a92/81fd4895609b4271b1ace9b88c1195c8/FLAG34c246504 [2022-07-14 05:53:03,023 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 05:53:03,024 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c [2022-07-14 05:53:03,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/266d57a92/81fd4895609b4271b1ace9b88c1195c8/FLAG34c246504 [2022-07-14 05:53:03,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/266d57a92/81fd4895609b4271b1ace9b88c1195c8 [2022-07-14 05:53:03,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 05:53:03,052 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 05:53:03,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 05:53:03,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 05:53:03,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 05:53:03,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 05:53:03" (1/1) ... [2022-07-14 05:53:03,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a2805df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:53:03, skipping insertion in model container [2022-07-14 05:53:03,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 05:53:03" (1/1) ... [2022-07-14 05:53:03,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 05:53:03,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 05:53:03,198 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2022-07-14 05:53:03,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 05:53:03,247 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-14 05:53:03,253 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 05:53:03,256 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2022-07-14 05:53:03,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 05:53:03,273 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 05:53:03,290 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2022-07-14 05:53:03,301 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 05:53:03,322 INFO L208 MainTranslator]: Completed translation [2022-07-14 05:53:03,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:53:03 WrapperNode [2022-07-14 05:53:03,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 05:53:03,324 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 05:53:03,324 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 05:53:03,324 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 05:53:03,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:53:03" (1/1) ... [2022-07-14 05:53:03,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:53:03" (1/1) ... [2022-07-14 05:53:03,355 INFO L137 Inliner]: procedures = 26, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 37 [2022-07-14 05:53:03,356 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 05:53:03,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 05:53:03,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 05:53:03,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 05:53:03,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:53:03" (1/1) ... [2022-07-14 05:53:03,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:53:03" (1/1) ... [2022-07-14 05:53:03,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:53:03" (1/1) ... [2022-07-14 05:53:03,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:53:03" (1/1) ... [2022-07-14 05:53:03,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:53:03" (1/1) ... [2022-07-14 05:53:03,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:53:03" (1/1) ... [2022-07-14 05:53:03,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:53:03" (1/1) ... [2022-07-14 05:53:03,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 05:53:03,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 05:53:03,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 05:53:03,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 05:53:03,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:53:03" (1/1) ... [2022-07-14 05:53:03,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 05:53:03,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:53:03,446 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) [2022-07-14 05:53:03,461 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 [2022-07-14 05:53:03,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 05:53:03,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-14 05:53:03,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 05:53:03,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-14 05:53:03,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 05:53:03,490 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-07-14 05:53:03,490 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-07-14 05:53:03,490 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-07-14 05:53:03,490 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-07-14 05:53:03,490 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-07-14 05:53:03,490 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-07-14 05:53:03,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 05:53:03,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 05:53:03,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 05:53:03,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-14 05:53:03,580 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 05:53:03,582 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 05:53:03,920 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 05:53:03,926 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 05:53:03,926 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-14 05:53:03,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 05:53:03 BoogieIcfgContainer [2022-07-14 05:53:03,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 05:53:03,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 05:53:03,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 05:53:03,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 05:53:03,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 05:53:03" (1/3) ... [2022-07-14 05:53:03,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed4a808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 05:53:03, skipping insertion in model container [2022-07-14 05:53:03,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:53:03" (2/3) ... [2022-07-14 05:53:03,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed4a808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 05:53:03, skipping insertion in model container [2022-07-14 05:53:03,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 05:53:03" (3/3) ... [2022-07-14 05:53:03,944 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_max.c [2022-07-14 05:53:03,955 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 05:53:03,955 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-07-14 05:53:04,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 05:53:04,021 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=FINITE_AUTOMATA, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@64c07662, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@37fba154 [2022-07-14 05:53:04,022 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-07-14 05:53:04,026 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 59 states have internal predecessors, (66), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 05:53:04,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-14 05:53:04,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:53:04,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-14 05:53:04,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:53:04,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:53:04,037 INFO L85 PathProgramCache]: Analyzing trace with hash 73597257, now seen corresponding path program 1 times [2022-07-14 05:53:04,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:53:04,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241561289] [2022-07-14 05:53:04,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:53:04,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:53:04,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:53:04,055 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:53:04,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-14 05:53:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:53:04,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 05:53:04,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:53:04,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:53:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:53:04,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 05:53:04,249 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:53:04,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241561289] [2022-07-14 05:53:04,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241561289] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:53:04,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:53:04,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 05:53:04,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574016388] [2022-07-14 05:53:04,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:53:04,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 05:53:04,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:53:04,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 05:53:04,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 05:53:04,284 INFO L87 Difference]: Start difference. First operand has 72 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 59 states have internal predecessors, (66), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:53:04,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:53:04,388 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-07-14 05:53:04,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 05:53:04,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-07-14 05:53:04,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:53:04,397 INFO L225 Difference]: With dead ends: 73 [2022-07-14 05:53:04,398 INFO L226 Difference]: Without dead ends: 71 [2022-07-14 05:53:04,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 05:53:04,402 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 6 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:53:04,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 133 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:53:04,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-14 05:53:04,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-07-14 05:53:04,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 38 states have (on average 1.631578947368421) internal successors, (62), 56 states have internal predecessors, (62), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 05:53:04,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2022-07-14 05:53:04,436 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 5 [2022-07-14 05:53:04,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:53:04,437 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2022-07-14 05:53:04,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:53:04,437 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2022-07-14 05:53:04,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-14 05:53:04,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:53:04,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-14 05:53:04,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-14 05:53:04,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 05:53:04,647 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:53:04,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:53:04,648 INFO L85 PathProgramCache]: Analyzing trace with hash 73597258, now seen corresponding path program 1 times [2022-07-14 05:53:04,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:53:04,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160871047] [2022-07-14 05:53:04,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:53:04,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:53:04,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:53:04,651 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:53:04,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-14 05:53:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:53:04,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 05:53:04,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:53:04,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:53:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:53:04,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 05:53:04,734 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:53:04,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160871047] [2022-07-14 05:53:04,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160871047] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:53:04,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:53:04,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 05:53:04,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128769201] [2022-07-14 05:53:04,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:53:04,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 05:53:04,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:53:04,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 05:53:04,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 05:53:04,743 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:53:04,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:53:04,830 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2022-07-14 05:53:04,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 05:53:04,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-07-14 05:53:04,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:53:04,834 INFO L225 Difference]: With dead ends: 68 [2022-07-14 05:53:04,834 INFO L226 Difference]: Without dead ends: 68 [2022-07-14 05:53:04,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 05:53:04,835 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 2 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:53:04,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 132 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:53:04,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-14 05:53:04,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-07-14 05:53:04,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 38 states have (on average 1.605263157894737) internal successors, (61), 55 states have internal predecessors, (61), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 05:53:04,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-07-14 05:53:04,857 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 5 [2022-07-14 05:53:04,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:53:04,857 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-07-14 05:53:04,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:53:04,858 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-07-14 05:53:04,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 05:53:04,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:53:04,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:53:04,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-14 05:53:05,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 05:53:05,067 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:53:05,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:53:05,068 INFO L85 PathProgramCache]: Analyzing trace with hash -345289291, now seen corresponding path program 1 times [2022-07-14 05:53:05,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:53:05,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873795389] [2022-07-14 05:53:05,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:53:05,069 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:53:05,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:53:05,070 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:53:05,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-14 05:53:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:53:05,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 05:53:05,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:53:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:53:05,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 05:53:05,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:53:05,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873795389] [2022-07-14 05:53:05,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873795389] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:53:05,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:53:05,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 05:53:05,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43512208] [2022-07-14 05:53:05,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:53:05,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 05:53:05,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:53:05,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 05:53:05,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 05:53:05,194 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 05:53:05,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:53:05,296 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2022-07-14 05:53:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 05:53:05,297 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-14 05:53:05,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:53:05,298 INFO L225 Difference]: With dead ends: 83 [2022-07-14 05:53:05,298 INFO L226 Difference]: Without dead ends: 83 [2022-07-14 05:53:05,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-14 05:53:05,300 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 11 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:53:05,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 432 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:53:05,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-14 05:53:05,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2022-07-14 05:53:05,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 61 states have internal predecessors, (66), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2022-07-14 05:53:05,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2022-07-14 05:53:05,320 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 11 [2022-07-14 05:53:05,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:53:05,321 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2022-07-14 05:53:05,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 05:53:05,322 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2022-07-14 05:53:05,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 05:53:05,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:53:05,322 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:53:05,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-14 05:53:05,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 05:53:05,533 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:53:05,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:53:05,534 INFO L85 PathProgramCache]: Analyzing trace with hash -159104294, now seen corresponding path program 1 times [2022-07-14 05:53:05,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:53:05,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906566012] [2022-07-14 05:53:05,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:53:05,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:53:05,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:53:05,536 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:53:05,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-14 05:53:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:53:05,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 05:53:05,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:53:05,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:53:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:53:05,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 05:53:05,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:53:05,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906566012] [2022-07-14 05:53:05,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906566012] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:53:05,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:53:05,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 05:53:05,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673995732] [2022-07-14 05:53:05,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:53:05,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 05:53:05,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:53:05,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 05:53:05,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 05:53:05,649 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 05:53:05,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:53:05,847 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-07-14 05:53:05,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 05:53:05,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-14 05:53:05,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:53:05,849 INFO L225 Difference]: With dead ends: 80 [2022-07-14 05:53:05,849 INFO L226 Difference]: Without dead ends: 80 [2022-07-14 05:53:05,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 05:53:05,850 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 49 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:53:05,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 72 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 05:53:05,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-14 05:53:05,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2022-07-14 05:53:05,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 61 states have internal predecessors, (70), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2022-07-14 05:53:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2022-07-14 05:53:05,857 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 11 [2022-07-14 05:53:05,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:53:05,857 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2022-07-14 05:53:05,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 05:53:05,858 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2022-07-14 05:53:05,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 05:53:05,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:53:05,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:53:05,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-14 05:53:06,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 05:53:06,068 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:53:06,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:53:06,069 INFO L85 PathProgramCache]: Analyzing trace with hash -159104293, now seen corresponding path program 1 times [2022-07-14 05:53:06,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:53:06,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049016374] [2022-07-14 05:53:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:53:06,070 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:53:06,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:53:06,071 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:53:06,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-14 05:53:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:53:06,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 05:53:06,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:53:06,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:53:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:53:06,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 05:53:06,194 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:53:06,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049016374] [2022-07-14 05:53:06,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049016374] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:53:06,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:53:06,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 05:53:06,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259887445] [2022-07-14 05:53:06,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:53:06,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 05:53:06,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:53:06,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 05:53:06,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 05:53:06,196 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 05:53:06,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:53:06,415 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2022-07-14 05:53:06,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 05:53:06,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-14 05:53:06,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:53:06,416 INFO L225 Difference]: With dead ends: 84 [2022-07-14 05:53:06,416 INFO L226 Difference]: Without dead ends: 84 [2022-07-14 05:53:06,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 05:53:06,417 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 47 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:53:06,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 83 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 05:53:06,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-14 05:53:06,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2022-07-14 05:53:06,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 63 states have internal predecessors, (71), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-14 05:53:06,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2022-07-14 05:53:06,423 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 11 [2022-07-14 05:53:06,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:53:06,423 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2022-07-14 05:53:06,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 05:53:06,424 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2022-07-14 05:53:06,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-14 05:53:06,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:53:06,424 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:53:06,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-14 05:53:06,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 05:53:06,636 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:53:06,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:53:06,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1041946460, now seen corresponding path program 1 times [2022-07-14 05:53:06,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:53:06,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370445495] [2022-07-14 05:53:06,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:53:06,637 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:53:06,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:53:06,638 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:53:06,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-14 05:53:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:53:06,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 05:53:06,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:53:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:53:06,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 05:53:06,777 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:53:06,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370445495] [2022-07-14 05:53:06,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370445495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:53:06,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:53:06,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 05:53:06,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160615685] [2022-07-14 05:53:06,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:53:06,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 05:53:06,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:53:06,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 05:53:06,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 05:53:06,780 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 05:53:06,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:53:06,874 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2022-07-14 05:53:06,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 05:53:06,875 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-07-14 05:53:06,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:53:06,876 INFO L225 Difference]: With dead ends: 92 [2022-07-14 05:53:06,876 INFO L226 Difference]: Without dead ends: 92 [2022-07-14 05:53:06,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-14 05:53:06,877 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 10 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:53:06,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 432 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:53:06,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-14 05:53:06,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2022-07-14 05:53:06,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 67 states have internal predecessors, (75), 12 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (16), 14 states have call predecessors, (16), 12 states have call successors, (16) [2022-07-14 05:53:06,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2022-07-14 05:53:06,888 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 17 [2022-07-14 05:53:06,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:53:06,888 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2022-07-14 05:53:06,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 05:53:06,889 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2022-07-14 05:53:06,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-14 05:53:06,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:53:06,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:53:06,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-14 05:53:07,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 05:53:07,099 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:53:07,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:53:07,100 INFO L85 PathProgramCache]: Analyzing trace with hash -868680531, now seen corresponding path program 1 times [2022-07-14 05:53:07,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:53:07,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146069650] [2022-07-14 05:53:07,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:53:07,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:53:07,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:53:07,102 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:53:07,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-14 05:53:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:53:07,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 05:53:07,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:53:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:53:07,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 05:53:07,176 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:53:07,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146069650] [2022-07-14 05:53:07,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146069650] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:53:07,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:53:07,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 05:53:07,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682372996] [2022-07-14 05:53:07,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:53:07,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 05:53:07,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:53:07,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 05:53:07,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 05:53:07,178 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 05:53:07,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:53:07,335 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2022-07-14 05:53:07,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 05:53:07,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2022-07-14 05:53:07,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:53:07,337 INFO L225 Difference]: With dead ends: 89 [2022-07-14 05:53:07,337 INFO L226 Difference]: Without dead ends: 75 [2022-07-14 05:53:07,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 05:53:07,338 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 42 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:53:07,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 82 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 05:53:07,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-14 05:53:07,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-07-14 05:53:07,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 43 states have (on average 1.558139534883721) internal successors, (67), 59 states have internal predecessors, (67), 10 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2022-07-14 05:53:07,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2022-07-14 05:53:07,344 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 20 [2022-07-14 05:53:07,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:53:07,344 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2022-07-14 05:53:07,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 05:53:07,344 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2022-07-14 05:53:07,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 05:53:07,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:53:07,345 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:53:07,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-14 05:53:07,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 05:53:07,546 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:53:07,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:53:07,546 INFO L85 PathProgramCache]: Analyzing trace with hash -360622958, now seen corresponding path program 1 times [2022-07-14 05:53:07,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:53:07,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279915407] [2022-07-14 05:53:07,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:53:07,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:53:07,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:53:07,548 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:53:07,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-14 05:53:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:53:07,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 05:53:07,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:53:07,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:53:07,931 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 05:53:07,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 25 [2022-07-14 05:53:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 05:53:07,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:53:08,088 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:53:08,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279915407] [2022-07-14 05:53:08,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279915407] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:53:08,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [284542044] [2022-07-14 05:53:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:53:08,089 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 05:53:08,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 05:53:08,095 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 05:53:08,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-07-14 05:53:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:53:08,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 05:53:08,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:53:08,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:53:10,365 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 05:53:10,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 17 [2022-07-14 05:53:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 05:53:10,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:53:10,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [284542044] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:53:10,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 05:53:10,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-07-14 05:53:10,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304593147] [2022-07-14 05:53:10,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 05:53:10,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 05:53:10,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:53:10,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 05:53:10,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=27, Unknown=1, NotChecked=0, Total=42 [2022-07-14 05:53:10,485 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 05:53:16,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:53:16,734 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2022-07-14 05:53:16,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 05:53:16,736 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 29 [2022-07-14 05:53:16,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:53:16,737 INFO L225 Difference]: With dead ends: 84 [2022-07-14 05:53:16,737 INFO L226 Difference]: Without dead ends: 84 [2022-07-14 05:53:16,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=26, Invalid=44, Unknown=2, NotChecked=0, Total=72 [2022-07-14 05:53:16,738 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 46 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:53:16,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 102 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 96 Invalid, 0 Unknown, 157 Unchecked, 0.2s Time] [2022-07-14 05:53:16,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-14 05:53:16,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2022-07-14 05:53:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 62 states have internal predecessors, (71), 10 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (17), 13 states have call predecessors, (17), 10 states have call successors, (17) [2022-07-14 05:53:16,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2022-07-14 05:53:16,746 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 29 [2022-07-14 05:53:16,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:53:16,747 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2022-07-14 05:53:16,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 05:53:16,747 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2022-07-14 05:53:16,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 05:53:16,748 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:53:16,748 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:53:16,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-14 05:53:16,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-07-14 05:53:17,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 05:53:17,152 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:53:17,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:53:17,153 INFO L85 PathProgramCache]: Analyzing trace with hash -360622957, now seen corresponding path program 1 times [2022-07-14 05:53:17,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:53:17,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826406431] [2022-07-14 05:53:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:53:17,153 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:53:17,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:53:17,154 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:53:17,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-14 05:53:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:53:17,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 05:53:17,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:53:17,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:53:17,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:53:21,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:53:21,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 05:53:21,547 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 05:53:21,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 12 [2022-07-14 05:53:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 05:53:21,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:53:23,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:53:23,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826406431] [2022-07-14 05:53:23,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826406431] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:53:23,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1040418821] [2022-07-14 05:53:23,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:53:23,860 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 05:53:23,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 05:53:23,862 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 05:53:23,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-07-14 05:53:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:53:24,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 05:53:24,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:53:24,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:53:24,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:53:30,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:53:30,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 05:53:30,297 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 05:53:30,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 12 [2022-07-14 05:53:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 05:53:30,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:53:32,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1040418821] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:53:32,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 05:53:32,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-14 05:53:32,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100462723] [2022-07-14 05:53:32,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 05:53:32,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 05:53:32,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:53:32,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 05:53:32,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=51, Unknown=1, NotChecked=0, Total=72 [2022-07-14 05:53:32,629 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 05:53:32,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:53:32,917 INFO L93 Difference]: Finished difference Result 98 states and 130 transitions. [2022-07-14 05:53:32,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 05:53:32,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-07-14 05:53:32,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:53:32,921 INFO L225 Difference]: With dead ends: 98 [2022-07-14 05:53:32,921 INFO L226 Difference]: Without dead ends: 98 [2022-07-14 05:53:32,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=27, Invalid=62, Unknown=1, NotChecked=0, Total=90 [2022-07-14 05:53:32,922 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 99 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:53:32,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 101 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 111 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-07-14 05:53:32,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-14 05:53:32,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2022-07-14 05:53:32,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 74 states have internal predecessors, (82), 13 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (26), 16 states have call predecessors, (26), 13 states have call successors, (26) [2022-07-14 05:53:32,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2022-07-14 05:53:32,930 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 29 [2022-07-14 05:53:32,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:53:32,931 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2022-07-14 05:53:32,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 05:53:32,931 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2022-07-14 05:53:32,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 05:53:32,932 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:53:32,932 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:53:32,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-14 05:53:33,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-07-14 05:53:33,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 05:53:33,345 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:53:33,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:53:33,346 INFO L85 PathProgramCache]: Analyzing trace with hash -694882647, now seen corresponding path program 1 times [2022-07-14 05:53:33,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:53:33,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1033582278] [2022-07-14 05:53:33,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:53:33,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:53:33,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:53:33,347 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:53:33,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-14 05:53:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:53:33,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 05:53:33,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:53:33,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:53:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 05:53:33,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:53:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 05:53:33,727 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:53:33,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1033582278] [2022-07-14 05:53:33,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1033582278] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:53:33,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 05:53:33,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-14 05:53:33,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883755124] [2022-07-14 05:53:33,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 05:53:33,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 05:53:33,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:53:33,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 05:53:33,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-14 05:53:33,729 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-14 05:53:34,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:53:34,126 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2022-07-14 05:53:34,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 05:53:34,127 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 25 [2022-07-14 05:53:34,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:53:34,131 INFO L225 Difference]: With dead ends: 116 [2022-07-14 05:53:34,131 INFO L226 Difference]: Without dead ends: 114 [2022-07-14 05:53:34,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-14 05:53:34,132 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 52 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 05:53:34,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 302 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 288 Invalid, 0 Unknown, 92 Unchecked, 0.4s Time] [2022-07-14 05:53:34,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-14 05:53:34,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2022-07-14 05:53:34,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 69 states have (on average 1.4202898550724639) internal successors, (98), 83 states have internal predecessors, (98), 15 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (28), 18 states have call predecessors, (28), 15 states have call successors, (28) [2022-07-14 05:53:34,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 141 transitions. [2022-07-14 05:53:34,155 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 141 transitions. Word has length 25 [2022-07-14 05:53:34,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:53:34,155 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 141 transitions. [2022-07-14 05:53:34,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-14 05:53:34,155 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 141 transitions. [2022-07-14 05:53:34,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 05:53:34,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:53:34,158 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:53:34,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-14 05:53:34,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 05:53:34,368 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:53:34,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:53:34,369 INFO L85 PathProgramCache]: Analyzing trace with hash -694882646, now seen corresponding path program 1 times [2022-07-14 05:53:34,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:53:34,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115845464] [2022-07-14 05:53:34,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:53:34,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:53:34,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:53:34,371 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:53:34,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-14 05:53:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:53:34,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 05:53:34,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:53:34,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:53:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 05:53:34,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:53:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 05:53:35,714 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:53:35,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115845464] [2022-07-14 05:53:35,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115845464] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:53:35,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 05:53:35,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-07-14 05:53:35,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473057796] [2022-07-14 05:53:35,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 05:53:35,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-14 05:53:35,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:53:35,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-14 05:53:35,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-07-14 05:53:35,715 INFO L87 Difference]: Start difference. First operand 108 states and 141 transitions. Second operand has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 05:53:36,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:53:36,987 INFO L93 Difference]: Finished difference Result 133 states and 176 transitions. [2022-07-14 05:53:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 05:53:36,992 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2022-07-14 05:53:36,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:53:36,994 INFO L225 Difference]: With dead ends: 133 [2022-07-14 05:53:36,994 INFO L226 Difference]: Without dead ends: 133 [2022-07-14 05:53:36,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-07-14 05:53:36,995 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 62 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:53:36,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 464 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 440 Invalid, 0 Unknown, 90 Unchecked, 1.1s Time] [2022-07-14 05:53:36,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-14 05:53:37,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 124. [2022-07-14 05:53:37,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 81 states have (on average 1.3950617283950617) internal successors, (113), 95 states have internal predecessors, (113), 18 states have call successors, (18), 7 states have call predecessors, (18), 9 states have return successors, (31), 21 states have call predecessors, (31), 18 states have call successors, (31) [2022-07-14 05:53:37,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 162 transitions. [2022-07-14 05:53:37,002 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 162 transitions. Word has length 25 [2022-07-14 05:53:37,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:53:37,002 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 162 transitions. [2022-07-14 05:53:37,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 05:53:37,003 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 162 transitions. [2022-07-14 05:53:37,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-14 05:53:37,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:53:37,004 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:53:37,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-14 05:53:37,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 05:53:37,213 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:53:37,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:53:37,214 INFO L85 PathProgramCache]: Analyzing trace with hash 986137240, now seen corresponding path program 1 times [2022-07-14 05:53:37,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:53:37,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116875369] [2022-07-14 05:53:37,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:53:37,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:53:37,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:53:37,215 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:53:37,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-14 05:53:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:53:37,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 05:53:37,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:53:37,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-14 05:53:37,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 05:53:37,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:53:37,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116875369] [2022-07-14 05:53:37,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116875369] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:53:37,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:53:37,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-14 05:53:37,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793370979] [2022-07-14 05:53:37,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:53:37,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 05:53:37,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:53:37,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 05:53:37,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-14 05:53:37,375 INFO L87 Difference]: Start difference. First operand 124 states and 162 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-14 05:53:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:53:37,599 INFO L93 Difference]: Finished difference Result 130 states and 171 transitions. [2022-07-14 05:53:37,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 05:53:37,601 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2022-07-14 05:53:37,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:53:37,602 INFO L225 Difference]: With dead ends: 130 [2022-07-14 05:53:37,603 INFO L226 Difference]: Without dead ends: 126 [2022-07-14 05:53:37,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-14 05:53:37,603 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 29 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:53:37,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 357 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 05:53:37,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-14 05:53:37,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2022-07-14 05:53:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 81 states have (on average 1.3703703703703705) internal successors, (111), 95 states have internal predecessors, (111), 18 states have call successors, (18), 7 states have call predecessors, (18), 9 states have return successors, (31), 21 states have call predecessors, (31), 18 states have call successors, (31) [2022-07-14 05:53:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2022-07-14 05:53:37,610 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 31 [2022-07-14 05:53:37,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:53:37,610 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2022-07-14 05:53:37,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-14 05:53:37,611 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2022-07-14 05:53:37,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-14 05:53:37,612 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:53:37,612 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:53:37,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-14 05:53:37,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 05:53:37,821 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:53:37,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:53:37,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1746105865, now seen corresponding path program 1 times [2022-07-14 05:53:37,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:53:37,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227950445] [2022-07-14 05:53:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:53:37,822 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:53:37,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:53:37,825 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:53:37,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-14 05:53:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:53:37,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-14 05:53:37,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:53:37,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-07-14 05:53:37,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-07-14 05:53:38,090 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-14 05:53:38,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 22 [2022-07-14 05:53:38,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:53:38,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 22 [2022-07-14 05:53:38,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-07-14 05:53:38,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-07-14 05:53:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 05:53:38,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:53:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 05:53:39,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:53:39,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227950445] [2022-07-14 05:53:39,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227950445] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:53:39,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 05:53:39,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2022-07-14 05:53:39,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863815534] [2022-07-14 05:53:39,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 05:53:39,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-14 05:53:39,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:53:39,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-14 05:53:39,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-07-14 05:53:39,106 INFO L87 Difference]: Start difference. First operand 124 states and 160 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 05:53:39,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:53:39,829 INFO L93 Difference]: Finished difference Result 139 states and 178 transitions. [2022-07-14 05:53:39,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 05:53:39,829 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-07-14 05:53:39,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:53:39,830 INFO L225 Difference]: With dead ends: 139 [2022-07-14 05:53:39,830 INFO L226 Difference]: Without dead ends: 139 [2022-07-14 05:53:39,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-07-14 05:53:39,831 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 38 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 05:53:39,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 806 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 296 Invalid, 0 Unknown, 89 Unchecked, 0.5s Time] [2022-07-14 05:53:39,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-14 05:53:39,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2022-07-14 05:53:39,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 86 states have (on average 1.3604651162790697) internal successors, (117), 100 states have internal predecessors, (117), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (31), 21 states have call predecessors, (31), 18 states have call successors, (31) [2022-07-14 05:53:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 166 transitions. [2022-07-14 05:53:39,838 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 166 transitions. Word has length 31 [2022-07-14 05:53:39,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:53:39,838 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 166 transitions. [2022-07-14 05:53:39,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 05:53:39,839 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 166 transitions. [2022-07-14 05:53:39,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-14 05:53:39,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:53:39,839 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-14 05:53:39,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-14 05:53:40,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 05:53:40,049 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:53:40,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:53:40,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1427695233, now seen corresponding path program 1 times [2022-07-14 05:53:40,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:53:40,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211528224] [2022-07-14 05:53:40,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:53:40,051 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:53:40,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:53:40,058 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:53:40,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-14 05:53:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:53:40,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 05:53:40,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:53:40,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:53:40,363 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 05:53:40,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 25 [2022-07-14 05:53:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 05:53:40,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:53:40,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:53:40,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211528224] [2022-07-14 05:53:40,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211528224] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:53:40,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [300793613] [2022-07-14 05:53:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:53:40,505 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 05:53:40,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 05:53:40,508 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 05:53:40,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-07-14 05:53:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:53:40,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 05:53:40,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:53:40,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:53:42,770 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 05:53:42,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 17 [2022-07-14 05:53:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 05:53:42,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:53:42,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [300793613] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:53:42,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 05:53:42,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-07-14 05:53:42,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115384987] [2022-07-14 05:53:42,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 05:53:42,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 05:53:42,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:53:42,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 05:53:42,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=27, Unknown=1, NotChecked=0, Total=42 [2022-07-14 05:53:42,881 INFO L87 Difference]: Start difference. First operand 131 states and 166 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-14 05:53:49,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:53:49,084 INFO L93 Difference]: Finished difference Result 133 states and 168 transitions. [2022-07-14 05:53:49,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 05:53:49,085 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 31 [2022-07-14 05:53:49,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:53:49,086 INFO L225 Difference]: With dead ends: 133 [2022-07-14 05:53:49,086 INFO L226 Difference]: Without dead ends: 133 [2022-07-14 05:53:49,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=26, Invalid=44, Unknown=2, NotChecked=0, Total=72 [2022-07-14 05:53:49,087 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 44 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:53:49,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 100 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 92 Invalid, 0 Unknown, 160 Unchecked, 0.1s Time] [2022-07-14 05:53:49,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-14 05:53:49,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2022-07-14 05:53:49,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 86 states have (on average 1.3604651162790697) internal successors, (117), 100 states have internal predecessors, (117), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (31), 21 states have call predecessors, (31), 18 states have call successors, (31) [2022-07-14 05:53:49,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 166 transitions. [2022-07-14 05:53:49,093 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 166 transitions. Word has length 31 [2022-07-14 05:53:49,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:53:49,093 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 166 transitions. [2022-07-14 05:53:49,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-14 05:53:49,094 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 166 transitions. [2022-07-14 05:53:49,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-14 05:53:49,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:53:49,095 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-14 05:53:49,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-14 05:53:49,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-07-14 05:53:49,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 05:53:49,505 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:53:49,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:53:49,505 INFO L85 PathProgramCache]: Analyzing trace with hash -592661436, now seen corresponding path program 1 times [2022-07-14 05:53:49,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:53:49,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113607874] [2022-07-14 05:53:49,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:53:49,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:53:49,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:53:49,511 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:53:49,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-14 05:53:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:53:49,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 05:53:49,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:53:49,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:53:49,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:53:53,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:53:53,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 05:53:53,933 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 05:53:53,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 12 [2022-07-14 05:53:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-14 05:53:53,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:53:56,274 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:53:56,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113607874] [2022-07-14 05:53:56,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113607874] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:53:56,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [529245077] [2022-07-14 05:53:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:53:56,275 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 05:53:56,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 05:53:56,276 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 05:53:56,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-07-14 05:53:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:53:56,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 05:53:56,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:53:56,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:53:56,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:54:02,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:54:02,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 05:54:02,725 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 05:54:02,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 12 [2022-07-14 05:54:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-14 05:54:02,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:54:04,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [529245077] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:54:04,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 05:54:04,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-14 05:54:04,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059579101] [2022-07-14 05:54:04,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 05:54:04,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 05:54:04,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:54:04,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 05:54:04,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=51, Unknown=1, NotChecked=0, Total=72 [2022-07-14 05:54:04,978 INFO L87 Difference]: Start difference. First operand 131 states and 166 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 05:54:05,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:54:05,278 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2022-07-14 05:54:05,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 05:54:05,278 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-07-14 05:54:05,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:54:05,280 INFO L225 Difference]: With dead ends: 135 [2022-07-14 05:54:05,280 INFO L226 Difference]: Without dead ends: 135 [2022-07-14 05:54:05,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=27, Invalid=62, Unknown=1, NotChecked=0, Total=90 [2022-07-14 05:54:05,281 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 44 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 05:54:05,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 112 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 171 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-07-14 05:54:05,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-14 05:54:05,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-07-14 05:54:05,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 86 states have (on average 1.3604651162790697) internal successors, (117), 100 states have internal predecessors, (117), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (31), 21 states have call predecessors, (31), 18 states have call successors, (31) [2022-07-14 05:54:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 166 transitions. [2022-07-14 05:54:05,287 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 166 transitions. Word has length 35 [2022-07-14 05:54:05,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:54:05,287 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 166 transitions. [2022-07-14 05:54:05,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 05:54:05,288 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 166 transitions. [2022-07-14 05:54:05,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-14 05:54:05,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:54:05,289 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2022-07-14 05:54:05,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-07-14 05:54:05,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-14 05:54:05,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 05:54:05,693 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:54:05,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:54:05,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1805515892, now seen corresponding path program 2 times [2022-07-14 05:54:05,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:54:05,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230281875] [2022-07-14 05:54:05,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:54:05,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:54:05,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:54:05,696 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:54:05,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-14 05:54:05,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 05:54:05,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:54:05,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 05:54:05,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:54:05,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:54:10,114 INFO L356 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2022-07-14 05:54:10,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4 case distinctions, treesize of input 21 treesize of output 37 [2022-07-14 05:54:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 41 proven. 27 refuted. 3 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-14 05:54:10,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:54:12,324 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:54:12,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230281875] [2022-07-14 05:54:12,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230281875] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:54:12,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [972912963] [2022-07-14 05:54:12,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:54:12,325 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 05:54:12,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 05:54:12,326 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 05:54:12,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-07-14 05:54:12,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 05:54:12,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422485025] [2022-07-14 05:54:12,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:54:12,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:54:12,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:54:12,529 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 05:54:12,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 1 [2022-07-14 05:54:12,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-14 05:54:12,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 05:54:12,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:54:12,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 05:54:12,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:54:12,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:54:23,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:54:23,121 INFO L356 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2022-07-14 05:54:23,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 29 [2022-07-14 05:54:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-14 05:54:23,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:54:23,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422485025] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:54:23,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 05:54:23,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2022-07-14 05:54:23,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549560329] [2022-07-14 05:54:23,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 05:54:23,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 05:54:23,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:54:23,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 05:54:23,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=96, Unknown=5, NotChecked=0, Total=132 [2022-07-14 05:54:23,322 INFO L87 Difference]: Start difference. First operand 131 states and 166 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-14 05:54:36,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:54:36,766 INFO L93 Difference]: Finished difference Result 169 states and 224 transitions. [2022-07-14 05:54:36,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 05:54:36,767 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 49 [2022-07-14 05:54:36,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:54:36,768 INFO L225 Difference]: With dead ends: 169 [2022-07-14 05:54:36,768 INFO L226 Difference]: Without dead ends: 169 [2022-07-14 05:54:36,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=58, Invalid=144, Unknown=8, NotChecked=0, Total=210 [2022-07-14 05:54:36,769 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 48 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 399 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:54:36,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 170 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 87 Invalid, 0 Unknown, 399 Unchecked, 0.2s Time] [2022-07-14 05:54:36,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-14 05:54:36,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2022-07-14 05:54:36,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 112 states have (on average 1.3125) internal successors, (147), 127 states have internal predecessors, (147), 23 states have call successors, (23), 12 states have call predecessors, (23), 17 states have return successors, (54), 28 states have call predecessors, (54), 23 states have call successors, (54) [2022-07-14 05:54:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 224 transitions. [2022-07-14 05:54:36,777 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 224 transitions. Word has length 49 [2022-07-14 05:54:36,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:54:36,778 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 224 transitions. [2022-07-14 05:54:36,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-14 05:54:36,778 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 224 transitions. [2022-07-14 05:54:36,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-14 05:54:36,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:54:36,779 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2022-07-14 05:54:36,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-14 05:54:36,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-14 05:54:37,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:54:37,180 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:54:37,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:54:37,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1805515893, now seen corresponding path program 2 times [2022-07-14 05:54:37,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:54:37,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942778948] [2022-07-14 05:54:37,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:54:37,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:54:37,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:54:37,182 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:54:37,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-14 05:54:37,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 05:54:37,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:54:37,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-14 05:54:37,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:54:37,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:54:37,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:54:39,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:54:39,710 INFO L356 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-07-14 05:54:39,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-07-14 05:54:39,724 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 05:54:39,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 12 [2022-07-14 05:54:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 41 proven. 34 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 05:54:39,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:54:41,972 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1135 (_ BitVec 32)) (v_nondet_tree_~n~0.base_87 (_ BitVec 32)) (v_nondet_tree_~n~0.base_86 (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv8 32) c_nondet_tree_~n~0.offset))) (and (bvule .cse0 (select (store (store |c_#length| v_nondet_tree_~n~0.base_86 v_ArrVal_1135) v_nondet_tree_~n~0.base_87 (_ bv12 32)) c_nondet_tree_~n~0.base)) (bvule (bvadd (_ bv4 32) c_nondet_tree_~n~0.offset) .cse0))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_nondet_tree_~n~0.base_86)))))) is different from false [2022-07-14 05:54:41,977 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:54:41,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942778948] [2022-07-14 05:54:41,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942778948] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:54:41,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1503827419] [2022-07-14 05:54:41,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:54:41,977 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 05:54:41,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 05:54:41,978 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 05:54:41,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-07-14 05:54:42,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 05:54:42,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:54:42,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-14 05:54:42,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:54:42,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:54:42,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:54:46,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:54:46,477 INFO L356 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-07-14 05:54:46,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-07-14 05:54:46,493 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 05:54:46,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 12 [2022-07-14 05:54:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 41 proven. 34 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 05:54:46,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:54:48,705 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.base_98 (_ BitVec 32)) (v_nondet_tree_~n~0.base_97 (_ BitVec 32)) (v_ArrVal_1241 (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv8 32) c_nondet_tree_~n~0.offset))) (and (bvule .cse0 (select (store (store |c_#length| v_nondet_tree_~n~0.base_97 v_ArrVal_1241) v_nondet_tree_~n~0.base_98 (_ bv12 32)) c_nondet_tree_~n~0.base)) (bvule (bvadd (_ bv4 32) c_nondet_tree_~n~0.offset) .cse0))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_nondet_tree_~n~0.base_97)))))) is different from false [2022-07-14 05:54:48,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1503827419] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:54:48,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 05:54:48,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-14 05:54:48,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134549627] [2022-07-14 05:54:48,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 05:54:48,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 05:54:48,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:54:48,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 05:54:48,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=70, Unknown=3, NotChecked=34, Total=132 [2022-07-14 05:54:48,711 INFO L87 Difference]: Start difference. First operand 168 states and 224 transitions. Second operand has 9 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 05:54:56,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:54:56,565 INFO L93 Difference]: Finished difference Result 210 states and 286 transitions. [2022-07-14 05:54:56,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 05:54:56,566 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2022-07-14 05:54:56,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:54:56,567 INFO L225 Difference]: With dead ends: 210 [2022-07-14 05:54:56,568 INFO L226 Difference]: Without dead ends: 210 [2022-07-14 05:54:56,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=50, Invalid=109, Unknown=5, NotChecked=46, Total=210 [2022-07-14 05:54:56,568 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 46 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 05:54:56,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 159 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 156 Invalid, 0 Unknown, 231 Unchecked, 0.3s Time] [2022-07-14 05:54:56,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-14 05:54:56,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-07-14 05:54:56,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 141 states have (on average 1.2695035460992907) internal successors, (179), 159 states have internal predecessors, (179), 29 states have call successors, (29), 16 states have call predecessors, (29), 24 states have return successors, (78), 34 states have call predecessors, (78), 29 states have call successors, (78) [2022-07-14 05:54:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 286 transitions. [2022-07-14 05:54:56,578 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 286 transitions. Word has length 49 [2022-07-14 05:54:56,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:54:56,579 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 286 transitions. [2022-07-14 05:54:56,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 05:54:56,579 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 286 transitions. [2022-07-14 05:54:56,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-14 05:54:56,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:54:56,580 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:54:56,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-07-14 05:54:56,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-14 05:54:56,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 05:54:56,984 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:54:56,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:54:56,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1738803102, now seen corresponding path program 2 times [2022-07-14 05:54:56,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:54:56,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541044908] [2022-07-14 05:54:56,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:54:56,985 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:54:56,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:54:56,986 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:54:56,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-14 05:54:57,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 05:54:57,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:54:57,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 05:54:57,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:54:57,283 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 05:54:57,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:54:57,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 18 [2022-07-14 05:54:58,172 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 05:54:58,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:54:58,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541044908] [2022-07-14 05:54:58,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541044908] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:54:58,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 05:54:58,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-14 05:54:58,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16325973] [2022-07-14 05:54:58,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 05:54:58,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-14 05:54:58,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:54:58,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-14 05:54:58,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-07-14 05:54:58,174 INFO L87 Difference]: Start difference. First operand 210 states and 286 transitions. Second operand has 18 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-14 05:55:00,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:55:00,544 INFO L93 Difference]: Finished difference Result 215 states and 291 transitions. [2022-07-14 05:55:00,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 05:55:00,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 39 [2022-07-14 05:55:00,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:55:00,548 INFO L225 Difference]: With dead ends: 215 [2022-07-14 05:55:00,549 INFO L226 Difference]: Without dead ends: 215 [2022-07-14 05:55:00,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-07-14 05:55:00,550 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 135 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:55:00,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 160 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 693 Invalid, 0 Unknown, 19 Unchecked, 2.1s Time] [2022-07-14 05:55:00,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-07-14 05:55:00,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2022-07-14 05:55:00,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 141 states have (on average 1.2553191489361701) internal successors, (177), 159 states have internal predecessors, (177), 29 states have call successors, (29), 16 states have call predecessors, (29), 24 states have return successors, (78), 34 states have call predecessors, (78), 29 states have call successors, (78) [2022-07-14 05:55:00,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 284 transitions. [2022-07-14 05:55:00,560 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 284 transitions. Word has length 39 [2022-07-14 05:55:00,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:55:00,560 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 284 transitions. [2022-07-14 05:55:00,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-14 05:55:00,560 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 284 transitions. [2022-07-14 05:55:00,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-14 05:55:00,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:55:00,561 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-07-14 05:55:00,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-14 05:55:00,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 05:55:00,772 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:55:00,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:55:00,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1830162110, now seen corresponding path program 3 times [2022-07-14 05:55:00,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:55:00,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561778680] [2022-07-14 05:55:00,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 05:55:00,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:55:00,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:55:00,775 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:55:00,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-14 05:55:00,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-14 05:55:00,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:55:01,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 05:55:01,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:55:01,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:55:13,387 INFO L356 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2022-07-14 05:55:13,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4 case distinctions, treesize of input 21 treesize of output 37 [2022-07-14 05:55:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 23 refuted. 5 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-14 05:55:13,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:55:15,679 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:55:15,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561778680] [2022-07-14 05:55:15,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561778680] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:55:15,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [604054412] [2022-07-14 05:55:15,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 05:55:15,680 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 05:55:15,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 05:55:15,681 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 05:55:15,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-07-14 05:55:15,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 05:55:15,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719277454] [2022-07-14 05:55:15,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 05:55:15,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:55:15,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:55:15,974 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 05:55:15,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 1 [2022-07-14 05:55:15,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-14 05:55:16,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-14 05:55:16,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:55:16,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 05:55:16,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:55:21,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:55:21,199 INFO L356 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2022-07-14 05:55:21,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 29 [2022-07-14 05:55:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-14 05:55:21,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:55:21,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719277454] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:55:21,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 05:55:21,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2022-07-14 05:55:21,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275733050] [2022-07-14 05:55:21,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 05:55:21,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 05:55:21,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:55:21,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 05:55:21,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=156, Unknown=8, NotChecked=0, Total=240 [2022-07-14 05:55:21,699 INFO L87 Difference]: Start difference. First operand 210 states and 284 transitions. Second operand has 12 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-14 05:55:53,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:55:53,720 INFO L93 Difference]: Finished difference Result 216 states and 307 transitions. [2022-07-14 05:55:53,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 05:55:53,720 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 39 [2022-07-14 05:55:53,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:55:53,722 INFO L225 Difference]: With dead ends: 216 [2022-07-14 05:55:53,722 INFO L226 Difference]: Without dead ends: 216 [2022-07-14 05:55:53,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 11 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=99, Invalid=196, Unknown=11, NotChecked=0, Total=306 [2022-07-14 05:55:53,722 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 58 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:55:53,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 118 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 95 Invalid, 0 Unknown, 242 Unchecked, 0.1s Time] [2022-07-14 05:55:53,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-14 05:55:53,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2022-07-14 05:55:53,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 145 states have (on average 1.2551724137931035) internal successors, (182), 162 states have internal predecessors, (182), 29 states have call successors, (29), 16 states have call predecessors, (29), 25 states have return successors, (96), 36 states have call predecessors, (96), 29 states have call successors, (96) [2022-07-14 05:55:53,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 307 transitions. [2022-07-14 05:55:53,731 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 307 transitions. Word has length 39 [2022-07-14 05:55:53,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:55:53,731 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 307 transitions. [2022-07-14 05:55:53,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-14 05:55:53,731 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 307 transitions. [2022-07-14 05:55:53,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-14 05:55:53,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:55:53,732 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-07-14 05:55:53,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-14 05:55:53,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-14 05:55:54,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:55:54,133 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:55:54,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:55:54,133 INFO L85 PathProgramCache]: Analyzing trace with hash -556103673, now seen corresponding path program 3 times [2022-07-14 05:55:54,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:55:54,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412099862] [2022-07-14 05:55:54,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 05:55:54,134 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:55:54,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:55:54,135 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:55:54,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-14 05:55:54,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-14 05:55:54,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:55:54,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-14 05:55:54,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:55:54,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:55:54,722 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 05:55:54,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 12 [2022-07-14 05:55:54,878 INFO L356 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-07-14 05:55:54,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 15 treesize of output 19 [2022-07-14 05:55:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 32 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-14 05:55:54,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:55:55,194 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 05:55:55,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 17 [2022-07-14 05:55:55,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:55:55,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412099862] [2022-07-14 05:55:55,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412099862] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:55:55,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [721607184] [2022-07-14 05:55:55,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 05:55:55,353 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 05:55:55,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 05:55:55,354 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 05:55:55,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-07-14 05:55:55,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-14 05:55:55,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:55:55,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-14 05:55:55,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:55:55,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:55:55,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:56:14,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:56:14,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:56:14,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:56:14,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-07-14 05:56:14,435 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-14 05:56:14,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-07-14 05:56:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 40 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 05:56:14,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:56:27,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [721607184] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:56:27,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 05:56:27,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2022-07-14 05:56:27,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892466884] [2022-07-14 05:56:27,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 05:56:27,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-14 05:56:27,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:56:27,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-14 05:56:27,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=351, Unknown=15, NotChecked=0, Total=420 [2022-07-14 05:56:27,445 INFO L87 Difference]: Start difference. First operand 215 states and 307 transitions. Second operand has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 9 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-14 05:56:52,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:56:52,498 INFO L93 Difference]: Finished difference Result 215 states and 306 transitions. [2022-07-14 05:56:52,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 05:56:52,498 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 9 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 43 [2022-07-14 05:56:52,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:56:52,500 INFO L225 Difference]: With dead ends: 215 [2022-07-14 05:56:52,500 INFO L226 Difference]: Without dead ends: 215 [2022-07-14 05:56:52,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 56.4s TimeCoverageRelationStatistics Valid=113, Invalid=676, Unknown=23, NotChecked=0, Total=812 [2022-07-14 05:56:52,500 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 44 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 424 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:56:52,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 165 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 154 Invalid, 0 Unknown, 424 Unchecked, 0.2s Time] [2022-07-14 05:56:52,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-07-14 05:56:52,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2022-07-14 05:56:52,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 144 states have (on average 1.25) internal successors, (180), 162 states have internal predecessors, (180), 29 states have call successors, (29), 16 states have call predecessors, (29), 25 states have return successors, (96), 35 states have call predecessors, (96), 29 states have call successors, (96) [2022-07-14 05:56:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 305 transitions. [2022-07-14 05:56:52,508 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 305 transitions. Word has length 43 [2022-07-14 05:56:52,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:56:52,509 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 305 transitions. [2022-07-14 05:56:52,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 9 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-14 05:56:52,509 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 305 transitions. [2022-07-14 05:56:52,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-14 05:56:52,510 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:56:52,510 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1] [2022-07-14 05:56:52,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-14 05:56:52,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-07-14 05:56:52,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 05:56:52,923 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:56:52,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:56:52,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1915391076, now seen corresponding path program 2 times [2022-07-14 05:56:52,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:56:52,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308174883] [2022-07-14 05:56:52,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:56:52,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:56:52,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:56:52,925 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:56:52,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-14 05:56:53,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 05:56:53,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:56:53,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 05:56:53,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:56:53,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:56:53,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:56:59,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:56:59,549 INFO L356 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-07-14 05:56:59,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-07-14 05:56:59,563 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 05:56:59,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 12 [2022-07-14 05:56:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 105 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-14 05:56:59,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:57:02,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:57:02,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308174883] [2022-07-14 05:57:02,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308174883] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:57:02,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [818397940] [2022-07-14 05:57:02,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:57:02,260 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 05:57:02,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 05:57:02,261 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 05:57:02,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-07-14 05:57:02,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 05:57:02,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:57:02,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 05:57:02,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:57:02,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:57:02,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:57:06,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:57:06,842 INFO L356 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-07-14 05:57:06,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-07-14 05:57:06,855 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 05:57:06,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 12 [2022-07-14 05:57:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 105 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-14 05:57:06,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:57:13,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [818397940] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:57:13,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 05:57:13,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-14 05:57:13,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290728968] [2022-07-14 05:57:13,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 05:57:13,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 05:57:13,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:57:13,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 05:57:13,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=139, Unknown=7, NotChecked=0, Total=182 [2022-07-14 05:57:13,548 INFO L87 Difference]: Start difference. First operand 214 states and 305 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-14 05:57:17,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:57:17,847 INFO L93 Difference]: Finished difference Result 231 states and 335 transitions. [2022-07-14 05:57:17,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 05:57:17,847 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) Word has length 69 [2022-07-14 05:57:17,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:57:17,849 INFO L225 Difference]: With dead ends: 231 [2022-07-14 05:57:17,849 INFO L226 Difference]: Without dead ends: 231 [2022-07-14 05:57:17,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 139 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=56, Invalid=175, Unknown=9, NotChecked=0, Total=240 [2022-07-14 05:57:17,850 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 44 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:57:17,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 156 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 159 Invalid, 0 Unknown, 245 Unchecked, 0.2s Time] [2022-07-14 05:57:17,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-14 05:57:17,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2022-07-14 05:57:17,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 155 states have (on average 1.238709677419355) internal successors, (192), 174 states have internal predecessors, (192), 32 states have call successors, (32), 17 states have call predecessors, (32), 27 states have return successors, (110), 38 states have call predecessors, (110), 32 states have call successors, (110) [2022-07-14 05:57:17,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 334 transitions. [2022-07-14 05:57:17,860 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 334 transitions. Word has length 69 [2022-07-14 05:57:17,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:57:17,860 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 334 transitions. [2022-07-14 05:57:17,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-14 05:57:17,860 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 334 transitions. [2022-07-14 05:57:17,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-14 05:57:17,861 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:57:17,861 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:57:17,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-14 05:57:18,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-07-14 05:57:18,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 05:57:18,274 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:57:18,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:57:18,275 INFO L85 PathProgramCache]: Analyzing trace with hash -612022781, now seen corresponding path program 1 times [2022-07-14 05:57:18,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:57:18,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244059776] [2022-07-14 05:57:18,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:57:18,275 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:57:18,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:57:18,276 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:57:18,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-14 05:57:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:57:18,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-14 05:57:18,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:57:18,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-07-14 05:57:18,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-07-14 05:57:18,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-07-14 05:57:18,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-07-14 05:57:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 05:57:18,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:57:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 05:57:19,118 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:57:19,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244059776] [2022-07-14 05:57:19,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244059776] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:57:19,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 05:57:19,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2022-07-14 05:57:19,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545819744] [2022-07-14 05:57:19,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 05:57:19,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 05:57:19,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:57:19,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 05:57:19,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-07-14 05:57:19,120 INFO L87 Difference]: Start difference. First operand 230 states and 334 transitions. Second operand has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-14 05:57:19,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:57:19,651 INFO L93 Difference]: Finished difference Result 278 states and 408 transitions. [2022-07-14 05:57:19,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 05:57:19,659 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2022-07-14 05:57:19,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:57:19,661 INFO L225 Difference]: With dead ends: 278 [2022-07-14 05:57:19,661 INFO L226 Difference]: Without dead ends: 278 [2022-07-14 05:57:19,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-07-14 05:57:19,662 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 48 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 05:57:19,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 795 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 224 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-07-14 05:57:19,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-07-14 05:57:19,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 267. [2022-07-14 05:57:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 183 states have (on average 1.2568306010928962) internal successors, (230), 203 states have internal predecessors, (230), 37 states have call successors, (37), 20 states have call predecessors, (37), 31 states have return successors, (136), 43 states have call predecessors, (136), 37 states have call successors, (136) [2022-07-14 05:57:19,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 403 transitions. [2022-07-14 05:57:19,673 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 403 transitions. Word has length 38 [2022-07-14 05:57:19,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:57:19,673 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 403 transitions. [2022-07-14 05:57:19,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-14 05:57:19,673 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 403 transitions. [2022-07-14 05:57:19,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-14 05:57:19,674 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:57:19,674 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-07-14 05:57:19,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-14 05:57:19,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 05:57:19,883 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:57:19,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:57:19,883 INFO L85 PathProgramCache]: Analyzing trace with hash -172709005, now seen corresponding path program 2 times [2022-07-14 05:57:19,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:57:19,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929818440] [2022-07-14 05:57:19,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:57:19,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:57:19,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:57:19,884 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:57:19,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-14 05:57:20,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 05:57:20,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:57:20,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 05:57:20,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:57:20,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-14 05:57:20,267 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 05:57:20,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 25 [2022-07-14 05:57:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-14 05:57:20,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:57:20,391 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 05:57:20,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929818440] [2022-07-14 05:57:20,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929818440] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:57:20,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2027863408] [2022-07-14 05:57:20,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:57:20,392 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 05:57:20,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 05:57:20,392 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 05:57:20,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-07-14 05:57:20,671 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 05:57:20,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385824165] [2022-07-14 05:57:20,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:57:20,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:57:20,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:57:20,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 1 [2022-07-14 05:57:20,680 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 05:57:20,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-14 05:57:20,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 05:57:20,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:57:20,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 05:57:20,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:57:24,983 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 05:57:24,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 17 [2022-07-14 05:57:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-14 05:57:24,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:57:25,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385824165] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:57:25,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 05:57:25,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2022-07-14 05:57:25,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739252115] [2022-07-14 05:57:25,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 05:57:25,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 05:57:25,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 05:57:25,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 05:57:25,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2022-07-14 05:57:25,127 INFO L87 Difference]: Start difference. First operand 267 states and 403 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-14 05:57:33,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:57:33,329 INFO L93 Difference]: Finished difference Result 279 states and 426 transitions. [2022-07-14 05:57:33,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 05:57:33,330 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 45 [2022-07-14 05:57:33,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:57:33,332 INFO L225 Difference]: With dead ends: 279 [2022-07-14 05:57:33,332 INFO L226 Difference]: Without dead ends: 279 [2022-07-14 05:57:33,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=44, Invalid=86, Unknown=2, NotChecked=0, Total=132 [2022-07-14 05:57:33,333 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 9 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:57:33,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 166 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 234 Unchecked, 0.1s Time] [2022-07-14 05:57:33,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-07-14 05:57:33,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 278. [2022-07-14 05:57:33,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 191 states have (on average 1.2513089005235603) internal successors, (239), 211 states have internal predecessors, (239), 39 states have call successors, (39), 20 states have call predecessors, (39), 32 states have return successors, (148), 46 states have call predecessors, (148), 39 states have call successors, (148) [2022-07-14 05:57:33,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 426 transitions. [2022-07-14 05:57:33,344 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 426 transitions. Word has length 45 [2022-07-14 05:57:33,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:57:33,344 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 426 transitions. [2022-07-14 05:57:33,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-14 05:57:33,345 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 426 transitions. [2022-07-14 05:57:33,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-14 05:57:33,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:57:33,346 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1] [2022-07-14 05:57:33,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-14 05:57:33,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-14 05:57:33,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:57:33,756 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 05:57:33,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:57:33,757 INFO L85 PathProgramCache]: Analyzing trace with hash 917383077, now seen corresponding path program 3 times [2022-07-14 05:57:33,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 05:57:33,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329873089] [2022-07-14 05:57:33,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 05:57:33,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 05:57:33,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 05:57:33,758 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 05:57:33,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-14 05:57:34,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-14 05:57:34,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:57:34,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 05:57:34,056 INFO L286 TraceCheckSpWp]: Computing forward predicates...