./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ae007674 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/array-memsafety/java_BubbleSort-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 05:44:50,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 05:44:50,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 05:44:50,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 05:44:50,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 05:44:50,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 05:44:50,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 05:44:50,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 05:44:50,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 05:44:50,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 05:44:50,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 05:44:50,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 05:44:50,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 05:44:50,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 05:44:50,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 05:44:50,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 05:44:50,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 05:44:50,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 05:44:50,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 05:44:50,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 05:44:50,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 05:44:50,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 05:44:50,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 05:44:50,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 05:44:50,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 05:44:50,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 05:44:50,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 05:44:50,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 05:44:50,723 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 05:44:50,724 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 05:44:50,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 05:44:50,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 05:44:50,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 05:44:50,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 05:44:50,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 05:44:50,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 05:44:50,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 05:44:50,729 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 05:44:50,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 05:44:50,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 05:44:50,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 05:44:50,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-28 05:44:50,756 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 05:44:50,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 05:44:50,757 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 05:44:50,757 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 05:44:50,757 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 05:44:50,758 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 05:44:50,758 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 05:44:50,758 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 05:44:50,759 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 05:44:50,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 05:44:50,759 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 05:44:50,759 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-28 05:44:50,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 05:44:50,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 05:44:50,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 05:44:50,760 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-28 05:44:50,760 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-28 05:44:50,761 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-28 05:44:50,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 05:44:50,761 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 05:44:50,761 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 05:44:50,761 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 05:44:50,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 05:44:50,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 05:44:50,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 05:44:50,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:44:50,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 05:44:50,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 05:44:50,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 05:44:50,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 05:44:50,763 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 [2021-12-28 05:44:51,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 05:44:51,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 05:44:51,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 05:44:51,106 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 05:44:51,107 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 05:44:51,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2021-12-28 05:44:51,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/535861cdf/31cdfd2804d74901820193656c95ac46/FLAG90d6beea9 [2021-12-28 05:44:51,716 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 05:44:51,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2021-12-28 05:44:51,729 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/535861cdf/31cdfd2804d74901820193656c95ac46/FLAG90d6beea9 [2021-12-28 05:44:52,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/535861cdf/31cdfd2804d74901820193656c95ac46 [2021-12-28 05:44:52,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 05:44:52,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 05:44:52,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 05:44:52,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 05:44:52,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 05:44:52,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:44:52" (1/1) ... [2021-12-28 05:44:52,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3da6b853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:44:52, skipping insertion in model container [2021-12-28 05:44:52,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:44:52" (1/1) ... [2021-12-28 05:44:52,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 05:44:52,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 05:44:52,428 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:44:52,455 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-28 05:44:52,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@457f6a8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:44:52, skipping insertion in model container [2021-12-28 05:44:52,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 05:44:52,457 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-28 05:44:52,459 INFO L158 Benchmark]: Toolchain (without parser) took 313.18ms. Allocated memory was 52.4MB in the beginning and 67.1MB in the end (delta: 14.7MB). Free memory was 28.5MB in the beginning and 50.3MB in the end (delta: -21.7MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2021-12-28 05:44:52,461 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 52.4MB. Free memory is still 34.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 05:44:52,462 INFO L158 Benchmark]: CACSL2BoogieTranslator took 310.56ms. Allocated memory was 52.4MB in the beginning and 67.1MB in the end (delta: 14.7MB). Free memory was 28.3MB in the beginning and 50.3MB in the end (delta: -22.0MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2021-12-28 05:44:52,464 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 52.4MB. Free memory is still 34.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 310.56ms. Allocated memory was 52.4MB in the beginning and 67.1MB in the end (delta: 14.7MB). Free memory was 28.3MB in the beginning and 50.3MB in the end (delta: -22.0MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 526]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type 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/array-memsafety/java_BubbleSort-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 05:44:54,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 05:44:54,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 05:44:54,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 05:44:54,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 05:44:54,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 05:44:54,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 05:44:54,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 05:44:54,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 05:44:54,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 05:44:54,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 05:44:54,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 05:44:54,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 05:44:54,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 05:44:54,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 05:44:54,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 05:44:54,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 05:44:54,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 05:44:54,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 05:44:54,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 05:44:54,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 05:44:54,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 05:44:54,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 05:44:54,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 05:44:54,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 05:44:54,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 05:44:54,235 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 05:44:54,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 05:44:54,237 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 05:44:54,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 05:44:54,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 05:44:54,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 05:44:54,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 05:44:54,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 05:44:54,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 05:44:54,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 05:44:54,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 05:44:54,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 05:44:54,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 05:44:54,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 05:44:54,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 05:44:54,244 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-28 05:44:54,265 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 05:44:54,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 05:44:54,268 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 05:44:54,268 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 05:44:54,269 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 05:44:54,270 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 05:44:54,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 05:44:54,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 05:44:54,271 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 05:44:54,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 05:44:54,272 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 05:44:54,272 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-28 05:44:54,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 05:44:54,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 05:44:54,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 05:44:54,273 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-28 05:44:54,273 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-28 05:44:54,274 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-28 05:44:54,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 05:44:54,274 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 05:44:54,274 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-28 05:44:54,274 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-28 05:44:54,275 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 05:44:54,275 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 05:44:54,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 05:44:54,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 05:44:54,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 05:44:54,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:44:54,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 05:44:54,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 05:44:54,276 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-28 05:44:54,277 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-28 05:44:54,277 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-28 05:44:54,277 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 [2021-12-28 05:44:54,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 05:44:54,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 05:44:54,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 05:44:54,607 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 05:44:54,607 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 05:44:54,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2021-12-28 05:44:54,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbad4121b/c8be086ff5d8409dadfd9c78ed95f0a0/FLAGcc14147b1 [2021-12-28 05:44:55,112 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 05:44:55,113 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2021-12-28 05:44:55,124 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbad4121b/c8be086ff5d8409dadfd9c78ed95f0a0/FLAGcc14147b1 [2021-12-28 05:44:55,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbad4121b/c8be086ff5d8409dadfd9c78ed95f0a0 [2021-12-28 05:44:55,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 05:44:55,479 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 05:44:55,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 05:44:55,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 05:44:55,486 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 05:44:55,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:44:55" (1/1) ... [2021-12-28 05:44:55,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7658224c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:44:55, skipping insertion in model container [2021-12-28 05:44:55,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:44:55" (1/1) ... [2021-12-28 05:44:55,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 05:44:55,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 05:44:55,798 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:44:55,808 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-28 05:44:55,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 05:44:55,849 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:44:55,852 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 05:44:55,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:44:55,909 INFO L208 MainTranslator]: Completed translation [2021-12-28 05:44:55,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:44:55 WrapperNode [2021-12-28 05:44:55,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 05:44:55,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 05:44:55,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 05:44:55,911 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 05:44:55,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:44:55" (1/1) ... [2021-12-28 05:44:55,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:44:55" (1/1) ... [2021-12-28 05:44:55,950 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2021-12-28 05:44:55,950 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 05:44:55,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 05:44:55,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 05:44:55,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 05:44:55,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:44:55" (1/1) ... [2021-12-28 05:44:55,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:44:55" (1/1) ... [2021-12-28 05:44:55,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:44:55" (1/1) ... [2021-12-28 05:44:55,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:44:55" (1/1) ... [2021-12-28 05:44:55,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:44:55" (1/1) ... [2021-12-28 05:44:55,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:44:55" (1/1) ... [2021-12-28 05:44:55,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:44:55" (1/1) ... [2021-12-28 05:44:55,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 05:44:55,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 05:44:55,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 05:44:55,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 05:44:55,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:44:55" (1/1) ... [2021-12-28 05:44:55,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:44:56,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:44:56,020 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) [2021-12-28 05:44:56,022 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 [2021-12-28 05:44:56,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-28 05:44:56,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 05:44:56,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 05:44:56,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-28 05:44:56,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 05:44:56,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 05:44:56,183 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 05:44:56,200 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 05:44:56,509 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 05:44:56,514 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 05:44:56,515 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-28 05:44:56,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:44:56 BoogieIcfgContainer [2021-12-28 05:44:56,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 05:44:56,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 05:44:56,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 05:44:56,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 05:44:56,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 05:44:55" (1/3) ... [2021-12-28 05:44:56,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f4a8a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:44:56, skipping insertion in model container [2021-12-28 05:44:56,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:44:55" (2/3) ... [2021-12-28 05:44:56,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f4a8a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:44:56, skipping insertion in model container [2021-12-28 05:44:56,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:44:56" (3/3) ... [2021-12-28 05:44:56,523 INFO L111 eAbstractionObserver]: Analyzing ICFG java_BubbleSort-alloca-1.i [2021-12-28 05:44:56,530 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 05:44:56,531 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-12-28 05:44:56,577 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 05:44:56,584 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 05:44:56,584 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-12-28 05:44:56,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:44:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 05:44:56,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:44:56,622 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 05:44:56,623 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:44:56,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:44:56,628 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-12-28 05:44:56,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:44:56,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674453419] [2021-12-28 05:44:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:44:56,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:44:56,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:44:56,645 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) [2021-12-28 05:44:56,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-28 05:44:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:44:56,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 05:44:56,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:44:56,809 INFO L387 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 [2021-12-28 05:44:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:44:56,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:44:56,827 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:44:56,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674453419] [2021-12-28 05:44:56,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674453419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:44:56,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:44:56,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:44:56,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396312941] [2021-12-28 05:44:56,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:44:56,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:44:56,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:44:56,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:44:56,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:44:56,867 INFO L87 Difference]: Start difference. First operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:44:56,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:44:56,973 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-12-28 05:44:56,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:44:56,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-28 05:44:56,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:44:56,992 INFO L225 Difference]: With dead ends: 40 [2021-12-28 05:44:56,992 INFO L226 Difference]: Without dead ends: 38 [2021-12-28 05:44:56,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:44:56,998 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:44:56,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:44:57,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-28 05:44:57,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-28 05:44:57,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.75) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:44:57,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-12-28 05:44:57,032 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 6 [2021-12-28 05:44:57,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:44:57,033 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-12-28 05:44:57,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:44:57,033 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-12-28 05:44:57,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 05:44:57,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:44:57,034 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 05:44:57,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-28 05:44:57,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:44:57,243 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:44:57,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:44:57,244 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-12-28 05:44:57,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:44:57,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745971559] [2021-12-28 05:44:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:44:57,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:44:57,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:44:57,246 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) [2021-12-28 05:44:57,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-28 05:44:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:44:57,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 05:44:57,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:44:57,311 INFO L387 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 [2021-12-28 05:44:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:44:57,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:44:57,338 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:44:57,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745971559] [2021-12-28 05:44:57,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745971559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:44:57,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:44:57,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:44:57,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201381475] [2021-12-28 05:44:57,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:44:57,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:44:57,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:44:57,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:44:57,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:44:57,342 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:44:57,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:44:57,589 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2021-12-28 05:44:57,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:44:57,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-28 05:44:57,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:44:57,591 INFO L225 Difference]: With dead ends: 77 [2021-12-28 05:44:57,591 INFO L226 Difference]: Without dead ends: 77 [2021-12-28 05:44:57,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:44:57,593 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 43 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:44:57,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 145 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:44:57,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-28 05:44:57,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 41. [2021-12-28 05:44:57,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:44:57,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-12-28 05:44:57,602 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 6 [2021-12-28 05:44:57,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:44:57,602 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-12-28 05:44:57,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:44:57,603 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-12-28 05:44:57,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 05:44:57,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:44:57,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 05:44:57,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-28 05:44:57,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:44:57,813 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:44:57,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:44:57,814 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-12-28 05:44:57,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:44:57,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805353869] [2021-12-28 05:44:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:44:57,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:44:57,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:44:57,816 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) [2021-12-28 05:44:57,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-28 05:44:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:44:57,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 05:44:57,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:44:57,924 INFO L387 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 8 treesize of output 7 [2021-12-28 05:44:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:44:57,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:44:57,982 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:44:57,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805353869] [2021-12-28 05:44:57,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805353869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:44:57,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:44:57,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:44:57,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936025667] [2021-12-28 05:44:57,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:44:57,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:44:57,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:44:57,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:44:57,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:44:57,984 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:44:58,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:44:58,016 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-12-28 05:44:58,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:44:58,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-28 05:44:58,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:44:58,017 INFO L225 Difference]: With dead ends: 43 [2021-12-28 05:44:58,017 INFO L226 Difference]: Without dead ends: 43 [2021-12-28 05:44:58,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:44:58,019 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:44:58,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 94 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-12-28 05:44:58,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-28 05:44:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-12-28 05:44:58,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:44:58,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-12-28 05:44:58,025 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 6 [2021-12-28 05:44:58,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:44:58,025 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-12-28 05:44:58,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:44:58,026 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-12-28 05:44:58,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-28 05:44:58,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:44:58,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:44:58,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-28 05:44:58,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:44:58,235 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:44:58,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:44:58,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052082, now seen corresponding path program 1 times [2021-12-28 05:44:58,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:44:58,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035031525] [2021-12-28 05:44:58,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:44:58,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:44:58,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:44:58,237 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) [2021-12-28 05:44:58,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-28 05:44:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:44:58,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 05:44:58,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:44:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:44:58,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:44:58,311 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:44:58,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035031525] [2021-12-28 05:44:58,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035031525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:44:58,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:44:58,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:44:58,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012190113] [2021-12-28 05:44:58,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:44:58,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:44:58,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:44:58,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:44:58,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:44:58,313 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:44:58,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:44:58,352 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-12-28 05:44:58,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:44:58,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-28 05:44:58,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:44:58,353 INFO L225 Difference]: With dead ends: 44 [2021-12-28 05:44:58,353 INFO L226 Difference]: Without dead ends: 44 [2021-12-28 05:44:58,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:44:58,355 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:44:58,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 68 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:44:58,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-28 05:44:58,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2021-12-28 05:44:58,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:44:58,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-12-28 05:44:58,359 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 9 [2021-12-28 05:44:58,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:44:58,359 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-12-28 05:44:58,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:44:58,359 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-12-28 05:44:58,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-28 05:44:58,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:44:58,360 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:44:58,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-28 05:44:58,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:44:58,574 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:44:58,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:44:58,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-12-28 05:44:58,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:44:58,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574888460] [2021-12-28 05:44:58,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:44:58,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:44:58,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:44:58,577 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) [2021-12-28 05:44:58,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-28 05:44:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:44:58,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 05:44:58,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:44:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:44:58,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:44:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:44:58,766 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:44:58,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574888460] [2021-12-28 05:44:58,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574888460] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:44:58,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:44:58,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-28 05:44:58,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335948966] [2021-12-28 05:44:58,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:44:58,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 05:44:58,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:44:58,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 05:44:58,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:44:58,770 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:44:58,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:44:58,854 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-12-28 05:44:58,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:44:58,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-28 05:44:58,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:44:58,856 INFO L225 Difference]: With dead ends: 75 [2021-12-28 05:44:58,856 INFO L226 Difference]: Without dead ends: 75 [2021-12-28 05:44:58,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:44:58,858 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 71 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:44:58,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 167 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:44:58,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-28 05:44:58,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 46. [2021-12-28 05:44:58,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.5625) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:44:58,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-12-28 05:44:58,863 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 10 [2021-12-28 05:44:58,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:44:58,864 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-12-28 05:44:58,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:44:58,870 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-12-28 05:44:58,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-28 05:44:58,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:44:58,871 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:44:58,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-28 05:44:59,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:44:59,080 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:44:59,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:44:59,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-12-28 05:44:59,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:44:59,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400083419] [2021-12-28 05:44:59,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:44:59,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:44:59,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:44:59,082 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) [2021-12-28 05:44:59,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-28 05:44:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:44:59,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-28 05:44:59,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:44:59,175 INFO L387 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 8 treesize of output 7 [2021-12-28 05:44:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:44:59,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:44:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:44:59,910 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:44:59,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400083419] [2021-12-28 05:44:59,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400083419] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:44:59,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:44:59,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-12-28 05:44:59,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315945292] [2021-12-28 05:44:59,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:44:59,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 05:44:59,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:44:59,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 05:44:59,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:44:59,916 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:00,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:00,394 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-12-28 05:45:00,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 05:45:00,396 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-28 05:45:00,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:00,396 INFO L225 Difference]: With dead ends: 83 [2021-12-28 05:45:00,396 INFO L226 Difference]: Without dead ends: 83 [2021-12-28 05:45:00,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-28 05:45:00,397 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 72 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:00,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 189 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2021-12-28 05:45:00,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-28 05:45:00,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2021-12-28 05:45:00,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.5) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:00,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-12-28 05:45:00,402 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 10 [2021-12-28 05:45:00,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:00,402 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-12-28 05:45:00,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:00,402 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-12-28 05:45:00,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 05:45:00,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:00,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:00,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:00,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:00,617 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:00,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:00,617 INFO L85 PathProgramCache]: Analyzing trace with hash 363893197, now seen corresponding path program 1 times [2021-12-28 05:45:00,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:00,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816018101] [2021-12-28 05:45:00,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:00,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:00,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:00,619 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) [2021-12-28 05:45:00,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-28 05:45:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:00,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 05:45:00,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:45:00,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:45:00,777 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:00,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816018101] [2021-12-28 05:45:00,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816018101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:00,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:00,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:45:00,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542391118] [2021-12-28 05:45:00,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:00,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:45:00,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:00,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:45:00,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:45:00,779 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:00,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:00,785 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-12-28 05:45:00,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:45:00,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-28 05:45:00,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:00,794 INFO L225 Difference]: With dead ends: 61 [2021-12-28 05:45:00,794 INFO L226 Difference]: Without dead ends: 59 [2021-12-28 05:45:00,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:45:00,795 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:00,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 101 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2021-12-28 05:45:00,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-28 05:45:00,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2021-12-28 05:45:00,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:00,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2021-12-28 05:45:00,811 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 13 [2021-12-28 05:45:00,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:00,812 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2021-12-28 05:45:00,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2021-12-28 05:45:00,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 05:45:00,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:00,813 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:00,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:01,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:01,023 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:01,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:01,023 INFO L85 PathProgramCache]: Analyzing trace with hash 363893999, now seen corresponding path program 1 times [2021-12-28 05:45:01,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:01,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269130733] [2021-12-28 05:45:01,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:01,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:01,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:01,025 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) [2021-12-28 05:45:01,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-28 05:45:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:01,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 05:45:01,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:01,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:45:01,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:45:01,111 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:01,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269130733] [2021-12-28 05:45:01,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269130733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:01,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:01,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:45:01,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118126692] [2021-12-28 05:45:01,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:01,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:45:01,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:01,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:45:01,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:45:01,113 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:01,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:01,147 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-12-28 05:45:01,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:45:01,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-28 05:45:01,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:01,148 INFO L225 Difference]: With dead ends: 59 [2021-12-28 05:45:01,148 INFO L226 Difference]: Without dead ends: 51 [2021-12-28 05:45:01,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:45:01,149 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:01,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 106 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:01,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-28 05:45:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-28 05:45:01,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-12-28 05:45:01,153 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 13 [2021-12-28 05:45:01,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:01,153 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-12-28 05:45:01,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:01,154 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-12-28 05:45:01,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 05:45:01,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:01,154 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:01,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:01,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:01,363 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:01,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:01,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958577, now seen corresponding path program 1 times [2021-12-28 05:45:01,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:01,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67801448] [2021-12-28 05:45:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:01,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:01,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:01,365 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 05:45:01,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-28 05:45:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:01,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 05:45:01,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:01,415 INFO L387 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 [2021-12-28 05:45:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:45:01,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:45:01,442 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:01,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67801448] [2021-12-28 05:45:01,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67801448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:01,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:01,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:45:01,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691219030] [2021-12-28 05:45:01,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:01,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:45:01,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:01,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:45:01,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:45:01,445 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:01,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:01,552 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2021-12-28 05:45:01,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:45:01,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-28 05:45:01,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:01,553 INFO L225 Difference]: With dead ends: 45 [2021-12-28 05:45:01,553 INFO L226 Difference]: Without dead ends: 45 [2021-12-28 05:45:01,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:45:01,554 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:01,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 25 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:45:01,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-28 05:45:01,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-28 05:45:01,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:01,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2021-12-28 05:45:01,558 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 13 [2021-12-28 05:45:01,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:01,558 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2021-12-28 05:45:01,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:01,558 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2021-12-28 05:45:01,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 05:45:01,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:01,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:01,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:01,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:01,763 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:01,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:01,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958578, now seen corresponding path program 1 times [2021-12-28 05:45:01,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:01,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552074844] [2021-12-28 05:45:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:01,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:01,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:01,765 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) [2021-12-28 05:45:01,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-28 05:45:01,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:01,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-28 05:45:01,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:01,845 INFO L387 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 8 treesize of output 7 [2021-12-28 05:45:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:02,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:02,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:02,482 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:02,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552074844] [2021-12-28 05:45:02,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552074844] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:02,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:45:02,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-12-28 05:45:02,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781409643] [2021-12-28 05:45:02,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:02,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:45:02,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:02,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:45:02,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-28 05:45:02,483 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:02,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:02,853 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-12-28 05:45:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:45:02,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-28 05:45:02,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:02,855 INFO L225 Difference]: With dead ends: 51 [2021-12-28 05:45:02,855 INFO L226 Difference]: Without dead ends: 51 [2021-12-28 05:45:02,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-12-28 05:45:02,856 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:02,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 43 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:45:02,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-28 05:45:02,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2021-12-28 05:45:02,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:02,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-12-28 05:45:02,859 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 13 [2021-12-28 05:45:02,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:02,860 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-12-28 05:45:02,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:02,860 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-12-28 05:45:02,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-28 05:45:02,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:02,860 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:02,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:03,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:03,069 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:03,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:03,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1346022463, now seen corresponding path program 1 times [2021-12-28 05:45:03,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:03,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335581377] [2021-12-28 05:45:03,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:03,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:03,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:03,072 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 05:45:03,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-28 05:45:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:03,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-28 05:45:03,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:03,156 INFO L387 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 8 treesize of output 7 [2021-12-28 05:45:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:45:03,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:45:03,368 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:03,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335581377] [2021-12-28 05:45:03,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335581377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:03,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:03,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:45:03,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021768488] [2021-12-28 05:45:03,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:03,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:45:03,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:03,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:45:03,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:45:03,369 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:03,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:03,568 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-12-28 05:45:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:45:03,569 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-28 05:45:03,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:03,569 INFO L225 Difference]: With dead ends: 49 [2021-12-28 05:45:03,569 INFO L226 Difference]: Without dead ends: 49 [2021-12-28 05:45:03,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:45:03,570 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:03,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 77 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2021-12-28 05:45:03,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-28 05:45:03,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-28 05:45:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-12-28 05:45:03,573 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 14 [2021-12-28 05:45:03,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:03,573 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-12-28 05:45:03,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:03,573 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-12-28 05:45:03,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-28 05:45:03,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:03,574 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:03,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:03,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:03,783 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:03,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:03,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1570446787, now seen corresponding path program 1 times [2021-12-28 05:45:03,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:03,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1984848950] [2021-12-28 05:45:03,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:03,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:03,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:03,785 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) [2021-12-28 05:45:03,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-28 05:45:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:03,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-28 05:45:03,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:03,856 INFO L387 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 8 treesize of output 7 [2021-12-28 05:45:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:45:04,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:45:04,902 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:04,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1984848950] [2021-12-28 05:45:04,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1984848950] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:04,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:45:04,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-28 05:45:04,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084700713] [2021-12-28 05:45:04,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:04,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 05:45:04,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:04,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 05:45:04,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-28 05:45:04,904 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:07,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:07,259 INFO L93 Difference]: Finished difference Result 143 states and 165 transitions. [2021-12-28 05:45:07,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-28 05:45:07,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-28 05:45:07,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:07,260 INFO L225 Difference]: With dead ends: 143 [2021-12-28 05:45:07,260 INFO L226 Difference]: Without dead ends: 143 [2021-12-28 05:45:07,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2021-12-28 05:45:07,261 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 457 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:07,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 141 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 226 Invalid, 0 Unknown, 35 Unchecked, 1.0s Time] [2021-12-28 05:45:07,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-28 05:45:07,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2021-12-28 05:45:07,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 109 states have (on average 1.3944954128440368) internal successors, (152), 114 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 152 transitions. [2021-12-28 05:45:07,273 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 152 transitions. Word has length 17 [2021-12-28 05:45:07,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:07,273 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 152 transitions. [2021-12-28 05:45:07,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:07,273 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 152 transitions. [2021-12-28 05:45:07,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-28 05:45:07,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:07,274 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-12-28 05:45:07,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:07,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:07,484 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:07,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:07,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-12-28 05:45:07,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:07,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142984314] [2021-12-28 05:45:07,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:45:07,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:07,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:07,485 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) [2021-12-28 05:45:07,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-28 05:45:07,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:45:07,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:07,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-28 05:45:07,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:07,571 INFO L387 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 8 treesize of output 7 [2021-12-28 05:45:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:07,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:08,725 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:08,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142984314] [2021-12-28 05:45:08,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142984314] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:08,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:45:08,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-28 05:45:08,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040113150] [2021-12-28 05:45:08,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:08,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 05:45:08,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:08,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 05:45:08,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-28 05:45:08,727 INFO L87 Difference]: Start difference. First operand 115 states and 152 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:11,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:11,108 INFO L93 Difference]: Finished difference Result 611 states and 822 transitions. [2021-12-28 05:45:11,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 05:45:11,109 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-28 05:45:11,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:11,111 INFO L225 Difference]: With dead ends: 611 [2021-12-28 05:45:11,111 INFO L226 Difference]: Without dead ends: 611 [2021-12-28 05:45:11,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-12-28 05:45:11,112 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 471 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:11,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 240 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 283 Invalid, 0 Unknown, 12 Unchecked, 1.3s Time] [2021-12-28 05:45:11,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-12-28 05:45:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 131. [2021-12-28 05:45:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 125 states have (on average 1.376) internal successors, (172), 130 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:11,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 172 transitions. [2021-12-28 05:45:11,129 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 172 transitions. Word has length 18 [2021-12-28 05:45:11,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:11,131 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 172 transitions. [2021-12-28 05:45:11,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:11,131 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 172 transitions. [2021-12-28 05:45:11,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-28 05:45:11,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:11,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:11,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:11,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:11,335 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:11,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:11,336 INFO L85 PathProgramCache]: Analyzing trace with hash -511718013, now seen corresponding path program 1 times [2021-12-28 05:45:11,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:11,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614804504] [2021-12-28 05:45:11,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:11,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:11,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:11,337 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) [2021-12-28 05:45:11,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-28 05:45:11,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:11,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 05:45:11,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:11,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:45:11,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:45:11,480 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:11,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614804504] [2021-12-28 05:45:11,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614804504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:11,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:11,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:45:11,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224005817] [2021-12-28 05:45:11,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:11,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:45:11,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:11,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:45:11,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:45:11,482 INFO L87 Difference]: Start difference. First operand 131 states and 172 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:11,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:11,621 INFO L93 Difference]: Finished difference Result 175 states and 221 transitions. [2021-12-28 05:45:11,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:45:11,622 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-28 05:45:11,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:11,623 INFO L225 Difference]: With dead ends: 175 [2021-12-28 05:45:11,623 INFO L226 Difference]: Without dead ends: 175 [2021-12-28 05:45:11,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:45:11,624 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 82 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:11,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 57 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:45:11,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-28 05:45:11,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 143. [2021-12-28 05:45:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 137 states have (on average 1.3503649635036497) internal successors, (185), 142 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:11,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 185 transitions. [2021-12-28 05:45:11,628 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 185 transitions. Word has length 18 [2021-12-28 05:45:11,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:11,628 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 185 transitions. [2021-12-28 05:45:11,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:11,629 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 185 transitions. [2021-12-28 05:45:11,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-28 05:45:11,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:11,629 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:11,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:11,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:11,835 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:11,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:11,836 INFO L85 PathProgramCache]: Analyzing trace with hash -511225436, now seen corresponding path program 1 times [2021-12-28 05:45:11,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:11,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252813793] [2021-12-28 05:45:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:11,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:11,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:11,837 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) [2021-12-28 05:45:11,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-28 05:45:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:11,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-28 05:45:11,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:11,896 INFO L387 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 8 treesize of output 7 [2021-12-28 05:45:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:45:12,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:45:12,676 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:12,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252813793] [2021-12-28 05:45:12,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252813793] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:12,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:45:12,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-12-28 05:45:12,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903453217] [2021-12-28 05:45:12,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:12,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-28 05:45:12,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:12,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-28 05:45:12,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-12-28 05:45:12,678 INFO L87 Difference]: Start difference. First operand 143 states and 185 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:13,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:13,124 INFO L93 Difference]: Finished difference Result 162 states and 209 transitions. [2021-12-28 05:45:13,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 05:45:13,125 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-28 05:45:13,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:13,126 INFO L225 Difference]: With dead ends: 162 [2021-12-28 05:45:13,126 INFO L226 Difference]: Without dead ends: 162 [2021-12-28 05:45:13,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-12-28 05:45:13,127 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:13,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 131 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2021-12-28 05:45:13,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-28 05:45:13,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 151. [2021-12-28 05:45:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.356164383561644) internal successors, (198), 150 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 198 transitions. [2021-12-28 05:45:13,131 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 198 transitions. Word has length 18 [2021-12-28 05:45:13,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:13,131 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 198 transitions. [2021-12-28 05:45:13,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:13,131 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 198 transitions. [2021-12-28 05:45:13,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-28 05:45:13,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:13,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:13,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:13,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:13,341 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:13,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:13,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1331880655, now seen corresponding path program 1 times [2021-12-28 05:45:13,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:13,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988442237] [2021-12-28 05:45:13,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:13,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:13,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:13,343 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) [2021-12-28 05:45:13,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-28 05:45:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:13,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-28 05:45:13,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:13,418 INFO L387 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 8 treesize of output 7 [2021-12-28 05:45:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:13,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:14,445 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:14,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988442237] [2021-12-28 05:45:14,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988442237] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:14,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:45:14,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-12-28 05:45:14,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518417750] [2021-12-28 05:45:14,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:14,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-28 05:45:14,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:14,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-28 05:45:14,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-12-28 05:45:14,446 INFO L87 Difference]: Start difference. First operand 151 states and 198 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:14,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:14,916 INFO L93 Difference]: Finished difference Result 155 states and 200 transitions. [2021-12-28 05:45:14,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 05:45:14,917 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-28 05:45:14,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:14,917 INFO L225 Difference]: With dead ends: 155 [2021-12-28 05:45:14,917 INFO L226 Difference]: Without dead ends: 153 [2021-12-28 05:45:14,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-12-28 05:45:14,918 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:14,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 127 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 106 Invalid, 0 Unknown, 36 Unchecked, 0.4s Time] [2021-12-28 05:45:14,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-28 05:45:14,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 123. [2021-12-28 05:45:14,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 119 states have (on average 1.3277310924369747) internal successors, (158), 122 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:14,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 158 transitions. [2021-12-28 05:45:14,922 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 158 transitions. Word has length 19 [2021-12-28 05:45:14,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:14,922 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 158 transitions. [2021-12-28 05:45:14,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:14,922 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 158 transitions. [2021-12-28 05:45:14,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-28 05:45:14,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:14,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:14,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:15,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:15,127 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:15,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:15,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1149452832, now seen corresponding path program 1 times [2021-12-28 05:45:15,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:15,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11675091] [2021-12-28 05:45:15,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:15,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:15,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:15,129 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 05:45:15,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-28 05:45:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:15,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-28 05:45:15,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:15,208 INFO L387 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 8 treesize of output 7 [2021-12-28 05:45:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 05:45:15,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 05:45:16,185 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:16,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11675091] [2021-12-28 05:45:16,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11675091] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:16,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:45:16,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-12-28 05:45:16,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661701785] [2021-12-28 05:45:16,186 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:16,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-28 05:45:16,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:16,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-28 05:45:16,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-12-28 05:45:16,187 INFO L87 Difference]: Start difference. First operand 123 states and 158 transitions. Second operand has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:16,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:16,580 INFO L93 Difference]: Finished difference Result 173 states and 225 transitions. [2021-12-28 05:45:16,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 05:45:16,581 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-28 05:45:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:16,582 INFO L225 Difference]: With dead ends: 173 [2021-12-28 05:45:16,582 INFO L226 Difference]: Without dead ends: 173 [2021-12-28 05:45:16,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-12-28 05:45:16,583 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:16,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 164 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2021-12-28 05:45:16,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-28 05:45:16,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 153. [2021-12-28 05:45:16,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 149 states have (on average 1.3758389261744965) internal successors, (205), 152 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:16,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 205 transitions. [2021-12-28 05:45:16,590 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 205 transitions. Word has length 21 [2021-12-28 05:45:16,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:16,590 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 205 transitions. [2021-12-28 05:45:16,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:16,590 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 205 transitions. [2021-12-28 05:45:16,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-28 05:45:16,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:16,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:16,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:16,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:16,800 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:16,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:16,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1273299411, now seen corresponding path program 1 times [2021-12-28 05:45:16,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:16,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932347948] [2021-12-28 05:45:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:16,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:16,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:16,802 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) [2021-12-28 05:45:16,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-28 05:45:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:16,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-28 05:45:16,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:16,879 INFO L387 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 8 treesize of output 7 [2021-12-28 05:45:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:45:17,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:45:18,043 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:18,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932347948] [2021-12-28 05:45:18,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932347948] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:18,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:45:18,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-12-28 05:45:18,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879101503] [2021-12-28 05:45:18,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:18,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-28 05:45:18,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:18,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-28 05:45:18,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-12-28 05:45:18,045 INFO L87 Difference]: Start difference. First operand 153 states and 205 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:18,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:18,640 INFO L93 Difference]: Finished difference Result 171 states and 225 transitions. [2021-12-28 05:45:18,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 05:45:18,642 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-28 05:45:18,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:18,642 INFO L225 Difference]: With dead ends: 171 [2021-12-28 05:45:18,642 INFO L226 Difference]: Without dead ends: 167 [2021-12-28 05:45:18,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-12-28 05:45:18,643 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:18,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 126 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 137 Invalid, 0 Unknown, 24 Unchecked, 0.5s Time] [2021-12-28 05:45:18,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-28 05:45:18,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-12-28 05:45:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 163 states have (on average 1.3496932515337423) internal successors, (220), 166 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 220 transitions. [2021-12-28 05:45:18,646 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 220 transitions. Word has length 22 [2021-12-28 05:45:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:18,646 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 220 transitions. [2021-12-28 05:45:18,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:18,647 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 220 transitions. [2021-12-28 05:45:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-28 05:45:18,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:18,647 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:18,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:18,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:18,851 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:18,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:18,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1637861780, now seen corresponding path program 2 times [2021-12-28 05:45:18,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:18,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453720480] [2021-12-28 05:45:18,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:45:18,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:18,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:18,853 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 05:45:18,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-28 05:45:18,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:45:18,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:18,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-28 05:45:18,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:18,931 INFO L387 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 8 treesize of output 7 [2021-12-28 05:45:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 05:45:19,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 05:45:20,511 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:20,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453720480] [2021-12-28 05:45:20,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453720480] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:20,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:45:20,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-12-28 05:45:20,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615427379] [2021-12-28 05:45:20,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:20,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-28 05:45:20,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:20,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-28 05:45:20,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-12-28 05:45:20,513 INFO L87 Difference]: Start difference. First operand 167 states and 220 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:22,828 INFO L93 Difference]: Finished difference Result 196 states and 255 transitions. [2021-12-28 05:45:22,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 05:45:22,829 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-28 05:45:22,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:22,830 INFO L225 Difference]: With dead ends: 196 [2021-12-28 05:45:22,830 INFO L226 Difference]: Without dead ends: 193 [2021-12-28 05:45:22,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-12-28 05:45:22,831 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 106 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:22,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 150 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 219 Invalid, 0 Unknown, 25 Unchecked, 0.9s Time] [2021-12-28 05:45:22,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-12-28 05:45:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 162. [2021-12-28 05:45:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 158 states have (on average 1.3417721518987342) internal successors, (212), 161 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:22,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 212 transitions. [2021-12-28 05:45:22,834 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 212 transitions. Word has length 23 [2021-12-28 05:45:22,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:22,835 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 212 transitions. [2021-12-28 05:45:22,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:22,835 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 212 transitions. [2021-12-28 05:45:22,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-28 05:45:22,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:22,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:22,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:23,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:23,039 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:23,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:23,040 INFO L85 PathProgramCache]: Analyzing trace with hash -2028106434, now seen corresponding path program 1 times [2021-12-28 05:45:23,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:23,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207342102] [2021-12-28 05:45:23,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:23,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:23,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:23,041 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) [2021-12-28 05:45:23,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-28 05:45:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:23,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 05:45:23,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 05:45:23,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:45:23,221 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:23,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207342102] [2021-12-28 05:45:23,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207342102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:23,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:23,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:45:23,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163066615] [2021-12-28 05:45:23,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:23,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:45:23,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:23,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:45:23,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:45:23,222 INFO L87 Difference]: Start difference. First operand 162 states and 212 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:23,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:23,243 INFO L93 Difference]: Finished difference Result 210 states and 279 transitions. [2021-12-28 05:45:23,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:45:23,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-28 05:45:23,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:23,244 INFO L225 Difference]: With dead ends: 210 [2021-12-28 05:45:23,244 INFO L226 Difference]: Without dead ends: 208 [2021-12-28 05:45:23,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:45:23,245 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:23,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 57 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2021-12-28 05:45:23,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-28 05:45:23,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 202. [2021-12-28 05:45:23,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 198 states have (on average 1.3434343434343434) internal successors, (266), 201 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:23,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 266 transitions. [2021-12-28 05:45:23,250 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 266 transitions. Word has length 25 [2021-12-28 05:45:23,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:23,250 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 266 transitions. [2021-12-28 05:45:23,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:23,250 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 266 transitions. [2021-12-28 05:45:23,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-28 05:45:23,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:23,251 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 1] [2021-12-28 05:45:23,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:23,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:23,460 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:23,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:23,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1774535125, now seen corresponding path program 1 times [2021-12-28 05:45:23,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:23,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488755150] [2021-12-28 05:45:23,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:23,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:23,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:23,462 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 05:45:23,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-28 05:45:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:23,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 05:45:23,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 05:45:23,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:45:23,693 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:23,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488755150] [2021-12-28 05:45:23,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488755150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:23,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:23,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:45:23,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081765480] [2021-12-28 05:45:23,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:23,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:45:23,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:23,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:45:23,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:45:23,694 INFO L87 Difference]: Start difference. First operand 202 states and 266 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:23,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:23,699 INFO L93 Difference]: Finished difference Result 201 states and 265 transitions. [2021-12-28 05:45:23,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:45:23,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-28 05:45:23,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:23,701 INFO L225 Difference]: With dead ends: 201 [2021-12-28 05:45:23,701 INFO L226 Difference]: Without dead ends: 199 [2021-12-28 05:45:23,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:45:23,701 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:23,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 59 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-12-28 05:45:23,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-12-28 05:45:23,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 159. [2021-12-28 05:45:23,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 156 states have (on average 1.294871794871795) internal successors, (202), 158 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 202 transitions. [2021-12-28 05:45:23,706 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 202 transitions. Word has length 31 [2021-12-28 05:45:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:23,706 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 202 transitions. [2021-12-28 05:45:23,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 202 transitions. [2021-12-28 05:45:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-28 05:45:23,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:23,707 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:23,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:23,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:23,917 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:23,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:23,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1949567358, now seen corresponding path program 2 times [2021-12-28 05:45:23,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:23,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461791118] [2021-12-28 05:45:23,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:45:23,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:23,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:23,918 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 05:45:23,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-28 05:45:23,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:45:23,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:23,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-28 05:45:24,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:24,015 INFO L387 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 8 treesize of output 7 [2021-12-28 05:45:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 05:45:24,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 05:45:25,663 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:25,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461791118] [2021-12-28 05:45:25,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461791118] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:25,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:45:25,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-12-28 05:45:25,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84857499] [2021-12-28 05:45:25,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:25,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-28 05:45:25,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:25,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-28 05:45:25,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-12-28 05:45:25,664 INFO L87 Difference]: Start difference. First operand 159 states and 202 transitions. Second operand has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:34,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:34,710 INFO L93 Difference]: Finished difference Result 286 states and 355 transitions. [2021-12-28 05:45:34,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-28 05:45:34,711 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-28 05:45:34,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:34,712 INFO L225 Difference]: With dead ends: 286 [2021-12-28 05:45:34,712 INFO L226 Difference]: Without dead ends: 286 [2021-12-28 05:45:34,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=701, Invalid=2055, Unknown=0, NotChecked=0, Total=2756 [2021-12-28 05:45:34,713 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 489 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:34,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 128 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 313 Invalid, 0 Unknown, 41 Unchecked, 2.1s Time] [2021-12-28 05:45:34,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-12-28 05:45:34,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 193. [2021-12-28 05:45:34,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 190 states have (on average 1.2947368421052632) internal successors, (246), 192 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:34,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 246 transitions. [2021-12-28 05:45:34,718 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 246 transitions. Word has length 31 [2021-12-28 05:45:34,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:34,718 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 246 transitions. [2021-12-28 05:45:34,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:34,718 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 246 transitions. [2021-12-28 05:45:34,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-28 05:45:34,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:34,719 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:34,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:34,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:34,927 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:34,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:34,927 INFO L85 PathProgramCache]: Analyzing trace with hash 740071271, now seen corresponding path program 2 times [2021-12-28 05:45:34,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:34,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227212769] [2021-12-28 05:45:34,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:45:34,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:34,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:34,929 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) [2021-12-28 05:45:34,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-28 05:45:34,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:45:34,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:34,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-28 05:45:34,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:35,006 INFO L387 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 8 treesize of output 7 [2021-12-28 05:45:35,546 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 05:45:35,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 05:45:36,618 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:36,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227212769] [2021-12-28 05:45:36,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227212769] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:36,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:45:36,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-12-28 05:45:36,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787667341] [2021-12-28 05:45:36,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:36,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-28 05:45:36,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:36,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-28 05:45:36,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-12-28 05:45:36,619 INFO L87 Difference]: Start difference. First operand 193 states and 246 transitions. Second operand has 17 states, 16 states have (on average 3.375) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:39,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:39,070 INFO L93 Difference]: Finished difference Result 233 states and 298 transitions. [2021-12-28 05:45:39,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-28 05:45:39,071 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-28 05:45:39,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:39,071 INFO L225 Difference]: With dead ends: 233 [2021-12-28 05:45:39,071 INFO L226 Difference]: Without dead ends: 233 [2021-12-28 05:45:39,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2021-12-28 05:45:39,072 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:39,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 149 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 26 Unchecked, 0.4s Time] [2021-12-28 05:45:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-28 05:45:39,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 213. [2021-12-28 05:45:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 210 states have (on average 1.319047619047619) internal successors, (277), 212 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 277 transitions. [2021-12-28 05:45:39,076 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 277 transitions. Word has length 32 [2021-12-28 05:45:39,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:39,077 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 277 transitions. [2021-12-28 05:45:39,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:39,077 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 277 transitions. [2021-12-28 05:45:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-28 05:45:39,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:39,077 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:39,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-28 05:45:39,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:39,279 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:39,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:39,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1154994598, now seen corresponding path program 1 times [2021-12-28 05:45:39,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:39,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906815845] [2021-12-28 05:45:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:39,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:39,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:39,281 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 05:45:39,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-28 05:45:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:39,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-28 05:45:39,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:39,359 INFO L387 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 8 treesize of output 7 [2021-12-28 05:45:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 05:45:39,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 05:45:40,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:40,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906815845] [2021-12-28 05:45:40,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906815845] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:40,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:45:40,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-12-28 05:45:40,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695107750] [2021-12-28 05:45:40,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:40,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-28 05:45:40,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:40,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-28 05:45:40,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-12-28 05:45:40,906 INFO L87 Difference]: Start difference. First operand 213 states and 277 transitions. Second operand has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:41,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:41,617 INFO L93 Difference]: Finished difference Result 233 states and 302 transitions. [2021-12-28 05:45:41,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-28 05:45:41,618 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-28 05:45:41,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:41,619 INFO L225 Difference]: With dead ends: 233 [2021-12-28 05:45:41,620 INFO L226 Difference]: Without dead ends: 233 [2021-12-28 05:45:41,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-12-28 05:45:41,620 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:41,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 118 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2021-12-28 05:45:41,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-28 05:45:41,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 221. [2021-12-28 05:45:41,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 218 states have (on average 1.3073394495412844) internal successors, (285), 220 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:41,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 285 transitions. [2021-12-28 05:45:41,625 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 285 transitions. Word has length 33 [2021-12-28 05:45:41,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:41,626 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 285 transitions. [2021-12-28 05:45:41,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:41,626 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 285 transitions. [2021-12-28 05:45:41,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-28 05:45:41,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:41,627 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:41,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:41,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:41,836 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:41,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:41,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1467372908, now seen corresponding path program 3 times [2021-12-28 05:45:41,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:41,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482655756] [2021-12-28 05:45:41,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:45:41,837 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:41,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:41,837 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) [2021-12-28 05:45:41,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-28 05:45:41,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-28 05:45:41,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:41,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-28 05:45:41,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:41,991 INFO L387 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 8 treesize of output 7 [2021-12-28 05:45:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:42,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:42,867 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:42,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482655756] [2021-12-28 05:45:42,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482655756] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:42,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:45:42,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-12-28 05:45:42,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496434113] [2021-12-28 05:45:42,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:42,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-28 05:45:42,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:42,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-28 05:45:42,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-12-28 05:45:42,868 INFO L87 Difference]: Start difference. First operand 221 states and 285 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:43,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:43,279 INFO L93 Difference]: Finished difference Result 249 states and 317 transitions. [2021-12-28 05:45:43,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 05:45:43,280 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-28 05:45:43,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:43,281 INFO L225 Difference]: With dead ends: 249 [2021-12-28 05:45:43,281 INFO L226 Difference]: Without dead ends: 245 [2021-12-28 05:45:43,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-12-28 05:45:43,282 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 56 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:43,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 122 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 146 Invalid, 0 Unknown, 28 Unchecked, 0.3s Time] [2021-12-28 05:45:43,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-28 05:45:43,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2021-12-28 05:45:43,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 239 states have (on average 1.297071129707113) internal successors, (310), 241 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 310 transitions. [2021-12-28 05:45:43,286 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 310 transitions. Word has length 33 [2021-12-28 05:45:43,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:43,287 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 310 transitions. [2021-12-28 05:45:43,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:43,287 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 310 transitions. [2021-12-28 05:45:43,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-28 05:45:43,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:43,288 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-12-28 05:45:43,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:43,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:43,497 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:43,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:43,498 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-12-28 05:45:43,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:43,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123399496] [2021-12-28 05:45:43,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:45:43,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:43,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:43,500 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) [2021-12-28 05:45:43,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-28 05:45:43,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-28 05:45:43,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:43,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-28 05:45:43,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:43,671 INFO L387 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 8 treesize of output 7 [2021-12-28 05:45:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:44,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:45,732 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:45,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123399496] [2021-12-28 05:45:45,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123399496] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:45,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:45:45,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-12-28 05:45:45,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665434866] [2021-12-28 05:45:45,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:45,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-28 05:45:45,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:45,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-28 05:45:45,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-12-28 05:45:45,736 INFO L87 Difference]: Start difference. First operand 242 states and 310 transitions. Second operand has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:54,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:54,653 INFO L93 Difference]: Finished difference Result 2454 states and 3204 transitions. [2021-12-28 05:45:54,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-28 05:45:54,654 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-28 05:45:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:54,660 INFO L225 Difference]: With dead ends: 2454 [2021-12-28 05:45:54,660 INFO L226 Difference]: Without dead ends: 2454 [2021-12-28 05:45:54,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2021-12-28 05:45:54,661 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 977 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:54,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 608 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 818 Invalid, 0 Unknown, 31 Unchecked, 2.7s Time] [2021-12-28 05:45:54,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2021-12-28 05:45:54,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 274. [2021-12-28 05:45:54,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 271 states have (on average 1.2915129151291513) internal successors, (350), 273 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 350 transitions. [2021-12-28 05:45:54,678 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 350 transitions. Word has length 34 [2021-12-28 05:45:54,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:54,678 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 350 transitions. [2021-12-28 05:45:54,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:54,678 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 350 transitions. [2021-12-28 05:45:54,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-28 05:45:54,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:54,679 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:54,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:54,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:54,888 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:54,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:54,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1311508640, now seen corresponding path program 3 times [2021-12-28 05:45:54,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:54,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541436538] [2021-12-28 05:45:54,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:45:54,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:54,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:54,891 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 05:45:54,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-28 05:45:54,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-28 05:45:54,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:54,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-28 05:45:54,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:54,961 INFO L387 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 8 treesize of output 7 [2021-12-28 05:45:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-28 05:45:55,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-28 05:45:55,897 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:55,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541436538] [2021-12-28 05:45:55,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541436538] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:55,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:45:55,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-12-28 05:45:55,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464087874] [2021-12-28 05:45:55,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:55,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 05:45:55,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:55,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 05:45:55,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:45:55,898 INFO L87 Difference]: Start difference. First operand 274 states and 350 transitions. Second operand has 12 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:56,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:56,266 INFO L93 Difference]: Finished difference Result 345 states and 445 transitions. [2021-12-28 05:45:56,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 05:45:56,267 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-28 05:45:56,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:56,267 INFO L225 Difference]: With dead ends: 345 [2021-12-28 05:45:56,268 INFO L226 Difference]: Without dead ends: 345 [2021-12-28 05:45:56,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-12-28 05:45:56,268 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:56,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 103 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2021-12-28 05:45:56,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-12-28 05:45:56,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 333. [2021-12-28 05:45:56,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 330 states have (on average 1.3181818181818181) internal successors, (435), 332 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:56,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 435 transitions. [2021-12-28 05:45:56,274 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 435 transitions. Word has length 34 [2021-12-28 05:45:56,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:56,274 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 435 transitions. [2021-12-28 05:45:56,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:56,275 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 435 transitions. [2021-12-28 05:45:56,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-28 05:45:56,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:56,275 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:56,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:56,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:56,484 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:56,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:56,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1721521442, now seen corresponding path program 1 times [2021-12-28 05:45:56,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:56,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1143456207] [2021-12-28 05:45:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:56,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:56,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:56,486 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 05:45:56,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-28 05:45:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:56,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-28 05:45:56,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:56,584 INFO L387 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 8 treesize of output 7 [2021-12-28 05:45:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 05:45:57,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 05:45:57,808 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:57,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1143456207] [2021-12-28 05:45:57,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1143456207] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:57,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:45:57,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-12-28 05:45:57,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771927674] [2021-12-28 05:45:57,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:57,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-28 05:45:57,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:57,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-28 05:45:57,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-12-28 05:45:57,810 INFO L87 Difference]: Start difference. First operand 333 states and 435 transitions. Second operand has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:58,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:58,194 INFO L93 Difference]: Finished difference Result 489 states and 630 transitions. [2021-12-28 05:45:58,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 05:45:58,194 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-28 05:45:58,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:58,195 INFO L225 Difference]: With dead ends: 489 [2021-12-28 05:45:58,196 INFO L226 Difference]: Without dead ends: 489 [2021-12-28 05:45:58,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-12-28 05:45:58,196 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:58,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 177 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2021-12-28 05:45:58,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-12-28 05:45:58,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 419. [2021-12-28 05:45:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 416 states have (on average 1.3052884615384615) internal successors, (543), 418 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:58,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 543 transitions. [2021-12-28 05:45:58,202 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 543 transitions. Word has length 36 [2021-12-28 05:45:58,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:58,202 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 543 transitions. [2021-12-28 05:45:58,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:58,203 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 543 transitions. [2021-12-28 05:45:58,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-28 05:45:58,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:58,203 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:58,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-28 05:45:58,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:45:58,411 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:45:58,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:58,412 INFO L85 PathProgramCache]: Analyzing trace with hash -710345958, now seen corresponding path program 2 times [2021-12-28 05:45:58,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:45:58,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808668670] [2021-12-28 05:45:58,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:45:58,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:45:58,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:45:58,413 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) [2021-12-28 05:45:58,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-28 05:45:58,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:45:58,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:58,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-28 05:45:58,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:58,521 INFO L387 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 8 treesize of output 7 [2021-12-28 05:45:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-28 05:45:59,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-28 05:45:59,836 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:45:59,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808668670] [2021-12-28 05:45:59,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808668670] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:59,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:45:59,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-12-28 05:45:59,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776807224] [2021-12-28 05:45:59,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:59,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-28 05:45:59,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:45:59,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-28 05:45:59,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-12-28 05:45:59,837 INFO L87 Difference]: Start difference. First operand 419 states and 543 transitions. Second operand has 15 states, 14 states have (on average 4.0) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:00,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:00,228 INFO L93 Difference]: Finished difference Result 480 states and 612 transitions. [2021-12-28 05:46:00,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 05:46:00,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-28 05:46:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:00,230 INFO L225 Difference]: With dead ends: 480 [2021-12-28 05:46:00,230 INFO L226 Difference]: Without dead ends: 480 [2021-12-28 05:46:00,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-12-28 05:46:00,230 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:00,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 149 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2021-12-28 05:46:00,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-12-28 05:46:00,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 418. [2021-12-28 05:46:00,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 415 states have (on average 1.3036144578313253) internal successors, (541), 417 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:00,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 541 transitions. [2021-12-28 05:46:00,237 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 541 transitions. Word has length 39 [2021-12-28 05:46:00,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:00,237 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 541 transitions. [2021-12-28 05:46:00,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:00,237 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 541 transitions. [2021-12-28 05:46:00,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-28 05:46:00,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:00,238 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:00,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:00,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:46:00,448 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-28 05:46:00,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:00,448 INFO L85 PathProgramCache]: Analyzing trace with hash 898073347, now seen corresponding path program 1 times [2021-12-28 05:46:00,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:46:00,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885013204] [2021-12-28 05:46:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:00,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:46:00,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:46:00,449 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 05:46:00,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-28 05:46:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:00,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-28 05:46:00,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:00,545 INFO L387 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 8 treesize of output 7 [2021-12-28 05:46:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:01,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:02,765 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:46:02,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885013204] [2021-12-28 05:46:02,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [885013204] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:02,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:46:02,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-12-28 05:46:02,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617529002] [2021-12-28 05:46:02,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:02,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-28 05:46:02,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:46:02,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-28 05:46:02,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-12-28 05:46:02,767 INFO L87 Difference]: Start difference. First operand 418 states and 541 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)