./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/busybox-1.22.0/dirname-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 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/busybox-1.22.0/dirname-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash 90eaf2e76e590922119d90e478fc764e383193134f46d6fe59bc98f3ce7c6611 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-19 12:20:08,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-19 12:20:08,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-19 12:20:08,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-19 12:20:08,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-19 12:20:08,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-19 12:20:08,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-19 12:20:08,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-19 12:20:08,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-19 12:20:08,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-19 12:20:08,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-19 12:20:08,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-19 12:20:08,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-19 12:20:08,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-19 12:20:08,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-19 12:20:08,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-19 12:20:08,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-19 12:20:08,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-19 12:20:08,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-19 12:20:08,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-19 12:20:08,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-19 12:20:08,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-19 12:20:08,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-19 12:20:08,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-19 12:20:08,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-19 12:20:08,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-19 12:20:08,696 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-19 12:20:08,696 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-19 12:20:08,697 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-19 12:20:08,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-19 12:20:08,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-19 12:20:08,698 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-19 12:20:08,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-19 12:20:08,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-19 12:20:08,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-19 12:20:08,701 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-19 12:20:08,702 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-19 12:20:08,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-19 12:20:08,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-19 12:20:08,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-19 12:20:08,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-19 12:20:08,705 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-12-19 12:20:08,723 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-19 12:20:08,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-19 12:20:08,724 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-19 12:20:08,724 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-19 12:20:08,725 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-19 12:20:08,725 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-19 12:20:08,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-19 12:20:08,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-19 12:20:08,725 INFO L138 SettingsManager]: * Use SBE=true [2021-12-19 12:20:08,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-19 12:20:08,726 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-19 12:20:08,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-19 12:20:08,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-19 12:20:08,727 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-19 12:20:08,727 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-19 12:20:08,727 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-19 12:20:08,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-19 12:20:08,727 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-19 12:20:08,728 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-19 12:20:08,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-19 12:20:08,728 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-19 12:20:08,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-19 12:20:08,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-19 12:20:08,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-19 12:20:08,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-19 12:20:08,729 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-19 12:20:08,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-19 12:20:08,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-19 12:20:08,730 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90eaf2e76e590922119d90e478fc764e383193134f46d6fe59bc98f3ce7c6611 [2021-12-19 12:20:08,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-19 12:20:08,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-19 12:20:08,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-19 12:20:08,970 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-19 12:20:08,970 INFO L275 PluginConnector]: CDTParser initialized [2021-12-19 12:20:08,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/busybox-1.22.0/dirname-1.i [2021-12-19 12:20:09,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e9fbd6da/c50bc2798d8f4ddbbcf48bbf40ea7c13/FLAGa8469863f [2021-12-19 12:20:09,467 INFO L306 CDTParser]: Found 1 translation units. [2021-12-19 12:20:09,467 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/busybox-1.22.0/dirname-1.i [2021-12-19 12:20:09,494 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e9fbd6da/c50bc2798d8f4ddbbcf48bbf40ea7c13/FLAGa8469863f [2021-12-19 12:20:09,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e9fbd6da/c50bc2798d8f4ddbbcf48bbf40ea7c13 [2021-12-19 12:20:09,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-19 12:20:09,768 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-19 12:20:09,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-19 12:20:09,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-19 12:20:09,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-19 12:20:09,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 12:20:09" (1/1) ... [2021-12-19 12:20:09,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@334623fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:20:09, skipping insertion in model container [2021-12-19 12:20:09,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 12:20:09" (1/1) ... [2021-12-19 12:20:09,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-19 12:20:09,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-19 12:20:10,227 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-19 12:20:10,236 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) [2021-12-19 12:20:10,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2be40ce0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:20:10, skipping insertion in model container [2021-12-19 12:20:10,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-19 12:20:10,237 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-19 12:20:10,238 INFO L158 Benchmark]: Toolchain (without parser) took 469.07ms. Allocated memory was 121.6MB in the beginning and 230.7MB in the end (delta: 109.1MB). Free memory was 93.9MB in the beginning and 197.9MB in the end (delta: -104.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-19 12:20:10,239 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 121.6MB. Free memory is still 79.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-19 12:20:10,243 INFO L158 Benchmark]: CACSL2BoogieTranslator took 467.73ms. Allocated memory was 121.6MB in the beginning and 230.7MB in the end (delta: 109.1MB). Free memory was 93.9MB in the beginning and 197.9MB in the end (delta: -104.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-19 12:20:10,244 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 121.6MB. Free memory is still 79.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 467.73ms. Allocated memory was 121.6MB in the beginning and 230.7MB in the end (delta: 109.1MB). Free memory was 93.9MB in the beginning and 197.9MB in the end (delta: -104.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1162]: 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/busybox-1.22.0/dirname-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash 90eaf2e76e590922119d90e478fc764e383193134f46d6fe59bc98f3ce7c6611 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-19 12:20:11,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-19 12:20:11,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-19 12:20:11,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-19 12:20:11,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-19 12:20:11,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-19 12:20:11,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-19 12:20:11,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-19 12:20:11,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-19 12:20:11,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-19 12:20:11,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-19 12:20:11,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-19 12:20:11,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-19 12:20:11,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-19 12:20:11,777 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-19 12:20:11,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-19 12:20:11,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-19 12:20:11,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-19 12:20:11,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-19 12:20:11,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-19 12:20:11,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-19 12:20:11,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-19 12:20:11,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-19 12:20:11,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-19 12:20:11,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-19 12:20:11,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-19 12:20:11,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-19 12:20:11,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-19 12:20:11,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-19 12:20:11,813 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-19 12:20:11,813 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-19 12:20:11,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-19 12:20:11,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-19 12:20:11,814 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-19 12:20:11,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-19 12:20:11,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-19 12:20:11,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-19 12:20:11,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-19 12:20:11,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-19 12:20:11,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-19 12:20:11,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-19 12:20:11,818 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf [2021-12-19 12:20:11,846 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-19 12:20:11,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-19 12:20:11,854 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-19 12:20:11,854 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-19 12:20:11,855 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-19 12:20:11,855 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-19 12:20:11,855 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-19 12:20:11,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-19 12:20:11,856 INFO L138 SettingsManager]: * Use SBE=true [2021-12-19 12:20:11,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-19 12:20:11,856 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-19 12:20:11,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-19 12:20:11,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-19 12:20:11,856 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-19 12:20:11,856 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-19 12:20:11,857 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-19 12:20:11,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-19 12:20:11,857 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-19 12:20:11,857 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-19 12:20:11,857 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-19 12:20:11,857 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-19 12:20:11,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-19 12:20:11,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-19 12:20:11,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-19 12:20:11,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-19 12:20:11,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-19 12:20:11,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-19 12:20:11,858 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-19 12:20:11,859 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-19 12:20:11,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-19 12:20:11,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-19 12:20:11,859 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90eaf2e76e590922119d90e478fc764e383193134f46d6fe59bc98f3ce7c6611 [2021-12-19 12:20:12,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-19 12:20:12,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-19 12:20:12,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-19 12:20:12,159 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-19 12:20:12,160 INFO L275 PluginConnector]: CDTParser initialized [2021-12-19 12:20:12,161 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/busybox-1.22.0/dirname-1.i [2021-12-19 12:20:12,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2a39e402/73cd4911f3164fdb9a8bce430d847311/FLAG4ad58de86 [2021-12-19 12:20:12,709 INFO L306 CDTParser]: Found 1 translation units. [2021-12-19 12:20:12,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/busybox-1.22.0/dirname-1.i [2021-12-19 12:20:12,739 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2a39e402/73cd4911f3164fdb9a8bce430d847311/FLAG4ad58de86 [2021-12-19 12:20:12,990 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2a39e402/73cd4911f3164fdb9a8bce430d847311 [2021-12-19 12:20:12,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-19 12:20:12,993 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-19 12:20:12,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-19 12:20:12,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-19 12:20:12,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-19 12:20:12,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 12:20:12" (1/1) ... [2021-12-19 12:20:12,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f1592b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:20:12, skipping insertion in model container [2021-12-19 12:20:12,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 12:20:12" (1/1) ... [2021-12-19 12:20:13,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-19 12:20:13,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-19 12:20:13,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-19 12:20:13,574 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-19 12:20:13,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-19 12:20:13,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-19 12:20:13,640 INFO L203 MainTranslator]: Completed pre-run [2021-12-19 12:20:13,745 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-19 12:20:13,800 INFO L208 MainTranslator]: Completed translation [2021-12-19 12:20:13,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:20:13 WrapperNode [2021-12-19 12:20:13,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-19 12:20:13,802 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-19 12:20:13,802 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-19 12:20:13,802 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-19 12:20:13,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:20:13" (1/1) ... [2021-12-19 12:20:13,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:20:13" (1/1) ... [2021-12-19 12:20:13,849 INFO L137 Inliner]: procedures = 350, calls = 111, calls flagged for inlining = 8, calls inlined = 7, statements flattened = 265 [2021-12-19 12:20:13,849 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-19 12:20:13,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-19 12:20:13,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-19 12:20:13,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-19 12:20:13,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:20:13" (1/1) ... [2021-12-19 12:20:13,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:20:13" (1/1) ... [2021-12-19 12:20:13,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:20:13" (1/1) ... [2021-12-19 12:20:13,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:20:13" (1/1) ... [2021-12-19 12:20:13,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:20:13" (1/1) ... [2021-12-19 12:20:13,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:20:13" (1/1) ... [2021-12-19 12:20:13,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:20:13" (1/1) ... [2021-12-19 12:20:13,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-19 12:20:13,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-19 12:20:13,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-19 12:20:13,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-19 12:20:13,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:20:13" (1/1) ... [2021-12-19 12:20:13,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-19 12:20:13,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 12:20:13,909 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) [2021-12-19 12:20:13,930 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 [2021-12-19 12:20:13,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-19 12:20:13,955 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-19 12:20:13,955 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-19 12:20:13,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-19 12:20:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-19 12:20:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-19 12:20:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-19 12:20:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-12-19 12:20:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-19 12:20:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2021-12-19 12:20:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-19 12:20:13,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-19 12:20:13,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-19 12:20:13,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-19 12:20:14,085 INFO L236 CfgBuilder]: Building ICFG [2021-12-19 12:20:14,086 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-19 12:20:14,719 INFO L277 CfgBuilder]: Performing block encoding [2021-12-19 12:20:14,724 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-19 12:20:14,724 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-19 12:20:14,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 12:20:14 BoogieIcfgContainer [2021-12-19 12:20:14,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-19 12:20:14,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-19 12:20:14,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-19 12:20:14,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-19 12:20:14,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 12:20:12" (1/3) ... [2021-12-19 12:20:14,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6d05be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 12:20:14, skipping insertion in model container [2021-12-19 12:20:14,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:20:13" (2/3) ... [2021-12-19 12:20:14,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6d05be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 12:20:14, skipping insertion in model container [2021-12-19 12:20:14,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 12:20:14" (3/3) ... [2021-12-19 12:20:14,732 INFO L111 eAbstractionObserver]: Analyzing ICFG dirname-1.i [2021-12-19 12:20:14,735 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-19 12:20:14,735 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 73 error locations. [2021-12-19 12:20:14,781 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-19 12:20:14,787 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 [2021-12-19 12:20:14,788 INFO L340 AbstractCegarLoop]: Starting to check reachability of 73 error locations. [2021-12-19 12:20:14,826 INFO L276 IsEmpty]: Start isEmpty. Operand has 181 states, 105 states have (on average 1.9428571428571428) internal successors, (204), 178 states have internal predecessors, (204), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:14,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-19 12:20:14,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 12:20:14,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-19 12:20:14,830 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-19 12:20:14,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 12:20:14,836 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-19 12:20:14,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-19 12:20:14,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621658510] [2021-12-19 12:20:14,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 12:20:14,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-19 12:20:14,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-19 12:20:14,850 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) [2021-12-19 12:20:14,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-19 12:20:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 12:20:14,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-19 12:20:14,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 12:20:15,017 INFO L388 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 [2021-12-19 12:20:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 12:20:15,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-19 12:20:15,025 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-19 12:20:15,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621658510] [2021-12-19 12:20:15,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621658510] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 12:20:15,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 12:20:15,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-19 12:20:15,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454712143] [2021-12-19 12:20:15,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 12:20:15,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-19 12:20:15,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-19 12:20:15,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-19 12:20:15,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-19 12:20:15,049 INFO L87 Difference]: Start difference. First operand has 181 states, 105 states have (on average 1.9428571428571428) internal successors, (204), 178 states have internal predecessors, (204), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 12:20:15,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 12:20:15,311 INFO L93 Difference]: Finished difference Result 189 states and 206 transitions. [2021-12-19 12:20:15,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-19 12:20:15,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-12-19 12:20:15,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 12:20:15,318 INFO L225 Difference]: With dead ends: 189 [2021-12-19 12:20:15,318 INFO L226 Difference]: Without dead ends: 187 [2021-12-19 12:20:15,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-19 12:20:15,325 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 162 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-19 12:20:15,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 146 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-19 12:20:15,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-19 12:20:15,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 171. [2021-12-19 12:20:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 100 states have (on average 1.85) internal successors, (185), 168 states have internal predecessors, (185), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 187 transitions. [2021-12-19 12:20:15,359 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 187 transitions. Word has length 3 [2021-12-19 12:20:15,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 12:20:15,360 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 187 transitions. [2021-12-19 12:20:15,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 12:20:15,360 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 187 transitions. [2021-12-19 12:20:15,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-19 12:20:15,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 12:20:15,360 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-19 12:20:15,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-19 12:20:15,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-19 12:20:15,567 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-19 12:20:15,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 12:20:15,568 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-19 12:20:15,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-19 12:20:15,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395094960] [2021-12-19 12:20:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 12:20:15,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-19 12:20:15,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-19 12:20:15,570 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) [2021-12-19 12:20:15,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-19 12:20:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 12:20:15,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-19 12:20:15,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 12:20:15,634 INFO L388 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 [2021-12-19 12:20:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 12:20:15,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-19 12:20:15,643 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-19 12:20:15,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395094960] [2021-12-19 12:20:15,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395094960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 12:20:15,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 12:20:15,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-19 12:20:15,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276005334] [2021-12-19 12:20:15,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 12:20:15,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-19 12:20:15,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-19 12:20:15,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-19 12:20:15,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-19 12:20:15,646 INFO L87 Difference]: Start difference. First operand 171 states and 187 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 12:20:16,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 12:20:16,017 INFO L93 Difference]: Finished difference Result 170 states and 186 transitions. [2021-12-19 12:20:16,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-19 12:20:16,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-12-19 12:20:16,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 12:20:16,019 INFO L225 Difference]: With dead ends: 170 [2021-12-19 12:20:16,019 INFO L226 Difference]: Without dead ends: 170 [2021-12-19 12:20:16,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-19 12:20:16,020 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 9 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-19 12:20:16,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 292 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-19 12:20:16,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-19 12:20:16,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-12-19 12:20:16,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 100 states have (on average 1.84) internal successors, (184), 167 states have internal predecessors, (184), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:16,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 186 transitions. [2021-12-19 12:20:16,027 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 186 transitions. Word has length 3 [2021-12-19 12:20:16,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 12:20:16,027 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 186 transitions. [2021-12-19 12:20:16,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 12:20:16,028 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 186 transitions. [2021-12-19 12:20:16,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-19 12:20:16,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 12:20:16,028 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-19 12:20:16,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-19 12:20:16,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-19 12:20:16,235 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-19 12:20:16,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 12:20:16,236 INFO L85 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2021-12-19 12:20:16,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-19 12:20:16,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722388883] [2021-12-19 12:20:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 12:20:16,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-19 12:20:16,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-19 12:20:16,265 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) [2021-12-19 12:20:16,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-19 12:20:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 12:20:16,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-19 12:20:16,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 12:20:16,364 INFO L388 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 [2021-12-19 12:20:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 12:20:16,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-19 12:20:16,425 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-19 12:20:16,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722388883] [2021-12-19 12:20:16,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722388883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 12:20:16,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 12:20:16,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-19 12:20:16,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395627940] [2021-12-19 12:20:16,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 12:20:16,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-19 12:20:16,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-19 12:20:16,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-19 12:20:16,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-19 12:20:16,427 INFO L87 Difference]: Start difference. First operand 170 states and 186 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) [2021-12-19 12:20:16,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 12:20:16,806 INFO L93 Difference]: Finished difference Result 174 states and 190 transitions. [2021-12-19 12:20:16,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-19 12:20:16,807 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 [2021-12-19 12:20:16,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 12:20:16,808 INFO L225 Difference]: With dead ends: 174 [2021-12-19 12:20:16,808 INFO L226 Difference]: Without dead ends: 174 [2021-12-19 12:20:16,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-19 12:20:16,808 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 13 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-19 12:20:16,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 291 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-19 12:20:16,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-19 12:20:16,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2021-12-19 12:20:16,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 102 states have (on average 1.8235294117647058) internal successors, (186), 169 states have internal predecessors, (186), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:16,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 188 transitions. [2021-12-19 12:20:16,815 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 188 transitions. Word has length 6 [2021-12-19 12:20:16,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 12:20:16,815 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 188 transitions. [2021-12-19 12:20:16,816 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) [2021-12-19 12:20:16,816 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 188 transitions. [2021-12-19 12:20:16,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-19 12:20:16,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 12:20:16,816 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 12:20:16,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-19 12:20:17,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-19 12:20:17,030 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-19 12:20:17,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 12:20:17,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1261842348, now seen corresponding path program 1 times [2021-12-19 12:20:17,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-19 12:20:17,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545502339] [2021-12-19 12:20:17,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 12:20:17,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-19 12:20:17,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-19 12:20:17,032 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) [2021-12-19 12:20:17,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-19 12:20:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 12:20:17,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-19 12:20:17,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 12:20:17,127 INFO L388 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 [2021-12-19 12:20:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 12:20:17,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 12:20:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 12:20:17,894 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-19 12:20:17,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545502339] [2021-12-19 12:20:17,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545502339] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 12:20:17,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-19 12:20:17,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-19 12:20:17,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882239298] [2021-12-19 12:20:17,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-19 12:20:17,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-19 12:20:17,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-19 12:20:17,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-19 12:20:17,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-19 12:20:17,895 INFO L87 Difference]: Start difference. First operand 172 states and 188 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 12:20:20,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 12:20:20,329 INFO L93 Difference]: Finished difference Result 178 states and 194 transitions. [2021-12-19 12:20:20,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-19 12:20:20,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 [2021-12-19 12:20:20,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 12:20:20,331 INFO L225 Difference]: With dead ends: 178 [2021-12-19 12:20:20,331 INFO L226 Difference]: Without dead ends: 178 [2021-12-19 12:20:20,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-19 12:20:20,333 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 32 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-19 12:20:20,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 625 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-19 12:20:20,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-19 12:20:20,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-12-19 12:20:20,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 109 states have (on average 1.761467889908257) internal successors, (192), 175 states have internal predecessors, (192), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 194 transitions. [2021-12-19 12:20:20,339 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 194 transitions. Word has length 10 [2021-12-19 12:20:20,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 12:20:20,339 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 194 transitions. [2021-12-19 12:20:20,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 12:20:20,340 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 194 transitions. [2021-12-19 12:20:20,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-19 12:20:20,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 12:20:20,340 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 12:20:20,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-19 12:20:20,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-19 12:20:20,541 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-19 12:20:20,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 12:20:20,541 INFO L85 PathProgramCache]: Analyzing trace with hash 2007736717, now seen corresponding path program 1 times [2021-12-19 12:20:20,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-19 12:20:20,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129019752] [2021-12-19 12:20:20,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 12:20:20,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-19 12:20:20,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-19 12:20:20,547 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) [2021-12-19 12:20:20,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-19 12:20:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 12:20:20,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-19 12:20:20,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 12:20:20,766 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 12:20:20,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 12:20:20,858 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 12:20:20,858 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-19 12:20:20,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129019752] [2021-12-19 12:20:20,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129019752] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 12:20:20,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-19 12:20:20,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-19 12:20:20,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665061903] [2021-12-19 12:20:20,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-19 12:20:20,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-19 12:20:20,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-19 12:20:20,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-19 12:20:20,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-19 12:20:20,859 INFO L87 Difference]: Start difference. First operand 178 states and 194 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-19 12:20:21,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 12:20:21,068 INFO L93 Difference]: Finished difference Result 198 states and 214 transitions. [2021-12-19 12:20:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-19 12:20:21,069 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-12-19 12:20:21,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 12:20:21,070 INFO L225 Difference]: With dead ends: 198 [2021-12-19 12:20:21,071 INFO L226 Difference]: Without dead ends: 198 [2021-12-19 12:20:21,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-12-19 12:20:21,072 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 27 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 12:20:21,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 1268 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 12:20:21,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-19 12:20:21,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-12-19 12:20:21,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 129 states have (on average 1.6434108527131783) internal successors, (212), 195 states have internal predecessors, (212), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:21,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 214 transitions. [2021-12-19 12:20:21,080 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 214 transitions. Word has length 25 [2021-12-19 12:20:21,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 12:20:21,080 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 214 transitions. [2021-12-19 12:20:21,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-19 12:20:21,081 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 214 transitions. [2021-12-19 12:20:21,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-19 12:20:21,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 12:20:21,082 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 12:20:21,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-19 12:20:21,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-19 12:20:21,295 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-19 12:20:21,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 12:20:21,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1499348962, now seen corresponding path program 2 times [2021-12-19 12:20:21,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-19 12:20:21,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119887004] [2021-12-19 12:20:21,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 12:20:21,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-19 12:20:21,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-19 12:20:21,298 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) [2021-12-19 12:20:21,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-19 12:20:21,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-19 12:20:21,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 12:20:21,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-19 12:20:21,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 12:20:21,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-19 12:20:21,515 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-19 12:20:21,515 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 14 [2021-12-19 12:20:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-19 12:20:21,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-19 12:20:21,546 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-19 12:20:21,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119887004] [2021-12-19 12:20:21,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119887004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 12:20:21,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 12:20:21,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-19 12:20:21,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807584600] [2021-12-19 12:20:21,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 12:20:21,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-19 12:20:21,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-19 12:20:21,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-19 12:20:21,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-19 12:20:21,548 INFO L87 Difference]: Start difference. First operand 198 states and 214 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:21,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 12:20:21,795 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2021-12-19 12:20:21,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-19 12:20:21,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-12-19 12:20:21,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 12:20:21,797 INFO L225 Difference]: With dead ends: 209 [2021-12-19 12:20:21,797 INFO L226 Difference]: Without dead ends: 209 [2021-12-19 12:20:21,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-19 12:20:21,798 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 147 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-19 12:20:21,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 149 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-19 12:20:21,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-19 12:20:21,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 193. [2021-12-19 12:20:21,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 129 states have (on average 1.6046511627906976) internal successors, (207), 190 states have internal predecessors, (207), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 209 transitions. [2021-12-19 12:20:21,806 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 209 transitions. Word has length 45 [2021-12-19 12:20:21,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 12:20:21,806 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 209 transitions. [2021-12-19 12:20:21,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:21,807 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 209 transitions. [2021-12-19 12:20:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-19 12:20:21,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 12:20:21,808 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 12:20:21,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-19 12:20:22,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-19 12:20:22,008 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-19 12:20:22,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 12:20:22,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1499348961, now seen corresponding path program 1 times [2021-12-19 12:20:22,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-19 12:20:22,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007274560] [2021-12-19 12:20:22,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 12:20:22,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-19 12:20:22,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-19 12:20:22,010 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) [2021-12-19 12:20:22,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-19 12:20:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 12:20:22,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-19 12:20:22,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 12:20:22,373 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 12:20:22,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 12:20:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 12:20:22,591 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-19 12:20:22,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007274560] [2021-12-19 12:20:22,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007274560] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 12:20:22,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-19 12:20:22,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-12-19 12:20:22,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670364395] [2021-12-19 12:20:22,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-19 12:20:22,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-19 12:20:22,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-19 12:20:22,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-19 12:20:22,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-12-19 12:20:22,592 INFO L87 Difference]: Start difference. First operand 193 states and 209 transitions. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-19 12:20:22,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 12:20:22,896 INFO L93 Difference]: Finished difference Result 201 states and 217 transitions. [2021-12-19 12:20:22,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-19 12:20:22,897 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2021-12-19 12:20:22,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 12:20:22,898 INFO L225 Difference]: With dead ends: 201 [2021-12-19 12:20:22,898 INFO L226 Difference]: Without dead ends: 201 [2021-12-19 12:20:22,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-12-19 12:20:22,898 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 33 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1813 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-19 12:20:22,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 1813 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-19 12:20:22,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-19 12:20:22,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-12-19 12:20:22,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 137 states have (on average 1.5693430656934306) internal successors, (215), 198 states have internal predecessors, (215), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:22,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 217 transitions. [2021-12-19 12:20:22,902 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 217 transitions. Word has length 45 [2021-12-19 12:20:22,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 12:20:22,903 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 217 transitions. [2021-12-19 12:20:22,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-19 12:20:22,903 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 217 transitions. [2021-12-19 12:20:22,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-19 12:20:22,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 12:20:22,906 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 12:20:22,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-19 12:20:23,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-19 12:20:23,115 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-19 12:20:23,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 12:20:23,115 INFO L85 PathProgramCache]: Analyzing trace with hash 621817561, now seen corresponding path program 2 times [2021-12-19 12:20:23,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-19 12:20:23,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011009310] [2021-12-19 12:20:23,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 12:20:23,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-19 12:20:23,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-19 12:20:23,117 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) [2021-12-19 12:20:23,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-19 12:20:23,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-19 12:20:23,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 12:20:23,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-19 12:20:23,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 12:20:23,328 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-19 12:20:23,328 INFO L388 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 1 case distinctions, treesize of input 19 treesize of output 21 [2021-12-19 12:20:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-19 12:20:23,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-19 12:20:23,370 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-19 12:20:23,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011009310] [2021-12-19 12:20:23,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011009310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 12:20:23,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 12:20:23,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-19 12:20:23,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059784410] [2021-12-19 12:20:23,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 12:20:23,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-19 12:20:23,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-19 12:20:23,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-19 12:20:23,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-19 12:20:23,371 INFO L87 Difference]: Start difference. First operand 201 states and 217 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:24,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 12:20:24,321 INFO L93 Difference]: Finished difference Result 321 states and 351 transitions. [2021-12-19 12:20:24,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-19 12:20:24,322 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-12-19 12:20:24,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 12:20:24,323 INFO L225 Difference]: With dead ends: 321 [2021-12-19 12:20:24,323 INFO L226 Difference]: Without dead ends: 321 [2021-12-19 12:20:24,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-19 12:20:24,324 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 436 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-19 12:20:24,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 484 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-19 12:20:24,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-12-19 12:20:24,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 265. [2021-12-19 12:20:24,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 202 states have (on average 1.6732673267326732) internal successors, (338), 262 states have internal predecessors, (338), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 340 transitions. [2021-12-19 12:20:24,328 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 340 transitions. Word has length 53 [2021-12-19 12:20:24,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 12:20:24,328 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 340 transitions. [2021-12-19 12:20:24,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:24,328 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 340 transitions. [2021-12-19 12:20:24,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-19 12:20:24,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 12:20:24,329 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 12:20:24,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-19 12:20:24,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-19 12:20:24,536 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-19 12:20:24,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 12:20:24,536 INFO L85 PathProgramCache]: Analyzing trace with hash 372982570, now seen corresponding path program 1 times [2021-12-19 12:20:24,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-19 12:20:24,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024111402] [2021-12-19 12:20:24,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 12:20:24,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-19 12:20:24,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-19 12:20:24,538 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) [2021-12-19 12:20:24,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-19 12:20:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 12:20:24,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-19 12:20:24,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 12:20:25,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-19 12:20:25,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-19 12:20:25,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-19 12:20:25,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-19 12:20:25,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-19 12:20:25,188 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-19 12:20:25,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-19 12:20:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-19 12:20:25,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-19 12:20:25,225 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-19 12:20:25,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024111402] [2021-12-19 12:20:25,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024111402] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 12:20:25,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 12:20:25,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-19 12:20:25,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703694406] [2021-12-19 12:20:25,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 12:20:25,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-19 12:20:25,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-19 12:20:25,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-19 12:20:25,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-19 12:20:25,226 INFO L87 Difference]: Start difference. First operand 265 states and 340 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:25,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 12:20:25,280 INFO L93 Difference]: Finished difference Result 266 states and 341 transitions. [2021-12-19 12:20:25,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-19 12:20:25,281 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-12-19 12:20:25,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 12:20:25,282 INFO L225 Difference]: With dead ends: 266 [2021-12-19 12:20:25,282 INFO L226 Difference]: Without dead ends: 266 [2021-12-19 12:20:25,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-19 12:20:25,282 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 4 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-19 12:20:25,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 864 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 166 Unchecked, 0.0s Time] [2021-12-19 12:20:25,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-19 12:20:25,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2021-12-19 12:20:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 203 states have (on average 1.6699507389162562) internal successors, (339), 263 states have internal predecessors, (339), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:25,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 341 transitions. [2021-12-19 12:20:25,288 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 341 transitions. Word has length 56 [2021-12-19 12:20:25,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 12:20:25,289 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 341 transitions. [2021-12-19 12:20:25,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:25,289 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 341 transitions. [2021-12-19 12:20:25,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-19 12:20:25,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 12:20:25,291 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 12:20:25,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-19 12:20:25,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-19 12:20:25,495 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-19 12:20:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 12:20:25,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1322442817, now seen corresponding path program 1 times [2021-12-19 12:20:25,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-19 12:20:25,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686357508] [2021-12-19 12:20:25,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 12:20:25,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-19 12:20:25,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-19 12:20:25,499 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) [2021-12-19 12:20:25,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-19 12:20:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 12:20:25,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-19 12:20:25,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 12:20:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-19 12:20:25,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-19 12:20:25,758 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-19 12:20:25,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686357508] [2021-12-19 12:20:25,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686357508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 12:20:25,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 12:20:25,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-19 12:20:25,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385809592] [2021-12-19 12:20:25,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 12:20:25,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-19 12:20:25,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-19 12:20:25,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-19 12:20:25,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-19 12:20:25,760 INFO L87 Difference]: Start difference. First operand 266 states and 341 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:26,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 12:20:26,089 INFO L93 Difference]: Finished difference Result 284 states and 363 transitions. [2021-12-19 12:20:26,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-19 12:20:26,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-12-19 12:20:26,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 12:20:26,091 INFO L225 Difference]: With dead ends: 284 [2021-12-19 12:20:26,091 INFO L226 Difference]: Without dead ends: 284 [2021-12-19 12:20:26,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-19 12:20:26,091 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 246 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-19 12:20:26,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 186 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-19 12:20:26,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-19 12:20:26,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 260. [2021-12-19 12:20:26,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 203 states have (on average 1.6108374384236452) internal successors, (327), 257 states have internal predecessors, (327), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 329 transitions. [2021-12-19 12:20:26,095 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 329 transitions. Word has length 57 [2021-12-19 12:20:26,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 12:20:26,095 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 329 transitions. [2021-12-19 12:20:26,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:26,096 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 329 transitions. [2021-12-19 12:20:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-19 12:20:26,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 12:20:26,096 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 12:20:26,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-19 12:20:26,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-19 12:20:26,297 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-19 12:20:26,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 12:20:26,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1322442816, now seen corresponding path program 1 times [2021-12-19 12:20:26,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-19 12:20:26,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160973631] [2021-12-19 12:20:26,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 12:20:26,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-19 12:20:26,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-19 12:20:26,299 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) [2021-12-19 12:20:26,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-19 12:20:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 12:20:26,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-19 12:20:26,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 12:20:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-19 12:20:26,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-19 12:20:26,637 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-19 12:20:26,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160973631] [2021-12-19 12:20:26,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160973631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 12:20:26,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 12:20:26,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-19 12:20:26,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588107655] [2021-12-19 12:20:26,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 12:20:26,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-19 12:20:26,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-19 12:20:26,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-19 12:20:26,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-19 12:20:26,640 INFO L87 Difference]: Start difference. First operand 260 states and 329 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:26,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 12:20:26,852 INFO L93 Difference]: Finished difference Result 218 states and 235 transitions. [2021-12-19 12:20:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-19 12:20:26,852 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-12-19 12:20:26,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 12:20:26,853 INFO L225 Difference]: With dead ends: 218 [2021-12-19 12:20:26,853 INFO L226 Difference]: Without dead ends: 218 [2021-12-19 12:20:26,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-19 12:20:26,854 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 182 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-19 12:20:26,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 617 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-19 12:20:26,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-19 12:20:26,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 196. [2021-12-19 12:20:26,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 139 states have (on average 1.5107913669064748) internal successors, (210), 193 states have internal predecessors, (210), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:26,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 212 transitions. [2021-12-19 12:20:26,857 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 212 transitions. Word has length 57 [2021-12-19 12:20:26,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 12:20:26,857 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 212 transitions. [2021-12-19 12:20:26,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:26,857 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 212 transitions. [2021-12-19 12:20:26,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-19 12:20:26,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 12:20:26,858 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 12:20:26,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-19 12:20:27,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-19 12:20:27,058 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-19 12:20:27,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 12:20:27,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1953963627, now seen corresponding path program 1 times [2021-12-19 12:20:27,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-19 12:20:27,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227193935] [2021-12-19 12:20:27,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 12:20:27,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-19 12:20:27,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-19 12:20:27,060 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) [2021-12-19 12:20:27,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-19 12:20:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 12:20:27,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-19 12:20:27,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 12:20:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-19 12:20:27,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-19 12:20:27,400 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-19 12:20:27,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227193935] [2021-12-19 12:20:27,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227193935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 12:20:27,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 12:20:27,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-19 12:20:27,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284980618] [2021-12-19 12:20:27,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 12:20:27,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-19 12:20:27,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-19 12:20:27,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-19 12:20:27,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-19 12:20:27,402 INFO L87 Difference]: Start difference. First operand 196 states and 212 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:27,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 12:20:27,560 INFO L93 Difference]: Finished difference Result 214 states and 231 transitions. [2021-12-19 12:20:27,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-19 12:20:27,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-12-19 12:20:27,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 12:20:27,562 INFO L225 Difference]: With dead ends: 214 [2021-12-19 12:20:27,562 INFO L226 Difference]: Without dead ends: 214 [2021-12-19 12:20:27,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-19 12:20:27,562 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 214 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-19 12:20:27,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 306 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-19 12:20:27,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-19 12:20:27,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 207. [2021-12-19 12:20:27,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 151 states have (on average 1.509933774834437) internal successors, (228), 204 states have internal predecessors, (228), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 230 transitions. [2021-12-19 12:20:27,565 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 230 transitions. Word has length 58 [2021-12-19 12:20:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 12:20:27,565 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 230 transitions. [2021-12-19 12:20:27,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:27,566 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 230 transitions. [2021-12-19 12:20:27,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-19 12:20:27,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 12:20:27,566 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 12:20:27,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-19 12:20:27,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-19 12:20:27,780 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-19 12:20:27,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 12:20:27,780 INFO L85 PathProgramCache]: Analyzing trace with hash 443330279, now seen corresponding path program 1 times [2021-12-19 12:20:27,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-19 12:20:27,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340581783] [2021-12-19 12:20:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 12:20:27,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-19 12:20:27,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-19 12:20:27,782 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) [2021-12-19 12:20:27,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-19 12:20:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 12:20:28,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-19 12:20:28,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 12:20:28,311 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-19 12:20:28,312 INFO L388 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 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-19 12:20:28,331 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-19 12:20:28,331 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 18 [2021-12-19 12:20:28,466 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-19 12:20:28,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-19 12:20:28,497 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-19 12:20:28,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-19 12:20:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-19 12:20:28,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-19 12:20:28,616 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-19 12:20:28,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340581783] [2021-12-19 12:20:28,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340581783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 12:20:28,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 12:20:28,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-19 12:20:28,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333689604] [2021-12-19 12:20:28,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 12:20:28,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-19 12:20:28,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-19 12:20:28,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-19 12:20:28,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-19 12:20:28,617 INFO L87 Difference]: Start difference. First operand 207 states and 230 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:28,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 12:20:28,681 INFO L93 Difference]: Finished difference Result 207 states and 229 transitions. [2021-12-19 12:20:28,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-19 12:20:28,682 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-12-19 12:20:28,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 12:20:28,682 INFO L225 Difference]: With dead ends: 207 [2021-12-19 12:20:28,682 INFO L226 Difference]: Without dead ends: 207 [2021-12-19 12:20:28,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-19 12:20:28,683 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 4 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-19 12:20:28,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 896 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 246 Unchecked, 0.0s Time] [2021-12-19 12:20:28,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-19 12:20:28,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2021-12-19 12:20:28,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 151 states have (on average 1.5033112582781456) internal successors, (227), 204 states have internal predecessors, (227), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:28,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 229 transitions. [2021-12-19 12:20:28,686 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 229 transitions. Word has length 59 [2021-12-19 12:20:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 12:20:28,687 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 229 transitions. [2021-12-19 12:20:28,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:28,687 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 229 transitions. [2021-12-19 12:20:28,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-19 12:20:28,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 12:20:28,687 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 12:20:28,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-19 12:20:28,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-19 12:20:28,896 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-19 12:20:28,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 12:20:28,896 INFO L85 PathProgramCache]: Analyzing trace with hash 443330278, now seen corresponding path program 1 times [2021-12-19 12:20:28,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-19 12:20:28,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553483902] [2021-12-19 12:20:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 12:20:28,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-19 12:20:28,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-19 12:20:28,898 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) [2021-12-19 12:20:28,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-19 12:20:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 12:20:29,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-19 12:20:29,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 12:20:29,332 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-19 12:20:29,332 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 18 [2021-12-19 12:20:29,356 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-19 12:20:29,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2021-12-19 12:20:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-19 12:20:29,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-19 12:20:29,368 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-19 12:20:29,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553483902] [2021-12-19 12:20:29,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553483902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 12:20:29,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 12:20:29,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-19 12:20:29,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811152573] [2021-12-19 12:20:29,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 12:20:29,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-19 12:20:29,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-19 12:20:29,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-19 12:20:29,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-19 12:20:29,369 INFO L87 Difference]: Start difference. First operand 207 states and 229 transitions. Second operand has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:29,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 12:20:29,594 INFO L93 Difference]: Finished difference Result 214 states and 236 transitions. [2021-12-19 12:20:29,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-19 12:20:29,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-12-19 12:20:29,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 12:20:29,595 INFO L225 Difference]: With dead ends: 214 [2021-12-19 12:20:29,595 INFO L226 Difference]: Without dead ends: 214 [2021-12-19 12:20:29,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-19 12:20:29,595 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 132 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-19 12:20:29,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 145 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-19 12:20:29,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-19 12:20:29,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 211. [2021-12-19 12:20:29,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 156 states have (on average 1.5) internal successors, (234), 208 states have internal predecessors, (234), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:29,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 236 transitions. [2021-12-19 12:20:29,599 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 236 transitions. Word has length 59 [2021-12-19 12:20:29,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 12:20:29,600 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 236 transitions. [2021-12-19 12:20:29,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:29,600 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 236 transitions. [2021-12-19 12:20:29,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-19 12:20:29,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 12:20:29,601 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 12:20:29,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-19 12:20:29,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-19 12:20:29,801 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-19 12:20:29,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 12:20:29,802 INFO L85 PathProgramCache]: Analyzing trace with hash 227895600, now seen corresponding path program 1 times [2021-12-19 12:20:29,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-19 12:20:29,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736236342] [2021-12-19 12:20:29,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 12:20:29,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-19 12:20:29,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-19 12:20:29,803 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) [2021-12-19 12:20:29,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-19 12:20:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 12:20:30,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-19 12:20:30,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 12:20:30,307 INFO L388 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 [2021-12-19 12:20:30,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-19 12:20:30,426 INFO L354 Elim1Store]: treesize reduction 46, result has 20.7 percent of original size [2021-12-19 12:20:30,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 31 [2021-12-19 12:20:30,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 12 [2021-12-19 12:20:30,487 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-19 12:20:30,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-19 12:20:30,487 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-19 12:20:30,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736236342] [2021-12-19 12:20:30,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736236342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 12:20:30,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 12:20:30,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-19 12:20:30,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177386837] [2021-12-19 12:20:30,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 12:20:30,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-19 12:20:30,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-19 12:20:30,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-19 12:20:30,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-19 12:20:30,488 INFO L87 Difference]: Start difference. First operand 211 states and 236 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:31,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 12:20:31,047 INFO L93 Difference]: Finished difference Result 209 states and 232 transitions. [2021-12-19 12:20:31,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-19 12:20:31,050 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-12-19 12:20:31,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 12:20:31,050 INFO L225 Difference]: With dead ends: 209 [2021-12-19 12:20:31,050 INFO L226 Difference]: Without dead ends: 209 [2021-12-19 12:20:31,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-19 12:20:31,051 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 154 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-19 12:20:31,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 551 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-19 12:20:31,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-19 12:20:31,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-12-19 12:20:31,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 156 states have (on average 1.4743589743589745) internal successors, (230), 206 states have internal predecessors, (230), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:31,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 232 transitions. [2021-12-19 12:20:31,054 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 232 transitions. Word has length 62 [2021-12-19 12:20:31,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 12:20:31,054 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 232 transitions. [2021-12-19 12:20:31,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:31,054 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 232 transitions. [2021-12-19 12:20:31,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-19 12:20:31,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 12:20:31,055 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 12:20:31,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-19 12:20:31,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-19 12:20:31,256 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-19 12:20:31,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 12:20:31,256 INFO L85 PathProgramCache]: Analyzing trace with hash 227895601, now seen corresponding path program 1 times [2021-12-19 12:20:31,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-19 12:20:31,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219927028] [2021-12-19 12:20:31,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 12:20:31,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-19 12:20:31,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-19 12:20:31,259 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) [2021-12-19 12:20:31,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-19 12:20:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 12:20:31,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-19 12:20:31,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 12:20:31,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-19 12:20:31,805 INFO L388 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 [2021-12-19 12:20:31,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-19 12:20:31,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-19 12:20:31,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2021-12-19 12:20:31,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-19 12:20:31,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 9 [2021-12-19 12:20:31,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-12-19 12:20:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-19 12:20:31,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-19 12:20:31,975 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-19 12:20:31,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219927028] [2021-12-19 12:20:31,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219927028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 12:20:31,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 12:20:31,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-19 12:20:31,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047652385] [2021-12-19 12:20:31,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 12:20:31,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-19 12:20:31,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-19 12:20:31,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-19 12:20:31,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-19 12:20:31,976 INFO L87 Difference]: Start difference. First operand 209 states and 232 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:32,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 12:20:32,789 INFO L93 Difference]: Finished difference Result 208 states and 230 transitions. [2021-12-19 12:20:32,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-19 12:20:32,790 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-12-19 12:20:32,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 12:20:32,791 INFO L225 Difference]: With dead ends: 208 [2021-12-19 12:20:32,791 INFO L226 Difference]: Without dead ends: 208 [2021-12-19 12:20:32,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-19 12:20:32,791 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 161 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-19 12:20:32,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 439 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-19 12:20:32,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-19 12:20:32,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-12-19 12:20:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 156 states have (on average 1.4615384615384615) internal successors, (228), 205 states have internal predecessors, (228), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 230 transitions. [2021-12-19 12:20:32,794 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 230 transitions. Word has length 62 [2021-12-19 12:20:32,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 12:20:32,794 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 230 transitions. [2021-12-19 12:20:32,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:32,795 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 230 transitions. [2021-12-19 12:20:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-19 12:20:32,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 12:20:32,795 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 12:20:32,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-19 12:20:32,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-19 12:20:32,996 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-19 12:20:32,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 12:20:32,996 INFO L85 PathProgramCache]: Analyzing trace with hash 90810075, now seen corresponding path program 1 times [2021-12-19 12:20:32,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-19 12:20:32,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859544920] [2021-12-19 12:20:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 12:20:32,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-19 12:20:32,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-19 12:20:32,998 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) [2021-12-19 12:20:32,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-19 12:20:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 12:20:33,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-19 12:20:33,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 12:20:33,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-19 12:20:33,537 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-19 12:20:33,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-19 12:20:33,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-19 12:20:33,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 37 [2021-12-19 12:20:33,716 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-19 12:20:33,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 47 [2021-12-19 12:20:33,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-12-19 12:20:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-19 12:20:33,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-19 12:20:33,773 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-19 12:20:33,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859544920] [2021-12-19 12:20:33,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859544920] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 12:20:33,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 12:20:33,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-19 12:20:33,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882309412] [2021-12-19 12:20:33,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 12:20:33,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-19 12:20:33,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-19 12:20:33,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-19 12:20:33,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-19 12:20:33,779 INFO L87 Difference]: Start difference. First operand 208 states and 230 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 12:20:34,616 INFO L93 Difference]: Finished difference Result 229 states and 252 transitions. [2021-12-19 12:20:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-19 12:20:34,617 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-12-19 12:20:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 12:20:34,618 INFO L225 Difference]: With dead ends: 229 [2021-12-19 12:20:34,618 INFO L226 Difference]: Without dead ends: 229 [2021-12-19 12:20:34,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-12-19 12:20:34,618 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 185 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-19 12:20:34,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 592 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 322 Invalid, 0 Unknown, 80 Unchecked, 0.7s Time] [2021-12-19 12:20:34,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-19 12:20:34,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 217. [2021-12-19 12:20:34,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 165 states have (on average 1.4727272727272727) internal successors, (243), 214 states have internal predecessors, (243), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 245 transitions. [2021-12-19 12:20:34,621 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 245 transitions. Word has length 66 [2021-12-19 12:20:34,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 12:20:34,621 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 245 transitions. [2021-12-19 12:20:34,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:34,621 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 245 transitions. [2021-12-19 12:20:34,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-19 12:20:34,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 12:20:34,623 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 12:20:34,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-19 12:20:34,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-19 12:20:34,832 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-19 12:20:34,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 12:20:34,832 INFO L85 PathProgramCache]: Analyzing trace with hash 90810076, now seen corresponding path program 1 times [2021-12-19 12:20:34,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-19 12:20:34,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1479421046] [2021-12-19 12:20:34,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 12:20:34,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-19 12:20:34,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-19 12:20:34,834 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) [2021-12-19 12:20:34,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-19 12:20:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 12:20:35,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-19 12:20:35,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 12:20:35,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-19 12:20:35,451 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-19 12:20:35,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-19 12:20:35,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-19 12:20:35,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-19 12:20:35,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-19 12:20:35,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-19 12:20:35,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-19 12:20:35,694 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-19 12:20:35,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 57 [2021-12-19 12:20:35,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-12-19 12:20:35,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 13 [2021-12-19 12:20:35,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-12-19 12:20:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-19 12:20:35,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-19 12:20:35,817 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-19 12:20:35,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1479421046] [2021-12-19 12:20:35,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1479421046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 12:20:35,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 12:20:35,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-19 12:20:35,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686150122] [2021-12-19 12:20:35,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 12:20:35,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-19 12:20:35,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-19 12:20:35,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-19 12:20:35,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-19 12:20:35,819 INFO L87 Difference]: Start difference. First operand 217 states and 245 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:36,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 12:20:36,908 INFO L93 Difference]: Finished difference Result 229 states and 249 transitions. [2021-12-19 12:20:36,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-19 12:20:36,909 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-12-19 12:20:36,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 12:20:36,910 INFO L225 Difference]: With dead ends: 229 [2021-12-19 12:20:36,910 INFO L226 Difference]: Without dead ends: 229 [2021-12-19 12:20:36,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-19 12:20:36,910 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 191 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-19 12:20:36,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 385 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-19 12:20:36,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-19 12:20:36,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 217. [2021-12-19 12:20:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 165 states have (on average 1.4484848484848485) internal successors, (239), 214 states have internal predecessors, (239), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 241 transitions. [2021-12-19 12:20:36,913 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 241 transitions. Word has length 66 [2021-12-19 12:20:36,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 12:20:36,913 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 241 transitions. [2021-12-19 12:20:36,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 12:20:36,913 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 241 transitions. [2021-12-19 12:20:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-19 12:20:36,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 12:20:36,914 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 12:20:36,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-19 12:20:37,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-19 12:20:37,126 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-19 12:20:37,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 12:20:37,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1330037336, now seen corresponding path program 1 times [2021-12-19 12:20:37,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-19 12:20:37,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550800901] [2021-12-19 12:20:37,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 12:20:37,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-19 12:20:37,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-19 12:20:37,128 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) [2021-12-19 12:20:37,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-19 12:20:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 12:20:37,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-19 12:20:37,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 12:20:37,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-19 12:20:37,801 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-19 12:20:37,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-19 12:20:37,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-19 12:20:37,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 37 [2021-12-19 12:20:37,999 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-19 12:20:38,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 47 [2021-12-19 12:20:38,093 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-19 12:20:38,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 47 [2021-12-19 12:20:38,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-12-19 12:20:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-19 12:20:38,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 12:20:38,245 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1339 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem146#1.base| v_ArrVal_1339) |c_ULTIMATE.start_main_~argv~0#1.base|) (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (_ bv1 1)))) is different from false [2021-12-19 12:20:38,274 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1339 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (select |c_#valid| (let ((.cse0 (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse0) v_ArrVal_1339) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse0))) (_ bv1 1)))) is different from false [2021-12-19 12:20:38,303 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1338 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1339 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (select |c_#valid| (let ((.cse1 (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem144#1.base| v_ArrVal_1338))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1339)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))) (_ bv1 1)))) is different from false [2021-12-19 12:20:38,317 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1338 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1339 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (select |c_#valid| (let ((.cse1 (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1338))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1339)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))) (_ bv1 1)))) is different from false [2021-12-19 12:20:38,337 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1338 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1337 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1339 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (select |c_#valid| (let ((.cse1 (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~mem_track~0#1.base| v_ArrVal_1337))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1338)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1339)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))) (_ bv1 1)))) is different from false [2021-12-19 12:20:38,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-19 12:20:38,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 78 [2021-12-19 12:20:38,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5301 treesize of output 3924 [2021-12-19 12:20:38,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3920 treesize of output 3304 [2021-12-19 12:20:38,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3304 treesize of output 2604 [2021-12-19 12:20:38,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2604 treesize of output 2548 Killed by 15