./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- 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/array-memsafety/stroeder2-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eb1b14e8511764ce20ab6a88d1bf2bef8398fca052e797a3c06b53051dc2f2a5 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 20:03:34,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 20:03:34,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 20:03:34,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 20:03:34,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 20:03:34,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 20:03:34,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 20:03:34,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 20:03:34,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 20:03:34,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 20:03:34,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 20:03:34,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 20:03:34,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 20:03:34,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 20:03:34,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 20:03:34,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 20:03:34,447 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 20:03:34,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 20:03:34,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 20:03:34,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 20:03:34,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 20:03:34,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 20:03:34,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 20:03:34,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 20:03:34,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 20:03:34,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 20:03:34,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 20:03:34,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 20:03:34,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 20:03:34,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 20:03:34,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 20:03:34,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 20:03:34,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 20:03:34,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 20:03:34,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 20:03:34,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 20:03:34,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 20:03:34,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 20:03:34,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 20:03:34,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 20:03:34,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 20:03:34,472 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 20:03:34,502 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 20:03:34,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 20:03:34,503 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 20:03:34,503 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 20:03:34,504 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 20:03:34,504 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 20:03:34,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 20:03:34,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 20:03:34,505 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 20:03:34,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 20:03:34,506 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 20:03:34,506 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 20:03:34,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 20:03:34,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 20:03:34,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 20:03:34,507 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 20:03:34,507 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 20:03:34,507 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 20:03:34,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 20:03:34,507 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 20:03:34,507 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 20:03:34,508 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 20:03:34,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 20:03:34,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 20:03:34,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 20:03:34,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 20:03:34,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 20:03:34,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 20:03:34,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 20:03:34,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 20:03:34,510 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 20:03:34,510 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb1b14e8511764ce20ab6a88d1bf2bef8398fca052e797a3c06b53051dc2f2a5 [2021-12-18 20:03:34,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 20:03:34,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 20:03:34,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 20:03:34,708 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 20:03:34,708 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 20:03:34,709 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i [2021-12-18 20:03:34,752 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5e90d009/b6d9920585d8491daa18f54436e8cafb/FLAGcbc902f9c [2021-12-18 20:03:35,113 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 20:03:35,118 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i [2021-12-18 20:03:35,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5e90d009/b6d9920585d8491daa18f54436e8cafb/FLAGcbc902f9c [2021-12-18 20:03:35,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5e90d009/b6d9920585d8491daa18f54436e8cafb [2021-12-18 20:03:35,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 20:03:35,146 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 20:03:35,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 20:03:35,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 20:03:35,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 20:03:35,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:03:35" (1/1) ... [2021-12-18 20:03:35,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d296baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:03:35, skipping insertion in model container [2021-12-18 20:03:35,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:03:35" (1/1) ... [2021-12-18 20:03:35,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 20:03:35,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 20:03:35,376 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 20:03:35,383 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) [2021-12-18 20:03:35,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@697f6a7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:03:35, skipping insertion in model container [2021-12-18 20:03:35,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 20:03:35,384 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-18 20:03:35,386 INFO L158 Benchmark]: Toolchain (without parser) took 238.72ms. Allocated memory is still 102.8MB. Free memory was 75.3MB in the beginning and 77.0MB in the end (delta: -1.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-18 20:03:35,387 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 102.8MB. Free memory was 60.4MB in the beginning and 60.4MB in the end (delta: 49.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 20:03:35,388 INFO L158 Benchmark]: CACSL2BoogieTranslator took 236.71ms. Allocated memory is still 102.8MB. Free memory was 75.0MB in the beginning and 77.0MB in the end (delta: -2.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-18 20:03:35,389 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 102.8MB. Free memory was 60.4MB in the beginning and 60.4MB in the end (delta: 49.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 236.71ms. Allocated memory is still 102.8MB. Free memory was 75.0MB in the beginning and 77.0MB in the end (delta: -2.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 532]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eb1b14e8511764ce20ab6a88d1bf2bef8398fca052e797a3c06b53051dc2f2a5 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 20:03:36,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 20:03:36,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 20:03:36,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 20:03:36,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 20:03:36,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 20:03:36,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 20:03:36,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 20:03:36,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 20:03:36,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 20:03:36,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 20:03:36,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 20:03:36,746 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 20:03:36,747 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 20:03:36,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 20:03:36,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 20:03:36,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 20:03:36,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 20:03:36,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 20:03:36,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 20:03:36,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 20:03:36,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 20:03:36,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 20:03:36,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 20:03:36,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 20:03:36,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 20:03:36,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 20:03:36,766 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 20:03:36,766 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 20:03:36,767 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 20:03:36,768 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 20:03:36,768 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 20:03:36,769 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 20:03:36,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 20:03:36,771 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 20:03:36,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 20:03:36,772 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 20:03:36,772 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 20:03:36,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 20:03:36,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 20:03:36,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 20:03:36,775 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-18 20:03:36,798 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 20:03:36,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 20:03:36,799 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 20:03:36,800 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 20:03:36,800 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 20:03:36,800 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 20:03:36,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 20:03:36,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 20:03:36,802 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 20:03:36,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 20:03:36,802 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 20:03:36,803 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 20:03:36,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 20:03:36,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 20:03:36,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 20:03:36,803 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 20:03:36,803 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 20:03:36,803 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 20:03:36,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 20:03:36,804 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 20:03:36,804 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-18 20:03:36,804 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-18 20:03:36,804 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 20:03:36,804 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 20:03:36,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 20:03:36,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 20:03:36,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 20:03:36,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 20:03:36,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 20:03:36,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 20:03:36,806 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-18 20:03:36,806 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-18 20:03:36,806 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 20:03:36,806 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-18 20:03:36,806 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb1b14e8511764ce20ab6a88d1bf2bef8398fca052e797a3c06b53051dc2f2a5 [2021-12-18 20:03:37,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 20:03:37,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 20:03:37,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 20:03:37,039 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 20:03:37,039 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 20:03:37,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i [2021-12-18 20:03:37,084 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8323d4d5d/c0b67402d17c41f1945fa77cac192450/FLAG8a710d308 [2021-12-18 20:03:37,442 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 20:03:37,443 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i [2021-12-18 20:03:37,459 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8323d4d5d/c0b67402d17c41f1945fa77cac192450/FLAG8a710d308 [2021-12-18 20:03:37,467 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8323d4d5d/c0b67402d17c41f1945fa77cac192450 [2021-12-18 20:03:37,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 20:03:37,470 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 20:03:37,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 20:03:37,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 20:03:37,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 20:03:37,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:03:37" (1/1) ... [2021-12-18 20:03:37,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1004cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:03:37, skipping insertion in model container [2021-12-18 20:03:37,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:03:37" (1/1) ... [2021-12-18 20:03:37,481 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 20:03:37,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 20:03:37,732 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 20:03:37,738 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-18 20:03:37,746 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 20:03:37,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 20:03:37,790 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 20:03:37,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 20:03:37,851 INFO L208 MainTranslator]: Completed translation [2021-12-18 20:03:37,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:03:37 WrapperNode [2021-12-18 20:03:37,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 20:03:37,857 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 20:03:37,857 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 20:03:37,857 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 20:03:37,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:03:37" (1/1) ... [2021-12-18 20:03:37,870 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:03:37" (1/1) ... [2021-12-18 20:03:37,881 INFO L137 Inliner]: procedures = 119, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2021-12-18 20:03:37,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 20:03:37,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 20:03:37,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 20:03:37,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 20:03:37,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:03:37" (1/1) ... [2021-12-18 20:03:37,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:03:37" (1/1) ... [2021-12-18 20:03:37,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:03:37" (1/1) ... [2021-12-18 20:03:37,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:03:37" (1/1) ... [2021-12-18 20:03:37,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:03:37" (1/1) ... [2021-12-18 20:03:37,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:03:37" (1/1) ... [2021-12-18 20:03:37,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:03:37" (1/1) ... [2021-12-18 20:03:37,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 20:03:37,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 20:03:37,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 20:03:37,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 20:03:37,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:03:37" (1/1) ... [2021-12-18 20:03:37,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 20:03:37,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:03:37,932 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) [2021-12-18 20:03:37,947 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 [2021-12-18 20:03:37,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-18 20:03:37,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 20:03:37,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-18 20:03:37,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 20:03:37,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-18 20:03:37,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 20:03:37,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 20:03:38,044 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 20:03:38,046 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 20:03:38,214 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 20:03:38,219 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 20:03:38,219 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-18 20:03:38,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:03:38 BoogieIcfgContainer [2021-12-18 20:03:38,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 20:03:38,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 20:03:38,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 20:03:38,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 20:03:38,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 08:03:37" (1/3) ... [2021-12-18 20:03:38,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b3a8cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:03:38, skipping insertion in model container [2021-12-18 20:03:38,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:03:37" (2/3) ... [2021-12-18 20:03:38,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b3a8cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:03:38, skipping insertion in model container [2021-12-18 20:03:38,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:03:38" (3/3) ... [2021-12-18 20:03:38,247 INFO L111 eAbstractionObserver]: Analyzing ICFG stroeder2-alloca-1.i [2021-12-18 20:03:38,251 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 20:03:38,251 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-12-18 20:03:38,285 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 20:03:38,291 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 [2021-12-18 20:03:38,291 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-12-18 20:03:38,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:38,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 20:03:38,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:38,308 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 20:03:38,309 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:03:38,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:38,312 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-12-18 20:03:38,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:03:38,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430876227] [2021-12-18 20:03:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:38,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:03:38,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:03:38,323 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) [2021-12-18 20:03:38,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-18 20:03:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:38,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 20:03:38,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:38,488 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 [2021-12-18 20:03:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:38,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:03:38,501 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:03:38,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430876227] [2021-12-18 20:03:38,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430876227] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:03:38,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:03:38,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:03:38,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038170712] [2021-12-18 20:03:38,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:03:38,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:03:38,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:03:38,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:03:38,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:03:38,529 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:38,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:38,573 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-12-18 20:03:38,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:03:38,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-18 20:03:38,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:38,581 INFO L225 Difference]: With dead ends: 30 [2021-12-18 20:03:38,581 INFO L226 Difference]: Without dead ends: 28 [2021-12-18 20:03:38,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:03:38,584 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:38,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:03:38,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-18 20:03:38,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-18 20:03:38,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.55) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:38,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-12-18 20:03:38,606 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 6 [2021-12-18 20:03:38,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:38,606 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-12-18 20:03:38,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:38,607 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-12-18 20:03:38,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 20:03:38,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:38,607 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 20:03:38,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:38,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:03:38,816 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:03:38,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:38,816 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-12-18 20:03:38,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:03:38,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323579396] [2021-12-18 20:03:38,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:38,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:03:38,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:03:38,819 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) [2021-12-18 20:03:38,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-18 20:03:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:38,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 20:03:38,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:38,897 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 [2021-12-18 20:03:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:38,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:03:38,925 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:03:38,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323579396] [2021-12-18 20:03:38,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323579396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:03:38,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:03:38,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:03:38,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765028498] [2021-12-18 20:03:38,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:03:38,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:03:38,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:03:38,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:03:38,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:03:38,928 INFO L87 Difference]: Start difference. First operand 28 states and 31 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) [2021-12-18 20:03:39,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:39,018 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-12-18 20:03:39,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:03:39,019 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 [2021-12-18 20:03:39,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:39,020 INFO L225 Difference]: With dead ends: 57 [2021-12-18 20:03:39,020 INFO L226 Difference]: Without dead ends: 57 [2021-12-18 20:03:39,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:03:39,021 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 32 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:39,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 102 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:03:39,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-18 20:03:39,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 31. [2021-12-18 20:03:39,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:39,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-18 20:03:39,025 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 6 [2021-12-18 20:03:39,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:39,025 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-18 20:03:39,025 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) [2021-12-18 20:03:39,025 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-18 20:03:39,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 20:03:39,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:39,025 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 20:03:39,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:39,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:03:39,227 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:03:39,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:39,228 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-12-18 20:03:39,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:03:39,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355216652] [2021-12-18 20:03:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:39,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:03:39,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:03:39,230 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) [2021-12-18 20:03:39,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-18 20:03:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:39,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 20:03:39,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:39,293 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 8 treesize of output 7 [2021-12-18 20:03:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:39,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:03:39,333 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:03:39,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355216652] [2021-12-18 20:03:39,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355216652] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:03:39,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:03:39,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:03:39,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201572634] [2021-12-18 20:03:39,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:03:39,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:03:39,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:03:39,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:03:39,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:03:39,335 INFO L87 Difference]: Start difference. First operand 31 states and 34 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) [2021-12-18 20:03:39,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:39,360 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-12-18 20:03:39,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 20:03:39,360 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 [2021-12-18 20:03:39,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:39,362 INFO L225 Difference]: With dead ends: 33 [2021-12-18 20:03:39,362 INFO L226 Difference]: Without dead ends: 33 [2021-12-18 20:03:39,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:03:39,364 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:39,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 67 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-12-18 20:03:39,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-18 20:03:39,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-12-18 20:03:39,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:39,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-12-18 20:03:39,371 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-12-18 20:03:39,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:39,371 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-12-18 20:03:39,371 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) [2021-12-18 20:03:39,371 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-12-18 20:03:39,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 20:03:39,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:39,372 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:39,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:39,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:03:39,584 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:03:39,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:39,585 INFO L85 PathProgramCache]: Analyzing trace with hash 176742583, now seen corresponding path program 1 times [2021-12-18 20:03:39,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:03:39,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21532597] [2021-12-18 20:03:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:39,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:03:39,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:03:39,587 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) [2021-12-18 20:03:39,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-18 20:03:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:39,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 20:03:39,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:39,633 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 [2021-12-18 20:03:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:39,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:03:39,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:03:39,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21532597] [2021-12-18 20:03:39,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21532597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:03:39,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:03:39,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:03:39,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527346849] [2021-12-18 20:03:39,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:03:39,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 20:03:39,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:03:39,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 20:03:39,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:03:39,659 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:39,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:39,723 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-12-18 20:03:39,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 20:03:39,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-18 20:03:39,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:39,724 INFO L225 Difference]: With dead ends: 32 [2021-12-18 20:03:39,724 INFO L226 Difference]: Without dead ends: 32 [2021-12-18 20:03:39,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:03:39,724 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:39,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 35 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:03:39,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-18 20:03:39,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-12-18 20:03:39,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-18 20:03:39,727 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2021-12-18 20:03:39,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:39,727 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-18 20:03:39,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-18 20:03:39,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 20:03:39,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:39,727 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:39,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:39,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:03:39,934 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:03:39,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:39,934 INFO L85 PathProgramCache]: Analyzing trace with hash 176742584, now seen corresponding path program 1 times [2021-12-18 20:03:39,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:03:39,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146543187] [2021-12-18 20:03:39,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:39,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:03:39,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:03:39,936 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) [2021-12-18 20:03:39,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-18 20:03:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:39,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 20:03:39,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:40,001 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 8 treesize of output 7 [2021-12-18 20:03:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:40,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:03:40,108 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:03:40,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146543187] [2021-12-18 20:03:40,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146543187] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:03:40,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:03:40,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 20:03:40,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664241797] [2021-12-18 20:03:40,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:03:40,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:03:40,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:03:40,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:03:40,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:03:40,110 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:40,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:40,129 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-12-18 20:03:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 20:03:40,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-18 20:03:40,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:40,130 INFO L225 Difference]: With dead ends: 32 [2021-12-18 20:03:40,130 INFO L226 Difference]: Without dead ends: 32 [2021-12-18 20:03:40,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:03:40,131 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:40,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 79 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2021-12-18 20:03:40,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-18 20:03:40,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-18 20:03:40,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:40,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-12-18 20:03:40,133 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 8 [2021-12-18 20:03:40,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:40,134 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-12-18 20:03:40,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:40,134 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-12-18 20:03:40,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 20:03:40,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:40,134 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:40,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:40,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:03:40,341 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:03:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:40,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-12-18 20:03:40,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:03:40,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754406868] [2021-12-18 20:03:40,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:40,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:03:40,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:03:40,343 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) [2021-12-18 20:03:40,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-18 20:03:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:40,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 20:03:40,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:40,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:40,463 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:03:40,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754406868] [2021-12-18 20:03:40,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754406868] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:40,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:03:40,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-18 20:03:40,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733140671] [2021-12-18 20:03:40,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:40,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 20:03:40,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:03:40,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 20:03:40,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-18 20:03:40,465 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:40,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:40,513 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-12-18 20:03:40,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:03:40,514 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-18 20:03:40,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:40,515 INFO L225 Difference]: With dead ends: 52 [2021-12-18 20:03:40,515 INFO L226 Difference]: Without dead ends: 52 [2021-12-18 20:03:40,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-18 20:03:40,515 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 76 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:40,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 133 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:03:40,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-18 20:03:40,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2021-12-18 20:03:40,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-12-18 20:03:40,518 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 10 [2021-12-18 20:03:40,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:40,518 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-12-18 20:03:40,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:40,519 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-12-18 20:03:40,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 20:03:40,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:40,519 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:40,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:40,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:03:40,726 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:03:40,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:40,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-12-18 20:03:40,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:03:40,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603485989] [2021-12-18 20:03:40,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:40,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:03:40,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:03:40,728 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) [2021-12-18 20:03:40,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-18 20:03:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:40,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 20:03:40,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:40,807 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 8 treesize of output 7 [2021-12-18 20:03:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:40,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:41,319 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:03:41,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603485989] [2021-12-18 20:03:41,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603485989] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:41,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:03:41,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-12-18 20:03:41,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51791599] [2021-12-18 20:03:41,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:41,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 20:03:41,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:03:41,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 20:03:41,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 20:03:41,320 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:41,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:41,586 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-12-18 20:03:41,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 20:03:41,589 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-18 20:03:41,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:41,590 INFO L225 Difference]: With dead ends: 57 [2021-12-18 20:03:41,590 INFO L226 Difference]: Without dead ends: 57 [2021-12-18 20:03:41,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:03:41,590 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:41,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 100 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 16 Unchecked, 0.2s Time] [2021-12-18 20:03:41,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-18 20:03:41,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2021-12-18 20:03:41,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-12-18 20:03:41,594 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 10 [2021-12-18 20:03:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:41,595 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-12-18 20:03:41,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:41,595 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-12-18 20:03:41,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 20:03:41,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:41,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:41,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:41,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:03:41,799 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:03:41,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:41,800 INFO L85 PathProgramCache]: Analyzing trace with hash -680998147, now seen corresponding path program 1 times [2021-12-18 20:03:41,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:03:41,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202456838] [2021-12-18 20:03:41,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:41,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:03:41,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:03:41,801 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) [2021-12-18 20:03:41,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-18 20:03:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:41,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 20:03:41,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:41,855 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 [2021-12-18 20:03:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:41,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:03:41,933 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:03:41,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202456838] [2021-12-18 20:03:41,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202456838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:03:41,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:03:41,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 20:03:41,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722650435] [2021-12-18 20:03:41,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:03:41,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:03:41,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:03:41,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:03:41,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:03:41,935 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:42,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:42,097 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2021-12-18 20:03:42,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 20:03:42,098 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-12-18 20:03:42,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:42,098 INFO L225 Difference]: With dead ends: 74 [2021-12-18 20:03:42,098 INFO L226 Difference]: Without dead ends: 74 [2021-12-18 20:03:42,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-18 20:03:42,099 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 97 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:42,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 99 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:03:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-18 20:03:42,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2021-12-18 20:03:42,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-12-18 20:03:42,102 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 12 [2021-12-18 20:03:42,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:42,102 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-12-18 20:03:42,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-12-18 20:03:42,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 20:03:42,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:42,103 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:42,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:42,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:03:42,308 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:03:42,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:42,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1074025157, now seen corresponding path program 1 times [2021-12-18 20:03:42,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:03:42,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872606130] [2021-12-18 20:03:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:42,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:03:42,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:03:42,309 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) [2021-12-18 20:03:42,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-18 20:03:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:42,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 20:03:42,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:42,376 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 8 treesize of output 7 [2021-12-18 20:03:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:42,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:43,096 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:03:43,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872606130] [2021-12-18 20:03:43,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872606130] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-18 20:03:43,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:03:43,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-12-18 20:03:43,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027834472] [2021-12-18 20:03:43,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:03:43,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:03:43,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:03:43,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:03:43,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:03:43,098 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:43,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:43,581 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-12-18 20:03:43,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 20:03:43,581 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-12-18 20:03:43,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:43,582 INFO L225 Difference]: With dead ends: 60 [2021-12-18 20:03:43,582 INFO L226 Difference]: Without dead ends: 60 [2021-12-18 20:03:43,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-18 20:03:43,583 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:43,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 53 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:03:43,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-18 20:03:43,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2021-12-18 20:03:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.236842105263158) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:43,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-18 20:03:43,585 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 12 [2021-12-18 20:03:43,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:43,585 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-18 20:03:43,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:43,585 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-18 20:03:43,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 20:03:43,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:43,585 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:43,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:43,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:03:43,790 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:03:43,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:43,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1604227594, now seen corresponding path program 1 times [2021-12-18 20:03:43,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:03:43,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055618891] [2021-12-18 20:03:43,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:43,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:03:43,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:03:43,792 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) [2021-12-18 20:03:43,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-18 20:03:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:43,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 20:03:43,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:43,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:03:43,862 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:03:43,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055618891] [2021-12-18 20:03:43,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055618891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:03:43,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:03:43,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:03:43,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6957522] [2021-12-18 20:03:43,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:03:43,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:03:43,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:03:43,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:03:43,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:03:43,864 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:43,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:43,892 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-12-18 20:03:43,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:03:43,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-18 20:03:43,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:43,893 INFO L225 Difference]: With dead ends: 64 [2021-12-18 20:03:43,893 INFO L226 Difference]: Without dead ends: 64 [2021-12-18 20:03:43,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:03:43,894 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:43,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 72 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:03:43,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-18 20:03:43,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 43. [2021-12-18 20:03:43,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.225) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-12-18 20:03:43,897 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 14 [2021-12-18 20:03:43,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:43,898 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-12-18 20:03:43,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:43,898 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-12-18 20:03:43,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 20:03:43,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:43,898 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:43,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:44,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:03:44,104 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:03:44,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:44,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1346062156, now seen corresponding path program 1 times [2021-12-18 20:03:44,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:03:44,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682025319] [2021-12-18 20:03:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:44,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:03:44,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:03:44,105 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) [2021-12-18 20:03:44,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-18 20:03:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:44,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 20:03:44,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:44,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:44,328 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:03:44,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682025319] [2021-12-18 20:03:44,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682025319] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:44,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:03:44,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-18 20:03:44,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079917556] [2021-12-18 20:03:44,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:44,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 20:03:44,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:03:44,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 20:03:44,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:03:44,329 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:44,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:44,466 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2021-12-18 20:03:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 20:03:44,467 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-18 20:03:44,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:44,467 INFO L225 Difference]: With dead ends: 66 [2021-12-18 20:03:44,467 INFO L226 Difference]: Without dead ends: 66 [2021-12-18 20:03:44,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-12-18 20:03:44,468 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 145 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:44,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 81 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:03:44,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-18 20:03:44,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 41. [2021-12-18 20:03:44,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:44,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-12-18 20:03:44,471 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 14 [2021-12-18 20:03:44,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:44,471 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-12-18 20:03:44,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:44,471 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-12-18 20:03:44,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 20:03:44,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:44,472 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:44,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:44,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:03:44,678 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:03:44,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:44,678 INFO L85 PathProgramCache]: Analyzing trace with hash 265956368, now seen corresponding path program 1 times [2021-12-18 20:03:44,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:03:44,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941803121] [2021-12-18 20:03:44,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:44,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:03:44,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:03:44,680 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) [2021-12-18 20:03:44,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-18 20:03:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:44,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 20:03:44,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:44,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:44,822 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:03:44,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941803121] [2021-12-18 20:03:44,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941803121] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:44,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:03:44,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-18 20:03:44,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762701523] [2021-12-18 20:03:44,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:44,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 20:03:44,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:03:44,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 20:03:44,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-18 20:03:44,823 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:44,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:44,859 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-12-18 20:03:44,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:03:44,860 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 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 16 [2021-12-18 20:03:44,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:44,860 INFO L225 Difference]: With dead ends: 55 [2021-12-18 20:03:44,860 INFO L226 Difference]: Without dead ends: 55 [2021-12-18 20:03:44,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 20:03:44,861 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:44,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 83 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:03:44,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-18 20:03:44,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2021-12-18 20:03:44,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-12-18 20:03:44,863 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 16 [2021-12-18 20:03:44,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:44,863 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-12-18 20:03:44,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:44,864 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-12-18 20:03:44,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 20:03:44,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:44,864 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:44,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:45,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:03:45,069 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:03:45,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:45,069 INFO L85 PathProgramCache]: Analyzing trace with hash -745160882, now seen corresponding path program 1 times [2021-12-18 20:03:45,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:03:45,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853097126] [2021-12-18 20:03:45,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:45,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:03:45,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:03:45,070 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) [2021-12-18 20:03:45,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-18 20:03:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:45,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 20:03:45,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:45,131 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 8 treesize of output 7 [2021-12-18 20:03:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:45,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:45,810 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:03:45,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853097126] [2021-12-18 20:03:45,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853097126] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:45,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:03:45,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-12-18 20:03:45,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130550149] [2021-12-18 20:03:45,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:45,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 20:03:45,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:03:45,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 20:03:45,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-18 20:03:45,811 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:46,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:46,429 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2021-12-18 20:03:46,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 20:03:46,432 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 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 16 [2021-12-18 20:03:46,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:46,432 INFO L225 Difference]: With dead ends: 82 [2021-12-18 20:03:46,432 INFO L226 Difference]: Without dead ends: 82 [2021-12-18 20:03:46,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-12-18 20:03:46,433 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:46,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 124 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 97 Invalid, 0 Unknown, 23 Unchecked, 0.3s Time] [2021-12-18 20:03:46,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-18 20:03:46,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 67. [2021-12-18 20:03:46,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 64 states have (on average 1.203125) internal successors, (77), 66 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-12-18 20:03:46,436 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 16 [2021-12-18 20:03:46,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:46,436 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-12-18 20:03:46,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:46,437 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-12-18 20:03:46,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 20:03:46,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:46,437 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:46,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:46,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:03:46,643 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:03:46,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:46,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2114005431, now seen corresponding path program 1 times [2021-12-18 20:03:46,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:03:46,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083648398] [2021-12-18 20:03:46,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:46,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:03:46,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:03:46,652 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) [2021-12-18 20:03:46,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-18 20:03:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:46,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 20:03:46,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:03:48,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:03:48,816 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:03:48,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083648398] [2021-12-18 20:03:48,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083648398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:03:48,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:03:48,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:03:48,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722817672] [2021-12-18 20:03:48,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:03:48,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 20:03:48,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:03:48,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 20:03:48,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-18 20:03:48,824 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:48,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:48,835 INFO L93 Difference]: Finished difference Result 92 states and 108 transitions. [2021-12-18 20:03:48,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 20:03:48,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-18 20:03:48,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:48,837 INFO L225 Difference]: With dead ends: 92 [2021-12-18 20:03:48,837 INFO L226 Difference]: Without dead ends: 87 [2021-12-18 20:03:48,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-18 20:03:48,837 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:48,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 47 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2021-12-18 20:03:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-18 20:03:48,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2021-12-18 20:03:48,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 81 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2021-12-18 20:03:48,840 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 18 [2021-12-18 20:03:48,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:48,840 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2021-12-18 20:03:48,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:48,840 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2021-12-18 20:03:48,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 20:03:48,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:48,841 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-12-18 20:03:48,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:49,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:03:49,041 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:03:49,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:49,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-12-18 20:03:49,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:03:49,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349961040] [2021-12-18 20:03:49,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:03:49,042 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:03:49,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:03:49,043 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) [2021-12-18 20:03:49,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-18 20:03:49,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:03:49,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:03:49,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 20:03:49,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:49,121 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 8 treesize of output 7 [2021-12-18 20:03:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:49,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:50,042 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:03:50,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349961040] [2021-12-18 20:03:50,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349961040] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:50,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:03:50,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-18 20:03:50,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431826150] [2021-12-18 20:03:50,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:50,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 20:03:50,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:03:50,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 20:03:50,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-18 20:03:50,043 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:51,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:51,563 INFO L93 Difference]: Finished difference Result 233 states and 278 transitions. [2021-12-18 20:03:51,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 20:03:51,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-18 20:03:51,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:51,565 INFO L225 Difference]: With dead ends: 233 [2021-12-18 20:03:51,565 INFO L226 Difference]: Without dead ends: 233 [2021-12-18 20:03:51,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-12-18 20:03:51,566 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 62 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:51,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 258 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 156 Invalid, 0 Unknown, 41 Unchecked, 0.5s Time] [2021-12-18 20:03:51,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-18 20:03:51,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 98. [2021-12-18 20:03:51,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 95 states have (on average 1.2210526315789474) internal successors, (116), 97 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:51,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2021-12-18 20:03:51,569 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 18 [2021-12-18 20:03:51,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:51,569 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2021-12-18 20:03:51,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:51,570 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2021-12-18 20:03:51,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-18 20:03:51,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:51,571 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:51,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:51,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:03:51,777 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:03:51,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:51,777 INFO L85 PathProgramCache]: Analyzing trace with hash 997947932, now seen corresponding path program 1 times [2021-12-18 20:03:51,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:03:51,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178627125] [2021-12-18 20:03:51,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:51,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:03:51,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:03:51,779 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) [2021-12-18 20:03:51,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-18 20:03:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:51,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 20:03:51,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:03:53,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:03:53,969 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:03:53,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178627125] [2021-12-18 20:03:53,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178627125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:03:53,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:03:53,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:03:53,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229246870] [2021-12-18 20:03:53,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:03:53,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 20:03:53,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:03:53,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 20:03:53,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-18 20:03:53,970 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:53,974 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2021-12-18 20:03:53,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 20:03:53,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 24 [2021-12-18 20:03:53,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:53,975 INFO L225 Difference]: With dead ends: 97 [2021-12-18 20:03:53,975 INFO L226 Difference]: Without dead ends: 76 [2021-12-18 20:03:53,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-18 20:03:53,976 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:53,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 36 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2021-12-18 20:03:53,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-18 20:03:53,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2021-12-18 20:03:53,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 62 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:53,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-12-18 20:03:53,978 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 24 [2021-12-18 20:03:53,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:53,978 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-12-18 20:03:53,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:53,978 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-12-18 20:03:53,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-18 20:03:53,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:53,978 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:53,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:54,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:03:54,186 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:03:54,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:54,186 INFO L85 PathProgramCache]: Analyzing trace with hash 861855476, now seen corresponding path program 2 times [2021-12-18 20:03:54,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:03:54,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617329508] [2021-12-18 20:03:54,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:03:54,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:03:54,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:03:54,188 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) [2021-12-18 20:03:54,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-18 20:03:54,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:03:54,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:03:54,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 20:03:54,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:54,270 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 8 treesize of output 7 [2021-12-18 20:03:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:54,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:56,253 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:03:56,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617329508] [2021-12-18 20:03:56,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617329508] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:56,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:03:56,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-12-18 20:03:56,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200627429] [2021-12-18 20:03:56,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:56,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 20:03:56,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:03:56,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 20:03:56,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-12-18 20:03:56,254 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:57,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:57,091 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2021-12-18 20:03:57,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 20:03:57,092 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 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 24 [2021-12-18 20:03:57,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:57,092 INFO L225 Difference]: With dead ends: 92 [2021-12-18 20:03:57,093 INFO L226 Difference]: Without dead ends: 89 [2021-12-18 20:03:57,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-12-18 20:03:57,093 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 54 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:57,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 120 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 18 Unchecked, 0.5s Time] [2021-12-18 20:03:57,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-18 20:03:57,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2021-12-18 20:03:57,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:57,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-12-18 20:03:57,095 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 24 [2021-12-18 20:03:57,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:57,096 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-12-18 20:03:57,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:57,096 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-12-18 20:03:57,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-18 20:03:57,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:57,096 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:57,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:57,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:03:57,297 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:03:57,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:57,297 INFO L85 PathProgramCache]: Analyzing trace with hash -437341689, now seen corresponding path program 1 times [2021-12-18 20:03:57,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:03:57,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123480492] [2021-12-18 20:03:57,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:57,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:03:57,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:03:57,299 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) [2021-12-18 20:03:57,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-18 20:03:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:57,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 20:03:57,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:57,371 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 8 treesize of output 7 [2021-12-18 20:03:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:03:57,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:03:59,483 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:03:59,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123480492] [2021-12-18 20:03:59,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123480492] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:59,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:03:59,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-12-18 20:03:59,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943453893] [2021-12-18 20:03:59,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:59,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 20:03:59,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:03:59,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 20:03:59,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-12-18 20:03:59,484 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:00,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:00,334 INFO L93 Difference]: Finished difference Result 110 states and 126 transitions. [2021-12-18 20:04:00,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 20:04:00,336 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-18 20:04:00,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:00,336 INFO L225 Difference]: With dead ends: 110 [2021-12-18 20:04:00,336 INFO L226 Difference]: Without dead ends: 97 [2021-12-18 20:04:00,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-12-18 20:04:00,337 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:00,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 162 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 139 Invalid, 0 Unknown, 41 Unchecked, 0.5s Time] [2021-12-18 20:04:00,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-18 20:04:00,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2021-12-18 20:04:00,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 78 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:00,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2021-12-18 20:04:00,339 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 30 [2021-12-18 20:04:00,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:00,339 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2021-12-18 20:04:00,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:00,339 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2021-12-18 20:04:00,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 20:04:00,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:00,340 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:00,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:00,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:04:00,540 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:04:00,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:00,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1191228026, now seen corresponding path program 3 times [2021-12-18 20:04:00,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:04:00,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1033430528] [2021-12-18 20:04:00,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:04:00,541 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:04:00,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:04:00,542 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) [2021-12-18 20:04:00,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-18 20:04:00,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 20:04:00,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:00,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 20:04:00,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:00,650 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 8 treesize of output 7 [2021-12-18 20:04:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:04:01,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:04:02,803 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:04:02,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1033430528] [2021-12-18 20:04:02,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1033430528] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:02,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:04:02,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-12-18 20:04:02,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619376793] [2021-12-18 20:04:02,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:02,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 20:04:02,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:04:02,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 20:04:02,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-12-18 20:04:02,804 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:07,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:07,570 INFO L93 Difference]: Finished difference Result 129 states and 147 transitions. [2021-12-18 20:04:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 20:04:07,571 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-18 20:04:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:07,571 INFO L225 Difference]: With dead ends: 129 [2021-12-18 20:04:07,571 INFO L226 Difference]: Without dead ends: 129 [2021-12-18 20:04:07,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 20:04:07,572 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 315 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:07,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 162 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 195 Invalid, 0 Unknown, 47 Unchecked, 1.8s Time] [2021-12-18 20:04:07,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-18 20:04:07,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2021-12-18 20:04:07,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.1612903225806452) internal successors, (108), 94 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2021-12-18 20:04:07,574 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 32 [2021-12-18 20:04:07,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:07,574 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2021-12-18 20:04:07,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:07,574 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2021-12-18 20:04:07,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-18 20:04:07,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:07,591 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-12-18 20:04:07,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:07,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:04:07,792 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:04:07,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:07,792 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-12-18 20:04:07,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:04:07,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973076928] [2021-12-18 20:04:07,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:04:07,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:04:07,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:04:07,794 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 20:04:07,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-18 20:04:07,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-18 20:04:07,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:07,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 20:04:07,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:07,924 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 8 treesize of output 7 [2021-12-18 20:04:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:08,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:11,339 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:04:11,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973076928] [2021-12-18 20:04:11,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973076928] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:11,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:04:11,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-12-18 20:04:11,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124778702] [2021-12-18 20:04:11,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:11,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 20:04:11,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:04:11,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 20:04:11,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-12-18 20:04:11,340 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:28,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:28,371 INFO L93 Difference]: Finished difference Result 847 states and 952 transitions. [2021-12-18 20:04:28,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-18 20:04:28,372 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-18 20:04:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:28,375 INFO L225 Difference]: With dead ends: 847 [2021-12-18 20:04:28,375 INFO L226 Difference]: Without dead ends: 847 [2021-12-18 20:04:28,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=657, Invalid=1505, Unknown=0, NotChecked=0, Total=2162 [2021-12-18 20:04:28,376 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 998 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:28,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [998 Valid, 557 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 696 Invalid, 0 Unknown, 65 Unchecked, 2.9s Time] [2021-12-18 20:04:28,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-12-18 20:04:28,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 127. [2021-12-18 20:04:28,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 125 states have (on average 1.184) internal successors, (148), 126 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:28,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 148 transitions. [2021-12-18 20:04:28,384 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 148 transitions. Word has length 34 [2021-12-18 20:04:28,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:28,385 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 148 transitions. [2021-12-18 20:04:28,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:28,385 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 148 transitions. [2021-12-18 20:04:28,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-18 20:04:28,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:28,385 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:28,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:28,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:04:28,595 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:04:28,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:28,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1920076995, now seen corresponding path program 4 times [2021-12-18 20:04:28,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:04:28,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604645382] [2021-12-18 20:04:28,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:04:28,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:04:28,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:04:28,597 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 20:04:28,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-18 20:04:28,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:04:28,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:28,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 20:04:28,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:28,695 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 8 treesize of output 7 [2021-12-18 20:04:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 54 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 20:04:29,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:32,774 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:04:32,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604645382] [2021-12-18 20:04:32,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604645382] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:32,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:04:32,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 29 [2021-12-18 20:04:32,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434581849] [2021-12-18 20:04:32,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:32,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 20:04:32,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:04:32,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 20:04:32,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-12-18 20:04:32,776 INFO L87 Difference]: Start difference. First operand 127 states and 148 transitions. Second operand has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:34,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:34,386 INFO L93 Difference]: Finished difference Result 185 states and 214 transitions. [2021-12-18 20:04:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 20:04:34,388 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 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 44 [2021-12-18 20:04:34,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:34,388 INFO L225 Difference]: With dead ends: 185 [2021-12-18 20:04:34,388 INFO L226 Difference]: Without dead ends: 182 [2021-12-18 20:04:34,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 20:04:34,389 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 74 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:34,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 289 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 208 Invalid, 0 Unknown, 31 Unchecked, 0.9s Time] [2021-12-18 20:04:34,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-18 20:04:34,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 163. [2021-12-18 20:04:34,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 161 states have (on average 1.1925465838509317) internal successors, (192), 162 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:34,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 192 transitions. [2021-12-18 20:04:34,393 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 192 transitions. Word has length 44 [2021-12-18 20:04:34,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:34,393 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 192 transitions. [2021-12-18 20:04:34,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:34,393 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 192 transitions. [2021-12-18 20:04:34,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-18 20:04:34,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:34,394 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:34,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:34,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:04:34,596 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:04:34,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:34,596 INFO L85 PathProgramCache]: Analyzing trace with hash 121819862, now seen corresponding path program 2 times [2021-12-18 20:04:34,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:04:34,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623661419] [2021-12-18 20:04:34,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:04:34,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:04:34,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:04:34,598 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 20:04:34,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-18 20:04:34,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:04:34,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:34,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 20:04:34,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:34,713 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 8 treesize of output 7 [2021-12-18 20:04:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 60 proven. 45 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 20:04:35,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:04:39,029 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:04:39,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623661419] [2021-12-18 20:04:39,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623661419] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:39,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:04:39,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 29 [2021-12-18 20:04:39,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462431436] [2021-12-18 20:04:39,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:39,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 20:04:39,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:04:39,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 20:04:39,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-12-18 20:04:39,031 INFO L87 Difference]: Start difference. First operand 163 states and 192 transitions. Second operand has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:41,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:41,239 INFO L93 Difference]: Finished difference Result 248 states and 289 transitions. [2021-12-18 20:04:41,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 20:04:41,240 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 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 50 [2021-12-18 20:04:41,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:41,241 INFO L225 Difference]: With dead ends: 248 [2021-12-18 20:04:41,241 INFO L226 Difference]: Without dead ends: 235 [2021-12-18 20:04:41,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 20:04:41,241 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:41,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 322 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 151 Invalid, 0 Unknown, 24 Unchecked, 0.7s Time] [2021-12-18 20:04:41,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-18 20:04:41,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2021-12-18 20:04:41,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 161 states have (on average 1.186335403726708) internal successors, (191), 162 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:41,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 191 transitions. [2021-12-18 20:04:41,244 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 191 transitions. Word has length 50 [2021-12-18 20:04:41,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:41,244 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 191 transitions. [2021-12-18 20:04:41,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:41,244 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 191 transitions. [2021-12-18 20:04:41,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-18 20:04:41,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:41,245 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:41,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:41,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:04:41,445 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:04:41,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:41,446 INFO L85 PathProgramCache]: Analyzing trace with hash 426224534, now seen corresponding path program 3 times [2021-12-18 20:04:41,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:04:41,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139877947] [2021-12-18 20:04:41,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:04:41,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:04:41,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:04:41,447 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 20:04:41,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-18 20:04:41,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-18 20:04:41,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:41,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 20:04:41,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:41,581 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 8 treesize of output 7 [2021-12-18 20:04:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 72 proven. 11 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-18 20:04:42,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-18 20:05:04,260 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:05:04,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139877947] [2021-12-18 20:05:04,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139877947] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:04,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:05:04,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 29 [2021-12-18 20:05:04,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103216868] [2021-12-18 20:05:04,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:04,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 20:05:04,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:05:04,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 20:05:04,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=692, Unknown=2, NotChecked=0, Total=812 [2021-12-18 20:05:04,263 INFO L87 Difference]: Start difference. First operand 163 states and 191 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:05:06,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:05:06,425 INFO L93 Difference]: Finished difference Result 282 states and 326 transitions. [2021-12-18 20:05:06,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 20:05:06,427 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 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 50 [2021-12-18 20:05:06,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:05:06,427 INFO L225 Difference]: With dead ends: 282 [2021-12-18 20:05:06,428 INFO L226 Difference]: Without dead ends: 270 [2021-12-18 20:05:06,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=173, Invalid=947, Unknown=2, NotChecked=0, Total=1122 [2021-12-18 20:05:06,428 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:05:06,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 262 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 167 Unchecked, 1.1s Time] [2021-12-18 20:05:06,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-18 20:05:06,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 258. [2021-12-18 20:05:06,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 256 states have (on average 1.1796875) internal successors, (302), 257 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:05:06,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 302 transitions. [2021-12-18 20:05:06,432 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 302 transitions. Word has length 50 [2021-12-18 20:05:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:05:06,432 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 302 transitions. [2021-12-18 20:05:06,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:05:06,432 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 302 transitions. [2021-12-18 20:05:06,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 20:05:06,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:05:06,433 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:05:06,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-18 20:05:06,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:05:06,637 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:05:06,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:05:06,637 INFO L85 PathProgramCache]: Analyzing trace with hash 284026969, now seen corresponding path program 5 times [2021-12-18 20:05:06,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:05:06,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404717773] [2021-12-18 20:05:06,638 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:05:06,638 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:05:06,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:05:06,638 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 20:05:06,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-18 20:05:06,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-18 20:05:06,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:05:06,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-18 20:05:06,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:05:06,833 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 8 treesize of output 7 [2021-12-18 20:05:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 8 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:05:08,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:05:16,092 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:05:16,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404717773] [2021-12-18 20:05:16,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404717773] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:16,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:05:16,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-12-18 20:05:16,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805994709] [2021-12-18 20:05:16,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:16,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-18 20:05:16,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:05:16,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-18 20:05:16,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2021-12-18 20:05:16,093 INFO L87 Difference]: Start difference. First operand 258 states and 302 transitions. Second operand has 34 states, 34 states have (on average 3.0) internal successors, (102), 34 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:05:36,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:05:36,964 INFO L93 Difference]: Finished difference Result 276 states and 314 transitions. [2021-12-18 20:05:36,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-18 20:05:36,966 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0) internal successors, (102), 34 states have internal predecessors, (102), 0 states have call successors, (0), 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 52 [2021-12-18 20:05:36,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:05:36,967 INFO L225 Difference]: With dead ends: 276 [2021-12-18 20:05:36,967 INFO L226 Difference]: Without dead ends: 196 [2021-12-18 20:05:36,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=846, Invalid=3314, Unknown=0, NotChecked=0, Total=4160 [2021-12-18 20:05:36,968 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 678 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:05:36,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 772 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2021-12-18 20:05:36,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-18 20:05:36,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 178. [2021-12-18 20:05:36,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 176 states have (on average 1.1761363636363635) internal successors, (207), 177 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:05:36,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 207 transitions. [2021-12-18 20:05:36,971 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 207 transitions. Word has length 52 [2021-12-18 20:05:36,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:05:36,971 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 207 transitions. [2021-12-18 20:05:36,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0) internal successors, (102), 34 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:05:36,971 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 207 transitions. [2021-12-18 20:05:36,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 20:05:36,971 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:05:36,972 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:05:36,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-18 20:05:37,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:05:37,172 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:05:37,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:05:37,173 INFO L85 PathProgramCache]: Analyzing trace with hash 598816076, now seen corresponding path program 6 times [2021-12-18 20:05:37,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:05:37,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826244385] [2021-12-18 20:05:37,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:05:37,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:05:37,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:05:37,174 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 20:05:37,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-18 20:05:37,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-18 20:05:37,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:05:37,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-18 20:05:37,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:05:37,459 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 8 treesize of output 7 [2021-12-18 20:05:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 26 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:05:39,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:50,131 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:05:50,131 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:05:50,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826244385] [2021-12-18 20:05:50,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826244385] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:50,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:05:50,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 39 [2021-12-18 20:05:50,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966495248] [2021-12-18 20:05:50,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:50,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-18 20:05:50,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:05:50,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-18 20:05:50,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 20:05:50,132 INFO L87 Difference]: Start difference. First operand 178 states and 207 transitions. Second operand has 39 states, 39 states have (on average 2.8205128205128207) internal successors, (110), 39 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:10,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:06:19,309 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:06:26,279 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:06:38,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:06:38,925 INFO L93 Difference]: Finished difference Result 519 states and 587 transitions. [2021-12-18 20:06:38,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-18 20:06:38,926 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.8205128205128207) internal successors, (110), 39 states have internal predecessors, (110), 0 states have call successors, (0), 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 56 [2021-12-18 20:06:38,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:06:38,927 INFO L225 Difference]: With dead ends: 519 [2021-12-18 20:06:38,927 INFO L226 Difference]: Without dead ends: 516 [2021-12-18 20:06:38,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 42.8s TimeCoverageRelationStatistics Valid=1604, Invalid=7516, Unknown=0, NotChecked=0, Total=9120 [2021-12-18 20:06:38,929 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 867 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 468 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:06:38,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 1092 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1111 Invalid, 0 Unknown, 468 Unchecked, 14.1s Time] [2021-12-18 20:06:38,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-12-18 20:06:38,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 246. [2021-12-18 20:06:38,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 244 states have (on average 1.1557377049180328) internal successors, (282), 245 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:38,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 282 transitions. [2021-12-18 20:06:38,933 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 282 transitions. Word has length 56 [2021-12-18 20:06:38,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:06:38,933 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 282 transitions. [2021-12-18 20:06:38,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.8205128205128207) internal successors, (110), 39 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:38,933 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 282 transitions. [2021-12-18 20:06:38,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-18 20:06:38,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:06:38,934 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:06:38,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-18 20:06:39,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:06:39,143 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:06:39,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:06:39,144 INFO L85 PathProgramCache]: Analyzing trace with hash 854749724, now seen corresponding path program 4 times [2021-12-18 20:06:39,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:06:39,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997264937] [2021-12-18 20:06:39,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:06:39,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:06:39,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:06:39,145 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 20:06:39,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-18 20:06:39,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:06:39,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:06:39,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-18 20:06:39,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:06:39,307 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 8 treesize of output 7 [2021-12-18 20:06:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 28 proven. 111 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:06:41,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:06:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:06:50,028 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:06:50,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997264937] [2021-12-18 20:06:50,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997264937] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:06:50,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:06:50,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 37 [2021-12-18 20:06:50,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942045114] [2021-12-18 20:06:50,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:06:50,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-18 20:06:50,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:06:50,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-18 20:06:50,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 20:06:50,030 INFO L87 Difference]: Start difference. First operand 246 states and 282 transitions. Second operand has 37 states, 37 states have (on average 3.027027027027027) internal successors, (112), 37 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:59,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:06:59,494 INFO L93 Difference]: Finished difference Result 444 states and 509 transitions. [2021-12-18 20:06:59,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-18 20:06:59,497 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.027027027027027) internal successors, (112), 37 states have internal predecessors, (112), 0 states have call successors, (0), 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 58 [2021-12-18 20:06:59,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:06:59,498 INFO L225 Difference]: With dead ends: 444 [2021-12-18 20:06:59,498 INFO L226 Difference]: Without dead ends: 438 [2021-12-18 20:06:59,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=422, Invalid=2334, Unknown=0, NotChecked=0, Total=2756 [2021-12-18 20:06:59,499 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 205 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:06:59,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 387 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 416 Invalid, 0 Unknown, 47 Unchecked, 3.5s Time] [2021-12-18 20:06:59,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-12-18 20:06:59,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 270. [2021-12-18 20:06:59,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 268 states have (on average 1.1567164179104477) internal successors, (310), 269 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:59,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 310 transitions. [2021-12-18 20:06:59,503 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 310 transitions. Word has length 58 [2021-12-18 20:06:59,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:06:59,504 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 310 transitions. [2021-12-18 20:06:59,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.027027027027027) internal successors, (112), 37 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:59,504 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 310 transitions. [2021-12-18 20:06:59,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-18 20:06:59,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:06:59,505 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:06:59,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-18 20:06:59,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:06:59,712 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:06:59,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:06:59,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1473046111, now seen corresponding path program 5 times [2021-12-18 20:06:59,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:06:59,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465921971] [2021-12-18 20:06:59,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:06:59,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:06:59,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:06:59,714 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 20:06:59,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-18 20:06:59,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-18 20:06:59,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:06:59,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-18 20:06:59,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:06:59,926 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 8 treesize of output 7 [2021-12-18 20:07:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:07:02,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:07:14,976 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:07:14,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465921971] [2021-12-18 20:07:14,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465921971] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:14,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:07:14,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 42 [2021-12-18 20:07:14,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472453495] [2021-12-18 20:07:14,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:14,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-18 20:07:14,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:07:14,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-18 20:07:14,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1481, Unknown=0, NotChecked=0, Total=1722 [2021-12-18 20:07:14,978 INFO L87 Difference]: Start difference. First operand 270 states and 310 transitions. Second operand has 42 states, 42 states have (on average 2.857142857142857) internal successors, (120), 42 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:24,970 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:07:32,244 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:08:17,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:17,041 INFO L93 Difference]: Finished difference Result 660 states and 746 transitions. [2021-12-18 20:08:17,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-18 20:08:17,043 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.857142857142857) internal successors, (120), 42 states have internal predecessors, (120), 0 states have call successors, (0), 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 62 [2021-12-18 20:08:17,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:17,044 INFO L225 Difference]: With dead ends: 660 [2021-12-18 20:08:17,044 INFO L226 Difference]: Without dead ends: 634 [2021-12-18 20:08:17,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2461 ImplicationChecksByTransitivity, 52.4s TimeCoverageRelationStatistics Valid=1639, Invalid=8461, Unknown=0, NotChecked=0, Total=10100 [2021-12-18 20:08:17,046 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 1067 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 364 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:17,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1067 Valid, 945 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1284 Invalid, 0 Unknown, 364 Unchecked, 19.3s Time] [2021-12-18 20:08:17,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-12-18 20:08:17,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 248. [2021-12-18 20:08:17,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 246 states have (on average 1.1544715447154472) internal successors, (284), 247 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:08:17,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 284 transitions. [2021-12-18 20:08:17,051 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 284 transitions. Word has length 62 [2021-12-18 20:08:17,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:17,051 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 284 transitions. [2021-12-18 20:08:17,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.857142857142857) internal successors, (120), 42 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:08:17,051 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 284 transitions. [2021-12-18 20:08:17,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-18 20:08:17,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:17,052 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:17,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-18 20:08:17,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:08:17,263 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:08:17,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:17,264 INFO L85 PathProgramCache]: Analyzing trace with hash -709250913, now seen corresponding path program 6 times [2021-12-18 20:08:17,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:08:17,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210065134] [2021-12-18 20:08:17,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:08:17,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:08:17,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:08:17,265 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 20:08:17,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-18 20:08:17,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-18 20:08:17,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:08:17,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 20:08:17,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:17,497 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 8 treesize of output 7 [2021-12-18 20:08:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:08:19,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:08:29,269 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:08:29,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210065134] [2021-12-18 20:08:29,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210065134] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:29,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:08:29,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 39 [2021-12-18 20:08:29,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822965790] [2021-12-18 20:08:29,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:29,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-18 20:08:29,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:08:29,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-18 20:08:29,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1263, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 20:08:29,270 INFO L87 Difference]: Start difference. First operand 248 states and 284 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:09,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:09:09,223 INFO L93 Difference]: Finished difference Result 767 states and 861 transitions. [2021-12-18 20:09:09,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-18 20:09:09,225 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 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 62 [2021-12-18 20:09:09,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:09:09,227 INFO L225 Difference]: With dead ends: 767 [2021-12-18 20:09:09,227 INFO L226 Difference]: Without dead ends: 748 [2021-12-18 20:09:09,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=1161, Invalid=6321, Unknown=0, NotChecked=0, Total=7482 [2021-12-18 20:09:09,229 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 526 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 708 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:09:09,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 1329 Invalid, 2359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1561 Invalid, 0 Unknown, 708 Unchecked, 12.6s Time] [2021-12-18 20:09:09,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-12-18 20:09:09,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 258. [2021-12-18 20:09:09,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 256 states have (on average 1.15234375) internal successors, (295), 257 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:09,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 295 transitions. [2021-12-18 20:09:09,238 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 295 transitions. Word has length 62 [2021-12-18 20:09:09,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:09:09,239 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 295 transitions. [2021-12-18 20:09:09,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 295 transitions. [2021-12-18 20:09:09,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-18 20:09:09,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:09:09,240 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:09:09,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-12-18 20:09:09,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:09:09,448 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:09:09,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:09:09,448 INFO L85 PathProgramCache]: Analyzing trace with hash -404846241, now seen corresponding path program 7 times [2021-12-18 20:09:09,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:09:09,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785368742] [2021-12-18 20:09:09,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:09:09,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:09:09,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:09:09,449 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 20:09:09,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-18 20:09:09,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:09,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 20:09:09,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:09:09,612 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 8 treesize of output 7 [2021-12-18 20:09:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:09:12,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:09:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:09:22,073 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:09:22,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785368742] [2021-12-18 20:09:22,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785368742] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:09:22,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:09:22,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 39 [2021-12-18 20:09:22,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985975767] [2021-12-18 20:09:22,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:09:22,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-18 20:09:22,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:09:22,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-18 20:09:22,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 20:09:22,074 INFO L87 Difference]: Start difference. First operand 258 states and 295 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:24,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:10:24,595 INFO L93 Difference]: Finished difference Result 708 states and 793 transitions. [2021-12-18 20:10:24,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-18 20:10:24,597 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 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 62 [2021-12-18 20:10:24,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:10:24,598 INFO L225 Difference]: With dead ends: 708 [2021-12-18 20:10:24,598 INFO L226 Difference]: Without dead ends: 696 [2021-12-18 20:10:24,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3759 ImplicationChecksByTransitivity, 53.4s TimeCoverageRelationStatistics Valid=1766, Invalid=11806, Unknown=0, NotChecked=0, Total=13572 [2021-12-18 20:10:24,600 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 1249 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 1831 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 2435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2021-12-18 20:10:24,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1249 Valid, 1305 Invalid, 2435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1831 Invalid, 0 Unknown, 342 Unchecked, 16.9s Time] [2021-12-18 20:10:24,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-12-18 20:10:24,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 350. [2021-12-18 20:10:24,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 348 states have (on average 1.1522988505747127) internal successors, (401), 349 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:24,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 401 transitions. [2021-12-18 20:10:24,605 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 401 transitions. Word has length 62 [2021-12-18 20:10:24,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:10:24,605 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 401 transitions. [2021-12-18 20:10:24,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:24,606 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 401 transitions. [2021-12-18 20:10:24,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-18 20:10:24,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:10:24,606 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:10:24,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-12-18 20:10:24,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:10:24,814 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:10:24,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:10:24,815 INFO L85 PathProgramCache]: Analyzing trace with hash 573796562, now seen corresponding path program 7 times [2021-12-18 20:10:24,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:10:24,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1676598334] [2021-12-18 20:10:24,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:10:24,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:10:24,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:10:24,816 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 20:10:24,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-18 20:10:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:10:24,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-18 20:10:24,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:10:24,980 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 8 treesize of output 7 [2021-12-18 20:10:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:10:27,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:10:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 27 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:10:37,092 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:10:37,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1676598334] [2021-12-18 20:10:37,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1676598334] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:10:37,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:10:37,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2021-12-18 20:10:37,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325492895] [2021-12-18 20:10:37,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:10:37,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-18 20:10:37,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:10:37,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-18 20:10:37,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-12-18 20:10:37,093 INFO L87 Difference]: Start difference. First operand 350 states and 401 transitions. Second operand has 42 states, 41 states have (on average 3.073170731707317) internal successors, (126), 42 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:12:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:12:01,918 INFO L93 Difference]: Finished difference Result 725 states and 813 transitions. [2021-12-18 20:12:01,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-18 20:12:01,920 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.073170731707317) internal successors, (126), 42 states have internal predecessors, (126), 0 states have call successors, (0), 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 64 [2021-12-18 20:12:01,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:12:01,922 INFO L225 Difference]: With dead ends: 725 [2021-12-18 20:12:01,922 INFO L226 Difference]: Without dead ends: 725 [2021-12-18 20:12:01,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 81.7s TimeCoverageRelationStatistics Valid=2551, Invalid=11729, Unknown=0, NotChecked=0, Total=14280 [2021-12-18 20:12:01,923 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 2348 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 1824 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2348 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:12:01,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2348 Valid, 1144 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1824 Invalid, 0 Unknown, 174 Unchecked, 10.4s Time] [2021-12-18 20:12:01,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-12-18 20:12:01,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 262. [2021-12-18 20:12:01,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 260 states have (on average 1.1538461538461537) internal successors, (300), 261 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:12:01,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 300 transitions. [2021-12-18 20:12:01,927 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 300 transitions. Word has length 64 [2021-12-18 20:12:01,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:12:01,927 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 300 transitions. [2021-12-18 20:12:01,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.073170731707317) internal successors, (126), 42 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:12:01,927 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 300 transitions. [2021-12-18 20:12:01,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 20:12:01,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:12:01,928 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2021-12-18 20:12:01,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-12-18 20:12:02,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:12:02,128 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:12:02,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:12:02,129 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2021-12-18 20:12:02,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:12:02,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462171120] [2021-12-18 20:12:02,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:12:02,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:12:02,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:12:02,130 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 20:12:02,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-18 20:12:02,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:12:02,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:12:02,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 20:12:02,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:12:02,274 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 8 treesize of output 7 [2021-12-18 20:12:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:12:05,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:12:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:12:17,375 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:12:17,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462171120] [2021-12-18 20:12:17,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462171120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:12:17,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:12:17,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2021-12-18 20:12:17,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852502055] [2021-12-18 20:12:17,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:12:17,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-18 20:12:17,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:12:17,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-18 20:12:17,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=1524, Unknown=0, NotChecked=0, Total=2070 [2021-12-18 20:12:17,376 INFO L87 Difference]: Start difference. First operand 262 states and 300 transitions. Second operand has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:12:31,662 WARN L227 SmtUtils]: Spent 8.24s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:12:33,800 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:12:35,802 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:12:38,333 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:12:47,151 WARN L227 SmtUtils]: Spent 8.22s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:13:02,497 WARN L227 SmtUtils]: Spent 14.60s on a formula simplification. DAG size of input: 163 DAG size of output: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:13:04,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:13:06,933 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:13:09,859 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:13:16,731 WARN L227 SmtUtils]: Spent 6.32s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:13:31,701 WARN L227 SmtUtils]: Spent 14.19s on a formula simplification. DAG size of input: 152 DAG size of output: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:13:34,139 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:13:36,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:13:38,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:13:56,317 WARN L227 SmtUtils]: Spent 11.73s on a formula simplification. DAG size of input: 141 DAG size of output: 141 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:13:58,622 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:14:00,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:14:02,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:14:17,814 WARN L227 SmtUtils]: Spent 9.27s on a formula simplification. DAG size of input: 131 DAG size of output: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:14:20,042 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:14:22,045 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:14:24,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:14:36,855 WARN L227 SmtUtils]: Spent 7.77s on a formula simplification. DAG size of input: 120 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:14:39,104 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:14:41,108 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:14:43,111 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:14:54,385 WARN L227 SmtUtils]: Spent 6.44s on a formula simplification. DAG size of input: 109 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:14:56,503 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:14:58,508 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:15:00,561 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:15:10,791 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:15:12,793 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:15:21,975 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:15:23,978 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:15:31,257 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:15:33,320 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:15:39,960 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:15:41,994 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:15:47,527 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:15:52,378 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 20:15:57,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:15:57,373 INFO L93 Difference]: Finished difference Result 3397 states and 3822 transitions. [2021-12-18 20:15:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-18 20:15:57,375 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 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 66 [2021-12-18 20:15:57,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:15:57,381 INFO L225 Difference]: With dead ends: 3397 [2021-12-18 20:15:57,381 INFO L226 Difference]: Without dead ends: 3397 [2021-12-18 20:15:57,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2371 ImplicationChecksByTransitivity, 152.3s TimeCoverageRelationStatistics Valid=2173, Invalid=5137, Unknown=0, NotChecked=0, Total=7310 [2021-12-18 20:15:57,382 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 3594 mSDsluCounter, 1916 mSDsCounter, 0 mSdLazyCounter, 2609 mSolverCounterSat, 158 mSolverCounterUnsat, 30 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3594 SdHoareTripleChecker+Valid, 2007 SdHoareTripleChecker+Invalid, 2950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2609 IncrementalHoareTripleChecker+Invalid, 30 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 76.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:15:57,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3594 Valid, 2007 Invalid, 2950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2609 Invalid, 30 Unknown, 153 Unchecked, 76.3s Time] [2021-12-18 20:15:57,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3397 states. [2021-12-18 20:15:57,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3397 to 326. [2021-12-18 20:15:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 324 states have (on average 1.1728395061728396) internal successors, (380), 325 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:15:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 380 transitions. [2021-12-18 20:15:57,392 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 380 transitions. Word has length 66 [2021-12-18 20:15:57,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:15:57,393 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 380 transitions. [2021-12-18 20:15:57,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:15:57,393 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 380 transitions. [2021-12-18 20:15:57,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 20:15:57,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:15:57,394 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:15:57,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-12-18 20:15:57,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:15:57,602 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:15:57,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:15:57,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1221987074, now seen corresponding path program 8 times [2021-12-18 20:15:57,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:15:57,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842166848] [2021-12-18 20:15:57,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:15:57,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:15:57,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:15:57,604 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 20:15:57,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-18 20:15:57,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:15:57,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:15:57,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 20:15:57,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:15:57,777 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 8 treesize of output 7 [2021-12-18 20:16:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 36 proven. 171 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:16:00,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:16:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:16:11,086 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:16:11,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842166848] [2021-12-18 20:16:11,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842166848] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:16:11,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:16:11,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 39 [2021-12-18 20:16:11,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703694432] [2021-12-18 20:16:11,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:16:11,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-18 20:16:11,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:16:11,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-18 20:16:11,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 20:16:11,087 INFO L87 Difference]: Start difference. First operand 326 states and 380 transitions. Second operand has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 39 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:16:18,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:16:18,598 INFO L93 Difference]: Finished difference Result 535 states and 620 transitions. [2021-12-18 20:16:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-18 20:16:18,601 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 39 states have internal predecessors, (128), 0 states have call successors, (0), 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 66 [2021-12-18 20:16:18,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:16:18,602 INFO L225 Difference]: With dead ends: 535 [2021-12-18 20:16:18,602 INFO L226 Difference]: Without dead ends: 522 [2021-12-18 20:16:18,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2021-12-18 20:16:18,604 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 143 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:16:18,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 491 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 410 Invalid, 0 Unknown, 28 Unchecked, 3.3s Time] [2021-12-18 20:16:18,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-12-18 20:16:18,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 367. [2021-12-18 20:16:18,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 365 states have (on average 1.178082191780822) internal successors, (430), 366 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:16:18,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 430 transitions. [2021-12-18 20:16:18,609 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 430 transitions. Word has length 66 [2021-12-18 20:16:18,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:16:18,609 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 430 transitions. [2021-12-18 20:16:18,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 39 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:16:18,610 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 430 transitions. [2021-12-18 20:16:18,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 20:16:18,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:16:18,611 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:16:18,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-12-18 20:16:18,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:16:18,819 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:16:18,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:16:18,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1450877822, now seen corresponding path program 9 times [2021-12-18 20:16:18,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:16:18,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556495706] [2021-12-18 20:16:18,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:16:18,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:16:18,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:16:18,821 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 20:16:18,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-18 20:16:19,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-18 20:16:19,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:16:19,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 20:16:19,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:16:19,154 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 8 treesize of output 7 [2021-12-18 20:16:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 118 proven. 55 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-18 20:16:22,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:17:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 173 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-18 20:17:08,531 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:17:08,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556495706] [2021-12-18 20:17:08,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556495706] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:17:08,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:17:08,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 37 [2021-12-18 20:17:08,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903519563] [2021-12-18 20:17:08,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:17:08,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-18 20:17:08,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:17:08,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-18 20:17:08,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1158, Unknown=4, NotChecked=0, Total=1332 [2021-12-18 20:17:08,532 INFO L87 Difference]: Start difference. First operand 367 states and 430 transitions. Second operand has 37 states, 37 states have (on average 2.810810810810811) internal successors, (104), 37 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:17:12,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:17:12,449 INFO L93 Difference]: Finished difference Result 585 states and 683 transitions. [2021-12-18 20:17:12,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 20:17:12,451 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.810810810810811) internal successors, (104), 37 states have internal predecessors, (104), 0 states have call successors, (0), 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 66 [2021-12-18 20:17:12,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:17:12,452 INFO L225 Difference]: With dead ends: 585 [2021-12-18 20:17:12,452 INFO L226 Difference]: Without dead ends: 573 [2021-12-18 20:17:12,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 32.8s TimeCoverageRelationStatistics Valid=326, Invalid=1926, Unknown=4, NotChecked=0, Total=2256 [2021-12-18 20:17:12,453 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:17:12,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 351 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 138 Invalid, 0 Unknown, 108 Unchecked, 0.6s Time] [2021-12-18 20:17:12,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-12-18 20:17:12,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 544. [2021-12-18 20:17:12,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 542 states have (on average 1.1845018450184501) internal successors, (642), 543 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:17:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 642 transitions. [2021-12-18 20:17:12,458 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 642 transitions. Word has length 66 [2021-12-18 20:17:12,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:17:12,458 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 642 transitions. [2021-12-18 20:17:12,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.810810810810811) internal successors, (104), 37 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:17:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 642 transitions. [2021-12-18 20:17:12,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-18 20:17:12,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:17:12,459 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:17:12,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-12-18 20:17:12,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 20:17:12,672 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:17:12,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:17:12,672 INFO L85 PathProgramCache]: Analyzing trace with hash -163200120, now seen corresponding path program 8 times [2021-12-18 20:17:12,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 20:17:12,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300409019] [2021-12-18 20:17:12,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:17:12,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 20:17:12,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 20:17:12,674 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 20:17:12,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-18 20:17:12,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:17:12,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:17:12,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-18 20:17:12,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:17:12,858 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 8 treesize of output 7 [2021-12-18 20:17:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 68 proven. 194 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:17:16,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:17:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:17:30,158 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 20:17:30,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300409019] [2021-12-18 20:17:30,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300409019] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:17:30,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:17:30,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 44 [2021-12-18 20:17:30,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230535248] [2021-12-18 20:17:30,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:17:30,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-18 20:17:30,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 20:17:30,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-18 20:17:30,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1664, Unknown=0, NotChecked=0, Total=1892 [2021-12-18 20:17:30,160 INFO L87 Difference]: Start difference. First operand 544 states and 642 transitions. Second operand has 44 states, 44 states have (on average 3.159090909090909) internal successors, (139), 44 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Killed by 15