./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/test-0019_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b 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/list-ext-properties/test-0019_1-1.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 e7870b42a63b59b364c5190e807226b403761bdc30acb17e66a1329fa0ed9e16 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:40:07,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:40:07,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:40:08,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:40:08,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:40:08,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:40:08,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:40:08,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:40:08,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:40:08,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:40:08,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:40:08,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:40:08,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:40:08,031 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:40:08,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:40:08,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:40:08,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:40:08,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:40:08,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:40:08,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:40:08,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:40:08,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:40:08,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:40:08,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:40:08,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:40:08,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:40:08,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:40:08,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:40:08,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:40:08,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:40:08,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:40:08,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:40:08,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:40:08,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:40:08,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:40:08,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:40:08,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:40:08,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:40:08,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:40:08,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:40:08,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:40:08,069 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-14 19:40:08,096 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:40:08,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:40:08,097 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:40:08,097 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:40:08,098 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:40:08,098 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:40:08,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:40:08,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:40:08,099 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:40:08,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:40:08,101 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:40:08,101 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:40:08,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:40:08,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:40:08,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:40:08,102 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:40:08,102 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:40:08,102 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:40:08,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:40:08,102 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:40:08,103 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:40:08,103 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:40:08,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:40:08,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:40:08,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:40:08,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:40:08,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:40:08,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:40:08,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 19:40:08,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 19:40:08,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:40:08,105 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7870b42a63b59b364c5190e807226b403761bdc30acb17e66a1329fa0ed9e16 [2021-12-14 19:40:08,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:40:08,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:40:08,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:40:08,384 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:40:08,385 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:40:08,386 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0019_1-1.i [2021-12-14 19:40:08,443 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ee21c1f0/d8016ad870684d5998db9d526a40337d/FLAGcaebec181 [2021-12-14 19:40:08,916 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:40:08,916 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0019_1-1.i [2021-12-14 19:40:08,939 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ee21c1f0/d8016ad870684d5998db9d526a40337d/FLAGcaebec181 [2021-12-14 19:40:09,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ee21c1f0/d8016ad870684d5998db9d526a40337d [2021-12-14 19:40:09,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:40:09,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:40:09,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:40:09,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:40:09,465 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:40:09,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:40:09" (1/1) ... [2021-12-14 19:40:09,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41d5d9df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:09, skipping insertion in model container [2021-12-14 19:40:09,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:40:09" (1/1) ... [2021-12-14 19:40:09,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:40:09,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:40:09,822 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:40:09,832 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) [2021-12-14 19:40:09,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2da18e90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:09, skipping insertion in model container [2021-12-14 19:40:09,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:40:09,834 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-14 19:40:09,836 INFO L158 Benchmark]: Toolchain (without parser) took 383.64ms. Allocated memory is still 92.3MB. Free memory was 60.7MB in the beginning and 66.5MB in the end (delta: -5.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-14 19:40:09,837 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 92.3MB. Free memory is still 49.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 19:40:09,838 INFO L158 Benchmark]: CACSL2BoogieTranslator took 379.52ms. Allocated memory is still 92.3MB. Free memory was 60.5MB in the beginning and 66.5MB in the end (delta: -6.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-14 19:40:09,841 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 92.3MB. Free memory is still 49.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 379.52ms. Allocated memory is still 92.3MB. Free memory was 60.5MB in the beginning and 66.5MB in the end (delta: -6.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 529]: 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/list-ext-properties/test-0019_1-1.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 e7870b42a63b59b364c5190e807226b403761bdc30acb17e66a1329fa0ed9e16 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:40:11,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:40:11,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:40:11,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:40:11,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:40:11,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:40:11,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:40:11,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:40:11,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:40:11,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:40:11,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:40:11,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:40:11,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:40:11,665 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:40:11,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:40:11,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:40:11,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:40:11,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:40:11,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:40:11,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:40:11,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:40:11,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:40:11,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:40:11,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:40:11,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:40:11,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:40:11,679 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:40:11,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:40:11,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:40:11,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:40:11,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:40:11,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:40:11,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:40:11,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:40:11,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:40:11,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:40:11,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:40:11,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:40:11,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:40:11,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:40:11,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:40:11,687 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-14 19:40:11,707 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:40:11,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:40:11,708 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:40:11,708 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:40:11,709 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:40:11,709 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:40:11,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:40:11,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:40:11,710 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:40:11,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:40:11,711 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:40:11,711 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:40:11,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:40:11,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:40:11,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:40:11,712 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:40:11,712 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:40:11,712 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:40:11,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:40:11,713 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:40:11,713 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-14 19:40:11,713 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-14 19:40:11,714 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:40:11,714 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:40:11,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:40:11,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:40:11,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:40:11,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:40:11,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:40:11,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:40:11,716 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-14 19:40:11,716 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-14 19:40:11,716 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:40:11,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-14 19:40:11,717 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7870b42a63b59b364c5190e807226b403761bdc30acb17e66a1329fa0ed9e16 [2021-12-14 19:40:12,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:40:12,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:40:12,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:40:12,037 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:40:12,038 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:40:12,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0019_1-1.i [2021-12-14 19:40:12,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a548aacc2/d9fef7b19a064f539c35d2d3f909e98d/FLAG1c22727e5 [2021-12-14 19:40:12,591 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:40:12,591 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0019_1-1.i [2021-12-14 19:40:12,611 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a548aacc2/d9fef7b19a064f539c35d2d3f909e98d/FLAG1c22727e5 [2021-12-14 19:40:12,938 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a548aacc2/d9fef7b19a064f539c35d2d3f909e98d [2021-12-14 19:40:12,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:40:12,941 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:40:12,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:40:12,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:40:12,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:40:12,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:40:12" (1/1) ... [2021-12-14 19:40:12,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b59f0cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:12, skipping insertion in model container [2021-12-14 19:40:12,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:40:12" (1/1) ... [2021-12-14 19:40:12,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:40:13,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:40:13,332 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:40:13,349 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-14 19:40:13,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:40:13,389 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:40:13,400 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 19:40:13,426 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:40:13,452 INFO L208 MainTranslator]: Completed translation [2021-12-14 19:40:13,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:13 WrapperNode [2021-12-14 19:40:13,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:40:13,454 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 19:40:13,454 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 19:40:13,454 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 19:40:13,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:13" (1/1) ... [2021-12-14 19:40:13,476 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:13" (1/1) ... [2021-12-14 19:40:13,507 INFO L137 Inliner]: procedures = 128, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2021-12-14 19:40:13,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 19:40:13,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 19:40:13,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 19:40:13,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 19:40:13,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:13" (1/1) ... [2021-12-14 19:40:13,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:13" (1/1) ... [2021-12-14 19:40:13,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:13" (1/1) ... [2021-12-14 19:40:13,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:13" (1/1) ... [2021-12-14 19:40:13,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:13" (1/1) ... [2021-12-14 19:40:13,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:13" (1/1) ... [2021-12-14 19:40:13,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:13" (1/1) ... [2021-12-14 19:40:13,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 19:40:13,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 19:40:13,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 19:40:13,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 19:40:13,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:13" (1/1) ... [2021-12-14 19:40:13,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:40:13,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:40:13,590 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) [2021-12-14 19:40:13,610 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 [2021-12-14 19:40:13,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-14 19:40:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 19:40:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 19:40:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 19:40:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 19:40:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 19:40:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 19:40:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-14 19:40:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-14 19:40:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 19:40:13,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 19:40:13,755 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 19:40:13,756 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 19:40:14,046 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 19:40:14,052 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 19:40:14,052 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 19:40:14,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:40:14 BoogieIcfgContainer [2021-12-14 19:40:14,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 19:40:14,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 19:40:14,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 19:40:14,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 19:40:14,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:40:12" (1/3) ... [2021-12-14 19:40:14,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f08525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:40:14, skipping insertion in model container [2021-12-14 19:40:14,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:13" (2/3) ... [2021-12-14 19:40:14,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f08525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:40:14, skipping insertion in model container [2021-12-14 19:40:14,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:40:14" (3/3) ... [2021-12-14 19:40:14,062 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0019_1-1.i [2021-12-14 19:40:14,067 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 19:40:14,067 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2021-12-14 19:40:14,105 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 19:40:14,111 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 [2021-12-14 19:40:14,112 INFO L340 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2021-12-14 19:40:14,124 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 31 states have (on average 2.032258064516129) internal successors, (63), 62 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:14,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-14 19:40:14,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:14,131 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-14 19:40:14,131 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-14 19:40:14,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:14,136 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-14 19:40:14,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:40:14,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606592965] [2021-12-14 19:40:14,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:14,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:40:14,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:40:14,151 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) [2021-12-14 19:40:14,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-14 19:40:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:14,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 19:40:14,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:14,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:40:14,403 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-14 19:40:14,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-12-14 19:40:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:14,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:40:14,426 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:40:14,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606592965] [2021-12-14 19:40:14,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606592965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:14,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:14,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:40:14,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344317957] [2021-12-14 19:40:14,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:14,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:40:14,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:40:14,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:40:14,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:40:14,465 INFO L87 Difference]: Start difference. First operand has 63 states, 31 states have (on average 2.032258064516129) internal successors, (63), 62 states have internal predecessors, (63), 0 states have call successors, (0), 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 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:14,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:14,599 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-12-14 19:40:14,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:40:14,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-14 19:40:14,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:14,608 INFO L225 Difference]: With dead ends: 66 [2021-12-14 19:40:14,608 INFO L226 Difference]: Without dead ends: 64 [2021-12-14 19:40:14,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:40:14,612 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:14,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 38 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:40:14,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-14 19:40:14,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2021-12-14 19:40:14,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 30 states have (on average 1.9) internal successors, (57), 56 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) [2021-12-14 19:40:14,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-12-14 19:40:14,642 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 3 [2021-12-14 19:40:14,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:14,642 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-12-14 19:40:14,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:14,643 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-12-14 19:40:14,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-14 19:40:14,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:14,643 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-14 19:40:14,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:14,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:40:14,857 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-14 19:40:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:14,858 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-14 19:40:14,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:40:14,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682229024] [2021-12-14 19:40:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:14,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:40:14,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:40:14,860 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) [2021-12-14 19:40:14,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-14 19:40:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:14,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 19:40:14,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:14,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:40:14,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-14 19:40:14,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-14 19:40:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:15,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:40:15,033 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:40:15,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682229024] [2021-12-14 19:40:15,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682229024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:15,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:15,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:40:15,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746216016] [2021-12-14 19:40:15,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:15,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:40:15,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:40:15,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:40:15,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:40:15,038 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:15,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:15,136 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-12-14 19:40:15,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:40:15,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-14 19:40:15,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:15,138 INFO L225 Difference]: With dead ends: 56 [2021-12-14 19:40:15,138 INFO L226 Difference]: Without dead ends: 56 [2021-12-14 19:40:15,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:40:15,139 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:15,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 84 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:40:15,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-14 19:40:15,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-12-14 19:40:15,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 55 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) [2021-12-14 19:40:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-12-14 19:40:15,149 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 3 [2021-12-14 19:40:15,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:15,149 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-12-14 19:40:15,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:15,150 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-12-14 19:40:15,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-14 19:40:15,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:15,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-14 19:40:15,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:15,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:40:15,351 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-14 19:40:15,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:15,352 INFO L85 PathProgramCache]: Analyzing trace with hash 28691811, now seen corresponding path program 1 times [2021-12-14 19:40:15,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:40:15,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103996532] [2021-12-14 19:40:15,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:15,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:40:15,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:40:15,354 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) [2021-12-14 19:40:15,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-14 19:40:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:15,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 19:40:15,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:15,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:40:15,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-14 19:40:15,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-14 19:40:15,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:40:15,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-14 19:40:15,604 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:40:15,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-14 19:40:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:15,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:40:15,611 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:40:15,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103996532] [2021-12-14 19:40:15,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103996532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:15,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:15,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:40:15,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711888646] [2021-12-14 19:40:15,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:15,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:40:15,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:40:15,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:40:15,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:40:15,614 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:15,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:15,739 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-12-14 19:40:15,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:40:15,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-12-14 19:40:15,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:15,740 INFO L225 Difference]: With dead ends: 60 [2021-12-14 19:40:15,740 INFO L226 Difference]: Without dead ends: 60 [2021-12-14 19:40:15,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:40:15,742 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 95 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:15,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 25 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:40:15,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-14 19:40:15,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-12-14 19:40:15,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 52 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:15,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-12-14 19:40:15,747 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 5 [2021-12-14 19:40:15,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:15,747 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-12-14 19:40:15,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:15,748 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-12-14 19:40:15,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 19:40:15,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:15,748 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:15,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:15,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:40:15,957 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-14 19:40:15,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:15,958 INFO L85 PathProgramCache]: Analyzing trace with hash 59199982, now seen corresponding path program 1 times [2021-12-14 19:40:15,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:40:15,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207746513] [2021-12-14 19:40:15,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:15,959 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:40:15,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:40:15,960 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) [2021-12-14 19:40:15,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-14 19:40:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:16,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 19:40:16,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:16,076 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-14 19:40:16,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-12-14 19:40:16,098 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:40:16,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:40:16,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:40:16,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:40:16,228 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-14 19:40:16,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-14 19:40:16,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-14 19:40:16,290 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-14 19:40:16,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-14 19:40:16,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:40:16,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-14 19:40:16,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-14 19:40:16,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 19:40:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:16,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:40:16,341 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:40:16,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207746513] [2021-12-14 19:40:16,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207746513] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:16,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:16,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:40:16,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77156222] [2021-12-14 19:40:16,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:16,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:40:16,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:40:16,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:40:16,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:40:16,347 INFO L87 Difference]: Start difference. First operand 53 states and 53 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) [2021-12-14 19:40:16,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:16,603 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-12-14 19:40:16,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:40:16,604 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 [2021-12-14 19:40:16,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:16,605 INFO L225 Difference]: With dead ends: 52 [2021-12-14 19:40:16,605 INFO L226 Difference]: Without dead ends: 52 [2021-12-14 19:40:16,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:40:16,606 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 5 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:16,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 133 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:40:16,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-14 19:40:16,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-14 19:40:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 51 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:16,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-12-14 19:40:16,610 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 8 [2021-12-14 19:40:16,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:16,611 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-12-14 19:40:16,611 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) [2021-12-14 19:40:16,611 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-12-14 19:40:16,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 19:40:16,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:16,612 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:16,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:16,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:40:16,813 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-14 19:40:16,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:16,813 INFO L85 PathProgramCache]: Analyzing trace with hash 59199981, now seen corresponding path program 1 times [2021-12-14 19:40:16,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:40:16,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778232041] [2021-12-14 19:40:16,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:16,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:40:16,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:40:16,815 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) [2021-12-14 19:40:16,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-14 19:40:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:16,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 19:40:16,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:16,914 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-14 19:40:16,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-12-14 19:40:16,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:40:16,982 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-14 19:40:16,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 38 [2021-12-14 19:40:17,032 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-14 19:40:17,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-12-14 19:40:17,077 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-14 19:40:17,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 21 [2021-12-14 19:40:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:17,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:40:17,090 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:40:17,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778232041] [2021-12-14 19:40:17,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778232041] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:17,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:17,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 19:40:17,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68799514] [2021-12-14 19:40:17,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:17,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 19:40:17,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:40:17,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 19:40:17,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:40:17,093 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 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) [2021-12-14 19:40:17,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:17,370 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-12-14 19:40:17,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:40:17,370 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 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 [2021-12-14 19:40:17,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:17,371 INFO L225 Difference]: With dead ends: 51 [2021-12-14 19:40:17,371 INFO L226 Difference]: Without dead ends: 51 [2021-12-14 19:40:17,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:40:17,372 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 3 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:17,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 157 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:40:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-14 19:40:17,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-14 19:40:17,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.7) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:17,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-12-14 19:40:17,376 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 8 [2021-12-14 19:40:17,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:17,376 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-12-14 19:40:17,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 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) [2021-12-14 19:40:17,376 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-12-14 19:40:17,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 19:40:17,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:17,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:17,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:17,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:40:17,577 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-14 19:40:17,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:17,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1604937559, now seen corresponding path program 1 times [2021-12-14 19:40:17,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:40:17,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689629509] [2021-12-14 19:40:17,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:17,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:40:17,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:40:17,580 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) [2021-12-14 19:40:17,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-14 19:40:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:17,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-14 19:40:17,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:17,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-14 19:40:17,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:40:17,756 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 [2021-12-14 19:40:17,794 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-14 19:40:17,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-12-14 19:40:17,881 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:40:17,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2021-12-14 19:40:17,910 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-14 19:40:17,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2021-12-14 19:40:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:17,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:40:17,923 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:40:17,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689629509] [2021-12-14 19:40:17,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689629509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:17,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:17,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 19:40:17,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072979083] [2021-12-14 19:40:17,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:17,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 19:40:17,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:40:17,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 19:40:17,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:40:17,924 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:18,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:18,143 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-12-14 19:40:18,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:40:18,144 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-12-14 19:40:18,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:18,145 INFO L225 Difference]: With dead ends: 50 [2021-12-14 19:40:18,145 INFO L226 Difference]: Without dead ends: 50 [2021-12-14 19:40:18,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:40:18,146 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:18,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 182 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:40:18,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-14 19:40:18,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-14 19:40:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 49 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-12-14 19:40:18,151 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 11 [2021-12-14 19:40:18,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:18,153 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-12-14 19:40:18,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:18,153 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-12-14 19:40:18,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 19:40:18,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:18,154 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:18,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-14 19:40:18,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:40:18,360 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-14 19:40:18,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:18,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1604937558, now seen corresponding path program 1 times [2021-12-14 19:40:18,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:40:18,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1493884425] [2021-12-14 19:40:18,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:18,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:40:18,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:40:18,362 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) [2021-12-14 19:40:18,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-14 19:40:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:18,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-14 19:40:18,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:18,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-14 19:40:18,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:40:18,521 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 [2021-12-14 19:40:18,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 19:40:18,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:40:18,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-14 19:40:18,693 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:40:18,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2021-12-14 19:40:18,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-14 19:40:18,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-14 19:40:18,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 19:40:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:18,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:40:18,758 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:40:18,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1493884425] [2021-12-14 19:40:18,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1493884425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:18,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:18,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 19:40:18,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863206291] [2021-12-14 19:40:18,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:18,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 19:40:18,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:40:18,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 19:40:18,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:40:18,760 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:19,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:19,000 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-12-14 19:40:19,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:40:19,004 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-12-14 19:40:19,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:19,004 INFO L225 Difference]: With dead ends: 49 [2021-12-14 19:40:19,005 INFO L226 Difference]: Without dead ends: 49 [2021-12-14 19:40:19,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:40:19,006 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:19,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 226 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:40:19,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-14 19:40:19,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-14 19:40:19,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 48 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) [2021-12-14 19:40:19,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-12-14 19:40:19,010 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 11 [2021-12-14 19:40:19,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:19,010 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-12-14 19:40:19,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:19,011 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-12-14 19:40:19,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-14 19:40:19,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:19,011 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:19,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:19,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:40:19,222 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-14 19:40:19,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:19,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1118886990, now seen corresponding path program 1 times [2021-12-14 19:40:19,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:40:19,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200183650] [2021-12-14 19:40:19,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:19,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:40:19,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:40:19,225 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) [2021-12-14 19:40:19,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-14 19:40:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:19,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 19:40:19,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:19,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:40:19,354 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:40:19,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200183650] [2021-12-14 19:40:19,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200183650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:19,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:19,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:40:19,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866883106] [2021-12-14 19:40:19,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:19,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:40:19,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:40:19,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:40:19,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:40:19,361 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2021-12-14 19:40:19,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:19,475 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-12-14 19:40:19,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:40:19,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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 [2021-12-14 19:40:19,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:19,477 INFO L225 Difference]: With dead ends: 51 [2021-12-14 19:40:19,477 INFO L226 Difference]: Without dead ends: 51 [2021-12-14 19:40:19,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:40:19,478 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 93 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:19,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 37 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:40:19,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-14 19:40:19,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2021-12-14 19:40:19,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-12-14 19:40:19,482 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 14 [2021-12-14 19:40:19,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:19,482 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-12-14 19:40:19,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2021-12-14 19:40:19,482 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-12-14 19:40:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-14 19:40:19,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:19,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:19,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-14 19:40:19,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:40:19,688 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-14 19:40:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:19,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1118886989, now seen corresponding path program 1 times [2021-12-14 19:40:19,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:40:19,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377808471] [2021-12-14 19:40:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:19,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:40:19,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:40:19,690 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) [2021-12-14 19:40:19,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-14 19:40:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:19,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 19:40:19,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:19,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:40:19,901 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:40:19,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377808471] [2021-12-14 19:40:19,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377808471] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:19,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:19,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:40:19,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910694111] [2021-12-14 19:40:19,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:19,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:40:19,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:40:19,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:40:19,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:40:19,902 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2021-12-14 19:40:20,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:20,005 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-12-14 19:40:20,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:40:20,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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 [2021-12-14 19:40:20,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:20,006 INFO L225 Difference]: With dead ends: 43 [2021-12-14 19:40:20,006 INFO L226 Difference]: Without dead ends: 43 [2021-12-14 19:40:20,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:40:20,007 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 93 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:20,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 30 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:40:20,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-14 19:40:20,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-14 19:40:20,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 42 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:20,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-12-14 19:40:20,010 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 14 [2021-12-14 19:40:20,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:20,010 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-12-14 19:40:20,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2021-12-14 19:40:20,010 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-12-14 19:40:20,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 19:40:20,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:20,011 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:20,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:20,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:40:20,220 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-14 19:40:20,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:20,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1959919348, now seen corresponding path program 1 times [2021-12-14 19:40:20,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:40:20,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1033640527] [2021-12-14 19:40:20,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:20,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:40:20,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:40:20,222 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) [2021-12-14 19:40:20,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-14 19:40:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:20,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-14 19:40:20,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:20,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-14 19:40:20,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:40:20,465 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:40:20,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-14 19:40:20,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:40:20,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-14 19:40:20,625 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:40:20,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2021-12-14 19:40:20,745 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:40:20,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2021-12-14 19:40:20,842 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-14 19:40:20,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 20 [2021-12-14 19:40:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:20,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:40:20,894 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:40:20,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1033640527] [2021-12-14 19:40:20,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1033640527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:20,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:20,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-14 19:40:20,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638267297] [2021-12-14 19:40:20,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:20,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 19:40:20,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:40:20,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 19:40:20,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:40:20,896 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 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) [2021-12-14 19:40:22,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:22,061 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-12-14 19:40:22,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 19:40:22,062 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 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 [2021-12-14 19:40:22,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:22,062 INFO L225 Difference]: With dead ends: 43 [2021-12-14 19:40:22,062 INFO L226 Difference]: Without dead ends: 43 [2021-12-14 19:40:22,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-12-14 19:40:22,063 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 91 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:22,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 126 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:40:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-14 19:40:22,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-12-14 19:40:22,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 40 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) [2021-12-14 19:40:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-12-14 19:40:22,066 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 18 [2021-12-14 19:40:22,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:22,066 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-12-14 19:40:22,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 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) [2021-12-14 19:40:22,067 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-12-14 19:40:22,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 19:40:22,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:22,067 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:22,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:22,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:40:22,278 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-14 19:40:22,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:22,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1959919349, now seen corresponding path program 1 times [2021-12-14 19:40:22,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:40:22,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340022293] [2021-12-14 19:40:22,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:22,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:40:22,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:40:22,280 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) [2021-12-14 19:40:22,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-14 19:40:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:22,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-14 19:40:22,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:22,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-14 19:40:22,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:40:22,522 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:40:22,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-14 19:40:22,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:40:22,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:40:22,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-14 19:40:22,695 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:40:22,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 51 [2021-12-14 19:40:22,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-12-14 19:40:22,906 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:40:22,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 55 [2021-12-14 19:40:22,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-12-14 19:40:23,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:40:23,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-12-14 19:40:23,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-12-14 19:40:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:23,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:40:23,308 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:40:23,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340022293] [2021-12-14 19:40:23,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340022293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:23,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:23,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-14 19:40:23,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954732901] [2021-12-14 19:40:23,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:23,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 19:40:23,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:40:23,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 19:40:23,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:40:23,310 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 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) [2021-12-14 19:40:25,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:25,619 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-12-14 19:40:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 19:40:25,620 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 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 [2021-12-14 19:40:25,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:25,621 INFO L225 Difference]: With dead ends: 40 [2021-12-14 19:40:25,621 INFO L226 Difference]: Without dead ends: 40 [2021-12-14 19:40:25,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-12-14 19:40:25,622 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 86 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:25,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 100 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 19:40:25,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-14 19:40:25,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-14 19:40:25,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 39 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:25,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-12-14 19:40:25,625 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 18 [2021-12-14 19:40:25,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:25,625 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-12-14 19:40:25,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 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) [2021-12-14 19:40:25,626 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-12-14 19:40:25,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 19:40:25,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:25,626 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:25,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:25,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:40:25,837 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-14 19:40:25,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:25,838 INFO L85 PathProgramCache]: Analyzing trace with hash 627957652, now seen corresponding path program 1 times [2021-12-14 19:40:25,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:40:25,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515474598] [2021-12-14 19:40:25,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:25,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:40:25,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:40:25,839 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) [2021-12-14 19:40:25,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-14 19:40:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:26,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-14 19:40:26,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:26,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-14 19:40:26,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:40:26,131 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-14 19:40:26,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-12-14 19:40:26,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:40:26,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-14 19:40:26,311 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:40:26,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 46 [2021-12-14 19:40:26,414 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:40:26,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 48 [2021-12-14 19:40:30,561 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-14 19:40:30,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-14 19:40:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:30,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:40:30,649 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:40:30,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515474598] [2021-12-14 19:40:30,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515474598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:30,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:30,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-14 19:40:30,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565213092] [2021-12-14 19:40:30,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:30,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 19:40:30,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:40:30,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 19:40:30,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=104, Unknown=2, NotChecked=0, Total=132 [2021-12-14 19:40:30,650 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:36,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:36,964 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-12-14 19:40:36,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 19:40:36,965 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-14 19:40:36,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:36,965 INFO L225 Difference]: With dead ends: 39 [2021-12-14 19:40:36,965 INFO L226 Difference]: Without dead ends: 39 [2021-12-14 19:40:36,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=81, Invalid=297, Unknown=2, NotChecked=0, Total=380 [2021-12-14 19:40:36,966 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 54 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:36,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 120 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 152 Invalid, 0 Unknown, 47 Unchecked, 0.8s Time] [2021-12-14 19:40:36,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-14 19:40:36,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-14 19:40:36,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 38 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:36,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-12-14 19:40:36,969 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 19 [2021-12-14 19:40:36,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:36,969 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-12-14 19:40:36,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:36,970 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-12-14 19:40:36,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 19:40:36,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:36,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:36,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:37,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:40:37,179 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-14 19:40:37,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:37,180 INFO L85 PathProgramCache]: Analyzing trace with hash 627957653, now seen corresponding path program 1 times [2021-12-14 19:40:37,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:40:37,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874020820] [2021-12-14 19:40:37,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:37,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:40:37,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:40:37,181 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) [2021-12-14 19:40:37,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-14 19:40:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:37,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-14 19:40:37,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:37,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-12-14 19:40:37,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:40:37,467 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:40:37,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-14 19:40:37,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:40:37,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:40:37,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-14 19:40:37,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 19:40:37,657 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:40:37,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2021-12-14 19:40:37,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-14 19:40:37,772 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:40:37,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 51 [2021-12-14 19:40:37,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-14 19:40:37,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 19:40:37,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:40:37,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-12-14 19:40:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:37,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:40:37,941 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:40:37,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874020820] [2021-12-14 19:40:37,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874020820] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:37,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:37,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-14 19:40:37,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817478725] [2021-12-14 19:40:37,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:37,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 19:40:37,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:40:37,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 19:40:37,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:40:37,943 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:38,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:38,610 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-12-14 19:40:38,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 19:40:38,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-14 19:40:38,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:38,611 INFO L225 Difference]: With dead ends: 37 [2021-12-14 19:40:38,611 INFO L226 Difference]: Without dead ends: 37 [2021-12-14 19:40:38,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-12-14 19:40:38,612 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 92 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:38,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 77 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:40:38,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-14 19:40:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-14 19:40:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 36 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) [2021-12-14 19:40:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-12-14 19:40:38,614 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 19 [2021-12-14 19:40:38,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:38,614 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-12-14 19:40:38,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-12-14 19:40:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 19:40:38,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:38,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:38,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:38,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:40:38,826 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-14 19:40:38,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:38,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2123084748, now seen corresponding path program 1 times [2021-12-14 19:40:38,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:40:38,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365014486] [2021-12-14 19:40:38,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:38,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:40:38,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:40:38,828 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) [2021-12-14 19:40:38,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-14 19:40:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:39,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-14 19:40:39,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:39,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-14 19:40:39,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:40:39,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:40:39,100 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:40:39,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-14 19:40:39,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:40:39,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-14 19:40:39,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:40:39,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-14 19:40:39,265 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:40:39,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-12-14 19:40:39,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-14 19:40:39,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:40:39,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-12-14 19:40:39,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-14 19:40:39,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 19:40:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:39,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:40:39,407 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:40:39,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365014486] [2021-12-14 19:40:39,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365014486] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:39,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:39,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-14 19:40:39,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783627092] [2021-12-14 19:40:39,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:39,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 19:40:39,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:40:39,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 19:40:39,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:40:39,409 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:40,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:40,021 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-12-14 19:40:40,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 19:40:40,021 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-14 19:40:40,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:40,022 INFO L225 Difference]: With dead ends: 36 [2021-12-14 19:40:40,022 INFO L226 Difference]: Without dead ends: 36 [2021-12-14 19:40:40,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-12-14 19:40:40,023 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 67 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:40,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 106 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:40:40,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-14 19:40:40,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-12-14 19:40:40,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 35 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) [2021-12-14 19:40:40,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-12-14 19:40:40,025 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 21 [2021-12-14 19:40:40,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:40,025 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-12-14 19:40:40,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:40,025 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-12-14 19:40:40,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-14 19:40:40,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:40,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:40,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:40,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:40:40,226 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-14 19:40:40,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:40,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1391117671, now seen corresponding path program 1 times [2021-12-14 19:40:40,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:40:40,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238059340] [2021-12-14 19:40:40,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:40,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:40:40,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:40:40,230 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) [2021-12-14 19:40:40,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-14 19:40:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:40,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-14 19:40:40,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:40,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-14 19:40:40,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:40:40,560 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:40:40,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-14 19:40:40,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:40:40,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-12-14 19:40:40,741 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:40:40,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-12-14 19:40:40,838 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:40:40,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-12-14 19:40:40,927 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-14 19:40:40,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 15 [2021-12-14 19:40:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:40,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:40:40,990 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:40:40,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238059340] [2021-12-14 19:40:40,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238059340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:40,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:40,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-14 19:40:40,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031341918] [2021-12-14 19:40:40,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:40,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 19:40:40,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:40:40,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 19:40:40,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:40:40,992 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:42,318 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-12-14 19:40:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 19:40:42,318 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-14 19:40:42,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:42,319 INFO L225 Difference]: With dead ends: 35 [2021-12-14 19:40:42,319 INFO L226 Difference]: Without dead ends: 35 [2021-12-14 19:40:42,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-12-14 19:40:42,320 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:42,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 79 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 19:40:42,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-14 19:40:42,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-14 19:40:42,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-12-14 19:40:42,322 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 22 [2021-12-14 19:40:42,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:42,323 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-12-14 19:40:42,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:42,323 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-12-14 19:40:42,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-14 19:40:42,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:42,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:42,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:42,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:40:42,527 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-14 19:40:42,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:42,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1115888917, now seen corresponding path program 1 times [2021-12-14 19:40:42,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:40:42,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156684060] [2021-12-14 19:40:42,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:42,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:40:42,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:40:42,529 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) [2021-12-14 19:40:42,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-14 19:40:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 19:40:42,774 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 19:40:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 19:40:42,949 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-12-14 19:40:42,950 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-14 19:40:42,950 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_LEAK (30 of 31 remaining) [2021-12-14 19:40:42,952 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (29 of 31 remaining) [2021-12-14 19:40:42,952 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (28 of 31 remaining) [2021-12-14 19:40:42,952 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (27 of 31 remaining) [2021-12-14 19:40:42,952 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (26 of 31 remaining) [2021-12-14 19:40:42,953 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (25 of 31 remaining) [2021-12-14 19:40:42,953 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (24 of 31 remaining) [2021-12-14 19:40:42,953 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (23 of 31 remaining) [2021-12-14 19:40:42,953 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (22 of 31 remaining) [2021-12-14 19:40:42,953 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (21 of 31 remaining) [2021-12-14 19:40:42,975 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (20 of 31 remaining) [2021-12-14 19:40:42,975 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (19 of 31 remaining) [2021-12-14 19:40:42,976 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (18 of 31 remaining) [2021-12-14 19:40:42,976 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION (17 of 31 remaining) [2021-12-14 19:40:42,976 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (16 of 31 remaining) [2021-12-14 19:40:42,976 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (15 of 31 remaining) [2021-12-14 19:40:42,976 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION (14 of 31 remaining) [2021-12-14 19:40:42,976 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION (13 of 31 remaining) [2021-12-14 19:40:42,977 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION (12 of 31 remaining) [2021-12-14 19:40:42,977 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION (11 of 31 remaining) [2021-12-14 19:40:42,977 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION (10 of 31 remaining) [2021-12-14 19:40:42,977 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE (9 of 31 remaining) [2021-12-14 19:40:42,977 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE (8 of 31 remaining) [2021-12-14 19:40:42,977 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE (7 of 31 remaining) [2021-12-14 19:40:42,978 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE (6 of 31 remaining) [2021-12-14 19:40:42,978 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE (5 of 31 remaining) [2021-12-14 19:40:42,978 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE (4 of 31 remaining) [2021-12-14 19:40:42,978 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION (3 of 31 remaining) [2021-12-14 19:40:42,978 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION (2 of 31 remaining) [2021-12-14 19:40:42,978 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION (1 of 31 remaining) [2021-12-14 19:40:42,979 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATION (0 of 31 remaining) [2021-12-14 19:40:43,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-14 19:40:43,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:40:43,181 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:43,184 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-14 19:40:43,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 07:40:43 BoogieIcfgContainer [2021-12-14 19:40:43,211 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-14 19:40:43,212 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 19:40:43,212 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 19:40:43,212 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 19:40:43,213 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:40:14" (3/4) ... [2021-12-14 19:40:43,215 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-14 19:40:43,215 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 19:40:43,216 INFO L158 Benchmark]: Toolchain (without parser) took 30274.89ms. Allocated memory was 58.7MB in the beginning and 88.1MB in the end (delta: 29.4MB). Free memory was 36.9MB in the beginning and 62.1MB in the end (delta: -25.2MB). Peak memory consumption was 3.8MB. Max. memory is 16.1GB. [2021-12-14 19:40:43,216 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 58.7MB. Free memory was 41.2MB in the beginning and 41.2MB in the end (delta: 81.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 19:40:43,216 INFO L158 Benchmark]: CACSL2BoogieTranslator took 511.48ms. Allocated memory is still 58.7MB. Free memory was 36.7MB in the beginning and 31.5MB in the end (delta: 5.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-14 19:40:43,216 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.79ms. Allocated memory is still 58.7MB. Free memory was 31.5MB in the beginning and 29.3MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 19:40:43,217 INFO L158 Benchmark]: Boogie Preprocessor took 39.44ms. Allocated memory is still 58.7MB. Free memory was 29.3MB in the beginning and 27.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 19:40:43,217 INFO L158 Benchmark]: RCFGBuilder took 506.03ms. Allocated memory was 58.7MB in the beginning and 73.4MB in the end (delta: 14.7MB). Free memory was 27.7MB in the beginning and 42.9MB in the end (delta: -15.1MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2021-12-14 19:40:43,217 INFO L158 Benchmark]: TraceAbstraction took 29155.51ms. Allocated memory was 73.4MB in the beginning and 88.1MB in the end (delta: 14.7MB). Free memory was 42.4MB in the beginning and 62.1MB in the end (delta: -19.8MB). Peak memory consumption was 37.2MB. Max. memory is 16.1GB. [2021-12-14 19:40:43,217 INFO L158 Benchmark]: Witness Printer took 3.51ms. Allocated memory is still 88.1MB. Free memory is still 62.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 19:40:43,219 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 58.7MB. Free memory was 41.2MB in the beginning and 41.2MB in the end (delta: 81.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 511.48ms. Allocated memory is still 58.7MB. Free memory was 36.7MB in the beginning and 31.5MB in the end (delta: 5.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.79ms. Allocated memory is still 58.7MB. Free memory was 31.5MB in the beginning and 29.3MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.44ms. Allocated memory is still 58.7MB. Free memory was 29.3MB in the beginning and 27.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 506.03ms. Allocated memory was 58.7MB in the beginning and 73.4MB in the end (delta: 14.7MB). Free memory was 27.7MB in the beginning and 42.9MB in the end (delta: -15.1MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. * TraceAbstraction took 29155.51ms. Allocated memory was 73.4MB in the beginning and 88.1MB in the end (delta: 14.7MB). Free memory was 42.4MB in the beginning and 62.1MB in the end (delta: -19.8MB). Peak memory consumption was 37.2MB. Max. memory is 16.1GB. * Witness Printer took 3.51ms. Allocated memory is still 88.1MB. Free memory is still 62.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 545]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 545. Possible FailurePath: [L546] TData data; [L547] CALL alloc_data(&data) [L529] pdata->lo = (int *)malloc(sizeof(int)) VAL [malloc(sizeof(int))={3:0}, pdata={10:0}, pdata={10:0}] [L530] pdata->hi = (int *)malloc(sizeof(int)) VAL [malloc(sizeof(int))={8:0}, pdata={10:0}, pdata={10:0}] [L531] EXPR pdata->lo VAL [pdata={10:0}, pdata={10:0}, pdata->lo={3:0}] [L531] *(pdata->lo) = 4 VAL [pdata={10:0}, pdata={10:0}, pdata->lo={3:0}] [L532] EXPR pdata->hi VAL [pdata={10:0}, pdata={10:0}, pdata->hi={8:0}] [L532] *(pdata->hi) = 8 VAL [pdata={10:0}, pdata={10:0}, pdata->hi={8:0}] [L547] RET alloc_data(&data) [L548] CALL free_data(&data) [L536] EXPR data->lo VAL [data={10:0}, data={10:0}, data->lo={3:0}] [L536] int *lo = data->lo; [L537] EXPR data->hi VAL [data={10:0}, data={10:0}, data->hi={8:0}, lo={3:0}] [L537] int *hi = data->hi; [L538] EXPR \read(*lo) VAL [\read(*lo)=4, data={10:0}, data={10:0}, hi={8:0}, lo={3:0}] [L538] EXPR \read(*hi) VAL [\read(*hi)=8, \read(*lo)=4, data={10:0}, data={10:0}, hi={8:0}, lo={3:0}] [L538] COND FALSE !(*lo >= *hi) [L542] data->lo = ((void *)0) VAL [data={10:0}, data={10:0}, hi={8:0}, lo={3:0}] [L543] data->hi = ((void *)0) VAL [data={10:0}, data={10:0}, hi={8:0}, lo={3:0}] [L548] RET free_data(&data) [L549] return 0; [L549] return 0; VAL [\result=0] - UnprovableResult [Line: 529]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 529]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 536]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 536]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 63 locations, 31 error locations. Started 1 CEGAR loops. OverallTime: 29.1s, OverallIterations: 16, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 14.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 820 SdHoareTripleChecker+Valid, 4.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 820 mSDsluCounter, 1520 SdHoareTripleChecker+Invalid, 3.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 47 IncrementalHoareTripleChecker+Unchecked, 1087 mSDsCounter, 148 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1664 IncrementalHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 148 mSolverCounterUnsat, 433 mSDtfsCounter, 1664 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 258 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 15.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=0, InterpolantAutomatonStates: 145, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 20 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 9.3s InterpolantComputationTime, 218 NumberOfCodeBlocks, 218 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 179 ConstructedInterpolants, 3 QuantifiedInterpolants, 3777 SizeOfPredicates, 156 NumberOfNonLiveVariables, 1658 ConjunctsInSsa, 305 ConjunctsInUnsatCore, 15 InterpolantComputations, 15 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-14 19:40:43,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample