./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test23_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test23_3.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 b04cfdc033f25419ae30b8c067b1e8de34cd963e91f12bceeafd05a3d125e0b7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:38:07,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:38:07,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:38:07,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:38:07,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:38:07,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:38:07,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:38:07,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:38:07,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:38:07,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:38:07,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:38:07,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:38:07,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:38:07,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:38:07,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:38:07,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:38:07,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:38:07,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:38:07,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:38:07,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:38:07,768 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:38:07,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:38:07,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:38:07,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:38:07,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:38:07,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:38:07,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:38:07,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:38:07,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:38:07,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:38:07,778 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:38:07,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:38:07,780 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:38:07,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:38:07,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:38:07,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:38:07,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:38:07,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:38:07,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:38:07,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:38:07,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:38:07,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:38:07,785 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:38:07,807 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:38:07,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:38:07,807 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:38:07,808 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:38:07,808 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:38:07,808 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:38:07,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:38:07,809 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:38:07,809 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:38:07,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:38:07,810 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:38:07,810 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:38:07,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:38:07,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:38:07,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:38:07,811 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:38:07,811 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:38:07,811 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:38:07,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:38:07,812 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:38:07,812 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:38:07,812 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:38:07,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:38:07,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:38:07,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:38:07,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:38:07,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:38:07,813 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:38:07,813 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:38:07,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:38:07,814 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b04cfdc033f25419ae30b8c067b1e8de34cd963e91f12bceeafd05a3d125e0b7 [2022-07-14 06:38:08,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:38:08,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:38:08,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:38:08,045 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:38:08,045 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:38:08,046 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test23_3.i [2022-07-14 06:38:08,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47d981cca/81ba9abb05244ad0bce8086576667d08/FLAG442d27022 [2022-07-14 06:38:08,559 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:38:08,561 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test23_3.i [2022-07-14 06:38:08,575 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47d981cca/81ba9abb05244ad0bce8086576667d08/FLAG442d27022 [2022-07-14 06:38:08,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47d981cca/81ba9abb05244ad0bce8086576667d08 [2022-07-14 06:38:08,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:38:08,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:38:08,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:38:08,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:38:08,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:38:08,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:38:08" (1/1) ... [2022-07-14 06:38:08,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ea1dcf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:38:08, skipping insertion in model container [2022-07-14 06:38:08,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:38:08" (1/1) ... [2022-07-14 06:38:08,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:38:08,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:38:08,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:38:08,951 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-14 06:38:08,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1d21dffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:38:08, skipping insertion in model container [2022-07-14 06:38:08,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:38:08,952 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-14 06:38:08,954 INFO L158 Benchmark]: Toolchain (without parser) took 362.20ms. Allocated memory was 96.5MB in the beginning and 121.6MB in the end (delta: 25.2MB). Free memory was 57.0MB in the beginning and 95.7MB in the end (delta: -38.6MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. [2022-07-14 06:38:08,955 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 96.5MB. Free memory is still 75.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:38:08,955 INFO L158 Benchmark]: CACSL2BoogieTranslator took 359.44ms. Allocated memory was 96.5MB in the beginning and 121.6MB in the end (delta: 25.2MB). Free memory was 56.8MB in the beginning and 95.7MB in the end (delta: -38.9MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. [2022-07-14 06:38:08,957 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 96.5MB. Free memory is still 75.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 359.44ms. Allocated memory was 96.5MB in the beginning and 121.6MB in the end (delta: 25.2MB). Free memory was 56.8MB in the beginning and 95.7MB in the end (delta: -38.9MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test23_3.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 b04cfdc033f25419ae30b8c067b1e8de34cd963e91f12bceeafd05a3d125e0b7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:38:10,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:38:10,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:38:10,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:38:10,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:38:10,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:38:10,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:38:10,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:38:10,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:38:10,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:38:10,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:38:10,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:38:10,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:38:10,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:38:10,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:38:10,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:38:10,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:38:10,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:38:10,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:38:10,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:38:10,446 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:38:10,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:38:10,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:38:10,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:38:10,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:38:10,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:38:10,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:38:10,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:38:10,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:38:10,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:38:10,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:38:10,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:38:10,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:38:10,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:38:10,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:38:10,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:38:10,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:38:10,462 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:38:10,462 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:38:10,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:38:10,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:38:10,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:38:10,466 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-14 06:38:10,484 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:38:10,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:38:10,485 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:38:10,485 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:38:10,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:38:10,486 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:38:10,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:38:10,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:38:10,486 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:38:10,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:38:10,487 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:38:10,487 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:38:10,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:38:10,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:38:10,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:38:10,488 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:38:10,488 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:38:10,488 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:38:10,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:38:10,488 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:38:10,489 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-14 06:38:10,489 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-14 06:38:10,489 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:38:10,489 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:38:10,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:38:10,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:38:10,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:38:10,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:38:10,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:38:10,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:38:10,490 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-14 06:38:10,490 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-14 06:38:10,490 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-14 06:38:10,491 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b04cfdc033f25419ae30b8c067b1e8de34cd963e91f12bceeafd05a3d125e0b7 [2022-07-14 06:38:10,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:38:10,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:38:10,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:38:10,784 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:38:10,784 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:38:10,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test23_3.i [2022-07-14 06:38:10,834 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ecf5beec/ca7ec4acbfae42cb8432991ec15a95aa/FLAG47770743c [2022-07-14 06:38:11,283 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:38:11,287 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test23_3.i [2022-07-14 06:38:11,300 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ecf5beec/ca7ec4acbfae42cb8432991ec15a95aa/FLAG47770743c [2022-07-14 06:38:11,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ecf5beec/ca7ec4acbfae42cb8432991ec15a95aa [2022-07-14 06:38:11,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:38:11,314 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:38:11,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:38:11,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:38:11,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:38:11,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:38:11" (1/1) ... [2022-07-14 06:38:11,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@552446af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:38:11, skipping insertion in model container [2022-07-14 06:38:11,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:38:11" (1/1) ... [2022-07-14 06:38:11,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:38:11,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:38:11,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:38:11,686 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-14 06:38:11,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:38:11,743 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:38:11,754 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:38:11,799 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:38:11,839 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:38:11,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:38:11 WrapperNode [2022-07-14 06:38:11,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:38:11,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:38:11,841 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:38:11,841 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:38:11,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:38:11" (1/1) ... [2022-07-14 06:38:11,883 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:38:11" (1/1) ... [2022-07-14 06:38:11,904 INFO L137 Inliner]: procedures = 174, calls = 117, calls flagged for inlining = 29, calls inlined = 14, statements flattened = 187 [2022-07-14 06:38:11,904 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:38:11,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:38:11,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:38:11,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:38:11,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:38:11" (1/1) ... [2022-07-14 06:38:11,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:38:11" (1/1) ... [2022-07-14 06:38:11,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:38:11" (1/1) ... [2022-07-14 06:38:11,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:38:11" (1/1) ... [2022-07-14 06:38:11,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:38:11" (1/1) ... [2022-07-14 06:38:11,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:38:11" (1/1) ... [2022-07-14 06:38:11,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:38:11" (1/1) ... [2022-07-14 06:38:11,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:38:11,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:38:11,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:38:11,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:38:11,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:38:11" (1/1) ... [2022-07-14 06:38:11,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:38:11,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:38:11,992 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-14 06:38:12,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-14 06:38:12,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-14 06:38:12,025 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2022-07-14 06:38:12,025 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2022-07-14 06:38:12,025 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2022-07-14 06:38:12,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2022-07-14 06:38:12,026 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-14 06:38:12,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-14 06:38:12,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 06:38:12,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 06:38:12,028 INFO L130 BoogieDeclarations]: Found specification of procedure free_reports [2022-07-14 06:38:12,028 INFO L138 BoogieDeclarations]: Found implementation of procedure free_reports [2022-07-14 06:38:12,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 06:38:12,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 06:38:12,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 06:38:12,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-14 06:38:12,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:38:12,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-14 06:38:12,029 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2022-07-14 06:38:12,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2022-07-14 06:38:12,029 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-07-14 06:38:12,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-07-14 06:38:12,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:38:12,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:38:12,188 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:38:12,189 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:38:12,654 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:38:12,660 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:38:12,660 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-14 06:38:12,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:38:12 BoogieIcfgContainer [2022-07-14 06:38:12,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:38:12,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:38:12,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:38:12,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:38:12,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:38:11" (1/3) ... [2022-07-14 06:38:12,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2db1b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:38:12, skipping insertion in model container [2022-07-14 06:38:12,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:38:11" (2/3) ... [2022-07-14 06:38:12,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2db1b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:38:12, skipping insertion in model container [2022-07-14 06:38:12,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:38:12" (3/3) ... [2022-07-14 06:38:12,669 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test23_3.i [2022-07-14 06:38:12,679 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:38:12,679 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 76 error locations. [2022-07-14 06:38:12,715 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:38:12,719 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@41605860, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@24dc2362 [2022-07-14 06:38:12,719 INFO L358 AbstractCegarLoop]: Starting to check reachability of 76 error locations. [2022-07-14 06:38:12,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 199 states, 108 states have (on average 1.8425925925925926) internal successors, (199), 184 states have internal predecessors, (199), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-14 06:38:12,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 06:38:12,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:12,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:12,730 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:12,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:12,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1617164409, now seen corresponding path program 1 times [2022-07-14 06:38:12,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:12,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978182180] [2022-07-14 06:38:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:12,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:12,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:12,750 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:12,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-14 06:38:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:12,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:38:12,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:12,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:38:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:12,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:12,979 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:12,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978182180] [2022-07-14 06:38:12,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978182180] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:12,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:12,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:38:12,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391785985] [2022-07-14 06:38:12,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:12,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:38:12,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:13,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:38:13,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:38:13,010 INFO L87 Difference]: Start difference. First operand has 199 states, 108 states have (on average 1.8425925925925926) internal successors, (199), 184 states have internal predecessors, (199), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:38:13,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:13,574 INFO L93 Difference]: Finished difference Result 226 states and 243 transitions. [2022-07-14 06:38:13,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:38:13,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-07-14 06:38:13,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:13,583 INFO L225 Difference]: With dead ends: 226 [2022-07-14 06:38:13,584 INFO L226 Difference]: Without dead ends: 222 [2022-07-14 06:38:13,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:38:13,591 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 28 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:13,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 825 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:38:13,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-07-14 06:38:13,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 206. [2022-07-14 06:38:13,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 114 states have (on average 1.7894736842105263) internal successors, (204), 189 states have internal predecessors, (204), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-14 06:38:13,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 223 transitions. [2022-07-14 06:38:13,644 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 223 transitions. Word has length 12 [2022-07-14 06:38:13,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:13,644 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 223 transitions. [2022-07-14 06:38:13,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:38:13,645 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 223 transitions. [2022-07-14 06:38:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 06:38:13,646 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:13,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:13,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:13,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:13,852 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:13,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:13,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1617164410, now seen corresponding path program 1 times [2022-07-14 06:38:13,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:13,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852788818] [2022-07-14 06:38:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:13,853 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:13,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:13,854 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:13,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-14 06:38:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:13,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 06:38:13,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:13,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:38:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:14,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:14,038 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:14,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852788818] [2022-07-14 06:38:14,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852788818] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:14,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:14,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 06:38:14,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873866353] [2022-07-14 06:38:14,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:14,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:38:14,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:14,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:38:14,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:38:14,045 INFO L87 Difference]: Start difference. First operand 206 states and 223 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:38:14,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:14,590 INFO L93 Difference]: Finished difference Result 231 states and 247 transitions. [2022-07-14 06:38:14,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:38:14,592 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-07-14 06:38:14,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:14,593 INFO L225 Difference]: With dead ends: 231 [2022-07-14 06:38:14,593 INFO L226 Difference]: Without dead ends: 231 [2022-07-14 06:38:14,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:38:14,594 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 35 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:14,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1070 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:38:14,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-14 06:38:14,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 206. [2022-07-14 06:38:14,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 114 states have (on average 1.7719298245614035) internal successors, (202), 189 states have internal predecessors, (202), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-14 06:38:14,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 221 transitions. [2022-07-14 06:38:14,602 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 221 transitions. Word has length 12 [2022-07-14 06:38:14,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:14,603 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 221 transitions. [2022-07-14 06:38:14,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:38:14,603 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 221 transitions. [2022-07-14 06:38:14,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 06:38:14,603 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:14,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:14,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:14,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:14,812 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:14,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:14,813 INFO L85 PathProgramCache]: Analyzing trace with hash -934992552, now seen corresponding path program 1 times [2022-07-14 06:38:14,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:14,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957087609] [2022-07-14 06:38:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:14,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:14,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:14,815 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:14,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-14 06:38:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:14,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:38:14,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:14,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:14,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:14,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957087609] [2022-07-14 06:38:14,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957087609] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:14,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:14,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:38:14,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696963259] [2022-07-14 06:38:14,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:14,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:38:14,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:14,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:38:14,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:38:14,906 INFO L87 Difference]: Start difference. First operand 206 states and 221 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:38:14,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:14,930 INFO L93 Difference]: Finished difference Result 218 states and 233 transitions. [2022-07-14 06:38:14,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:38:14,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-07-14 06:38:14,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:14,935 INFO L225 Difference]: With dead ends: 218 [2022-07-14 06:38:14,935 INFO L226 Difference]: Without dead ends: 218 [2022-07-14 06:38:14,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:38:14,936 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 20 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:14,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 820 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:38:14,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-07-14 06:38:14,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 197. [2022-07-14 06:38:14,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 110 states have (on average 1.7636363636363637) internal successors, (194), 181 states have internal predecessors, (194), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-14 06:38:14,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 211 transitions. [2022-07-14 06:38:14,942 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 211 transitions. Word has length 12 [2022-07-14 06:38:14,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:14,943 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 211 transitions. [2022-07-14 06:38:14,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:38:14,943 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 211 transitions. [2022-07-14 06:38:14,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 06:38:14,943 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:14,943 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:14,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-14 06:38:15,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:15,152 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:15,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:15,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1617078937, now seen corresponding path program 1 times [2022-07-14 06:38:15,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:15,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457044313] [2022-07-14 06:38:15,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:15,153 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:15,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:15,155 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:15,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-14 06:38:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:15,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:38:15,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:15,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:15,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:15,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457044313] [2022-07-14 06:38:15,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457044313] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:15,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:15,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:38:15,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225817702] [2022-07-14 06:38:15,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:15,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:38:15,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:15,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:38:15,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:38:15,234 INFO L87 Difference]: Start difference. First operand 197 states and 211 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:38:15,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:15,261 INFO L93 Difference]: Finished difference Result 218 states and 232 transitions. [2022-07-14 06:38:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:38:15,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-07-14 06:38:15,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:15,263 INFO L225 Difference]: With dead ends: 218 [2022-07-14 06:38:15,263 INFO L226 Difference]: Without dead ends: 218 [2022-07-14 06:38:15,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:38:15,264 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 123 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:15,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 756 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:38:15,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-07-14 06:38:15,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 197. [2022-07-14 06:38:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 110 states have (on average 1.7545454545454546) internal successors, (193), 181 states have internal predecessors, (193), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-14 06:38:15,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 210 transitions. [2022-07-14 06:38:15,281 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 210 transitions. Word has length 12 [2022-07-14 06:38:15,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:15,281 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 210 transitions. [2022-07-14 06:38:15,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:38:15,281 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 210 transitions. [2022-07-14 06:38:15,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 06:38:15,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:15,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:15,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:15,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:15,490 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:15,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:15,490 INFO L85 PathProgramCache]: Analyzing trace with hash -935078024, now seen corresponding path program 1 times [2022-07-14 06:38:15,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:15,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030563856] [2022-07-14 06:38:15,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:15,491 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:15,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:15,493 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:15,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-14 06:38:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:15,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:38:15,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:15,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:15,559 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:15,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030563856] [2022-07-14 06:38:15,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030563856] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:15,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:15,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:38:15,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121904873] [2022-07-14 06:38:15,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:15,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:38:15,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:15,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:38:15,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:38:15,561 INFO L87 Difference]: Start difference. First operand 197 states and 210 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:38:15,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:15,585 INFO L93 Difference]: Finished difference Result 202 states and 214 transitions. [2022-07-14 06:38:15,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:38:15,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-07-14 06:38:15,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:15,586 INFO L225 Difference]: With dead ends: 202 [2022-07-14 06:38:15,586 INFO L226 Difference]: Without dead ends: 202 [2022-07-14 06:38:15,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:38:15,587 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 106 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:15,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 708 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:38:15,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-14 06:38:15,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2022-07-14 06:38:15,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 112 states have (on average 1.7410714285714286) internal successors, (195), 183 states have internal predecessors, (195), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-14 06:38:15,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 212 transitions. [2022-07-14 06:38:15,591 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 212 transitions. Word has length 12 [2022-07-14 06:38:15,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:15,591 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 212 transitions. [2022-07-14 06:38:15,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:38:15,592 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 212 transitions. [2022-07-14 06:38:15,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:38:15,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:15,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:15,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:15,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:15,799 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_LEAK === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:15,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:15,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1077372438, now seen corresponding path program 1 times [2022-07-14 06:38:15,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:15,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617512588] [2022-07-14 06:38:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:15,800 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:15,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:15,801 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:15,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-14 06:38:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:15,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:38:15,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:15,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:15,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:15,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617512588] [2022-07-14 06:38:15,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617512588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:15,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:15,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:38:15,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125636392] [2022-07-14 06:38:15,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:15,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:38:15,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:15,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:38:15,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:38:15,861 INFO L87 Difference]: Start difference. First operand 199 states and 212 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:38:16,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:16,101 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2022-07-14 06:38:16,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:38:16,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-07-14 06:38:16,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:16,103 INFO L225 Difference]: With dead ends: 211 [2022-07-14 06:38:16,103 INFO L226 Difference]: Without dead ends: 203 [2022-07-14 06:38:16,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:38:16,104 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 51 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:16,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 388 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:38:16,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-14 06:38:16,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 193. [2022-07-14 06:38:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 107 states have (on average 1.766355140186916) internal successors, (189), 178 states have internal predecessors, (189), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-14 06:38:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 205 transitions. [2022-07-14 06:38:16,108 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 205 transitions. Word has length 13 [2022-07-14 06:38:16,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:16,108 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 205 transitions. [2022-07-14 06:38:16,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:38:16,108 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 205 transitions. [2022-07-14 06:38:16,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 06:38:16,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:16,109 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:16,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-14 06:38:16,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:16,319 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:16,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:16,324 INFO L85 PathProgramCache]: Analyzing trace with hash 609549957, now seen corresponding path program 1 times [2022-07-14 06:38:16,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:16,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351819135] [2022-07-14 06:38:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:16,325 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:16,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:16,326 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:16,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-14 06:38:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:16,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 06:38:16,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:16,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:16,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:38:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:16,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:16,543 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:16,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351819135] [2022-07-14 06:38:16,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351819135] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:16,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:16,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:38:16,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234686683] [2022-07-14 06:38:16,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:16,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:38:16,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:16,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:38:16,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:38:16,545 INFO L87 Difference]: Start difference. First operand 193 states and 205 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:38:17,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:17,112 INFO L93 Difference]: Finished difference Result 203 states and 218 transitions. [2022-07-14 06:38:17,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:38:17,113 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-07-14 06:38:17,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:17,114 INFO L225 Difference]: With dead ends: 203 [2022-07-14 06:38:17,114 INFO L226 Difference]: Without dead ends: 203 [2022-07-14 06:38:17,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:38:17,114 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 58 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:17,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 592 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 443 Invalid, 0 Unknown, 120 Unchecked, 0.5s Time] [2022-07-14 06:38:17,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-14 06:38:17,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 192. [2022-07-14 06:38:17,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 107 states have (on average 1.7570093457943925) internal successors, (188), 177 states have internal predecessors, (188), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-14 06:38:17,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 204 transitions. [2022-07-14 06:38:17,118 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 204 transitions. Word has length 16 [2022-07-14 06:38:17,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:17,119 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 204 transitions. [2022-07-14 06:38:17,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:38:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 204 transitions. [2022-07-14 06:38:17,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 06:38:17,119 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:17,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:17,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:17,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:17,326 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:17,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:17,327 INFO L85 PathProgramCache]: Analyzing trace with hash 609549956, now seen corresponding path program 1 times [2022-07-14 06:38:17,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:17,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638443221] [2022-07-14 06:38:17,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:17,327 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:17,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:17,328 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:17,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-14 06:38:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:17,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 06:38:17,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:17,474 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:38:17,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-14 06:38:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:17,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:17,507 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:17,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638443221] [2022-07-14 06:38:17,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638443221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:17,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:17,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:38:17,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093653544] [2022-07-14 06:38:17,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:17,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:38:17,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:17,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:38:17,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:38:17,509 INFO L87 Difference]: Start difference. First operand 192 states and 204 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 06:38:17,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:17,961 INFO L93 Difference]: Finished difference Result 244 states and 259 transitions. [2022-07-14 06:38:17,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:38:17,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2022-07-14 06:38:17,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:17,964 INFO L225 Difference]: With dead ends: 244 [2022-07-14 06:38:17,964 INFO L226 Difference]: Without dead ends: 244 [2022-07-14 06:38:17,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:38:17,965 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 195 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:17,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 528 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 360 Invalid, 0 Unknown, 130 Unchecked, 0.4s Time] [2022-07-14 06:38:17,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-07-14 06:38:17,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 202. [2022-07-14 06:38:17,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 116 states have (on average 1.7413793103448276) internal successors, (202), 186 states have internal predecessors, (202), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-14 06:38:17,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 220 transitions. [2022-07-14 06:38:17,973 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 220 transitions. Word has length 16 [2022-07-14 06:38:17,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:17,973 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 220 transitions. [2022-07-14 06:38:17,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 06:38:17,973 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 220 transitions. [2022-07-14 06:38:17,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:38:17,974 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:17,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:17,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:18,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:18,180 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:18,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:18,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1600340348, now seen corresponding path program 1 times [2022-07-14 06:38:18,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:18,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604901283] [2022-07-14 06:38:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:18,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:18,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:18,183 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) [2022-07-14 06:38:18,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-14 06:38:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:18,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:38:18,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:18,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:38:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:18,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:18,285 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:18,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604901283] [2022-07-14 06:38:18,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604901283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:18,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:18,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:38:18,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842698699] [2022-07-14 06:38:18,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:18,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:38:18,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:18,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:38:18,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:38:18,287 INFO L87 Difference]: Start difference. First operand 202 states and 220 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:38:18,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:18,662 INFO L93 Difference]: Finished difference Result 252 states and 278 transitions. [2022-07-14 06:38:18,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:38:18,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-07-14 06:38:18,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:18,664 INFO L225 Difference]: With dead ends: 252 [2022-07-14 06:38:18,664 INFO L226 Difference]: Without dead ends: 252 [2022-07-14 06:38:18,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:38:18,665 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 65 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:18,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 633 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:38:18,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-07-14 06:38:18,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 227. [2022-07-14 06:38:18,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 143 states have (on average 1.7622377622377623) internal successors, (252), 211 states have internal predecessors, (252), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-14 06:38:18,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 270 transitions. [2022-07-14 06:38:18,670 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 270 transitions. Word has length 25 [2022-07-14 06:38:18,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:18,671 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 270 transitions. [2022-07-14 06:38:18,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:38:18,671 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 270 transitions. [2022-07-14 06:38:18,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:38:18,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:18,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:18,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:18,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:18,872 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:18,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:18,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1600340347, now seen corresponding path program 1 times [2022-07-14 06:38:18,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:18,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353477891] [2022-07-14 06:38:18,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:18,873 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:18,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:18,874 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:18,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-14 06:38:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:18,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:38:18,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:18,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:38:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:19,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:19,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:19,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353477891] [2022-07-14 06:38:19,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353477891] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:19,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:19,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:38:19,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883398695] [2022-07-14 06:38:19,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:19,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:38:19,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:19,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:38:19,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:38:19,014 INFO L87 Difference]: Start difference. First operand 227 states and 270 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:38:19,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:19,532 INFO L93 Difference]: Finished difference Result 284 states and 313 transitions. [2022-07-14 06:38:19,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:38:19,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-07-14 06:38:19,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:19,534 INFO L225 Difference]: With dead ends: 284 [2022-07-14 06:38:19,534 INFO L226 Difference]: Without dead ends: 284 [2022-07-14 06:38:19,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:38:19,534 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 99 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:19,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 631 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:38:19,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-07-14 06:38:19,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 229. [2022-07-14 06:38:19,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 146 states have (on average 1.7397260273972603) internal successors, (254), 212 states have internal predecessors, (254), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-14 06:38:19,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 275 transitions. [2022-07-14 06:38:19,539 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 275 transitions. Word has length 25 [2022-07-14 06:38:19,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:19,539 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 275 transitions. [2022-07-14 06:38:19,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:38:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 275 transitions. [2022-07-14 06:38:19,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 06:38:19,540 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:19,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:19,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:19,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:19,747 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:19,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:19,747 INFO L85 PathProgramCache]: Analyzing trace with hash -328716411, now seen corresponding path program 1 times [2022-07-14 06:38:19,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:19,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901487311] [2022-07-14 06:38:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:19,748 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:19,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:19,749 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) [2022-07-14 06:38:19,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-14 06:38:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:19,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 06:38:19,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:19,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:19,840 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:19,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901487311] [2022-07-14 06:38:19,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901487311] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:19,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:19,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:38:19,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952919185] [2022-07-14 06:38:19,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:19,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:38:19,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:19,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:38:19,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:38:19,842 INFO L87 Difference]: Start difference. First operand 229 states and 275 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:38:19,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:19,912 INFO L93 Difference]: Finished difference Result 229 states and 274 transitions. [2022-07-14 06:38:19,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:38:19,912 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-07-14 06:38:19,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:19,913 INFO L225 Difference]: With dead ends: 229 [2022-07-14 06:38:19,913 INFO L226 Difference]: Without dead ends: 229 [2022-07-14 06:38:19,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:38:19,914 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 114 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:19,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 808 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:38:19,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-07-14 06:38:19,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-07-14 06:38:19,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 146 states have (on average 1.7328767123287672) internal successors, (253), 212 states have internal predecessors, (253), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-14 06:38:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 274 transitions. [2022-07-14 06:38:19,918 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 274 transitions. Word has length 27 [2022-07-14 06:38:19,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:19,919 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 274 transitions. [2022-07-14 06:38:19,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:38:19,919 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 274 transitions. [2022-07-14 06:38:19,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-14 06:38:19,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:19,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:19,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:20,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:20,120 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:20,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:20,120 INFO L85 PathProgramCache]: Analyzing trace with hash -444952336, now seen corresponding path program 1 times [2022-07-14 06:38:20,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:20,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524706862] [2022-07-14 06:38:20,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:20,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:20,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:20,122 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:20,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-14 06:38:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:20,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:38:20,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:20,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:38:20,289 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 06:38:20,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-14 06:38:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:20,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:20,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:20,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524706862] [2022-07-14 06:38:20,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524706862] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:20,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:20,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 06:38:20,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285165806] [2022-07-14 06:38:20,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:20,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:38:20,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:20,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:38:20,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:38:20,340 INFO L87 Difference]: Start difference. First operand 229 states and 274 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:38:20,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:20,870 INFO L93 Difference]: Finished difference Result 242 states and 284 transitions. [2022-07-14 06:38:20,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:38:20,871 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2022-07-14 06:38:20,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:20,872 INFO L225 Difference]: With dead ends: 242 [2022-07-14 06:38:20,872 INFO L226 Difference]: Without dead ends: 242 [2022-07-14 06:38:20,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:38:20,872 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 191 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:20,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 537 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:38:20,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-07-14 06:38:20,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 225. [2022-07-14 06:38:20,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 146 states have (on average 1.678082191780822) internal successors, (245), 208 states have internal predecessors, (245), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-14 06:38:20,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 266 transitions. [2022-07-14 06:38:20,877 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 266 transitions. Word has length 33 [2022-07-14 06:38:20,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:20,877 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 266 transitions. [2022-07-14 06:38:20,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:38:20,877 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 266 transitions. [2022-07-14 06:38:20,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-14 06:38:20,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:20,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:20,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:21,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:21,086 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:21,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:21,086 INFO L85 PathProgramCache]: Analyzing trace with hash -444952335, now seen corresponding path program 1 times [2022-07-14 06:38:21,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:21,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322043130] [2022-07-14 06:38:21,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:21,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:21,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:21,088 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:21,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-14 06:38:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:21,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 06:38:21,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:21,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:38:21,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:38:23,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:23,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:38:23,317 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:38:23,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-14 06:38:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:23,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:23,393 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:23,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322043130] [2022-07-14 06:38:23,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322043130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:23,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:23,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:38:23,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546655796] [2022-07-14 06:38:23,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:23,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:38:23,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:23,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:38:23,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=29, Unknown=1, NotChecked=0, Total=42 [2022-07-14 06:38:23,394 INFO L87 Difference]: Start difference. First operand 225 states and 266 transitions. Second operand has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:38:24,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:24,036 INFO L93 Difference]: Finished difference Result 280 states and 309 transitions. [2022-07-14 06:38:24,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:38:24,036 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2022-07-14 06:38:24,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:24,038 INFO L225 Difference]: With dead ends: 280 [2022-07-14 06:38:24,038 INFO L226 Difference]: Without dead ends: 280 [2022-07-14 06:38:24,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=16, Invalid=39, Unknown=1, NotChecked=0, Total=56 [2022-07-14 06:38:24,038 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 180 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:24,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 484 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 377 Invalid, 0 Unknown, 142 Unchecked, 0.6s Time] [2022-07-14 06:38:24,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-07-14 06:38:24,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 225. [2022-07-14 06:38:24,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 146 states have (on average 1.6506849315068493) internal successors, (241), 208 states have internal predecessors, (241), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-14 06:38:24,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 262 transitions. [2022-07-14 06:38:24,043 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 262 transitions. Word has length 33 [2022-07-14 06:38:24,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:24,043 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 262 transitions. [2022-07-14 06:38:24,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:38:24,043 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 262 transitions. [2022-07-14 06:38:24,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-14 06:38:24,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:24,044 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:24,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:24,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:24,252 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:24,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1897494371, now seen corresponding path program 1 times [2022-07-14 06:38:24,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:24,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051908728] [2022-07-14 06:38:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:24,253 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:24,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:24,254 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:24,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-14 06:38:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:24,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 06:38:24,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:24,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:24,368 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:24,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051908728] [2022-07-14 06:38:24,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051908728] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:24,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:24,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:38:24,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23349878] [2022-07-14 06:38:24,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:24,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:38:24,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:24,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:38:24,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:38:24,370 INFO L87 Difference]: Start difference. First operand 225 states and 262 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:38:24,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:24,384 INFO L93 Difference]: Finished difference Result 267 states and 308 transitions. [2022-07-14 06:38:24,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:38:24,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2022-07-14 06:38:24,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:24,386 INFO L225 Difference]: With dead ends: 267 [2022-07-14 06:38:24,386 INFO L226 Difference]: Without dead ends: 267 [2022-07-14 06:38:24,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:38:24,386 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 36 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:24,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 574 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:38:24,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-07-14 06:38:24,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 229. [2022-07-14 06:38:24,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 150 states have (on average 1.6333333333333333) internal successors, (245), 212 states have internal predecessors, (245), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-14 06:38:24,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 266 transitions. [2022-07-14 06:38:24,391 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 266 transitions. Word has length 35 [2022-07-14 06:38:24,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:24,391 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 266 transitions. [2022-07-14 06:38:24,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:38:24,392 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 266 transitions. [2022-07-14 06:38:24,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-14 06:38:24,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:24,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:24,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:24,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:24,600 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:24,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:24,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1307216555, now seen corresponding path program 1 times [2022-07-14 06:38:24,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:24,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011807627] [2022-07-14 06:38:24,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:24,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:24,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:24,602 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:24,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-14 06:38:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:24,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 06:38:24,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:24,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:24,990 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:24,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011807627] [2022-07-14 06:38:24,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011807627] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:24,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:24,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:38:24,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463833037] [2022-07-14 06:38:24,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:24,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:38:24,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:24,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:38:24,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:38:24,991 INFO L87 Difference]: Start difference. First operand 229 states and 266 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:38:24,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:24,997 INFO L93 Difference]: Finished difference Result 248 states and 286 transitions. [2022-07-14 06:38:24,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:38:24,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-07-14 06:38:24,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:24,998 INFO L225 Difference]: With dead ends: 248 [2022-07-14 06:38:24,998 INFO L226 Difference]: Without dead ends: 248 [2022-07-14 06:38:24,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:38:24,999 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 55 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:24,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 710 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 42 Unchecked, 0.0s Time] [2022-07-14 06:38:25,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-07-14 06:38:25,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2022-07-14 06:38:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 168 states have (on average 1.5773809523809523) internal successors, (265), 230 states have internal predecessors, (265), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-14 06:38:25,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 286 transitions. [2022-07-14 06:38:25,003 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 286 transitions. Word has length 36 [2022-07-14 06:38:25,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:25,004 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 286 transitions. [2022-07-14 06:38:25,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:38:25,004 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 286 transitions. [2022-07-14 06:38:25,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-14 06:38:25,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:25,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:25,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:25,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:25,212 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:25,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:25,213 INFO L85 PathProgramCache]: Analyzing trace with hash 359927496, now seen corresponding path program 1 times [2022-07-14 06:38:25,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:25,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288659474] [2022-07-14 06:38:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:25,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:25,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:25,214 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:25,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-14 06:38:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:25,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 06:38:25,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:25,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:25,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:25,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288659474] [2022-07-14 06:38:25,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288659474] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:25,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:25,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:38:25,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863094238] [2022-07-14 06:38:25,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:25,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:38:25,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:25,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:38:25,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:38:25,336 INFO L87 Difference]: Start difference. First operand 248 states and 286 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:38:25,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:25,360 INFO L93 Difference]: Finished difference Result 271 states and 311 transitions. [2022-07-14 06:38:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:38:25,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-07-14 06:38:25,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:25,362 INFO L225 Difference]: With dead ends: 271 [2022-07-14 06:38:25,362 INFO L226 Difference]: Without dead ends: 271 [2022-07-14 06:38:25,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:38:25,363 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 43 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:25,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 572 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:38:25,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-07-14 06:38:25,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 250. [2022-07-14 06:38:25,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 170 states have (on average 1.5705882352941176) internal successors, (267), 232 states have internal predecessors, (267), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-14 06:38:25,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 288 transitions. [2022-07-14 06:38:25,371 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 288 transitions. Word has length 40 [2022-07-14 06:38:25,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:25,371 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 288 transitions. [2022-07-14 06:38:25,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:38:25,372 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 288 transitions. [2022-07-14 06:38:25,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-14 06:38:25,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:25,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:25,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:25,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:25,582 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:25,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:25,582 INFO L85 PathProgramCache]: Analyzing trace with hash -2125965028, now seen corresponding path program 1 times [2022-07-14 06:38:25,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:25,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121948182] [2022-07-14 06:38:25,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:25,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:25,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:25,584 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:25,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-14 06:38:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:25,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 06:38:25,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:25,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:38:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:25,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:25,785 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:25,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121948182] [2022-07-14 06:38:25,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121948182] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:25,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:25,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:38:25,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962975009] [2022-07-14 06:38:25,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:25,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:38:25,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:25,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:38:25,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:38:25,786 INFO L87 Difference]: Start difference. First operand 250 states and 288 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:38:26,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:26,337 INFO L93 Difference]: Finished difference Result 292 states and 323 transitions. [2022-07-14 06:38:26,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:38:26,338 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-07-14 06:38:26,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:26,339 INFO L225 Difference]: With dead ends: 292 [2022-07-14 06:38:26,339 INFO L226 Difference]: Without dead ends: 292 [2022-07-14 06:38:26,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:38:26,339 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 124 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:26,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 811 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:38:26,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-07-14 06:38:26,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 249. [2022-07-14 06:38:26,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 170 states have (on average 1.5529411764705883) internal successors, (264), 231 states have internal predecessors, (264), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-14 06:38:26,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 285 transitions. [2022-07-14 06:38:26,344 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 285 transitions. Word has length 42 [2022-07-14 06:38:26,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:26,344 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 285 transitions. [2022-07-14 06:38:26,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:38:26,345 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 285 transitions. [2022-07-14 06:38:26,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-14 06:38:26,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:26,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:26,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:26,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:26,554 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:26,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:26,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2125965027, now seen corresponding path program 1 times [2022-07-14 06:38:26,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:26,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687131333] [2022-07-14 06:38:26,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:26,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:26,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:26,556 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:26,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-14 06:38:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:26,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 06:38:26,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:26,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:38:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:26,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:26,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:26,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687131333] [2022-07-14 06:38:26,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687131333] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:26,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:26,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:38:26,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896757911] [2022-07-14 06:38:26,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:26,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:38:26,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:26,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:38:26,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:38:26,811 INFO L87 Difference]: Start difference. First operand 249 states and 285 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:38:27,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:27,531 INFO L93 Difference]: Finished difference Result 318 states and 349 transitions. [2022-07-14 06:38:27,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:38:27,532 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-07-14 06:38:27,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:27,533 INFO L225 Difference]: With dead ends: 318 [2022-07-14 06:38:27,533 INFO L226 Difference]: Without dead ends: 318 [2022-07-14 06:38:27,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:38:27,534 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 146 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:27,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 839 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-14 06:38:27,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-07-14 06:38:27,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 249. [2022-07-14 06:38:27,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 170 states have (on average 1.5411764705882354) internal successors, (262), 231 states have internal predecessors, (262), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-14 06:38:27,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 283 transitions. [2022-07-14 06:38:27,539 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 283 transitions. Word has length 42 [2022-07-14 06:38:27,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:27,539 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 283 transitions. [2022-07-14 06:38:27,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:38:27,539 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 283 transitions. [2022-07-14 06:38:27,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-14 06:38:27,539 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:27,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:27,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:27,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:27,747 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:27,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:27,748 INFO L85 PathProgramCache]: Analyzing trace with hash -2001953137, now seen corresponding path program 1 times [2022-07-14 06:38:27,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:27,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466883176] [2022-07-14 06:38:27,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:27,748 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:27,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:27,749 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:27,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-14 06:38:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:27,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 06:38:27,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:27,977 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:38:27,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-14 06:38:28,150 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-14 06:38:28,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 21 [2022-07-14 06:38:28,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-14 06:38:30,307 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:38:30,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2022-07-14 06:38:30,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:30,673 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-14 06:38:30,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 17 treesize of output 28 [2022-07-14 06:38:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:30,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:30,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:30,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466883176] [2022-07-14 06:38:30,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466883176] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:30,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:30,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-14 06:38:30,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173502626] [2022-07-14 06:38:30,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:30,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-14 06:38:30,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:30,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-14 06:38:30,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=201, Unknown=1, NotChecked=0, Total=240 [2022-07-14 06:38:30,868 INFO L87 Difference]: Start difference. First operand 249 states and 283 transitions. Second operand has 16 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:38:31,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:31,137 INFO L93 Difference]: Finished difference Result 261 states and 298 transitions. [2022-07-14 06:38:31,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 06:38:31,137 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2022-07-14 06:38:31,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:31,138 INFO L225 Difference]: With dead ends: 261 [2022-07-14 06:38:31,138 INFO L226 Difference]: Without dead ends: 261 [2022-07-14 06:38:31,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=46, Invalid=259, Unknown=1, NotChecked=0, Total=306 [2022-07-14 06:38:31,139 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 19 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 515 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:31,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1646 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 211 Invalid, 0 Unknown, 515 Unchecked, 0.2s Time] [2022-07-14 06:38:31,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-07-14 06:38:31,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 257. [2022-07-14 06:38:31,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 178 states have (on average 1.5280898876404494) internal successors, (272), 239 states have internal predecessors, (272), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-14 06:38:31,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 293 transitions. [2022-07-14 06:38:31,146 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 293 transitions. Word has length 42 [2022-07-14 06:38:31,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:31,146 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 293 transitions. [2022-07-14 06:38:31,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:38:31,147 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 293 transitions. [2022-07-14 06:38:31,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-14 06:38:31,147 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:31,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:31,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:31,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:31,357 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:31,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:31,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2001953136, now seen corresponding path program 1 times [2022-07-14 06:38:31,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:31,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935309547] [2022-07-14 06:38:31,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:31,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:31,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:31,359 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:31,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-14 06:38:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:31,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-14 06:38:31,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:31,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:31,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-14 06:38:31,614 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-14 06:38:31,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:38:31,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:31,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:38:31,901 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:38:31,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:38:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:32,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:32,027 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:32,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935309547] [2022-07-14 06:38:32,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935309547] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:32,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:32,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-14 06:38:32,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537161015] [2022-07-14 06:38:32,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:32,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:38:32,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:32,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:38:32,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:38:32,028 INFO L87 Difference]: Start difference. First operand 257 states and 293 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:38:32,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:32,747 INFO L93 Difference]: Finished difference Result 275 states and 310 transitions. [2022-07-14 06:38:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:38:32,748 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2022-07-14 06:38:32,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:32,749 INFO L225 Difference]: With dead ends: 275 [2022-07-14 06:38:32,749 INFO L226 Difference]: Without dead ends: 275 [2022-07-14 06:38:32,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-07-14 06:38:32,750 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 29 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:32,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1063 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 535 Invalid, 0 Unknown, 212 Unchecked, 0.6s Time] [2022-07-14 06:38:32,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-07-14 06:38:32,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 260. [2022-07-14 06:38:32,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 180 states have (on average 1.5222222222222221) internal successors, (274), 241 states have internal predecessors, (274), 10 states have call successors, (10), 8 states have call predecessors, (10), 9 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-14 06:38:32,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 298 transitions. [2022-07-14 06:38:32,766 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 298 transitions. Word has length 42 [2022-07-14 06:38:32,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:32,766 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 298 transitions. [2022-07-14 06:38:32,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:38:32,766 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 298 transitions. [2022-07-14 06:38:32,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-14 06:38:32,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:32,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:32,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:32,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:32,976 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_LEAK === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:32,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:32,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1930984993, now seen corresponding path program 1 times [2022-07-14 06:38:32,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:32,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900601414] [2022-07-14 06:38:32,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:32,977 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:32,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:32,978 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:32,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-14 06:38:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:33,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 06:38:33,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:33,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:33,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:33,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900601414] [2022-07-14 06:38:33,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900601414] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:33,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:33,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:38:33,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964747692] [2022-07-14 06:38:33,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:33,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:38:33,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:33,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:38:33,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:38:33,103 INFO L87 Difference]: Start difference. First operand 260 states and 298 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:38:33,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:33,121 INFO L93 Difference]: Finished difference Result 284 states and 321 transitions. [2022-07-14 06:38:33,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:38:33,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-07-14 06:38:33,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:33,123 INFO L225 Difference]: With dead ends: 284 [2022-07-14 06:38:33,123 INFO L226 Difference]: Without dead ends: 284 [2022-07-14 06:38:33,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:38:33,124 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 53 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:33,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 557 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:38:33,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-07-14 06:38:33,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 262. [2022-07-14 06:38:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 182 states have (on average 1.510989010989011) internal successors, (275), 243 states have internal predecessors, (275), 10 states have call successors, (10), 8 states have call predecessors, (10), 9 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-14 06:38:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 299 transitions. [2022-07-14 06:38:33,133 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 299 transitions. Word has length 43 [2022-07-14 06:38:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:33,133 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 299 transitions. [2022-07-14 06:38:33,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:38:33,133 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 299 transitions. [2022-07-14 06:38:33,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-14 06:38:33,134 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:33,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:33,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:33,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:33,342 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:33,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:33,342 INFO L85 PathProgramCache]: Analyzing trace with hash -269786093, now seen corresponding path program 1 times [2022-07-14 06:38:33,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:33,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291542761] [2022-07-14 06:38:33,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:33,342 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:33,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:33,343 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:33,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-14 06:38:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:33,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-14 06:38:33,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:33,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:38:33,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:38:33,662 INFO L356 Elim1Store]: treesize reduction 54, result has 37.9 percent of original size [2022-07-14 06:38:33,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 47 [2022-07-14 06:38:33,700 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:38:33,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-14 06:38:33,921 INFO L356 Elim1Store]: treesize reduction 54, result has 37.9 percent of original size [2022-07-14 06:38:33,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 51 [2022-07-14 06:38:34,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-07-14 06:38:34,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-07-14 06:38:34,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:34,652 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:38:34,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 35 [2022-07-14 06:38:34,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-14 06:38:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:34,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:34,827 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:34,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291542761] [2022-07-14 06:38:34,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291542761] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:34,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:34,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-14 06:38:34,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315682701] [2022-07-14 06:38:34,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:34,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-14 06:38:34,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:34,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-14 06:38:34,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-07-14 06:38:34,829 INFO L87 Difference]: Start difference. First operand 262 states and 299 transitions. Second operand has 19 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:38:35,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:35,457 INFO L93 Difference]: Finished difference Result 314 states and 353 transitions. [2022-07-14 06:38:35,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 06:38:35,459 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-07-14 06:38:35,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:35,460 INFO L225 Difference]: With dead ends: 314 [2022-07-14 06:38:35,460 INFO L226 Difference]: Without dead ends: 314 [2022-07-14 06:38:35,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-07-14 06:38:35,460 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 150 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:35,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 1338 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 441 Invalid, 0 Unknown, 442 Unchecked, 0.4s Time] [2022-07-14 06:38:35,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-07-14 06:38:35,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 286. [2022-07-14 06:38:35,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 203 states have (on average 1.541871921182266) internal successors, (313), 264 states have internal predecessors, (313), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:38:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 338 transitions. [2022-07-14 06:38:35,468 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 338 transitions. Word has length 45 [2022-07-14 06:38:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:35,468 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 338 transitions. [2022-07-14 06:38:35,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:38:35,469 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 338 transitions. [2022-07-14 06:38:35,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-14 06:38:35,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:35,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:35,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:35,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:35,677 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:35,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:35,677 INFO L85 PathProgramCache]: Analyzing trace with hash -269786092, now seen corresponding path program 1 times [2022-07-14 06:38:35,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:35,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571746850] [2022-07-14 06:38:35,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:35,678 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:35,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:35,679 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:35,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-14 06:38:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:35,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-14 06:38:35,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:35,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:38:35,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:38:36,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:38:36,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:38:36,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:36,285 INFO L356 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-07-14 06:38:36,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 36 [2022-07-14 06:38:36,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:36,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 18 [2022-07-14 06:38:36,389 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:38:36,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 9 [2022-07-14 06:38:36,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-14 06:38:36,718 INFO L356 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-07-14 06:38:36,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-07-14 06:38:36,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 18 [2022-07-14 06:38:37,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-14 06:38:37,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-14 06:38:37,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-14 06:38:37,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-14 06:38:37,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:38:37,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-07-14 06:38:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:37,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:37,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:37,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571746850] [2022-07-14 06:38:37,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571746850] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:37,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:37,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-14 06:38:37,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894883667] [2022-07-14 06:38:37,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:37,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-14 06:38:37,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:37,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 06:38:37,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:38:37,706 INFO L87 Difference]: Start difference. First operand 286 states and 338 transitions. Second operand has 21 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:38:38,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:38,257 INFO L93 Difference]: Finished difference Result 286 states and 337 transitions. [2022-07-14 06:38:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 06:38:38,258 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-07-14 06:38:38,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:38,259 INFO L225 Difference]: With dead ends: 286 [2022-07-14 06:38:38,259 INFO L226 Difference]: Without dead ends: 286 [2022-07-14 06:38:38,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-07-14 06:38:38,259 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 28 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:38,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1498 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 221 Invalid, 0 Unknown, 400 Unchecked, 0.4s Time] [2022-07-14 06:38:38,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-07-14 06:38:38,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2022-07-14 06:38:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 203 states have (on average 1.5369458128078817) internal successors, (312), 264 states have internal predecessors, (312), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:38:38,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 337 transitions. [2022-07-14 06:38:38,266 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 337 transitions. Word has length 45 [2022-07-14 06:38:38,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:38,267 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 337 transitions. [2022-07-14 06:38:38,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:38:38,267 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 337 transitions. [2022-07-14 06:38:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-14 06:38:38,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:38,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:38,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:38,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:38,475 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:38,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:38,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1036278110, now seen corresponding path program 1 times [2022-07-14 06:38:38,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:38,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [539377946] [2022-07-14 06:38:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:38,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:38,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:38,477 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:38,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-14 06:38:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:38,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-14 06:38:38,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:38,861 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:38:38,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2022-07-14 06:38:38,970 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 06:38:38,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-14 06:38:39,097 INFO L356 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2022-07-14 06:38:39,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 41 [2022-07-14 06:38:39,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:38:39,445 INFO L356 Elim1Store]: treesize reduction 288, result has 10.8 percent of original size [2022-07-14 06:38:39,445 INFO L390 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 4 case distinctions, treesize of input 36 treesize of output 47 [2022-07-14 06:38:39,608 INFO L390 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 14 treesize of output 16 [2022-07-14 06:38:39,634 INFO L390 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 14 treesize of output 16 [2022-07-14 06:38:39,689 INFO L390 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 14 treesize of output 16 [2022-07-14 06:38:39,729 INFO L390 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 14 treesize of output 16 [2022-07-14 06:38:39,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-07-14 06:38:40,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:40,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:40,143 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:40,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [539377946] [2022-07-14 06:38:40,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [539377946] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:40,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:40,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-14 06:38:40,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139603004] [2022-07-14 06:38:40,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:40,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-14 06:38:40,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:40,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-14 06:38:40,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2022-07-14 06:38:40,147 INFO L87 Difference]: Start difference. First operand 286 states and 337 transitions. Second operand has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:38:42,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:42,155 INFO L93 Difference]: Finished difference Result 304 states and 362 transitions. [2022-07-14 06:38:42,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 06:38:42,156 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-07-14 06:38:42,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:42,157 INFO L225 Difference]: With dead ends: 304 [2022-07-14 06:38:42,157 INFO L226 Difference]: Without dead ends: 304 [2022-07-14 06:38:42,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-07-14 06:38:42,158 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 66 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 746 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:42,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1520 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 371 Invalid, 0 Unknown, 746 Unchecked, 0.3s Time] [2022-07-14 06:38:42,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-07-14 06:38:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 290. [2022-07-14 06:38:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 207 states have (on average 1.5314009661835748) internal successors, (317), 268 states have internal predecessors, (317), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:38:42,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 342 transitions. [2022-07-14 06:38:42,163 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 342 transitions. Word has length 45 [2022-07-14 06:38:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:42,163 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 342 transitions. [2022-07-14 06:38:42,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:38:42,163 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 342 transitions. [2022-07-14 06:38:42,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-14 06:38:42,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:42,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:42,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:42,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:42,374 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:42,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:42,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1036278109, now seen corresponding path program 1 times [2022-07-14 06:38:42,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:42,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497597099] [2022-07-14 06:38:42,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:42,376 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:42,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:42,376 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:42,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-14 06:38:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:42,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-14 06:38:42,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:42,712 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 06:38:42,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-14 06:38:42,828 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:38:42,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-14 06:38:42,852 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 06:38:42,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-14 06:38:42,900 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:38:42,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:38:43,032 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:38:43,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-07-14 06:38:43,061 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-14 06:38:43,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 20 [2022-07-14 06:38:43,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:38:43,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:38:43,448 INFO L356 Elim1Store]: treesize reduction 288, result has 10.8 percent of original size [2022-07-14 06:38:43,449 INFO L390 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 4 case distinctions, treesize of input 36 treesize of output 47 [2022-07-14 06:38:43,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:43,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:43,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:43,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:43,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:43,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:43,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:43,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:43,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:43,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:43,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2022-07-14 06:38:43,602 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:38:43,602 INFO L390 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-14 06:38:43,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:38:43,640 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:38:43,640 INFO L390 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-14 06:38:43,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:38:43,747 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:38:43,747 INFO L390 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-14 06:38:43,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:38:43,783 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:38:43,783 INFO L390 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-14 06:38:43,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:38:43,899 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:38:43,899 INFO L390 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-14 06:38:43,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:38:43,931 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:38:43,931 INFO L390 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-14 06:38:43,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:38:44,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:44,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-14 06:38:44,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:44,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-14 06:38:44,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-07-14 06:38:44,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-07-14 06:38:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:44,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:44,402 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:44,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497597099] [2022-07-14 06:38:44,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497597099] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:44,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:44,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-14 06:38:44,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774949567] [2022-07-14 06:38:44,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:44,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-14 06:38:44,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:44,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-14 06:38:44,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:38:44,403 INFO L87 Difference]: Start difference. First operand 290 states and 342 transitions. Second operand has 22 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:38:45,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:45,584 INFO L93 Difference]: Finished difference Result 304 states and 361 transitions. [2022-07-14 06:38:45,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-14 06:38:45,585 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-07-14 06:38:45,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:45,586 INFO L225 Difference]: With dead ends: 304 [2022-07-14 06:38:45,586 INFO L226 Difference]: Without dead ends: 304 [2022-07-14 06:38:45,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-07-14 06:38:45,587 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 84 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 726 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:45,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1493 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 781 Invalid, 0 Unknown, 726 Unchecked, 0.7s Time] [2022-07-14 06:38:45,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-07-14 06:38:45,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 290. [2022-07-14 06:38:45,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 207 states have (on average 1.5265700483091786) internal successors, (316), 268 states have internal predecessors, (316), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:38:45,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 341 transitions. [2022-07-14 06:38:45,591 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 341 transitions. Word has length 45 [2022-07-14 06:38:45,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:45,591 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 341 transitions. [2022-07-14 06:38:45,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:38:45,591 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 341 transitions. [2022-07-14 06:38:45,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-14 06:38:45,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:45,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:45,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:45,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:45,801 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:45,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:45,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1566398444, now seen corresponding path program 1 times [2022-07-14 06:38:45,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:45,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144914144] [2022-07-14 06:38:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:45,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:45,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:45,803 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:45,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-14 06:38:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:45,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-14 06:38:45,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:46,119 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-14 06:38:46,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 39 [2022-07-14 06:38:46,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:38:46,462 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-14 06:38:46,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-14 06:38:46,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-14 06:38:46,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:38:46,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:46,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:46,790 INFO L356 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-07-14 06:38:46,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 58 [2022-07-14 06:38:46,912 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:38:46,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-07-14 06:38:47,214 INFO L356 Elim1Store]: treesize reduction 13, result has 68.3 percent of original size [2022-07-14 06:38:47,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 54 [2022-07-14 06:38:47,589 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:38:47,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 45 [2022-07-14 06:38:47,606 INFO L390 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 14 treesize of output 16 [2022-07-14 06:38:47,699 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:38:47,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 45 [2022-07-14 06:38:47,705 INFO L390 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 14 treesize of output 16 [2022-07-14 06:38:48,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:38:48,450 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:38:48,451 INFO L390 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 26 [2022-07-14 06:38:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:48,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:48,611 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:48,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144914144] [2022-07-14 06:38:48,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144914144] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:48,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:48,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-07-14 06:38:48,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803413973] [2022-07-14 06:38:48,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:48,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-14 06:38:48,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:48,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-14 06:38:48,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-07-14 06:38:48,612 INFO L87 Difference]: Start difference. First operand 290 states and 341 transitions. Second operand has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:38:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:49,295 INFO L93 Difference]: Finished difference Result 290 states and 340 transitions. [2022-07-14 06:38:49,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-14 06:38:49,296 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-07-14 06:38:49,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:49,301 INFO L225 Difference]: With dead ends: 290 [2022-07-14 06:38:49,301 INFO L226 Difference]: Without dead ends: 290 [2022-07-14 06:38:49,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-07-14 06:38:49,302 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 16 mSDsluCounter, 1571 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 478 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:49,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1740 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 307 Invalid, 0 Unknown, 478 Unchecked, 0.4s Time] [2022-07-14 06:38:49,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-07-14 06:38:49,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-07-14 06:38:49,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 207 states have (on average 1.5217391304347827) internal successors, (315), 268 states have internal predecessors, (315), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:38:49,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 340 transitions. [2022-07-14 06:38:49,307 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 340 transitions. Word has length 47 [2022-07-14 06:38:49,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:49,307 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 340 transitions. [2022-07-14 06:38:49,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:38:49,307 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 340 transitions. [2022-07-14 06:38:49,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-14 06:38:49,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:49,308 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:49,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:49,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:49,517 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting free_reportsErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:49,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:49,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1566398443, now seen corresponding path program 1 times [2022-07-14 06:38:49,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:49,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957075436] [2022-07-14 06:38:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:49,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:49,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:49,519 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:49,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-14 06:38:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:49,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-14 06:38:49,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:49,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:38:49,852 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:38:49,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-14 06:38:50,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:38:50,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:38:50,109 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-14 06:38:50,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-14 06:38:50,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:50,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-14 06:38:50,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-14 06:38:50,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-14 06:38:50,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:50,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 18 [2022-07-14 06:38:50,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:50,404 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:38:50,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2022-07-14 06:38:50,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 3 [2022-07-14 06:38:50,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-07-14 06:38:50,903 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-07-14 06:38:50,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2022-07-14 06:38:50,930 INFO L356 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-07-14 06:38:50,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2022-07-14 06:38:51,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2022-07-14 06:38:51,265 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:38:51,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 61 [2022-07-14 06:38:51,390 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:38:51,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 61 [2022-07-14 06:38:51,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2022-07-14 06:38:52,212 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 06:38:52,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 31 [2022-07-14 06:38:52,222 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:38:52,222 INFO L390 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 26 [2022-07-14 06:38:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:38:52,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:38:52,392 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:38:52,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957075436] [2022-07-14 06:38:52,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957075436] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:38:52,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:38:52,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-07-14 06:38:52,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625947890] [2022-07-14 06:38:52,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:38:52,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-14 06:38:52,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:38:52,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-14 06:38:52,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-07-14 06:38:52,394 INFO L87 Difference]: Start difference. First operand 290 states and 340 transitions. Second operand has 28 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:38:53,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:38:53,231 INFO L93 Difference]: Finished difference Result 290 states and 339 transitions. [2022-07-14 06:38:53,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-14 06:38:53,232 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-07-14 06:38:53,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:38:53,233 INFO L225 Difference]: With dead ends: 290 [2022-07-14 06:38:53,233 INFO L226 Difference]: Without dead ends: 290 [2022-07-14 06:38:53,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-07-14 06:38:53,234 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 9 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 966 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:38:53,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1780 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 288 Invalid, 0 Unknown, 966 Unchecked, 0.4s Time] [2022-07-14 06:38:53,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-07-14 06:38:53,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-07-14 06:38:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 207 states have (on average 1.5169082125603865) internal successors, (314), 268 states have internal predecessors, (314), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:38:53,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 339 transitions. [2022-07-14 06:38:53,238 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 339 transitions. Word has length 47 [2022-07-14 06:38:53,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:38:53,238 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 339 transitions. [2022-07-14 06:38:53,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:38:53,239 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 339 transitions. [2022-07-14 06:38:53,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-14 06:38:53,239 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:38:53,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:38:53,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-14 06:38:53,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:38:53,449 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:38:53,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:38:53,449 INFO L85 PathProgramCache]: Analyzing trace with hash 463879875, now seen corresponding path program 1 times [2022-07-14 06:38:53,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:38:53,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857659192] [2022-07-14 06:38:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:38:53,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:38:53,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:38:53,451 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:38:53,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-14 06:38:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:38:53,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-14 06:38:53,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:38:54,046 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:38:54,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 32 [2022-07-14 06:38:54,228 INFO L390 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 [2022-07-14 06:38:54,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:54,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:54,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:54,278 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:38:54,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 42 [2022-07-14 06:38:54,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:54,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:54,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:54,359 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-14 06:38:54,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2022-07-14 06:38:54,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:54,582 INFO L356 Elim1Store]: treesize reduction 100, result has 36.3 percent of original size [2022-07-14 06:38:54,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 41 treesize of output 82 [2022-07-14 06:38:54,905 INFO L390 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 [2022-07-14 06:38:54,924 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-14 06:38:54,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 38 [2022-07-14 06:38:55,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:55,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:55,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:55,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:55,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:55,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:55,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:55,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:55,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:55,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:55,522 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:38:55,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 61 [2022-07-14 06:38:55,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:55,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:55,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:55,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:55,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:55,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:55,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:55,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:55,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:55,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:55,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2022-07-14 06:38:56,102 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:38:56,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-14 06:38:56,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:38:56,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:56,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:56,135 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:38:56,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-07-14 06:38:56,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:56,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:56,364 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:38:56,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-07-14 06:38:56,475 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:38:56,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-14 06:38:56,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:38:56,691 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:38:56,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-14 06:38:56,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:38:56,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:56,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:56,721 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:38:56,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-07-14 06:38:57,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:57,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:57,069 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:38:57,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-07-14 06:38:57,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:38:57,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-14 06:38:57,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-07-14 06:38:59,326 INFO L356 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-07-14 06:38:59,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2022-07-14 06:39:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:39:01,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:39:01,131 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:39:01,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857659192] [2022-07-14 06:39:01,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857659192] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:39:01,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:39:01,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-14 06:39:01,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179761337] [2022-07-14 06:39:01,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:39:01,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-14 06:39:01,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:39:01,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-14 06:39:01,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2022-07-14 06:39:01,136 INFO L87 Difference]: Start difference. First operand 290 states and 339 transitions. Second operand has 24 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:39:02,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:39:02,340 INFO L93 Difference]: Finished difference Result 321 states and 381 transitions. [2022-07-14 06:39:02,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-14 06:39:02,341 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 48 [2022-07-14 06:39:02,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:39:02,342 INFO L225 Difference]: With dead ends: 321 [2022-07-14 06:39:02,342 INFO L226 Difference]: Without dead ends: 321 [2022-07-14 06:39:02,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2022-07-14 06:39:02,342 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 86 mSDsluCounter, 1600 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1745 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 943 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:39:02,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 1745 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 689 Invalid, 0 Unknown, 943 Unchecked, 0.7s Time] [2022-07-14 06:39:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-07-14 06:39:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 293. [2022-07-14 06:39:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 210 states have (on average 1.519047619047619) internal successors, (319), 271 states have internal predecessors, (319), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:39:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 344 transitions. [2022-07-14 06:39:02,350 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 344 transitions. Word has length 48 [2022-07-14 06:39:02,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:39:02,350 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 344 transitions. [2022-07-14 06:39:02,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:39:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 344 transitions. [2022-07-14 06:39:02,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-14 06:39:02,351 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:39:02,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:39:02,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-14 06:39:02,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:39:02,561 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:39:02,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:39:02,562 INFO L85 PathProgramCache]: Analyzing trace with hash 463879876, now seen corresponding path program 1 times [2022-07-14 06:39:02,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:39:02,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679367534] [2022-07-14 06:39:02,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:39:02,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:39:02,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:39:02,563 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:39:02,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-14 06:39:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:39:03,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-14 06:39:03,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:39:03,072 INFO L390 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 [2022-07-14 06:39:03,134 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-14 06:39:03,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 39 [2022-07-14 06:39:03,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2022-07-14 06:39:03,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:39:03,496 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-07-14 06:39:03,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2022-07-14 06:39:03,543 INFO L356 Elim1Store]: treesize reduction 57, result has 44.1 percent of original size [2022-07-14 06:39:03,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 66 [2022-07-14 06:39:03,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:03,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:03,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:03,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-07-14 06:39:03,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-14 06:39:03,885 INFO L356 Elim1Store]: treesize reduction 44, result has 32.3 percent of original size [2022-07-14 06:39:03,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 46 [2022-07-14 06:39:03,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 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 [2022-07-14 06:39:04,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-14 06:39:04,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 39 [2022-07-14 06:39:04,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,602 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:39:04,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 57 [2022-07-14 06:39:04,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,621 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:39:04,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 78 [2022-07-14 06:39:04,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:04,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-07-14 06:39:05,070 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:39:05,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 57 [2022-07-14 06:39:05,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:05,108 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:39:05,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-07-14 06:39:05,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-07-14 06:39:05,242 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:39:05,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 57 [2022-07-14 06:39:05,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-07-14 06:39:05,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:05,288 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:39:05,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-07-14 06:39:05,458 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-14 06:39:05,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2022-07-14 06:39:05,469 INFO L390 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 43 treesize of output 39 [2022-07-14 06:39:05,492 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:39:05,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 57 [2022-07-14 06:39:05,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:05,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:05,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-07-14 06:39:05,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-07-14 06:39:05,701 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:39:05,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 57 [2022-07-14 06:39:08,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 22 [2022-07-14 06:39:08,503 INFO L356 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-07-14 06:39:08,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 52 [2022-07-14 06:39:08,517 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 06:39:08,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-14 06:39:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:39:08,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:39:08,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:39:08,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679367534] [2022-07-14 06:39:08,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679367534] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:39:08,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:39:08,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-14 06:39:08,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845394819] [2022-07-14 06:39:08,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:39:08,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-14 06:39:08,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:39:08,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-14 06:39:08,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2022-07-14 06:39:08,761 INFO L87 Difference]: Start difference. First operand 293 states and 344 transitions. Second operand has 29 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:39:09,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:39:09,863 INFO L93 Difference]: Finished difference Result 332 states and 392 transitions. [2022-07-14 06:39:09,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-14 06:39:09,863 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 48 [2022-07-14 06:39:09,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:39:09,864 INFO L225 Difference]: With dead ends: 332 [2022-07-14 06:39:09,864 INFO L226 Difference]: Without dead ends: 332 [2022-07-14 06:39:09,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-07-14 06:39:09,865 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 68 mSDsluCounter, 1826 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1964 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1386 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:39:09,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 1964 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 414 Invalid, 0 Unknown, 1386 Unchecked, 0.4s Time] [2022-07-14 06:39:09,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-07-14 06:39:09,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 314. [2022-07-14 06:39:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 231 states have (on average 1.4848484848484849) internal successors, (343), 292 states have internal predecessors, (343), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:39:09,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 368 transitions. [2022-07-14 06:39:09,870 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 368 transitions. Word has length 48 [2022-07-14 06:39:09,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:39:09,870 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 368 transitions. [2022-07-14 06:39:09,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:39:09,870 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 368 transitions. [2022-07-14 06:39:09,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-14 06:39:09,871 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:39:09,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:39:09,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-14 06:39:10,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:39:10,082 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:39:10,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:39:10,082 INFO L85 PathProgramCache]: Analyzing trace with hash 245025158, now seen corresponding path program 1 times [2022-07-14 06:39:10,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:39:10,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415584660] [2022-07-14 06:39:10,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:39:10,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:39:10,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:39:10,084 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:39:10,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-14 06:39:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:39:10,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-14 06:39:10,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:39:10,635 INFO L390 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 [2022-07-14 06:39:10,704 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-14 06:39:10,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 39 [2022-07-14 06:39:10,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:39:10,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2022-07-14 06:39:11,044 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-07-14 06:39:11,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2022-07-14 06:39:11,085 INFO L356 Elim1Store]: treesize reduction 57, result has 44.1 percent of original size [2022-07-14 06:39:11,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 66 [2022-07-14 06:39:11,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-07-14 06:39:11,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-14 06:39:11,453 INFO L356 Elim1Store]: treesize reduction 44, result has 32.3 percent of original size [2022-07-14 06:39:11,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 46 [2022-07-14 06:39:11,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 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 [2022-07-14 06:39:11,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-14 06:39:11,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 39 [2022-07-14 06:39:11,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,955 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:39:11,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 57 [2022-07-14 06:39:11,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:11,975 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:39:11,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 78 [2022-07-14 06:39:12,183 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-14 06:39:12,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2022-07-14 06:39:12,211 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:39:12,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 57 [2022-07-14 06:39:12,316 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:39:12,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 57 [2022-07-14 06:39:12,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:12,347 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:39:12,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-07-14 06:39:12,481 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:39:12,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 57 [2022-07-14 06:39:12,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:12,512 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:39:12,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-07-14 06:39:12,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:12,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:12,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-07-14 06:39:12,660 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:39:12,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 57 [2022-07-14 06:39:15,187 INFO L356 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-07-14 06:39:15,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 52 [2022-07-14 06:39:15,202 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 06:39:15,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-14 06:39:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:39:15,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:39:15,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:39:15,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415584660] [2022-07-14 06:39:15,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415584660] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:39:15,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:39:15,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-07-14 06:39:15,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727605788] [2022-07-14 06:39:15,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:39:15,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-14 06:39:15,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:39:15,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-14 06:39:15,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2022-07-14 06:39:15,462 INFO L87 Difference]: Start difference. First operand 314 states and 368 transitions. Second operand has 26 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:39:16,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:39:16,695 INFO L93 Difference]: Finished difference Result 314 states and 367 transitions. [2022-07-14 06:39:16,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-14 06:39:16,695 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 48 [2022-07-14 06:39:16,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:39:16,696 INFO L225 Difference]: With dead ends: 314 [2022-07-14 06:39:16,696 INFO L226 Difference]: Without dead ends: 314 [2022-07-14 06:39:16,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 06:39:16,697 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 25 mSDsluCounter, 2060 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 2223 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 950 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:39:16,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 2223 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 565 Invalid, 0 Unknown, 950 Unchecked, 0.6s Time] [2022-07-14 06:39:16,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-07-14 06:39:16,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 293. [2022-07-14 06:39:16,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 210 states have (on average 1.5142857142857142) internal successors, (318), 271 states have internal predecessors, (318), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:39:16,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 343 transitions. [2022-07-14 06:39:16,702 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 343 transitions. Word has length 48 [2022-07-14 06:39:16,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:39:16,702 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 343 transitions. [2022-07-14 06:39:16,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:39:16,702 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 343 transitions. [2022-07-14 06:39:16,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-14 06:39:16,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:39:16,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:39:16,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-14 06:39:16,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:39:16,907 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:39:16,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:39:16,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2098722122, now seen corresponding path program 1 times [2022-07-14 06:39:16,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:39:16,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661840469] [2022-07-14 06:39:16,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:39:16,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:39:16,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:39:16,910 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:39:16,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-14 06:39:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:39:17,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 06:39:17,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:39:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:39:17,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:39:17,123 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:39:17,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661840469] [2022-07-14 06:39:17,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661840469] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:39:17,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:39:17,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:39:17,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032758830] [2022-07-14 06:39:17,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:39:17,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:39:17,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:39:17,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:39:17,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:39:17,124 INFO L87 Difference]: Start difference. First operand 293 states and 343 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:39:17,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:39:17,139 INFO L93 Difference]: Finished difference Result 312 states and 360 transitions. [2022-07-14 06:39:17,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:39:17,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-07-14 06:39:17,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:39:17,140 INFO L225 Difference]: With dead ends: 312 [2022-07-14 06:39:17,140 INFO L226 Difference]: Without dead ends: 312 [2022-07-14 06:39:17,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:39:17,140 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 77 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:39:17,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 560 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:39:17,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-07-14 06:39:17,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 291. [2022-07-14 06:39:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 208 states have (on average 1.5048076923076923) internal successors, (313), 269 states have internal predecessors, (313), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:39:17,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 338 transitions. [2022-07-14 06:39:17,144 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 338 transitions. Word has length 49 [2022-07-14 06:39:17,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:39:17,144 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 338 transitions. [2022-07-14 06:39:17,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:39:17,145 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 338 transitions. [2022-07-14 06:39:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 06:39:17,145 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:39:17,145 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:39:17,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-14 06:39:17,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:39:17,346 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:39:17,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:39:17,346 INFO L85 PathProgramCache]: Analyzing trace with hash -888034331, now seen corresponding path program 1 times [2022-07-14 06:39:17,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:39:17,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759572802] [2022-07-14 06:39:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:39:17,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:39:17,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:39:17,348 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:39:17,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-14 06:39:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:39:17,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 06:39:17,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:39:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:39:17,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:39:17,595 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:39:17,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759572802] [2022-07-14 06:39:17,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759572802] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:39:17,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:39:17,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:39:17,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958892487] [2022-07-14 06:39:17,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:39:17,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:39:17,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:39:17,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:39:17,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:39:17,596 INFO L87 Difference]: Start difference. First operand 291 states and 338 transitions. Second operand has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:39:18,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:39:18,155 INFO L93 Difference]: Finished difference Result 392 states and 452 transitions. [2022-07-14 06:39:18,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:39:18,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-14 06:39:18,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:39:18,157 INFO L225 Difference]: With dead ends: 392 [2022-07-14 06:39:18,157 INFO L226 Difference]: Without dead ends: 392 [2022-07-14 06:39:18,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:39:18,158 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 81 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:39:18,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 360 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-14 06:39:18,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-07-14 06:39:18,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 290. [2022-07-14 06:39:18,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 208 states have (on average 1.4951923076923077) internal successors, (311), 268 states have internal predecessors, (311), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:39:18,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 336 transitions. [2022-07-14 06:39:18,165 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 336 transitions. Word has length 50 [2022-07-14 06:39:18,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:39:18,165 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 336 transitions. [2022-07-14 06:39:18,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:39:18,165 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 336 transitions. [2022-07-14 06:39:18,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 06:39:18,166 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:39:18,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:39:18,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-07-14 06:39:18,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:39:18,375 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:39:18,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:39:18,375 INFO L85 PathProgramCache]: Analyzing trace with hash -888034332, now seen corresponding path program 1 times [2022-07-14 06:39:18,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:39:18,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152815377] [2022-07-14 06:39:18,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:39:18,376 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:39:18,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:39:18,377 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:39:18,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-14 06:39:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:39:18,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 06:39:18,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:39:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:39:18,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:39:18,577 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:39:18,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152815377] [2022-07-14 06:39:18,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152815377] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:39:18,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:39:18,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:39:18,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298490948] [2022-07-14 06:39:18,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:39:18,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:39:18,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:39:18,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:39:18,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:39:18,578 INFO L87 Difference]: Start difference. First operand 290 states and 336 transitions. Second operand has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:39:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:39:18,745 INFO L93 Difference]: Finished difference Result 349 states and 405 transitions. [2022-07-14 06:39:18,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:39:18,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-14 06:39:18,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:39:18,747 INFO L225 Difference]: With dead ends: 349 [2022-07-14 06:39:18,747 INFO L226 Difference]: Without dead ends: 349 [2022-07-14 06:39:18,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:39:18,747 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 43 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:39:18,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 325 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:39:18,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-07-14 06:39:18,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 289. [2022-07-14 06:39:18,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 267 states have internal predecessors, (309), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:39:18,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 334 transitions. [2022-07-14 06:39:18,751 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 334 transitions. Word has length 50 [2022-07-14 06:39:18,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:39:18,751 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 334 transitions. [2022-07-14 06:39:18,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:39:18,752 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 334 transitions. [2022-07-14 06:39:18,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-14 06:39:18,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:39:18,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:39:18,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-07-14 06:39:18,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:39:18,961 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ldv_list_delErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:39:18,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:39:18,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2119273512, now seen corresponding path program 1 times [2022-07-14 06:39:18,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:39:18,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57813298] [2022-07-14 06:39:18,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:39:18,962 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:39:18,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:39:18,963 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:39:18,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-14 06:39:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:39:19,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:39:19,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:39:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:39:19,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:39:19,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:39:19,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57813298] [2022-07-14 06:39:19,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57813298] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:39:19,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:39:19,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:39:19,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331823707] [2022-07-14 06:39:19,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:39:19,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:39:19,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:39:19,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:39:19,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:39:19,154 INFO L87 Difference]: Start difference. First operand 289 states and 334 transitions. Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:39:19,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:39:19,435 INFO L93 Difference]: Finished difference Result 325 states and 378 transitions. [2022-07-14 06:39:19,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:39:19,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-07-14 06:39:19,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:39:19,436 INFO L225 Difference]: With dead ends: 325 [2022-07-14 06:39:19,436 INFO L226 Difference]: Without dead ends: 325 [2022-07-14 06:39:19,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:39:19,436 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 44 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:39:19,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 512 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:39:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-07-14 06:39:19,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 315. [2022-07-14 06:39:19,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 231 states have (on average 1.5021645021645023) internal successors, (347), 289 states have internal predecessors, (347), 13 states have call successors, (13), 12 states have call predecessors, (13), 13 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-07-14 06:39:19,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 376 transitions. [2022-07-14 06:39:19,441 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 376 transitions. Word has length 52 [2022-07-14 06:39:19,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:39:19,441 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 376 transitions. [2022-07-14 06:39:19,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:39:19,442 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 376 transitions. [2022-07-14 06:39:19,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-14 06:39:19,442 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:39:19,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:39:19,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-14 06:39:19,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:39:19,650 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ldv_list_delErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:39:19,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:39:19,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2119273511, now seen corresponding path program 1 times [2022-07-14 06:39:19,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:39:19,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758816144] [2022-07-14 06:39:19,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:39:19,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:39:19,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:39:19,652 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:39:19,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-14 06:39:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:39:19,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-14 06:39:19,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:39:19,990 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:39:19,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-14 06:39:20,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:39:20,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:39:20,245 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-14 06:39:20,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-14 06:39:20,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:20,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-14 06:39:20,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-14 06:39:20,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-14 06:39:20,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:20,490 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:39:20,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2022-07-14 06:39:20,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-07-14 06:39:20,877 INFO L356 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-07-14 06:39:20,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2022-07-14 06:39:21,120 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:39:21,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 54 [2022-07-14 06:39:21,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2022-07-14 06:39:21,224 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:39:21,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 54 [2022-07-14 06:39:21,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2022-07-14 06:39:21,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:21,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:39:21,977 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 06:39:21,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 34 [2022-07-14 06:39:21,986 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-07-14 06:39:21,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 16 [2022-07-14 06:39:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:39:22,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:39:22,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:39:22,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758816144] [2022-07-14 06:39:22,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758816144] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:39:22,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:39:22,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-07-14 06:39:22,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914698765] [2022-07-14 06:39:22,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:39:22,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-14 06:39:22,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:39:22,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-14 06:39:22,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-07-14 06:39:22,207 INFO L87 Difference]: Start difference. First operand 315 states and 376 transitions. Second operand has 27 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 20 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:39:23,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:39:23,095 INFO L93 Difference]: Finished difference Result 285 states and 324 transitions. [2022-07-14 06:39:23,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-14 06:39:23,096 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 20 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2022-07-14 06:39:23,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:39:23,097 INFO L225 Difference]: With dead ends: 285 [2022-07-14 06:39:23,097 INFO L226 Difference]: Without dead ends: 285 [2022-07-14 06:39:23,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-07-14 06:39:23,097 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 10 mSDsluCounter, 2120 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2286 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 560 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:39:23,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 2286 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 402 Invalid, 0 Unknown, 560 Unchecked, 0.5s Time] [2022-07-14 06:39:23,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-07-14 06:39:23,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-07-14 06:39:23,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 205 states have (on average 1.4585365853658536) internal successors, (299), 263 states have internal predecessors, (299), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:39:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 324 transitions. [2022-07-14 06:39:23,102 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 324 transitions. Word has length 52 [2022-07-14 06:39:23,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:39:23,102 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 324 transitions. [2022-07-14 06:39:23,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 20 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:39:23,102 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 324 transitions. [2022-07-14 06:39:23,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-14 06:39:23,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:39:23,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:39:23,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-14 06:39:23,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:39:23,312 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:39:23,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:39:23,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1760156012, now seen corresponding path program 1 times [2022-07-14 06:39:23,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:39:23,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628533131] [2022-07-14 06:39:23,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:39:23,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:39:23,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:39:23,314 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:39:23,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-14 06:39:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:39:23,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:39:23,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:39:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:39:23,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:39:23,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:39:23,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628533131] [2022-07-14 06:39:23,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628533131] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:39:23,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:39:23,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:39:23,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100743609] [2022-07-14 06:39:23,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:39:23,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:39:23,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:39:23,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:39:23,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:39:23,536 INFO L87 Difference]: Start difference. First operand 285 states and 324 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:39:23,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:39:23,567 INFO L93 Difference]: Finished difference Result 362 states and 405 transitions. [2022-07-14 06:39:23,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:39:23,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-07-14 06:39:23,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:39:23,568 INFO L225 Difference]: With dead ends: 362 [2022-07-14 06:39:23,568 INFO L226 Difference]: Without dead ends: 362 [2022-07-14 06:39:23,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:39:23,569 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 95 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:39:23,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 826 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:39:23,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-07-14 06:39:23,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 291. [2022-07-14 06:39:23,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 211 states have (on average 1.4454976303317535) internal successors, (305), 269 states have internal predecessors, (305), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:39:23,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 330 transitions. [2022-07-14 06:39:23,573 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 330 transitions. Word has length 51 [2022-07-14 06:39:23,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:39:23,573 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 330 transitions. [2022-07-14 06:39:23,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:39:23,573 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 330 transitions. [2022-07-14 06:39:23,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-14 06:39:23,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:39:23,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:39:23,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-14 06:39:23,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:39:23,783 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:39:23,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:39:23,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1281723238, now seen corresponding path program 1 times [2022-07-14 06:39:23,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:39:23,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667065343] [2022-07-14 06:39:23,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:39:23,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:39:23,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:39:23,784 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:39:23,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-14 06:39:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:39:23,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:39:23,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:39:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:39:23,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:39:23,979 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:39:23,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667065343] [2022-07-14 06:39:23,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667065343] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:39:23,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:39:23,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:39:23,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854181796] [2022-07-14 06:39:23,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:39:23,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:39:23,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:39:23,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:39:23,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:39:23,980 INFO L87 Difference]: Start difference. First operand 291 states and 330 transitions. Second operand has 4 states, 3 states have (on average 15.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:39:24,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:39:24,209 INFO L93 Difference]: Finished difference Result 296 states and 332 transitions. [2022-07-14 06:39:24,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:39:24,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 15.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-07-14 06:39:24,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:39:24,211 INFO L225 Difference]: With dead ends: 296 [2022-07-14 06:39:24,211 INFO L226 Difference]: Without dead ends: 296 [2022-07-14 06:39:24,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:39:24,211 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 50 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:39:24,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 347 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:39:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-07-14 06:39:24,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 293. [2022-07-14 06:39:24,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 213 states have (on average 1.4413145539906103) internal successors, (307), 270 states have internal predecessors, (307), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:39:24,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 332 transitions. [2022-07-14 06:39:24,215 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 332 transitions. Word has length 53 [2022-07-14 06:39:24,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:39:24,215 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 332 transitions. [2022-07-14 06:39:24,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 15.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:39:24,215 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 332 transitions. [2022-07-14 06:39:24,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-14 06:39:24,215 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:39:24,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:39:24,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-07-14 06:39:24,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:39:24,424 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:39:24,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:39:24,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1078714490, now seen corresponding path program 1 times [2022-07-14 06:39:24,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:39:24,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972925948] [2022-07-14 06:39:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:39:24,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:39:24,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:39:24,426 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:39:24,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-14 06:39:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:39:24,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-14 06:39:24,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:39:24,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:39:24,876 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-14 06:39:24,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-07-14 06:39:24,925 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:39:24,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 49 [2022-07-14 06:39:25,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:39:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:39:25,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:39:25,034 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:39:25,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972925948] [2022-07-14 06:39:25,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972925948] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:39:25,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:39:25,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-14 06:39:25,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655949763] [2022-07-14 06:39:25,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:39:25,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-14 06:39:25,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:39:25,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-14 06:39:25,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:39:25,035 INFO L87 Difference]: Start difference. First operand 293 states and 332 transitions. Second operand has 18 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:39:26,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:39:26,246 INFO L93 Difference]: Finished difference Result 302 states and 340 transitions. [2022-07-14 06:39:26,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-14 06:39:26,246 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 54 [2022-07-14 06:39:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:39:26,247 INFO L225 Difference]: With dead ends: 302 [2022-07-14 06:39:26,247 INFO L226 Difference]: Without dead ends: 302 [2022-07-14 06:39:26,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2022-07-14 06:39:26,248 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 347 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-14 06:39:26,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 1765 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-14 06:39:26,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-07-14 06:39:26,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 293. [2022-07-14 06:39:26,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 214 states have (on average 1.4345794392523366) internal successors, (307), 270 states have internal predecessors, (307), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:39:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 332 transitions. [2022-07-14 06:39:26,252 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 332 transitions. Word has length 54 [2022-07-14 06:39:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:39:26,252 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 332 transitions. [2022-07-14 06:39:26,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:39:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 332 transitions. [2022-07-14 06:39:26,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-14 06:39:26,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:39:26,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:39:26,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-14 06:39:26,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:39:26,462 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:39:26,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:39:26,463 INFO L85 PathProgramCache]: Analyzing trace with hash 919589466, now seen corresponding path program 1 times [2022-07-14 06:39:26,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:39:26,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370799578] [2022-07-14 06:39:26,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:39:26,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:39:26,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:39:26,464 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:39:26,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-14 06:39:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:39:26,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-14 06:39:26,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:39:26,793 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:39:26,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-14 06:39:26,980 INFO L390 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 [2022-07-14 06:39:27,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:27,032 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-14 06:39:27,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 31 [2022-07-14 06:39:27,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-07-14 06:39:27,297 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-14 06:39:27,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2022-07-14 06:39:27,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2022-07-14 06:39:27,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 53 [2022-07-14 06:39:28,055 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:39:28,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 18 [2022-07-14 06:39:28,308 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:39:28,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 21 [2022-07-14 06:39:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:39:28,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:39:28,396 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:39:28,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370799578] [2022-07-14 06:39:28,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370799578] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:39:28,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:39:28,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-14 06:39:28,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65147190] [2022-07-14 06:39:28,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:39:28,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-14 06:39:28,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:39:28,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 06:39:28,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:39:28,397 INFO L87 Difference]: Start difference. First operand 293 states and 332 transitions. Second operand has 21 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:39:30,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:39:30,501 INFO L93 Difference]: Finished difference Result 328 states and 363 transitions. [2022-07-14 06:39:30,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:39:30,502 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 55 [2022-07-14 06:39:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:39:30,503 INFO L225 Difference]: With dead ends: 328 [2022-07-14 06:39:30,503 INFO L226 Difference]: Without dead ends: 328 [2022-07-14 06:39:30,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2022-07-14 06:39:30,503 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 216 mSDsluCounter, 1465 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 585 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:39:30,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 1589 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1163 Invalid, 0 Unknown, 585 Unchecked, 1.4s Time] [2022-07-14 06:39:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-07-14 06:39:30,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 294. [2022-07-14 06:39:30,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 215 states have (on average 1.4325581395348836) internal successors, (308), 271 states have internal predecessors, (308), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:39:30,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 333 transitions. [2022-07-14 06:39:30,507 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 333 transitions. Word has length 55 [2022-07-14 06:39:30,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:39:30,507 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 333 transitions. [2022-07-14 06:39:30,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:39:30,507 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 333 transitions. [2022-07-14 06:39:30,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-14 06:39:30,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:39:30,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:39:30,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-07-14 06:39:30,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:39:30,717 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:39:30,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:39:30,717 INFO L85 PathProgramCache]: Analyzing trace with hash -776401890, now seen corresponding path program 1 times [2022-07-14 06:39:30,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:39:30,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078707601] [2022-07-14 06:39:30,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:39:30,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:39:30,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:39:30,718 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:39:30,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-14 06:39:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:39:31,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-14 06:39:31,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:39:31,077 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:39:31,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-14 06:39:31,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:31,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:31,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 24 [2022-07-14 06:39:31,259 INFO L356 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2022-07-14 06:39:31,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 30 [2022-07-14 06:39:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:39:31,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:39:31,401 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:39:31,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078707601] [2022-07-14 06:39:31,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078707601] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:39:31,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:39:31,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-14 06:39:31,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670086179] [2022-07-14 06:39:31,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:39:31,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 06:39:31,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:39:31,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 06:39:31,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:39:31,402 INFO L87 Difference]: Start difference. First operand 294 states and 333 transitions. Second operand has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:39:31,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:39:31,958 INFO L93 Difference]: Finished difference Result 304 states and 340 transitions. [2022-07-14 06:39:31,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 06:39:31,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 55 [2022-07-14 06:39:31,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:39:31,959 INFO L225 Difference]: With dead ends: 304 [2022-07-14 06:39:31,959 INFO L226 Difference]: Without dead ends: 304 [2022-07-14 06:39:31,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:39:31,959 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 96 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:39:31,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 835 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 544 Invalid, 0 Unknown, 235 Unchecked, 0.5s Time] [2022-07-14 06:39:31,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-07-14 06:39:31,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 293. [2022-07-14 06:39:31,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 215 states have (on average 1.4232558139534883) internal successors, (306), 270 states have internal predecessors, (306), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:39:31,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 331 transitions. [2022-07-14 06:39:31,963 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 331 transitions. Word has length 55 [2022-07-14 06:39:31,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:39:31,963 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 331 transitions. [2022-07-14 06:39:31,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:39:31,963 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 331 transitions. [2022-07-14 06:39:31,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-14 06:39:31,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:39:31,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:39:31,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-07-14 06:39:32,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:39:32,164 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:39:32,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:39:32,165 INFO L85 PathProgramCache]: Analyzing trace with hash -776401889, now seen corresponding path program 1 times [2022-07-14 06:39:32,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:39:32,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042091366] [2022-07-14 06:39:32,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:39:32,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:39:32,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:39:32,166 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:39:32,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-14 06:39:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:39:32,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-14 06:39:32,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:39:32,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:32,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-14 06:39:32,645 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-14 06:39:32,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:39:32,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:32,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:39:32,872 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:39:32,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:39:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:39:33,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:39:33,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:39:33,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042091366] [2022-07-14 06:39:33,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042091366] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:39:33,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:39:33,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-14 06:39:33,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545739865] [2022-07-14 06:39:33,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:39:33,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 06:39:33,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:39:33,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 06:39:33,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:39:33,022 INFO L87 Difference]: Start difference. First operand 293 states and 331 transitions. Second operand has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:39:33,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:39:33,760 INFO L93 Difference]: Finished difference Result 294 states and 329 transitions. [2022-07-14 06:39:33,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 06:39:33,761 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 55 [2022-07-14 06:39:33,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:39:33,762 INFO L225 Difference]: With dead ends: 294 [2022-07-14 06:39:33,762 INFO L226 Difference]: Without dead ends: 294 [2022-07-14 06:39:33,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:39:33,762 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 183 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:39:33,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 762 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 650 Invalid, 0 Unknown, 237 Unchecked, 0.7s Time] [2022-07-14 06:39:33,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-07-14 06:39:33,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 292. [2022-07-14 06:39:33,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 215 states have (on average 1.413953488372093) internal successors, (304), 269 states have internal predecessors, (304), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:39:33,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 329 transitions. [2022-07-14 06:39:33,766 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 329 transitions. Word has length 55 [2022-07-14 06:39:33,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:39:33,766 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 329 transitions. [2022-07-14 06:39:33,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:39:33,766 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 329 transitions. [2022-07-14 06:39:33,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-14 06:39:33,767 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:39:33,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:39:33,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-07-14 06:39:33,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:39:33,978 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:39:33,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:39:33,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1557497336, now seen corresponding path program 1 times [2022-07-14 06:39:33,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:39:33,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788105169] [2022-07-14 06:39:33,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:39:33,978 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:39:33,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:39:33,980 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:39:33,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-07-14 06:39:34,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:39:34,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 06:39:34,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:39:34,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-14 06:39:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:39:34,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:39:34,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:39:34,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788105169] [2022-07-14 06:39:34,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788105169] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:39:34,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:39:34,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 06:39:34,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947730341] [2022-07-14 06:39:34,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:39:34,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:39:34,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:39:34,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:39:34,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:39:34,245 INFO L87 Difference]: Start difference. First operand 292 states and 329 transitions. Second operand has 8 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:39:34,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:39:34,708 INFO L93 Difference]: Finished difference Result 298 states and 334 transitions. [2022-07-14 06:39:34,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:39:34,708 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2022-07-14 06:39:34,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:39:34,709 INFO L225 Difference]: With dead ends: 298 [2022-07-14 06:39:34,709 INFO L226 Difference]: Without dead ends: 298 [2022-07-14 06:39:34,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:39:34,709 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 42 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:39:34,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 853 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:39:34,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-07-14 06:39:34,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 295. [2022-07-14 06:39:34,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 218 states have (on average 1.4174311926605505) internal successors, (309), 272 states have internal predecessors, (309), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:39:34,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 334 transitions. [2022-07-14 06:39:34,713 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 334 transitions. Word has length 56 [2022-07-14 06:39:34,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:39:34,713 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 334 transitions. [2022-07-14 06:39:34,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:39:34,714 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 334 transitions. [2022-07-14 06:39:34,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-14 06:39:34,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:39:34,714 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:39:34,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-07-14 06:39:34,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:39:34,918 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:39:34,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:39:34,919 INFO L85 PathProgramCache]: Analyzing trace with hash 201724655, now seen corresponding path program 1 times [2022-07-14 06:39:34,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:39:34,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013107256] [2022-07-14 06:39:34,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:39:34,919 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:39:34,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:39:34,920 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:39:34,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-07-14 06:39:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:39:35,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 06:39:35,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:39:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 06:39:35,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:39:35,475 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:39:35,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013107256] [2022-07-14 06:39:35,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013107256] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:39:35,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:39:35,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:39:35,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257182079] [2022-07-14 06:39:35,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:39:35,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:39:35,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:39:35,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:39:35,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:39:35,476 INFO L87 Difference]: Start difference. First operand 295 states and 334 transitions. Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:39:35,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:39:35,490 INFO L93 Difference]: Finished difference Result 337 states and 377 transitions. [2022-07-14 06:39:35,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:39:35,491 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-07-14 06:39:35,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:39:35,492 INFO L225 Difference]: With dead ends: 337 [2022-07-14 06:39:35,492 INFO L226 Difference]: Without dead ends: 337 [2022-07-14 06:39:35,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:39:35,492 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 162 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:39:35,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 737 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 81 Unchecked, 0.0s Time] [2022-07-14 06:39:35,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-07-14 06:39:35,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 294. [2022-07-14 06:39:35,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 218 states have (on average 1.408256880733945) internal successors, (307), 271 states have internal predecessors, (307), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:39:35,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 332 transitions. [2022-07-14 06:39:35,495 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 332 transitions. Word has length 56 [2022-07-14 06:39:35,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:39:35,495 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 332 transitions. [2022-07-14 06:39:35,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:39:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 332 transitions. [2022-07-14 06:39:35,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:39:35,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:39:35,496 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:39:35,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-07-14 06:39:35,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:39:35,703 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:39:35,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:39:35,704 INFO L85 PathProgramCache]: Analyzing trace with hash 477520901, now seen corresponding path program 1 times [2022-07-14 06:39:35,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:39:35,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087419528] [2022-07-14 06:39:35,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:39:35,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:39:35,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:39:35,706 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:39:35,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-07-14 06:39:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:39:36,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:39:36,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:39:36,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:39:36,110 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:39:36,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-14 06:39:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:39:36,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:39:36,116 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:39:36,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087419528] [2022-07-14 06:39:36,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087419528] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:39:36,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:39:36,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:39:36,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554974637] [2022-07-14 06:39:36,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:39:36,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:39:36,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:39:36,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:39:36,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:39:36,117 INFO L87 Difference]: Start difference. First operand 294 states and 332 transitions. Second operand has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:39:36,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:39:36,387 INFO L93 Difference]: Finished difference Result 354 states and 392 transitions. [2022-07-14 06:39:36,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:39:36,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-07-14 06:39:36,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:39:36,388 INFO L225 Difference]: With dead ends: 354 [2022-07-14 06:39:36,388 INFO L226 Difference]: Without dead ends: 354 [2022-07-14 06:39:36,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:39:36,388 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 99 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:39:36,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 447 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 186 Invalid, 0 Unknown, 103 Unchecked, 0.3s Time] [2022-07-14 06:39:36,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-07-14 06:39:36,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 293. [2022-07-14 06:39:36,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 218 states have (on average 1.4036697247706422) internal successors, (306), 270 states have internal predecessors, (306), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:39:36,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 331 transitions. [2022-07-14 06:39:36,392 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 331 transitions. Word has length 57 [2022-07-14 06:39:36,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:39:36,392 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 331 transitions. [2022-07-14 06:39:36,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:39:36,392 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 331 transitions. [2022-07-14 06:39:36,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:39:36,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:39:36,393 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:39:36,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-07-14 06:39:36,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:39:36,599 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:39:36,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:39:36,600 INFO L85 PathProgramCache]: Analyzing trace with hash 477520902, now seen corresponding path program 1 times [2022-07-14 06:39:36,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:39:36,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848677177] [2022-07-14 06:39:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:39:36,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:39:36,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:39:36,601 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:39:36,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-07-14 06:39:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:39:36,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:39:36,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:39:37,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:39:37,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:39:37,123 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:39:37,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-14 06:39:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:39:37,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:39:37,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:39:37,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848677177] [2022-07-14 06:39:37,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848677177] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:39:37,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:39:37,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:39:37,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26347284] [2022-07-14 06:39:37,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:39:37,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:39:37,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:39:37,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:39:37,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:39:37,214 INFO L87 Difference]: Start difference. First operand 293 states and 331 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:39:38,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:39:38,083 INFO L93 Difference]: Finished difference Result 409 states and 452 transitions. [2022-07-14 06:39:38,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:39:38,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-07-14 06:39:38,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:39:38,084 INFO L225 Difference]: With dead ends: 409 [2022-07-14 06:39:38,084 INFO L226 Difference]: Without dead ends: 409 [2022-07-14 06:39:38,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:39:38,085 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 201 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-14 06:39:38,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 465 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 288 Invalid, 0 Unknown, 141 Unchecked, 0.9s Time] [2022-07-14 06:39:38,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-07-14 06:39:38,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 292. [2022-07-14 06:39:38,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 218 states have (on average 1.3990825688073394) internal successors, (305), 269 states have internal predecessors, (305), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-14 06:39:38,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2022-07-14 06:39:38,088 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 57 [2022-07-14 06:39:38,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:39:38,089 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2022-07-14 06:39:38,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:39:38,089 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2022-07-14 06:39:38,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-14 06:39:38,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:39:38,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:39:38,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-07-14 06:39:38,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:39:38,300 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-07-14 06:39:38,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:39:38,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1389571934, now seen corresponding path program 1 times [2022-07-14 06:39:38,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:39:38,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873588952] [2022-07-14 06:39:38,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:39:38,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:39:38,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:39:38,302 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:39:38,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-07-14 06:39:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:39:38,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-14 06:39:38,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:39:38,773 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:39:38,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-14 06:39:38,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:39:38,998 INFO L356 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2022-07-14 06:39:38,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 49 [2022-07-14 06:39:39,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-07-14 06:39:39,225 INFO L356 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2022-07-14 06:39:39,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 37 [2022-07-14 06:39:39,472 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:39:39,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-07-14 06:39:39,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-07-14 06:39:40,397 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:39:40,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 67 [2022-07-14 06:39:40,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:39:40,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873588952] [2022-07-14 06:39:40,408 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-14 06:39:40,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-07-14 06:39:40,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:39:40,618 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Should have been eliminated by DER at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:113) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:353) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:164) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:152) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:764) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:725) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:643) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:335) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:176) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:251) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-14 06:39:40,620 INFO L158 Benchmark]: Toolchain (without parser) took 89306.85ms. Allocated memory was 56.6MB in the beginning and 136.3MB in the end (delta: 79.7MB). Free memory was 32.7MB in the beginning and 82.8MB in the end (delta: -50.1MB). Peak memory consumption was 28.9MB. Max. memory is 16.1GB. [2022-07-14 06:39:40,620 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 56.6MB. Free memory was 38.1MB in the beginning and 38.1MB in the end (delta: 29.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:39:40,621 INFO L158 Benchmark]: CACSL2BoogieTranslator took 525.27ms. Allocated memory was 56.6MB in the beginning and 77.6MB in the end (delta: 21.0MB). Free memory was 32.6MB in the beginning and 53.3MB in the end (delta: -20.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-14 06:39:40,621 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.80ms. Allocated memory is still 77.6MB. Free memory was 53.3MB in the beginning and 50.3MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 06:39:40,621 INFO L158 Benchmark]: Boogie Preprocessor took 63.56ms. Allocated memory is still 77.6MB. Free memory was 50.1MB in the beginning and 47.3MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-14 06:39:40,621 INFO L158 Benchmark]: RCFGBuilder took 693.05ms. Allocated memory is still 77.6MB. Free memory was 47.3MB in the beginning and 36.6MB in the end (delta: 10.8MB). Peak memory consumption was 13.5MB. Max. memory is 16.1GB. [2022-07-14 06:39:40,621 INFO L158 Benchmark]: TraceAbstraction took 87956.53ms. Allocated memory was 77.6MB in the beginning and 136.3MB in the end (delta: 58.7MB). Free memory was 36.1MB in the beginning and 82.8MB in the end (delta: -46.7MB). Peak memory consumption was 11.2MB. Max. memory is 16.1GB. [2022-07-14 06:39:40,621 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 56.6MB. Free memory was 38.1MB in the beginning and 38.1MB in the end (delta: 29.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 525.27ms. Allocated memory was 56.6MB in the beginning and 77.6MB in the end (delta: 21.0MB). Free memory was 32.6MB in the beginning and 53.3MB in the end (delta: -20.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.80ms. Allocated memory is still 77.6MB. Free memory was 53.3MB in the beginning and 50.3MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 63.56ms. Allocated memory is still 77.6MB. Free memory was 50.1MB in the beginning and 47.3MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 693.05ms. Allocated memory is still 77.6MB. Free memory was 47.3MB in the beginning and 36.6MB in the end (delta: 10.8MB). Peak memory consumption was 13.5MB. Max. memory is 16.1GB. * TraceAbstraction took 87956.53ms. Allocated memory was 77.6MB in the beginning and 136.3MB in the end (delta: 58.7MB). Free memory was 36.1MB in the beginning and 82.8MB in the end (delta: -46.7MB). Peak memory consumption was 11.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Should have been eliminated by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Should have been eliminated by DER: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:113) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-14 06:39:40,655 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: ERROR: ExceptionOrErrorResult: AssertionError: Should have been eliminated by DER