./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test6_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 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_test6_2.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 7f731faf9d41ed60f5858e3dbd50ffba002d2a56a92297f4715b69207f896c11 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 06:16:02,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 06:16:02,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 06:16:02,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 06:16:02,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 06:16:02,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 06:16:02,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 06:16:02,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 06:16:02,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 06:16:02,765 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 06:16:02,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 06:16:02,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 06:16:02,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 06:16:02,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 06:16:02,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 06:16:02,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 06:16:02,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 06:16:02,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 06:16:02,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 06:16:02,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 06:16:02,774 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 06:16:02,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 06:16:02,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 06:16:02,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 06:16:02,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 06:16:02,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 06:16:02,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 06:16:02,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 06:16:02,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 06:16:02,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 06:16:02,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 06:16:02,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 06:16:02,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 06:16:02,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 06:16:02,783 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 06:16:02,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 06:16:02,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 06:16:02,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 06:16:02,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 06:16:02,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 06:16:02,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 06:16:02,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 06:16:02,789 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 06:16:02,817 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 06:16:02,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 06:16:02,818 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 06:16:02,818 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 06:16:02,819 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 06:16:02,819 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 06:16:02,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 06:16:02,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 06:16:02,820 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 06:16:02,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 06:16:02,821 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 06:16:02,821 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 06:16:02,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 06:16:02,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 06:16:02,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 06:16:02,821 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 06:16:02,821 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 06:16:02,822 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 06:16:02,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 06:16:02,822 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 06:16:02,822 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 06:16:02,822 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 06:16:02,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 06:16:02,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 06:16:02,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 06:16:02,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:16:02,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 06:16:02,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 06:16:02,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 06:16:02,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 06:16:02,824 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f731faf9d41ed60f5858e3dbd50ffba002d2a56a92297f4715b69207f896c11 [2022-07-23 06:16:03,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 06:16:03,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 06:16:03,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 06:16:03,062 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 06:16:03,063 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 06:16:03,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test6_2.i [2022-07-23 06:16:03,137 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83be09ed0/b083032e31ce41a6b1bf4cdaf325bd22/FLAGedab5ee38 [2022-07-23 06:16:03,563 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 06:16:03,564 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test6_2.i [2022-07-23 06:16:03,576 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83be09ed0/b083032e31ce41a6b1bf4cdaf325bd22/FLAGedab5ee38 [2022-07-23 06:16:03,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83be09ed0/b083032e31ce41a6b1bf4cdaf325bd22 [2022-07-23 06:16:03,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 06:16:03,922 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 06:16:03,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 06:16:03,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 06:16:03,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 06:16:03,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:16:03" (1/1) ... [2022-07-23 06:16:03,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10c89578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:03, skipping insertion in model container [2022-07-23 06:16:03,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:16:03" (1/1) ... [2022-07-23 06:16:03,934 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 06:16:03,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:16:04,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:16:04,356 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) [2022-07-23 06:16:04,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@e54c6ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:04, skipping insertion in model container [2022-07-23 06:16:04,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 06:16:04,358 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-23 06:16:04,359 INFO L158 Benchmark]: Toolchain (without parser) took 436.68ms. Allocated memory was 77.6MB in the beginning and 102.8MB in the end (delta: 25.2MB). Free memory was 42.3MB in the beginning and 75.0MB in the end (delta: -32.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-23 06:16:04,360 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 77.6MB. Free memory was 56.8MB in the beginning and 56.7MB in the end (delta: 24.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 06:16:04,361 INFO L158 Benchmark]: CACSL2BoogieTranslator took 433.08ms. Allocated memory was 77.6MB in the beginning and 102.8MB in the end (delta: 25.2MB). Free memory was 42.1MB in the beginning and 75.0MB in the end (delta: -32.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-23 06:16:04,363 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 77.6MB. Free memory was 56.8MB in the beginning and 56.7MB in the end (delta: 24.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 433.08ms. Allocated memory was 77.6MB in the beginning and 102.8MB in the end (delta: 25.2MB). Free memory was 42.1MB in the beginning and 75.0MB in the end (delta: -32.8MB). Peak memory consumption was 4.2MB. 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_test6_2.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 7f731faf9d41ed60f5858e3dbd50ffba002d2a56a92297f4715b69207f896c11 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 06:16:06,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 06:16:06,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 06:16:06,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 06:16:06,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 06:16:06,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 06:16:06,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 06:16:06,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 06:16:06,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 06:16:06,086 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 06:16:06,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 06:16:06,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 06:16:06,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 06:16:06,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 06:16:06,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 06:16:06,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 06:16:06,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 06:16:06,097 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 06:16:06,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 06:16:06,102 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 06:16:06,103 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 06:16:06,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 06:16:06,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 06:16:06,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 06:16:06,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 06:16:06,111 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 06:16:06,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 06:16:06,112 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 06:16:06,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 06:16:06,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 06:16:06,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 06:16:06,114 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 06:16:06,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 06:16:06,115 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 06:16:06,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 06:16:06,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 06:16:06,117 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 06:16:06,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 06:16:06,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 06:16:06,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 06:16:06,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 06:16:06,119 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 06:16:06,126 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-23 06:16:06,150 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 06:16:06,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 06:16:06,150 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 06:16:06,151 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 06:16:06,151 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 06:16:06,151 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 06:16:06,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 06:16:06,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 06:16:06,152 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 06:16:06,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 06:16:06,153 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 06:16:06,153 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 06:16:06,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 06:16:06,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 06:16:06,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 06:16:06,164 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 06:16:06,165 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 06:16:06,165 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 06:16:06,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 06:16:06,165 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 06:16:06,165 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-23 06:16:06,165 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-23 06:16:06,166 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 06:16:06,166 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 06:16:06,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 06:16:06,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 06:16:06,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 06:16:06,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:16:06,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 06:16:06,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 06:16:06,167 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-23 06:16:06,167 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-23 06:16:06,167 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-23 06:16:06,168 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f731faf9d41ed60f5858e3dbd50ffba002d2a56a92297f4715b69207f896c11 [2022-07-23 06:16:06,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 06:16:06,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 06:16:06,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 06:16:06,477 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 06:16:06,477 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 06:16:06,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test6_2.i [2022-07-23 06:16:06,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e40d531cc/160af12da8c149d9b06a07c2ded7c5c3/FLAGa5f354394 [2022-07-23 06:16:06,925 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 06:16:06,926 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test6_2.i [2022-07-23 06:16:06,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e40d531cc/160af12da8c149d9b06a07c2ded7c5c3/FLAGa5f354394 [2022-07-23 06:16:07,271 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e40d531cc/160af12da8c149d9b06a07c2ded7c5c3 [2022-07-23 06:16:07,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 06:16:07,274 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 06:16:07,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 06:16:07,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 06:16:07,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 06:16:07,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:16:07" (1/1) ... [2022-07-23 06:16:07,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16c71ef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:07, skipping insertion in model container [2022-07-23 06:16:07,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:16:07" (1/1) ... [2022-07-23 06:16:07,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 06:16:07,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:16:07,642 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:16:07,660 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-23 06:16:07,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:16:07,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:16:07,742 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 06:16:07,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:16:07,834 INFO L208 MainTranslator]: Completed translation [2022-07-23 06:16:07,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:07 WrapperNode [2022-07-23 06:16:07,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 06:16:07,836 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 06:16:07,836 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 06:16:07,836 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 06:16:07,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:07" (1/1) ... [2022-07-23 06:16:07,856 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:07" (1/1) ... [2022-07-23 06:16:07,885 INFO L137 Inliner]: procedures = 169, calls = 80, calls flagged for inlining = 25, calls inlined = 7, statements flattened = 65 [2022-07-23 06:16:07,886 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 06:16:07,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 06:16:07,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 06:16:07,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 06:16:07,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:07" (1/1) ... [2022-07-23 06:16:07,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:07" (1/1) ... [2022-07-23 06:16:07,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:07" (1/1) ... [2022-07-23 06:16:07,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:07" (1/1) ... [2022-07-23 06:16:07,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:07" (1/1) ... [2022-07-23 06:16:07,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:07" (1/1) ... [2022-07-23 06:16:07,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:07" (1/1) ... [2022-07-23 06:16:07,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 06:16:07,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 06:16:07,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 06:16:07,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 06:16:07,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:07" (1/1) ... [2022-07-23 06:16:07,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:16:07,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:16:07,953 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) [2022-07-23 06:16:07,984 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-23 06:16:07,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-23 06:16:07,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 06:16:07,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 06:16:07,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 06:16:07,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 06:16:07,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 06:16:07,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-23 06:16:07,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 06:16:07,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 06:16:07,975 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 [2022-07-23 06:16:08,118 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 06:16:08,120 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 06:16:08,281 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 06:16:08,285 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 06:16:08,285 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-23 06:16:08,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:16:08 BoogieIcfgContainer [2022-07-23 06:16:08,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 06:16:08,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 06:16:08,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 06:16:08,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 06:16:08,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 06:16:07" (1/3) ... [2022-07-23 06:16:08,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ebf4ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:16:08, skipping insertion in model container [2022-07-23 06:16:08,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:07" (2/3) ... [2022-07-23 06:16:08,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ebf4ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:16:08, skipping insertion in model container [2022-07-23 06:16:08,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:16:08" (3/3) ... [2022-07-23 06:16:08,292 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test6_2.i [2022-07-23 06:16:08,301 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 06:16:08,301 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-07-23 06:16:08,336 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 06:16:08,341 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@13236960, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c5a0a6f [2022-07-23 06:16:08,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-07-23 06:16:08,344 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 45 states have internal predecessors, (50), 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) [2022-07-23 06:16:08,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 06:16:08,349 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:08,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:16:08,350 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:08,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:08,380 INFO L85 PathProgramCache]: Analyzing trace with hash 566157246, now seen corresponding path program 1 times [2022-07-23 06:16:08,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:08,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605523068] [2022-07-23 06:16:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:08,390 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:08,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:08,392 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) [2022-07-23 06:16:08,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-23 06:16:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:08,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:16:08,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:08,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:16:08,513 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:08,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605523068] [2022-07-23 06:16:08,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605523068] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:16:08,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:16:08,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:16:08,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170506453] [2022-07-23 06:16:08,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:16:08,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:16:08,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:08,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:16:08,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:16:08,544 INFO L87 Difference]: Start difference. First operand has 48 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 45 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Second operand has 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) [2022-07-23 06:16:08,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:08,629 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2022-07-23 06:16:08,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:16:08,631 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 [2022-07-23 06:16:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:08,636 INFO L225 Difference]: With dead ends: 89 [2022-07-23 06:16:08,636 INFO L226 Difference]: Without dead ends: 85 [2022-07-23 06:16:08,637 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 [2022-07-23 06:16:08,639 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 42 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:08,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 218 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:16:08,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-23 06:16:08,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 50. [2022-07-23 06:16:08,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 46 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:16:08,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-07-23 06:16:08,662 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 12 [2022-07-23 06:16:08,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:08,663 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-07-23 06:16:08,663 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) [2022-07-23 06:16:08,663 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-07-23 06:16:08,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 06:16:08,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:08,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:16:08,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:08,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:08,874 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:08,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:08,875 INFO L85 PathProgramCache]: Analyzing trace with hash 566187056, now seen corresponding path program 1 times [2022-07-23 06:16:08,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:08,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524143635] [2022-07-23 06:16:08,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:08,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:08,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:08,877 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) [2022-07-23 06:16:08,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-23 06:16:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:08,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:16:08,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:08,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:16:08,947 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:08,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524143635] [2022-07-23 06:16:08,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524143635] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:16:08,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:16:08,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:16:08,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780560226] [2022-07-23 06:16:08,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:16:08,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:16:08,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:08,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:16:08,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:16:08,960 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 5 states, 4 states have (on average 2.5) 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) [2022-07-23 06:16:08,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:08,984 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-07-23 06:16:08,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:16:08,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) 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 [2022-07-23 06:16:08,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:08,985 INFO L225 Difference]: With dead ends: 48 [2022-07-23 06:16:08,985 INFO L226 Difference]: Without dead ends: 48 [2022-07-23 06:16:08,986 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 [2022-07-23 06:16:08,986 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 36 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:08,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 127 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:16:08,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-23 06:16:08,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-23 06:16:08,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 44 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:16:08,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-07-23 06:16:08,991 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 12 [2022-07-23 06:16:08,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:08,992 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-07-23 06:16:08,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) 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) [2022-07-23 06:16:08,992 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-07-23 06:16:08,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 06:16:08,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:08,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:16:09,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:09,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:09,200 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:09,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:09,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1985999715, now seen corresponding path program 1 times [2022-07-23 06:16:09,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:09,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686125197] [2022-07-23 06:16:09,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:09,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:09,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:09,216 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) [2022-07-23 06:16:09,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-23 06:16:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:09,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:16:09,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:09,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:16:09,313 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:09,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686125197] [2022-07-23 06:16:09,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686125197] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:16:09,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:16:09,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:16:09,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926755066] [2022-07-23 06:16:09,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:16:09,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:16:09,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:09,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:16:09,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:16:09,315 INFO L87 Difference]: Start difference. First operand 48 states and 52 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) [2022-07-23 06:16:09,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:09,344 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2022-07-23 06:16:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:16:09,345 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 [2022-07-23 06:16:09,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:09,346 INFO L225 Difference]: With dead ends: 56 [2022-07-23 06:16:09,346 INFO L226 Difference]: Without dead ends: 56 [2022-07-23 06:16:09,346 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 [2022-07-23 06:16:09,347 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 22 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:09,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 167 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:16:09,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-23 06:16:09,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2022-07-23 06:16:09,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 46 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:16:09,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-07-23 06:16:09,352 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 12 [2022-07-23 06:16:09,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:09,352 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-07-23 06:16:09,352 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) [2022-07-23 06:16:09,352 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-07-23 06:16:09,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 06:16:09,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:09,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:16:09,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:09,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:09,561 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:09,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:09,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1985999298, now seen corresponding path program 1 times [2022-07-23 06:16:09,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:09,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803369096] [2022-07-23 06:16:09,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:09,563 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:09,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:09,567 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) [2022-07-23 06:16:09,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-23 06:16:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:09,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:16:09,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:09,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:16:09,737 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:09,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803369096] [2022-07-23 06:16:09,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803369096] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:16:09,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:16:09,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:16:09,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856560350] [2022-07-23 06:16:09,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:16:09,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:16:09,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:09,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:16:09,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:16:09,739 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2022-07-23 06:16:09,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:09,825 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-07-23 06:16:09,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:16:09,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 [2022-07-23 06:16:09,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:09,827 INFO L225 Difference]: With dead ends: 55 [2022-07-23 06:16:09,827 INFO L226 Difference]: Without dead ends: 55 [2022-07-23 06:16:09,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:16:09,828 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 27 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:09,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 73 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:16:09,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-23 06:16:09,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-07-23 06:16:09,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 47 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:16:09,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2022-07-23 06:16:09,840 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 12 [2022-07-23 06:16:09,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:09,841 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2022-07-23 06:16:09,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2022-07-23 06:16:09,841 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2022-07-23 06:16:09,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 06:16:09,841 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:09,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:16:09,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:10,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:10,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:10,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:10,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1985999297, now seen corresponding path program 1 times [2022-07-23 06:16:10,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:10,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590714148] [2022-07-23 06:16:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:10,049 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:10,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:10,051 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) [2022-07-23 06:16:10,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-23 06:16:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:10,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 06:16:10,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:10,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:16:10,217 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:10,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590714148] [2022-07-23 06:16:10,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590714148] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:16:10,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:16:10,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:16:10,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055852264] [2022-07-23 06:16:10,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:16:10,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:16:10,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:10,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:16:10,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:16:10,220 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2022-07-23 06:16:10,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:10,286 INFO L93 Difference]: Finished difference Result 85 states and 91 transitions. [2022-07-23 06:16:10,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:16:10,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 [2022-07-23 06:16:10,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:10,288 INFO L225 Difference]: With dead ends: 85 [2022-07-23 06:16:10,288 INFO L226 Difference]: Without dead ends: 85 [2022-07-23 06:16:10,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:16:10,289 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 39 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:10,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 165 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:16:10,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-23 06:16:10,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2022-07-23 06:16:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 53 states have (on average 1.6226415094339623) internal successors, (86), 66 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:16:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2022-07-23 06:16:10,295 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 12 [2022-07-23 06:16:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:10,295 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2022-07-23 06:16:10,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2022-07-23 06:16:10,296 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2022-07-23 06:16:10,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 06:16:10,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:10,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:16:10,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:10,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:10,504 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:10,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:10,504 INFO L85 PathProgramCache]: Analyzing trace with hash 371929625, now seen corresponding path program 1 times [2022-07-23 06:16:10,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:10,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537860399] [2022-07-23 06:16:10,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:10,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:10,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:10,507 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) [2022-07-23 06:16:10,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-23 06:16:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:10,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 06:16:10,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:10,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:16:10,645 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:10,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537860399] [2022-07-23 06:16:10,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537860399] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:16:10,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:16:10,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:16:10,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603337573] [2022-07-23 06:16:10,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:16:10,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:16:10,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:10,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:16:10,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:16:10,647 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand has 6 states, 5 states have (on average 2.2) 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) [2022-07-23 06:16:10,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:10,748 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2022-07-23 06:16:10,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:16:10,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) 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 [2022-07-23 06:16:10,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:10,749 INFO L225 Difference]: With dead ends: 83 [2022-07-23 06:16:10,749 INFO L226 Difference]: Without dead ends: 83 [2022-07-23 06:16:10,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:16:10,750 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 80 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:10,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 137 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:16:10,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-23 06:16:10,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 70. [2022-07-23 06:16:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 53 states have (on average 1.5849056603773586) internal successors, (84), 66 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:16:10,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2022-07-23 06:16:10,754 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 13 [2022-07-23 06:16:10,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:10,754 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2022-07-23 06:16:10,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) 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) [2022-07-23 06:16:10,755 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2022-07-23 06:16:10,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 06:16:10,755 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:10,755 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:16:10,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:10,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:10,956 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:10,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:10,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1435524838, now seen corresponding path program 1 times [2022-07-23 06:16:10,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:10,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172782284] [2022-07-23 06:16:10,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:10,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:10,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:10,958 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) [2022-07-23 06:16:10,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-23 06:16:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:11,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:16:11,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:11,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:16:11,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:11,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172782284] [2022-07-23 06:16:11,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172782284] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:16:11,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:16:11,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:16:11,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153170646] [2022-07-23 06:16:11,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:16:11,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:16:11,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:11,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:16:11,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:16:11,072 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 5 states, 5 states have (on average 2.2) 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) [2022-07-23 06:16:11,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:11,103 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2022-07-23 06:16:11,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:16:11,105 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) 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 [2022-07-23 06:16:11,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:11,107 INFO L225 Difference]: With dead ends: 52 [2022-07-23 06:16:11,108 INFO L226 Difference]: Without dead ends: 52 [2022-07-23 06:16:11,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:16:11,111 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:11,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 169 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:16:11,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-23 06:16:11,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2022-07-23 06:16:11,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:16:11,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-07-23 06:16:11,125 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 13 [2022-07-23 06:16:11,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:11,126 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-07-23 06:16:11,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) 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) [2022-07-23 06:16:11,126 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-07-23 06:16:11,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 06:16:11,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:11,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:16:11,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:11,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:11,334 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:11,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:11,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1355083438, now seen corresponding path program 1 times [2022-07-23 06:16:11,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:11,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786541438] [2022-07-23 06:16:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:11,337 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:11,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:11,338 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) [2022-07-23 06:16:11,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-23 06:16:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:11,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:16:11,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:11,413 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 [2022-07-23 06:16:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:11,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:16:11,433 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:11,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786541438] [2022-07-23 06:16:11,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786541438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:16:11,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:16:11,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:16:11,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513421860] [2022-07-23 06:16:11,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:16:11,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:16:11,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:11,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:16:11,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:16:11,435 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-23 06:16:11,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:11,483 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-07-23 06:16:11,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:16:11,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2022-07-23 06:16:11,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:11,484 INFO L225 Difference]: With dead ends: 47 [2022-07-23 06:16:11,484 INFO L226 Difference]: Without dead ends: 47 [2022-07-23 06:16:11,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:16:11,485 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:11,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 101 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:16:11,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-23 06:16:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-07-23 06:16:11,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:16:11,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-07-23 06:16:11,488 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 14 [2022-07-23 06:16:11,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:11,488 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-07-23 06:16:11,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-23 06:16:11,489 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-07-23 06:16:11,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 06:16:11,489 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:11,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:16:11,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:11,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:11,696 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:11,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:11,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1355040639, now seen corresponding path program 1 times [2022-07-23 06:16:11,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:11,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369638163] [2022-07-23 06:16:11,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:11,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:11,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:11,699 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) [2022-07-23 06:16:11,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-23 06:16:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:11,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 06:16:11,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:13,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:16:13,832 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 [2022-07-23 06:16:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:13,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:16:13,888 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:13,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369638163] [2022-07-23 06:16:13,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369638163] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:16:13,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:16:13,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:16:13,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002824305] [2022-07-23 06:16:13,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:16:13,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:16:13,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:13,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:16:13,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=29, Unknown=1, NotChecked=0, Total=42 [2022-07-23 06:16:13,889 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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) [2022-07-23 06:16:13,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:13,998 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2022-07-23 06:16:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:16:13,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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 14 [2022-07-23 06:16:13,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:13,999 INFO L225 Difference]: With dead ends: 49 [2022-07-23 06:16:13,999 INFO L226 Difference]: Without dead ends: 49 [2022-07-23 06:16:14,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=25, Invalid=64, Unknown=1, NotChecked=0, Total=90 [2022-07-23 06:16:14,000 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 47 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:14,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 137 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 60 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2022-07-23 06:16:14,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-23 06:16:14,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-07-23 06:16:14,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:16:14,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-07-23 06:16:14,003 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 14 [2022-07-23 06:16:14,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:14,003 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-07-23 06:16:14,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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) [2022-07-23 06:16:14,003 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-07-23 06:16:14,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 06:16:14,003 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:14,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:16:14,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-07-23 06:16:14,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:14,210 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:14,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:14,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1355040640, now seen corresponding path program 1 times [2022-07-23 06:16:14,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:14,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302914057] [2022-07-23 06:16:14,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:14,211 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:14,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:14,213 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) [2022-07-23 06:16:14,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-23 06:16:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:14,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 06:16:14,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:14,312 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-23 06:16:14,313 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 [2022-07-23 06:16:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:14,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:16:14,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:14,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302914057] [2022-07-23 06:16:14,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302914057] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:16:14,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:16:14,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:16:14,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943401225] [2022-07-23 06:16:14,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:16:14,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:16:14,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:14,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:16:14,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:16:14,363 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2022-07-23 06:16:14,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:14,450 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-07-23 06:16:14,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:16:14,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 14 [2022-07-23 06:16:14,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:14,451 INFO L225 Difference]: With dead ends: 48 [2022-07-23 06:16:14,451 INFO L226 Difference]: Without dead ends: 48 [2022-07-23 06:16:14,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-23 06:16:14,451 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 21 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:14,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 121 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-07-23 06:16:14,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-23 06:16:14,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2022-07-23 06:16:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:16:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-07-23 06:16:14,454 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 14 [2022-07-23 06:16:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:14,454 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-07-23 06:16:14,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2022-07-23 06:16:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-07-23 06:16:14,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 06:16:14,454 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:14,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:16:14,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:14,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:14,661 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:14,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:14,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1579844705, now seen corresponding path program 1 times [2022-07-23 06:16:14,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:14,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345345269] [2022-07-23 06:16:14,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:14,662 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:14,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:14,670 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) [2022-07-23 06:16:14,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-23 06:16:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:14,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:16:14,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:14,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:16:14,729 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:14,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345345269] [2022-07-23 06:16:14,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345345269] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:16:14,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:16:14,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 06:16:14,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920167300] [2022-07-23 06:16:14,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:16:14,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:16:14,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:14,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:16:14,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:16:14,731 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-23 06:16:14,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:14,770 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2022-07-23 06:16:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:16:14,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2022-07-23 06:16:14,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:14,771 INFO L225 Difference]: With dead ends: 47 [2022-07-23 06:16:14,771 INFO L226 Difference]: Without dead ends: 38 [2022-07-23 06:16:14,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:16:14,772 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:14,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:16:14,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-23 06:16:14,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-23 06:16:14,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 35 states have internal predecessors, (38), 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) [2022-07-23 06:16:14,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-07-23 06:16:14,774 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 14 [2022-07-23 06:16:14,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:14,774 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-07-23 06:16:14,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-23 06:16:14,774 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-07-23 06:16:14,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 06:16:14,775 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:14,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:16:14,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:14,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:14,979 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:14,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:14,980 INFO L85 PathProgramCache]: Analyzing trace with hash -893009794, now seen corresponding path program 1 times [2022-07-23 06:16:14,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:14,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521066185] [2022-07-23 06:16:14,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:14,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:14,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:14,982 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) [2022-07-23 06:16:14,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-23 06:16:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:15,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:16:15,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:15,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:15,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:16:15,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:15,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521066185] [2022-07-23 06:16:15,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521066185] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:16:15,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:16:15,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:16:15,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699342380] [2022-07-23 06:16:15,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:16:15,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:16:15,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:15,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:16:15,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:16:15,048 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:16:15,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:15,080 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-07-23 06:16:15,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:16:15,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-23 06:16:15,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:15,081 INFO L225 Difference]: With dead ends: 46 [2022-07-23 06:16:15,081 INFO L226 Difference]: Without dead ends: 46 [2022-07-23 06:16:15,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:16:15,082 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 21 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:15,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 138 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:16:15,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-23 06:16:15,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-07-23 06:16:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 37 states have internal predecessors, (40), 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) [2022-07-23 06:16:15,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-07-23 06:16:15,084 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 17 [2022-07-23 06:16:15,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:15,084 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-07-23 06:16:15,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:16:15,084 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-07-23 06:16:15,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 06:16:15,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:15,085 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:16:15,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:15,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:15,292 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:15,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:15,293 INFO L85 PathProgramCache]: Analyzing trace with hash -893009377, now seen corresponding path program 1 times [2022-07-23 06:16:15,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:15,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663698564] [2022-07-23 06:16:15,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:15,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:15,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:15,296 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) [2022-07-23 06:16:15,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-23 06:16:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:15,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 06:16:15,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:15,404 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:16:15,405 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 18 treesize of output 25 [2022-07-23 06:16:15,474 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 14 treesize of output 16 [2022-07-23 06:16:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:15,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:16:15,484 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:15,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663698564] [2022-07-23 06:16:15,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663698564] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:16:15,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:16:15,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:16:15,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600417431] [2022-07-23 06:16:15,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:16:15,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:16:15,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:15,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:16:15,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:16:15,486 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:16:15,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:15,572 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2022-07-23 06:16:15,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:16:15,572 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-23 06:16:15,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:15,573 INFO L225 Difference]: With dead ends: 45 [2022-07-23 06:16:15,573 INFO L226 Difference]: Without dead ends: 45 [2022-07-23 06:16:15,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-23 06:16:15,573 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:15,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 82 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-07-23 06:16:15,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-23 06:16:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2022-07-23 06:16:15,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 38 states have internal predecessors, (42), 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) [2022-07-23 06:16:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-07-23 06:16:15,575 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 17 [2022-07-23 06:16:15,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:15,575 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-07-23 06:16:15,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:16:15,575 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-07-23 06:16:15,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 06:16:15,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:15,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:16:15,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:15,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:15,783 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:15,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:15,784 INFO L85 PathProgramCache]: Analyzing trace with hash -893009376, now seen corresponding path program 1 times [2022-07-23 06:16:15,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:15,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625241869] [2022-07-23 06:16:15,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:15,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:15,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:15,785 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) [2022-07-23 06:16:15,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-23 06:16:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:15,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:16:15,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:17,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:16:17,949 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 [2022-07-23 06:16:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:18,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:16:18,008 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:18,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625241869] [2022-07-23 06:16:18,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625241869] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:16:18,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:16:18,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:16:18,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747426117] [2022-07-23 06:16:18,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:16:18,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:16:18,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:18,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:16:18,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=19, Unknown=1, NotChecked=0, Total=30 [2022-07-23 06:16:18,010 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:16:18,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:18,078 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-07-23 06:16:18,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:16:18,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-23 06:16:18,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:18,079 INFO L225 Difference]: With dead ends: 40 [2022-07-23 06:16:18,079 INFO L226 Difference]: Without dead ends: 40 [2022-07-23 06:16:18,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=20, Invalid=35, Unknown=1, NotChecked=0, Total=56 [2022-07-23 06:16:18,080 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 31 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:18,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 95 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-07-23 06:16:18,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-23 06:16:18,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-07-23 06:16:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 37 states have internal predecessors, (40), 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) [2022-07-23 06:16:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-07-23 06:16:18,081 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 17 [2022-07-23 06:16:18,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:18,082 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-07-23 06:16:18,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:16:18,082 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-07-23 06:16:18,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-23 06:16:18,082 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:18,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:16:18,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:18,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:18,289 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:18,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:18,289 INFO L85 PathProgramCache]: Analyzing trace with hash 811449152, now seen corresponding path program 1 times [2022-07-23 06:16:18,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:18,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833948182] [2022-07-23 06:16:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:18,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:18,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:18,291 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) [2022-07-23 06:16:18,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-23 06:16:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:18,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 06:16:18,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:18,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:16:18,475 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:18,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833948182] [2022-07-23 06:16:18,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833948182] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:16:18,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:16:18,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 06:16:18,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995387374] [2022-07-23 06:16:18,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:16:18,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:16:18,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:18,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:16:18,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:16:18,476 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-07-23 06:16:18,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:18,498 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2022-07-23 06:16:18,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:16:18,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 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 19 [2022-07-23 06:16:18,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:18,499 INFO L225 Difference]: With dead ends: 43 [2022-07-23 06:16:18,499 INFO L226 Difference]: Without dead ends: 35 [2022-07-23 06:16:18,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:16:18,499 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:18,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 147 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 51 Unchecked, 0.0s Time] [2022-07-23 06:16:18,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-23 06:16:18,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-07-23 06:16:18,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 32 states have internal predecessors, (33), 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) [2022-07-23 06:16:18,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-07-23 06:16:18,501 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 19 [2022-07-23 06:16:18,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:18,501 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-07-23 06:16:18,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-07-23 06:16:18,502 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-07-23 06:16:18,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-23 06:16:18,502 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:18,502 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] [2022-07-23 06:16:18,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:18,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:18,708 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:18,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:18,708 INFO L85 PathProgramCache]: Analyzing trace with hash 198913356, now seen corresponding path program 1 times [2022-07-23 06:16:18,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:18,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138908437] [2022-07-23 06:16:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:18,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:18,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:18,713 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) [2022-07-23 06:16:18,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-23 06:16:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:18,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 06:16:18,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:18,828 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:16:18,829 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 18 treesize of output 25 [2022-07-23 06:16:18,910 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 14 treesize of output 16 [2022-07-23 06:16:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:18,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:16:18,928 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:18,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138908437] [2022-07-23 06:16:18,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138908437] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:16:18,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:16:18,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 06:16:18,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739827895] [2022-07-23 06:16:18,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:16:18,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:16:18,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:18,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:16:18,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:16:18,930 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:16:19,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:19,048 INFO L93 Difference]: Finished difference Result 37 states and 36 transitions. [2022-07-23 06:16:19,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:16:19,048 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-07-23 06:16:19,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:19,049 INFO L225 Difference]: With dead ends: 37 [2022-07-23 06:16:19,049 INFO L226 Difference]: Without dead ends: 37 [2022-07-23 06:16:19,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-23 06:16:19,049 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:19,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 78 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2022-07-23 06:16:19,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-23 06:16:19,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2022-07-23 06:16:19,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 31 states have internal predecessors, (32), 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) [2022-07-23 06:16:19,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2022-07-23 06:16:19,051 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 20 [2022-07-23 06:16:19,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:19,051 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2022-07-23 06:16:19,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:16:19,051 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2022-07-23 06:16:19,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-23 06:16:19,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:19,052 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] [2022-07-23 06:16:19,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-07-23 06:16:19,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:19,252 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:19,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:19,253 INFO L85 PathProgramCache]: Analyzing trace with hash 198913357, now seen corresponding path program 1 times [2022-07-23 06:16:19,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:19,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250472345] [2022-07-23 06:16:19,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:19,253 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:19,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:19,254 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) [2022-07-23 06:16:19,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-23 06:16:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:19,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:16:19,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:19,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:16:19,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:19,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250472345] [2022-07-23 06:16:19,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250472345] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:16:19,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:16:19,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:16:19,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852943046] [2022-07-23 06:16:19,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:16:19,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:16:19,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:19,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:16:19,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:16:19,457 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:16:19,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:19,519 INFO L93 Difference]: Finished difference Result 36 states and 35 transitions. [2022-07-23 06:16:19,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:16:19,520 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-07-23 06:16:19,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:19,520 INFO L225 Difference]: With dead ends: 36 [2022-07-23 06:16:19,520 INFO L226 Difference]: Without dead ends: 36 [2022-07-23 06:16:19,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:16:19,521 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 54 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:19,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 50 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:16:19,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-23 06:16:19,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-07-23 06:16:19,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 30 states have internal predecessors, (31), 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) [2022-07-23 06:16:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-07-23 06:16:19,522 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2022-07-23 06:16:19,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:19,522 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-07-23 06:16:19,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:16:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-07-23 06:16:19,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 06:16:19,523 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:19,523 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] [2022-07-23 06:16:19,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:19,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:19,725 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:19,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:19,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1871346763, now seen corresponding path program 1 times [2022-07-23 06:16:19,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:19,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685741427] [2022-07-23 06:16:19,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:19,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:19,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:19,731 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) [2022-07-23 06:16:19,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-23 06:16:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:19,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-23 06:16:19,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:19,929 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 [2022-07-23 06:16:19,948 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 [2022-07-23 06:16:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:19,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:16:19,955 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:19,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685741427] [2022-07-23 06:16:19,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685741427] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:16:19,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:16:19,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-23 06:16:19,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170368924] [2022-07-23 06:16:19,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:16:19,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 06:16:19,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:19,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 06:16:19,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-23 06:16:19,956 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:16:20,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:20,069 INFO L93 Difference]: Finished difference Result 35 states and 34 transitions. [2022-07-23 06:16:20,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:16:20,069 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-07-23 06:16:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:20,070 INFO L225 Difference]: With dead ends: 35 [2022-07-23 06:16:20,070 INFO L226 Difference]: Without dead ends: 35 [2022-07-23 06:16:20,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-07-23 06:16:20,070 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:20,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 99 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:16:20,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-23 06:16:20,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-07-23 06:16:20,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 29 states have internal predecessors, (30), 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) [2022-07-23 06:16:20,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2022-07-23 06:16:20,072 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 21 [2022-07-23 06:16:20,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:20,072 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2022-07-23 06:16:20,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:16:20,072 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-07-23 06:16:20,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 06:16:20,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:20,072 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] [2022-07-23 06:16:20,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:20,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:20,273 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:20,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:20,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2117792404, now seen corresponding path program 1 times [2022-07-23 06:16:20,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:20,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000166586] [2022-07-23 06:16:20,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:20,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:20,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:20,275 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) [2022-07-23 06:16:20,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-23 06:16:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:20,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-23 06:16:20,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:20,463 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 [2022-07-23 06:16:20,525 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 23 treesize of output 11 [2022-07-23 06:16:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:20,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:16:20,589 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:20,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000166586] [2022-07-23 06:16:20,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000166586] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:16:20,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:16:20,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-23 06:16:20,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786660996] [2022-07-23 06:16:20,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:16:20,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 06:16:20,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:20,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 06:16:20,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-23 06:16:20,590 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:16:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:20,747 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2022-07-23 06:16:20,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 06:16:20,748 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-07-23 06:16:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:20,748 INFO L225 Difference]: With dead ends: 31 [2022-07-23 06:16:20,748 INFO L226 Difference]: Without dead ends: 31 [2022-07-23 06:16:20,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-07-23 06:16:20,749 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 76 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:20,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 75 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:16:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-23 06:16:20,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-23 06:16:20,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 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) [2022-07-23 06:16:20,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-07-23 06:16:20,750 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 22 [2022-07-23 06:16:20,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:20,750 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-07-23 06:16:20,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:16:20,750 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-07-23 06:16:20,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 06:16:20,750 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:20,750 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] [2022-07-23 06:16:20,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:20,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:20,951 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:20,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:20,952 INFO L85 PathProgramCache]: Analyzing trace with hash -2117391218, now seen corresponding path program 1 times [2022-07-23 06:16:20,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:20,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561058076] [2022-07-23 06:16:20,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:20,952 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:20,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:20,953 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) [2022-07-23 06:16:20,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-23 06:16:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:21,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 06:16:21,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:21,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:16:21,256 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:21,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561058076] [2022-07-23 06:16:21,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561058076] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:16:21,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:16:21,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:16:21,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451487887] [2022-07-23 06:16:21,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:16:21,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:16:21,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:21,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:16:21,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:16:21,257 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:16:21,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:21,443 INFO L93 Difference]: Finished difference Result 30 states and 29 transitions. [2022-07-23 06:16:21,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:16:21,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-07-23 06:16:21,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:21,445 INFO L225 Difference]: With dead ends: 30 [2022-07-23 06:16:21,445 INFO L226 Difference]: Without dead ends: 30 [2022-07-23 06:16:21,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:16:21,445 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:21,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 58 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:16:21,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-23 06:16:21,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-23 06:16:21,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.08) internal successors, (27), 27 states have internal predecessors, (27), 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) [2022-07-23 06:16:21,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 29 transitions. [2022-07-23 06:16:21,446 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 29 transitions. Word has length 22 [2022-07-23 06:16:21,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:21,447 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 29 transitions. [2022-07-23 06:16:21,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:16:21,447 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 29 transitions. [2022-07-23 06:16:21,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 06:16:21,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:21,447 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] [2022-07-23 06:16:21,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:21,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:21,648 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 13 more)] === [2022-07-23 06:16:21,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:21,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1227054995, now seen corresponding path program 1 times [2022-07-23 06:16:21,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:21,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [344460328] [2022-07-23 06:16:21,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:21,649 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:21,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:21,651 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) [2022-07-23 06:16:21,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-23 06:16:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-23 06:16:21,724 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-23 06:16:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-23 06:16:21,818 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-07-23 06:16:21,818 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-23 06:16:21,819 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (15 of 16 remaining) [2022-07-23 06:16:21,820 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2022-07-23 06:16:21,820 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2022-07-23 06:16:21,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (12 of 16 remaining) [2022-07-23 06:16:21,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE (11 of 16 remaining) [2022-07-23 06:16:21,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE (10 of 16 remaining) [2022-07-23 06:16:21,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE (9 of 16 remaining) [2022-07-23 06:16:21,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE (8 of 16 remaining) [2022-07-23 06:16:21,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE (7 of 16 remaining) [2022-07-23 06:16:21,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2022-07-23 06:16:21,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2022-07-23 06:16:21,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE (4 of 16 remaining) [2022-07-23 06:16:21,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE (3 of 16 remaining) [2022-07-23 06:16:21,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2022-07-23 06:16:21,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2022-07-23 06:16:21,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2022-07-23 06:16:21,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:22,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:22,034 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:16:22,037 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-23 06:16:22,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 06:16:22 BoogieIcfgContainer [2022-07-23 06:16:22,089 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-23 06:16:22,090 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-23 06:16:22,090 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-23 06:16:22,090 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-23 06:16:22,091 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:16:08" (3/4) ... [2022-07-23 06:16:22,092 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-23 06:16:22,173 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-23 06:16:22,173 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-23 06:16:22,174 INFO L158 Benchmark]: Toolchain (without parser) took 14899.52ms. Allocated memory was 54.5MB in the beginning and 113.2MB in the end (delta: 58.7MB). Free memory was 31.3MB in the beginning and 52.7MB in the end (delta: -21.4MB). Peak memory consumption was 36.8MB. Max. memory is 16.1GB. [2022-07-23 06:16:22,174 INFO L158 Benchmark]: CDTParser took 0.72ms. Allocated memory is still 54.5MB. Free memory was 36.3MB in the beginning and 36.2MB in the end (delta: 52.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 06:16:22,178 INFO L158 Benchmark]: CACSL2BoogieTranslator took 560.20ms. Allocated memory was 54.5MB in the beginning and 77.6MB in the end (delta: 23.1MB). Free memory was 31.1MB in the beginning and 42.6MB in the end (delta: -11.5MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. [2022-07-23 06:16:22,178 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.21ms. Allocated memory is still 77.6MB. Free memory was 42.6MB in the beginning and 59.8MB in the end (delta: -17.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-23 06:16:22,178 INFO L158 Benchmark]: Boogie Preprocessor took 28.91ms. Allocated memory is still 77.6MB. Free memory was 59.8MB in the beginning and 58.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 06:16:22,178 INFO L158 Benchmark]: RCFGBuilder took 370.00ms. Allocated memory is still 77.6MB. Free memory was 58.0MB in the beginning and 45.1MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-23 06:16:22,179 INFO L158 Benchmark]: TraceAbstraction took 13801.64ms. Allocated memory was 77.6MB in the beginning and 113.2MB in the end (delta: 35.7MB). Free memory was 44.5MB in the beginning and 55.8MB in the end (delta: -11.3MB). Peak memory consumption was 23.4MB. Max. memory is 16.1GB. [2022-07-23 06:16:22,179 INFO L158 Benchmark]: Witness Printer took 83.29ms. Allocated memory is still 113.2MB. Free memory was 55.8MB in the beginning and 52.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-23 06:16:22,182 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.72ms. Allocated memory is still 54.5MB. Free memory was 36.3MB in the beginning and 36.2MB in the end (delta: 52.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 560.20ms. Allocated memory was 54.5MB in the beginning and 77.6MB in the end (delta: 23.1MB). Free memory was 31.1MB in the beginning and 42.6MB in the end (delta: -11.5MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.21ms. Allocated memory is still 77.6MB. Free memory was 42.6MB in the beginning and 59.8MB in the end (delta: -17.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.91ms. Allocated memory is still 77.6MB. Free memory was 59.8MB in the beginning and 58.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 370.00ms. Allocated memory is still 77.6MB. Free memory was 58.0MB in the beginning and 45.1MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 13801.64ms. Allocated memory was 77.6MB in the beginning and 113.2MB in the end (delta: 35.7MB). Free memory was 44.5MB in the beginning and 55.8MB in the end (delta: -11.3MB). Peak memory consumption was 23.4MB. Max. memory is 16.1GB. * Witness Printer took 83.29ms. Allocated memory is still 113.2MB. Free memory was 55.8MB in the beginning and 52.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 782]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; [L784] struct A a6; VAL [a6={2:0}, ldv_global_msg_list={1:0}] [L793] CALL entry_point() [L786] CALL, EXPR probe3_6(&a6) [L764] int ret = - -3; VAL [a={2:0}, a={2:0}, a6={2:0}, ldv_global_msg_list={1:0}, ret=3] [L765] CALL, EXPR ldv_malloc(sizeof(int)) VAL [\old(size)=4, a6={2:0}, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L765] RET, EXPR ldv_malloc(sizeof(int)) VAL [a={2:0}, a={2:0}, a6={2:0}, ldv_global_msg_list={1:0}, ldv_malloc(sizeof(int))={6:0}, ret=3] [L765] int *p = (int *)ldv_malloc(sizeof(int)); [L766] COND FALSE !(p==0) [L768] CALL, EXPR f6() [L758] return __VERIFIER_nondet_int(); [L768] RET, EXPR f6() [L768] ret = f6() [L769] COND FALSE !(ret<0) [L771] CALL, EXPR g6() [L761] return __VERIFIER_nondet_int(); [L771] RET, EXPR g6() [L771] ret = g6() [L772] COND FALSE !(ret<0) VAL [a={2:0}, a={2:0}, a6={2:0}, ldv_global_msg_list={1:0}, p={6:0}, ret=0] [L774] a->p = p VAL [a={2:0}, a={2:0}, a6={2:0}, ldv_global_msg_list={1:0}, p={6:0}, ret=0] [L775] free(p) VAL [a={2:0}, a={2:0}, a6={2:0}, ldv_global_msg_list={1:0}, p={6:0}, ret=0] [L775] free(p) VAL [a={2:0}, a={2:0}, a6={2:0}, ldv_global_msg_list={1:0}, p={6:0}, ret=0] [L775] free(p) [L776] return 0; VAL [\result=0, a={2:0}, a={2:0}, a6={2:0}, ldv_global_msg_list={1:0}, p={6:0}, ret=0] [L786] RET, EXPR probe3_6(&a6) [L786] int ret = probe3_6(&a6); [L787] COND TRUE ret==0 [L788] CALL disconnect_6(&a6) [L782] EXPR a->p VAL [a={2:0}, a={2:0}, a->p={6:0}, a6={2:0}, ldv_global_msg_list={1:0}] [L782] free(a->p) VAL [a={2:0}, a={2:0}, a->p={6:0}, a6={2:0}, ldv_global_msg_list={1:0}] [L782] free(a->p) VAL [a={2:0}, a={2:0}, a->p={6:0}, a6={2:0}, ldv_global_msg_list={1:0}] [L782] free(a->p) VAL [a={2:0}, a={2:0}, a->p={6:0}, a6={2:0}, ldv_global_msg_list={1:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 775]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 775]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 775]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 778]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 778]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 778]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 782]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 782]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 792]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 48 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 13.7s, OverallIterations: 21, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 660 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 658 mSDsluCounter, 2333 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 129 IncrementalHoareTripleChecker+Unchecked, 1613 mSDsCounter, 54 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 837 IncrementalHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 54 mSolverCounterUnsat, 720 mSDtfsCounter, 837 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 329 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 5.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=5, InterpolantAutomatonStates: 122, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 101 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 340 NumberOfCodeBlocks, 340 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 297 ConstructedInterpolants, 24 QuantifiedInterpolants, 2200 SizeOfPredicates, 52 NumberOfNonLiveVariables, 1239 ConjunctsInSsa, 165 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-23 06:16:22,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free)