./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c 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/uthash-2.0.2/uthash_SAX_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 bb48026e7f870ff561a4cdd394c24cb5edb1d0f2fc8e8ef2bffe0b7b8438fda4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-13 01:43:52,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 01:43:52,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 01:43:52,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 01:43:52,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 01:43:52,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 01:43:52,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 01:43:52,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 01:43:52,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 01:43:52,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 01:43:52,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 01:43:52,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 01:43:52,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 01:43:52,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 01:43:52,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 01:43:52,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 01:43:52,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 01:43:52,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 01:43:52,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 01:43:52,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 01:43:52,913 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 01:43:52,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 01:43:52,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 01:43:52,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 01:43:52,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 01:43:52,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 01:43:52,921 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 01:43:52,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 01:43:52,922 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 01:43:52,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 01:43:52,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 01:43:52,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 01:43:52,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 01:43:52,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 01:43:52,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 01:43:52,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 01:43:52,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 01:43:52,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 01:43:52,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 01:43:52,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 01:43:52,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 01:43:52,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 01:43:52,930 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-13 01:43:52,951 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 01:43:52,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 01:43:52,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 01:43:52,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 01:43:52,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 01:43:52,953 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 01:43:52,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 01:43:52,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 01:43:52,953 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 01:43:52,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 01:43:52,954 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 01:43:52,954 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-13 01:43:52,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 01:43:52,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 01:43:52,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 01:43:52,955 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-13 01:43:52,955 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-13 01:43:52,955 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-13 01:43:52,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 01:43:52,956 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-13 01:43:52,956 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 01:43:52,957 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 01:43:52,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 01:43:52,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 01:43:52,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 01:43:52,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 01:43:52,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 01:43:52,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 01:43:52,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 01:43:52,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 01:43:52,958 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb48026e7f870ff561a4cdd394c24cb5edb1d0f2fc8e8ef2bffe0b7b8438fda4 [2022-07-13 01:43:53,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 01:43:53,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 01:43:53,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 01:43:53,162 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 01:43:53,162 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 01:43:53,163 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i [2022-07-13 01:43:53,222 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ced46ac89/ce0437d19b8d4864b7b54a7f689cd782/FLAG7e164cffd [2022-07-13 01:43:53,653 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 01:43:53,653 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i [2022-07-13 01:43:53,667 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ced46ac89/ce0437d19b8d4864b7b54a7f689cd782/FLAG7e164cffd [2022-07-13 01:43:53,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ced46ac89/ce0437d19b8d4864b7b54a7f689cd782 [2022-07-13 01:43:53,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 01:43:53,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 01:43:53,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 01:43:53,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 01:43:53,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 01:43:53,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:43:53" (1/1) ... [2022-07-13 01:43:53,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@693c9ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:43:53, skipping insertion in model container [2022-07-13 01:43:53,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:43:53" (1/1) ... [2022-07-13 01:43:53,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 01:43:53,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 01:43:54,036 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[44118,44131] [2022-07-13 01:43:54,052 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[44660,44673] [2022-07-13 01:43:54,127 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[56247,56260] [2022-07-13 01:43:54,130 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[56368,56381] [2022-07-13 01:43:54,142 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 01:43:54,152 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) [2022-07-13 01:43:54,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4685c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:43:54, skipping insertion in model container [2022-07-13 01:43:54,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 01:43:54,155 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-13 01:43:54,156 INFO L158 Benchmark]: Toolchain (without parser) took 468.69ms. Allocated memory was 98.6MB in the beginning and 157.3MB in the end (delta: 58.7MB). Free memory was 67.8MB in the beginning and 118.7MB in the end (delta: -50.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 01:43:54,157 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 98.6MB. Free memory is still 55.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 01:43:54,157 INFO L158 Benchmark]: CACSL2BoogieTranslator took 465.36ms. Allocated memory was 98.6MB in the beginning and 157.3MB in the end (delta: 58.7MB). Free memory was 67.8MB in the beginning and 118.7MB in the end (delta: -50.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 01:43:54,159 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 98.6MB. Free memory is still 55.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 465.36ms. Allocated memory was 98.6MB in the beginning and 157.3MB in the end (delta: 58.7MB). Free memory was 67.8MB in the beginning and 118.7MB in the end (delta: -50.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 990]: 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/uthash-2.0.2/uthash_SAX_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 bb48026e7f870ff561a4cdd394c24cb5edb1d0f2fc8e8ef2bffe0b7b8438fda4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-13 01:43:55,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 01:43:55,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 01:43:55,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 01:43:55,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 01:43:55,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 01:43:55,597 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 01:43:55,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 01:43:55,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 01:43:55,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 01:43:55,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 01:43:55,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 01:43:55,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 01:43:55,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 01:43:55,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 01:43:55,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 01:43:55,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 01:43:55,613 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 01:43:55,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 01:43:55,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 01:43:55,619 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 01:43:55,620 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 01:43:55,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 01:43:55,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 01:43:55,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 01:43:55,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 01:43:55,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 01:43:55,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 01:43:55,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 01:43:55,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 01:43:55,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 01:43:55,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 01:43:55,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 01:43:55,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 01:43:55,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 01:43:55,643 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 01:43:55,643 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 01:43:55,644 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 01:43:55,644 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 01:43:55,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 01:43:55,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 01:43:55,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 01:43:55,649 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-13 01:43:55,679 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 01:43:55,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 01:43:55,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 01:43:55,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 01:43:55,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 01:43:55,680 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 01:43:55,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 01:43:55,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 01:43:55,681 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 01:43:55,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 01:43:55,681 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 01:43:55,682 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-13 01:43:55,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 01:43:55,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 01:43:55,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 01:43:55,682 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-13 01:43:55,682 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-13 01:43:55,682 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-13 01:43:55,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 01:43:55,683 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-13 01:43:55,683 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-13 01:43:55,683 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-13 01:43:55,683 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 01:43:55,684 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 01:43:55,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 01:43:55,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 01:43:55,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 01:43:55,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 01:43:55,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 01:43:55,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 01:43:55,685 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-13 01:43:55,685 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-13 01:43:55,685 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-13 01:43:55,686 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb48026e7f870ff561a4cdd394c24cb5edb1d0f2fc8e8ef2bffe0b7b8438fda4 [2022-07-13 01:43:55,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 01:43:55,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 01:43:55,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 01:43:55,984 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 01:43:55,985 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 01:43:55,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i [2022-07-13 01:43:56,031 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e79a33284/0923cafb43254c3a840537d282ffa90b/FLAG504c719d7 [2022-07-13 01:43:56,488 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 01:43:56,488 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i [2022-07-13 01:43:56,505 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e79a33284/0923cafb43254c3a840537d282ffa90b/FLAG504c719d7 [2022-07-13 01:43:56,794 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e79a33284/0923cafb43254c3a840537d282ffa90b [2022-07-13 01:43:56,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 01:43:56,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 01:43:56,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 01:43:56,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 01:43:56,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 01:43:56,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:43:56" (1/1) ... [2022-07-13 01:43:56,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b36d7f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:43:56, skipping insertion in model container [2022-07-13 01:43:56,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:43:56" (1/1) ... [2022-07-13 01:43:56,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 01:43:56,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 01:43:57,203 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[44118,44131] [2022-07-13 01:43:57,212 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[44660,44673] [2022-07-13 01:43:57,301 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[56247,56260] [2022-07-13 01:43:57,304 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[56368,56381] [2022-07-13 01:43:57,315 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 01:43:57,335 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-13 01:43:57,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 01:43:57,394 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[44118,44131] [2022-07-13 01:43:57,401 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[44660,44673] [2022-07-13 01:43:57,467 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[56247,56260] [2022-07-13 01:43:57,468 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[56368,56381] [2022-07-13 01:43:57,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 01:43:57,478 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 01:43:57,500 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[44118,44131] [2022-07-13 01:43:57,502 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[44660,44673] [2022-07-13 01:43:57,524 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[56247,56260] [2022-07-13 01:43:57,525 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[56368,56381] [2022-07-13 01:43:57,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 01:43:57,579 INFO L208 MainTranslator]: Completed translation [2022-07-13 01:43:57,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:43:57 WrapperNode [2022-07-13 01:43:57,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 01:43:57,581 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 01:43:57,581 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 01:43:57,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 01:43:57,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:43:57" (1/1) ... [2022-07-13 01:43:57,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:43:57" (1/1) ... [2022-07-13 01:43:57,668 INFO L137 Inliner]: procedures = 285, calls = 347, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1204 [2022-07-13 01:43:57,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 01:43:57,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 01:43:57,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 01:43:57,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 01:43:57,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:43:57" (1/1) ... [2022-07-13 01:43:57,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:43:57" (1/1) ... [2022-07-13 01:43:57,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:43:57" (1/1) ... [2022-07-13 01:43:57,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:43:57" (1/1) ... [2022-07-13 01:43:57,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:43:57" (1/1) ... [2022-07-13 01:43:57,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:43:57" (1/1) ... [2022-07-13 01:43:57,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:43:57" (1/1) ... [2022-07-13 01:43:57,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 01:43:57,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 01:43:57,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 01:43:57,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 01:43:57,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:43:57" (1/1) ... [2022-07-13 01:43:57,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 01:43:57,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 01:43:57,818 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) [2022-07-13 01:43:57,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-13 01:43:57,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-13 01:43:57,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 01:43:57,851 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-13 01:43:57,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-13 01:43:57,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 01:43:57,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-13 01:43:57,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-13 01:43:57,852 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2022-07-13 01:43:57,852 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2022-07-13 01:43:57,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 01:43:57,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 01:43:57,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 01:43:57,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 01:43:57,853 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2022-07-13 01:43:57,853 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2022-07-13 01:43:57,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-13 01:43:57,853 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2022-07-13 01:43:57,853 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2022-07-13 01:43:57,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 01:43:57,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 01:43:57,837 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 [2022-07-13 01:43:58,069 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 01:43:58,070 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 01:44:01,359 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 01:44:01,378 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 01:44:01,378 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2022-07-13 01:44:01,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:44:01 BoogieIcfgContainer [2022-07-13 01:44:01,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 01:44:01,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 01:44:01,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 01:44:01,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 01:44:01,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 01:43:56" (1/3) ... [2022-07-13 01:44:01,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2da2b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:44:01, skipping insertion in model container [2022-07-13 01:44:01,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:43:57" (2/3) ... [2022-07-13 01:44:01,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2da2b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:44:01, skipping insertion in model container [2022-07-13 01:44:01,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:44:01" (3/3) ... [2022-07-13 01:44:01,388 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test6-2.i [2022-07-13 01:44:01,398 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 01:44:01,399 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 634 error locations. [2022-07-13 01:44:01,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 01:44:01,474 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@570b5f31, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@51521a71 [2022-07-13 01:44:01,475 INFO L358 AbstractCegarLoop]: Starting to check reachability of 634 error locations. [2022-07-13 01:44:01,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 1280 states, 626 states have (on average 2.2444089456869007) internal successors, (1405), 1260 states have internal predecessors, (1405), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-13 01:44:01,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-13 01:44:01,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:44:01,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-13 01:44:01,488 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:44:01,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:44:01,492 INFO L85 PathProgramCache]: Analyzing trace with hash 77521, now seen corresponding path program 1 times [2022-07-13 01:44:01,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:44:01,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642968639] [2022-07-13 01:44:01,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:44:01,501 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:44:01,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:44:01,503 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) [2022-07-13 01:44:01,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-13 01:44:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:44:01,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 01:44:01,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:44:01,735 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 [2022-07-13 01:44:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:44:01,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:44:01,762 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:44:01,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642968639] [2022-07-13 01:44:01,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642968639] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:44:01,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:44:01,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 01:44:01,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52800002] [2022-07-13 01:44:01,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:44:01,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 01:44:01,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:44:01,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 01:44:01,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:44:01,785 INFO L87 Difference]: Start difference. First operand has 1280 states, 626 states have (on average 2.2444089456869007) internal successors, (1405), 1260 states have internal predecessors, (1405), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:03,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:44:03,806 INFO L93 Difference]: Finished difference Result 1537 states and 1627 transitions. [2022-07-13 01:44:03,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 01:44:03,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-13 01:44:03,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:44:03,824 INFO L225 Difference]: With dead ends: 1537 [2022-07-13 01:44:03,824 INFO L226 Difference]: Without dead ends: 1535 [2022-07-13 01:44:03,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:44:03,828 INFO L413 NwaCegarLoop]: 911 mSDtfsCounter, 906 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 01:44:03,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 1258 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 01:44:03,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2022-07-13 01:44:03,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1300. [2022-07-13 01:44:03,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 660 states have (on average 2.106060606060606) internal successors, (1390), 1281 states have internal predecessors, (1390), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-13 01:44:03,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1420 transitions. [2022-07-13 01:44:03,917 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1420 transitions. Word has length 3 [2022-07-13 01:44:03,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:44:03,917 INFO L495 AbstractCegarLoop]: Abstraction has 1300 states and 1420 transitions. [2022-07-13 01:44:03,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:03,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1420 transitions. [2022-07-13 01:44:03,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-13 01:44:03,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:44:03,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-13 01:44:03,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-13 01:44:04,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:44:04,133 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:44:04,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:44:04,133 INFO L85 PathProgramCache]: Analyzing trace with hash 77522, now seen corresponding path program 1 times [2022-07-13 01:44:04,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:44:04,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950595445] [2022-07-13 01:44:04,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:44:04,134 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:44:04,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:44:04,135 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) [2022-07-13 01:44:04,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-13 01:44:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:44:04,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 01:44:04,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:44:04,265 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 [2022-07-13 01:44:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:44:04,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:44:04,274 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:44:04,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950595445] [2022-07-13 01:44:04,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950595445] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:44:04,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:44:04,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 01:44:04,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996622424] [2022-07-13 01:44:04,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:44:04,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 01:44:04,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:44:04,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 01:44:04,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:44:04,277 INFO L87 Difference]: Start difference. First operand 1300 states and 1420 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:07,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:44:07,361 INFO L93 Difference]: Finished difference Result 1891 states and 2058 transitions. [2022-07-13 01:44:07,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 01:44:07,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-13 01:44:07,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:44:07,369 INFO L225 Difference]: With dead ends: 1891 [2022-07-13 01:44:07,369 INFO L226 Difference]: Without dead ends: 1891 [2022-07-13 01:44:07,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:44:07,371 INFO L413 NwaCegarLoop]: 1055 mSDtfsCounter, 624 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:44:07,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 1758 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-13 01:44:07,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2022-07-13 01:44:07,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1504. [2022-07-13 01:44:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 863 states have (on average 2.0880648899188876) internal successors, (1802), 1483 states have internal predecessors, (1802), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-13 01:44:07,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 1836 transitions. [2022-07-13 01:44:07,426 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 1836 transitions. Word has length 3 [2022-07-13 01:44:07,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:44:07,427 INFO L495 AbstractCegarLoop]: Abstraction has 1504 states and 1836 transitions. [2022-07-13 01:44:07,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:07,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 1836 transitions. [2022-07-13 01:44:07,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-13 01:44:07,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:44:07,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:44:07,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-07-13 01:44:07,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:44:07,639 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:44:07,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:44:07,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1111693489, now seen corresponding path program 1 times [2022-07-13 01:44:07,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:44:07,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326151688] [2022-07-13 01:44:07,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:44:07,641 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:44:07,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:44:07,642 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) [2022-07-13 01:44:07,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-13 01:44:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:44:07,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 01:44:07,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:44:07,788 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 [2022-07-13 01:44:07,795 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 [2022-07-13 01:44:07,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 01:44:07,846 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 [2022-07-13 01:44:07,855 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 01:44:07,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-13 01:44:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:44:07,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:44:07,878 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:44:07,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326151688] [2022-07-13 01:44:07,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326151688] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:44:07,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:44:07,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 01:44:07,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673532671] [2022-07-13 01:44:07,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:44:07,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:44:07,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:44:07,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:44:07,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:44:07,882 INFO L87 Difference]: Start difference. First operand 1504 states and 1836 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:11,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:44:11,998 INFO L93 Difference]: Finished difference Result 2569 states and 2979 transitions. [2022-07-13 01:44:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 01:44:11,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-13 01:44:11,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:44:12,008 INFO L225 Difference]: With dead ends: 2569 [2022-07-13 01:44:12,008 INFO L226 Difference]: Without dead ends: 2569 [2022-07-13 01:44:12,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:44:12,009 INFO L413 NwaCegarLoop]: 718 mSDtfsCounter, 2002 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:44:12,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2008 Valid, 1477 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-07-13 01:44:12,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2022-07-13 01:44:12,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 1649. [2022-07-13 01:44:12,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1008 states have (on average 2.068452380952381) internal successors, (2085), 1628 states have internal predecessors, (2085), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-13 01:44:12,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2119 transitions. [2022-07-13 01:44:12,048 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2119 transitions. Word has length 8 [2022-07-13 01:44:12,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:44:12,048 INFO L495 AbstractCegarLoop]: Abstraction has 1649 states and 2119 transitions. [2022-07-13 01:44:12,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:12,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2119 transitions. [2022-07-13 01:44:12,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-13 01:44:12,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:44:12,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:44:12,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-13 01:44:12,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:44:12,260 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:44:12,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:44:12,260 INFO L85 PathProgramCache]: Analyzing trace with hash -102759776, now seen corresponding path program 1 times [2022-07-13 01:44:12,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:44:12,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085022656] [2022-07-13 01:44:12,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:44:12,261 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:44:12,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:44:12,284 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) [2022-07-13 01:44:12,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-13 01:44:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:44:12,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 01:44:12,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:44:12,480 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 [2022-07-13 01:44:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:44:12,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:44:12,515 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:44:12,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085022656] [2022-07-13 01:44:12,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085022656] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:44:12,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:44:12,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 01:44:12,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837274453] [2022-07-13 01:44:12,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:44:12,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:44:12,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:44:12,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:44:12,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:44:12,516 INFO L87 Difference]: Start difference. First operand 1649 states and 2119 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:15,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:44:15,601 INFO L93 Difference]: Finished difference Result 2811 states and 3512 transitions. [2022-07-13 01:44:15,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 01:44:15,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-13 01:44:15,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:44:15,612 INFO L225 Difference]: With dead ends: 2811 [2022-07-13 01:44:15,612 INFO L226 Difference]: Without dead ends: 2811 [2022-07-13 01:44:15,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:44:15,613 INFO L413 NwaCegarLoop]: 1321 mSDtfsCounter, 2333 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2339 SdHoareTripleChecker+Valid, 2579 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:44:15,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2339 Valid, 2579 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-13 01:44:15,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2022-07-13 01:44:15,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 1604. [2022-07-13 01:44:15,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1008 states have (on average 2.009920634920635) internal successors, (2026), 1583 states have internal predecessors, (2026), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-13 01:44:15,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2060 transitions. [2022-07-13 01:44:15,648 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2060 transitions. Word has length 9 [2022-07-13 01:44:15,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:44:15,648 INFO L495 AbstractCegarLoop]: Abstraction has 1604 states and 2060 transitions. [2022-07-13 01:44:15,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:15,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2060 transitions. [2022-07-13 01:44:15,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-13 01:44:15,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:44:15,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:44:15,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-07-13 01:44:15,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:44:15,859 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:44:15,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:44:15,859 INFO L85 PathProgramCache]: Analyzing trace with hash -102759775, now seen corresponding path program 1 times [2022-07-13 01:44:15,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:44:15,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523247587] [2022-07-13 01:44:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:44:15,860 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:44:15,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:44:15,861 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) [2022-07-13 01:44:15,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-13 01:44:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:44:15,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 01:44:15,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:44:15,991 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 [2022-07-13 01:44:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:44:16,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:44:16,033 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:44:16,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523247587] [2022-07-13 01:44:16,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523247587] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:44:16,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:44:16,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 01:44:16,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159246987] [2022-07-13 01:44:16,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:44:16,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:44:16,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:44:16,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:44:16,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:44:16,035 INFO L87 Difference]: Start difference. First operand 1604 states and 2060 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:44:19,639 INFO L93 Difference]: Finished difference Result 2440 states and 3105 transitions. [2022-07-13 01:44:19,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 01:44:19,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-13 01:44:19,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:44:19,645 INFO L225 Difference]: With dead ends: 2440 [2022-07-13 01:44:19,646 INFO L226 Difference]: Without dead ends: 2440 [2022-07-13 01:44:19,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:44:19,646 INFO L413 NwaCegarLoop]: 1513 mSDtfsCounter, 1581 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 2720 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-13 01:44:19,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1586 Valid, 2720 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-13 01:44:19,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2022-07-13 01:44:19,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1594. [2022-07-13 01:44:19,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1008 states have (on average 1.9861111111111112) internal successors, (2002), 1573 states have internal predecessors, (2002), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-13 01:44:19,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2036 transitions. [2022-07-13 01:44:19,670 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2036 transitions. Word has length 9 [2022-07-13 01:44:19,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:44:19,671 INFO L495 AbstractCegarLoop]: Abstraction has 1594 states and 2036 transitions. [2022-07-13 01:44:19,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:19,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2036 transitions. [2022-07-13 01:44:19,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 01:44:19,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:44:19,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:44:19,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-13 01:44:19,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:44:19,878 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr516ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:44:19,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:44:19,879 INFO L85 PathProgramCache]: Analyzing trace with hash -856298529, now seen corresponding path program 1 times [2022-07-13 01:44:19,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:44:19,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291225801] [2022-07-13 01:44:19,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:44:19,879 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:44:19,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:44:19,881 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) [2022-07-13 01:44:19,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-13 01:44:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:44:20,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 01:44:20,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:44:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:44:20,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:44:20,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:44:20,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291225801] [2022-07-13 01:44:20,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291225801] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:44:20,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:44:20,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 01:44:20,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796742839] [2022-07-13 01:44:20,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:44:20,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:44:20,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:44:20,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:44:20,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:44:20,055 INFO L87 Difference]: Start difference. First operand 1594 states and 2036 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:20,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:44:20,796 INFO L93 Difference]: Finished difference Result 2264 states and 2809 transitions. [2022-07-13 01:44:20,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 01:44:20,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 01:44:20,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:44:20,805 INFO L225 Difference]: With dead ends: 2264 [2022-07-13 01:44:20,805 INFO L226 Difference]: Without dead ends: 2264 [2022-07-13 01:44:20,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:44:20,808 INFO L413 NwaCegarLoop]: 1454 mSDtfsCounter, 748 mSDsluCounter, 2419 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 3873 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 01:44:20,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 3873 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 01:44:20,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2022-07-13 01:44:20,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1852. [2022-07-13 01:44:20,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1263 states have (on average 1.990498812351544) internal successors, (2514), 1828 states have internal predecessors, (2514), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-13 01:44:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 2554 transitions. [2022-07-13 01:44:20,852 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 2554 transitions. Word has length 11 [2022-07-13 01:44:20,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:44:20,852 INFO L495 AbstractCegarLoop]: Abstraction has 1852 states and 2554 transitions. [2022-07-13 01:44:20,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:20,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 2554 transitions. [2022-07-13 01:44:20,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 01:44:20,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:44:20,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:44:20,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-13 01:44:21,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:44:21,066 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:44:21,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:44:21,067 INFO L85 PathProgramCache]: Analyzing trace with hash 2126591358, now seen corresponding path program 1 times [2022-07-13 01:44:21,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:44:21,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445927259] [2022-07-13 01:44:21,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:44:21,069 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:44:21,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:44:21,070 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) [2022-07-13 01:44:21,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-13 01:44:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:44:21,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 01:44:21,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:44:21,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 01:44:21,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 01:44:21,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 01:44:21,269 INFO L356 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2022-07-13 01:44:21,269 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 3 case distinctions, treesize of input 30 treesize of output 36 [2022-07-13 01:44:21,305 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-13 01:44:21,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2022-07-13 01:44:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:44:21,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:44:21,322 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:44:21,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445927259] [2022-07-13 01:44:21,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445927259] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:44:21,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:44:21,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 01:44:21,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410012653] [2022-07-13 01:44:21,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:44:21,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:44:21,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:44:21,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:44:21,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:44:21,326 INFO L87 Difference]: Start difference. First operand 1852 states and 2554 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:22,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:44:22,753 INFO L93 Difference]: Finished difference Result 2000 states and 2409 transitions. [2022-07-13 01:44:22,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 01:44:22,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-13 01:44:22,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:44:22,759 INFO L225 Difference]: With dead ends: 2000 [2022-07-13 01:44:22,760 INFO L226 Difference]: Without dead ends: 2000 [2022-07-13 01:44:22,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:44:22,760 INFO L413 NwaCegarLoop]: 1391 mSDtfsCounter, 501 mSDsluCounter, 2482 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 3873 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 01:44:22,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 3873 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 01:44:22,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2022-07-13 01:44:22,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1494. [2022-07-13 01:44:22,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 907 states have (on average 1.9757442116868797) internal successors, (1792), 1472 states have internal predecessors, (1792), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-13 01:44:22,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1828 transitions. [2022-07-13 01:44:22,779 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1828 transitions. Word has length 14 [2022-07-13 01:44:22,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:44:22,780 INFO L495 AbstractCegarLoop]: Abstraction has 1494 states and 1828 transitions. [2022-07-13 01:44:22,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:22,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1828 transitions. [2022-07-13 01:44:22,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 01:44:22,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:44:22,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:44:22,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-13 01:44:22,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:44:22,988 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:44:22,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:44:22,989 INFO L85 PathProgramCache]: Analyzing trace with hash 769788685, now seen corresponding path program 1 times [2022-07-13 01:44:22,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:44:22,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052468221] [2022-07-13 01:44:22,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:44:22,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:44:22,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:44:22,991 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) [2022-07-13 01:44:22,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-13 01:44:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:44:23,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 01:44:23,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:44:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:44:23,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:44:23,161 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:44:23,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052468221] [2022-07-13 01:44:23,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052468221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:44:23,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:44:23,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 01:44:23,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013013130] [2022-07-13 01:44:23,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:44:23,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 01:44:23,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:44:23,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 01:44:23,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:44:23,163 INFO L87 Difference]: Start difference. First operand 1494 states and 1828 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:23,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:44:23,184 INFO L93 Difference]: Finished difference Result 1434 states and 1742 transitions. [2022-07-13 01:44:23,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 01:44:23,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-13 01:44:23,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:44:23,189 INFO L225 Difference]: With dead ends: 1434 [2022-07-13 01:44:23,189 INFO L226 Difference]: Without dead ends: 1434 [2022-07-13 01:44:23,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:44:23,189 INFO L413 NwaCegarLoop]: 1239 mSDtfsCounter, 1165 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:44:23,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1179 Valid, 1308 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 01:44:23,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2022-07-13 01:44:23,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1434. [2022-07-13 01:44:23,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 871 states have (on average 1.9586681974741675) internal successors, (1706), 1412 states have internal predecessors, (1706), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-13 01:44:23,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 1742 transitions. [2022-07-13 01:44:23,219 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 1742 transitions. Word has length 19 [2022-07-13 01:44:23,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:44:23,220 INFO L495 AbstractCegarLoop]: Abstraction has 1434 states and 1742 transitions. [2022-07-13 01:44:23,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:23,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 1742 transitions. [2022-07-13 01:44:23,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 01:44:23,221 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:44:23,221 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] [2022-07-13 01:44:23,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-07-13 01:44:23,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:44:23,432 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:44:23,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:44:23,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1032548102, now seen corresponding path program 1 times [2022-07-13 01:44:23,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:44:23,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122930180] [2022-07-13 01:44:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:44:23,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:44:23,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:44:23,448 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) [2022-07-13 01:44:23,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-13 01:44:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:44:23,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 01:44:23,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:44:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:44:23,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:44:23,647 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:44:23,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122930180] [2022-07-13 01:44:23,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122930180] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:44:23,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:44:23,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 01:44:23,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489703235] [2022-07-13 01:44:23,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:44:23,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:44:23,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:44:23,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:44:23,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:44:23,649 INFO L87 Difference]: Start difference. First operand 1434 states and 1742 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:23,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:44:23,710 INFO L93 Difference]: Finished difference Result 1406 states and 1686 transitions. [2022-07-13 01:44:23,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 01:44:23,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-13 01:44:23,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:44:23,715 INFO L225 Difference]: With dead ends: 1406 [2022-07-13 01:44:23,715 INFO L226 Difference]: Without dead ends: 1406 [2022-07-13 01:44:23,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:44:23,717 INFO L413 NwaCegarLoop]: 1194 mSDtfsCounter, 1136 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 2450 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:44:23,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1150 Valid, 2450 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 01:44:23,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2022-07-13 01:44:23,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1404. [2022-07-13 01:44:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 855 states have (on average 1.9274853801169591) internal successors, (1648), 1382 states have internal predecessors, (1648), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-13 01:44:23,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1684 transitions. [2022-07-13 01:44:23,733 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1684 transitions. Word has length 21 [2022-07-13 01:44:23,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:44:23,733 INFO L495 AbstractCegarLoop]: Abstraction has 1404 states and 1684 transitions. [2022-07-13 01:44:23,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:23,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1684 transitions. [2022-07-13 01:44:23,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 01:44:23,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:44:23,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:44:23,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-13 01:44:23,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:44:23,942 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:44:23,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:44:23,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1673308372, now seen corresponding path program 1 times [2022-07-13 01:44:23,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:44:23,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900812372] [2022-07-13 01:44:23,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:44:23,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:44:23,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:44:23,945 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) [2022-07-13 01:44:23,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-13 01:44:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:44:24,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 01:44:24,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:44:24,108 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 [2022-07-13 01:44:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:44:24,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:44:24,153 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:44:24,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900812372] [2022-07-13 01:44:24,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900812372] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:44:24,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:44:24,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 01:44:24,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796439293] [2022-07-13 01:44:24,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:44:24,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 01:44:24,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:44:24,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 01:44:24,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:44:24,155 INFO L87 Difference]: Start difference. First operand 1404 states and 1684 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:27,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:44:27,506 INFO L93 Difference]: Finished difference Result 2572 states and 3080 transitions. [2022-07-13 01:44:27,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 01:44:27,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-13 01:44:27,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:44:27,517 INFO L225 Difference]: With dead ends: 2572 [2022-07-13 01:44:27,517 INFO L226 Difference]: Without dead ends: 2572 [2022-07-13 01:44:27,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-13 01:44:27,518 INFO L413 NwaCegarLoop]: 1149 mSDtfsCounter, 2421 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 2363 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2424 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-13 01:44:27,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2424 Valid, 2737 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2363 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-13 01:44:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2022-07-13 01:44:27,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 1400. [2022-07-13 01:44:27,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 855 states have (on average 1.9181286549707601) internal successors, (1640), 1378 states have internal predecessors, (1640), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-13 01:44:27,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1676 transitions. [2022-07-13 01:44:27,540 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1676 transitions. Word has length 35 [2022-07-13 01:44:27,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:44:27,540 INFO L495 AbstractCegarLoop]: Abstraction has 1400 states and 1676 transitions. [2022-07-13 01:44:27,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:27,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1676 transitions. [2022-07-13 01:44:27,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 01:44:27,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:44:27,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:44:27,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-13 01:44:27,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:44:27,753 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:44:27,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:44:27,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1673308373, now seen corresponding path program 1 times [2022-07-13 01:44:27,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:44:27,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368619227] [2022-07-13 01:44:27,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:44:27,755 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:44:27,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:44:27,772 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) [2022-07-13 01:44:27,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-13 01:44:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:44:27,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 01:44:27,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:44:27,996 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 [2022-07-13 01:44:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:44:28,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:44:28,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:44:28,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368619227] [2022-07-13 01:44:28,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368619227] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:44:28,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:44:28,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 01:44:28,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168267875] [2022-07-13 01:44:28,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:44:28,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 01:44:28,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:44:28,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 01:44:28,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:44:28,141 INFO L87 Difference]: Start difference. First operand 1400 states and 1676 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:32,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:44:32,513 INFO L93 Difference]: Finished difference Result 2214 states and 2659 transitions. [2022-07-13 01:44:32,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 01:44:32,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-13 01:44:32,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:44:32,519 INFO L225 Difference]: With dead ends: 2214 [2022-07-13 01:44:32,520 INFO L226 Difference]: Without dead ends: 2214 [2022-07-13 01:44:32,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-13 01:44:32,525 INFO L413 NwaCegarLoop]: 1548 mSDtfsCounter, 2194 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 2142 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2194 SdHoareTripleChecker+Valid, 3317 SdHoareTripleChecker+Invalid, 2164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 01:44:32,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2194 Valid, 3317 Invalid, 2164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2142 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 01:44:32,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2022-07-13 01:44:32,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 1396. [2022-07-13 01:44:32,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 855 states have (on average 1.9087719298245613) internal successors, (1632), 1374 states have internal predecessors, (1632), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-13 01:44:32,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 1668 transitions. [2022-07-13 01:44:32,545 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 1668 transitions. Word has length 35 [2022-07-13 01:44:32,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:44:32,545 INFO L495 AbstractCegarLoop]: Abstraction has 1396 states and 1668 transitions. [2022-07-13 01:44:32,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:32,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 1668 transitions. [2022-07-13 01:44:32,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 01:44:32,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:44:32,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:44:32,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-13 01:44:32,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:44:32,757 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:44:32,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:44:32,757 INFO L85 PathProgramCache]: Analyzing trace with hash -2063645645, now seen corresponding path program 1 times [2022-07-13 01:44:32,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:44:32,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037649469] [2022-07-13 01:44:32,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:44:32,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:44:32,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:44:32,768 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) [2022-07-13 01:44:32,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-13 01:44:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:44:33,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 01:44:33,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:44:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:44:33,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:44:33,108 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:44:33,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037649469] [2022-07-13 01:44:33,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037649469] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:44:33,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:44:33,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 01:44:33,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266125920] [2022-07-13 01:44:33,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:44:33,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:44:33,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:44:33,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:44:33,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:44:33,109 INFO L87 Difference]: Start difference. First operand 1396 states and 1668 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:33,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:44:33,151 INFO L93 Difference]: Finished difference Result 1384 states and 1648 transitions. [2022-07-13 01:44:33,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 01:44:33,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-13 01:44:33,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:44:33,157 INFO L225 Difference]: With dead ends: 1384 [2022-07-13 01:44:33,157 INFO L226 Difference]: Without dead ends: 1384 [2022-07-13 01:44:33,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:44:33,158 INFO L413 NwaCegarLoop]: 1188 mSDtfsCounter, 1112 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 2428 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:44:33,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1126 Valid, 2428 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 01:44:33,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-07-13 01:44:33,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2022-07-13 01:44:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 843 states have (on average 1.9122182680901543) internal successors, (1612), 1362 states have internal predecessors, (1612), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-13 01:44:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1648 transitions. [2022-07-13 01:44:33,175 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1648 transitions. Word has length 54 [2022-07-13 01:44:33,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:44:33,175 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 1648 transitions. [2022-07-13 01:44:33,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:33,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1648 transitions. [2022-07-13 01:44:33,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 01:44:33,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:44:33,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:44:33,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-13 01:44:33,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:44:33,387 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:44:33,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:44:33,388 INFO L85 PathProgramCache]: Analyzing trace with hash -202859289, now seen corresponding path program 1 times [2022-07-13 01:44:33,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:44:33,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592685718] [2022-07-13 01:44:33,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:44:33,389 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:44:33,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:44:33,390 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) [2022-07-13 01:44:33,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-13 01:44:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:44:33,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 01:44:33,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:44:33,736 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-13 01:44:33,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 21 [2022-07-13 01:44:33,793 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-13 01:44:33,794 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 18 treesize of output 27 [2022-07-13 01:44:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:44:34,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:44:34,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:44:34,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592685718] [2022-07-13 01:44:34,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592685718] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:44:34,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:44:34,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 01:44:34,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809923056] [2022-07-13 01:44:34,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:44:34,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 01:44:34,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:44:34,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 01:44:34,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 01:44:34,100 INFO L87 Difference]: Start difference. First operand 1384 states and 1648 transitions. Second operand has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:34,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:44:34,254 INFO L93 Difference]: Finished difference Result 1394 states and 1661 transitions. [2022-07-13 01:44:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 01:44:34,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-13 01:44:34,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:44:34,269 INFO L225 Difference]: With dead ends: 1394 [2022-07-13 01:44:34,269 INFO L226 Difference]: Without dead ends: 1394 [2022-07-13 01:44:34,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-13 01:44:34,270 INFO L413 NwaCegarLoop]: 1170 mSDtfsCounter, 116 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 2457 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 556 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 01:44:34,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 2457 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 556 Unchecked, 0.1s Time] [2022-07-13 01:44:34,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2022-07-13 01:44:34,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1389. [2022-07-13 01:44:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 847 states have (on average 1.9090909090909092) internal successors, (1617), 1366 states have internal predecessors, (1617), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-13 01:44:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 1655 transitions. [2022-07-13 01:44:34,295 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 1655 transitions. Word has length 62 [2022-07-13 01:44:34,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:44:34,296 INFO L495 AbstractCegarLoop]: Abstraction has 1389 states and 1655 transitions. [2022-07-13 01:44:34,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:34,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 1655 transitions. [2022-07-13 01:44:34,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 01:44:34,300 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:44:34,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:44:34,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-13 01:44:34,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:44:34,535 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:44:34,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:44:34,536 INFO L85 PathProgramCache]: Analyzing trace with hash -202859288, now seen corresponding path program 1 times [2022-07-13 01:44:34,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:44:34,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189764176] [2022-07-13 01:44:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:44:34,537 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:44:34,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:44:34,550 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) [2022-07-13 01:44:34,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-13 01:44:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:44:34,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 01:44:34,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:44:34,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 01:44:34,930 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 [2022-07-13 01:44:34,990 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-13 01:44:34,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-13 01:44:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:44:35,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:44:35,346 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:44:35,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189764176] [2022-07-13 01:44:35,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189764176] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:44:35,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:44:35,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 01:44:35,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252960008] [2022-07-13 01:44:35,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:44:35,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 01:44:35,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:44:35,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 01:44:35,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 01:44:35,348 INFO L87 Difference]: Start difference. First operand 1389 states and 1655 transitions. Second operand has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:38,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:44:38,014 INFO L93 Difference]: Finished difference Result 1390 states and 1655 transitions. [2022-07-13 01:44:38,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 01:44:38,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-13 01:44:38,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:44:38,018 INFO L225 Difference]: With dead ends: 1390 [2022-07-13 01:44:38,018 INFO L226 Difference]: Without dead ends: 1390 [2022-07-13 01:44:38,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-13 01:44:38,019 INFO L413 NwaCegarLoop]: 1170 mSDtfsCounter, 111 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 2402 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-13 01:44:38,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 2402 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-13 01:44:38,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2022-07-13 01:44:38,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1389. [2022-07-13 01:44:38,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 847 states have (on average 1.9079102715466352) internal successors, (1616), 1366 states have internal predecessors, (1616), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-13 01:44:38,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 1654 transitions. [2022-07-13 01:44:38,036 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 1654 transitions. Word has length 62 [2022-07-13 01:44:38,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:44:38,036 INFO L495 AbstractCegarLoop]: Abstraction has 1389 states and 1654 transitions. [2022-07-13 01:44:38,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:38,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 1654 transitions. [2022-07-13 01:44:38,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-13 01:44:38,037 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:44:38,037 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:44:38,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-13 01:44:38,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:44:38,252 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:44:38,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:44:38,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1136013504, now seen corresponding path program 1 times [2022-07-13 01:44:38,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:44:38,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272535739] [2022-07-13 01:44:38,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:44:38,253 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:44:38,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:44:38,255 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) [2022-07-13 01:44:38,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-13 01:44:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:44:38,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 01:44:38,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:44:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:44:38,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:44:38,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:44:38,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272535739] [2022-07-13 01:44:38,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272535739] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:44:38,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:44:38,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 01:44:38,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566947286] [2022-07-13 01:44:38,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:44:38,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 01:44:38,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:44:38,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 01:44:38,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 01:44:38,547 INFO L87 Difference]: Start difference. First operand 1389 states and 1654 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:38,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:44:38,616 INFO L93 Difference]: Finished difference Result 1403 states and 1668 transitions. [2022-07-13 01:44:38,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 01:44:38,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-13 01:44:38,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:44:38,619 INFO L225 Difference]: With dead ends: 1403 [2022-07-13 01:44:38,619 INFO L226 Difference]: Without dead ends: 1403 [2022-07-13 01:44:38,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 01:44:38,620 INFO L413 NwaCegarLoop]: 1186 mSDtfsCounter, 19 mSDsluCounter, 4732 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 5918 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:44:38,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 5918 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 01:44:38,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2022-07-13 01:44:38,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1401. [2022-07-13 01:44:38,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 856 states have (on average 1.9018691588785046) internal successors, (1628), 1376 states have internal predecessors, (1628), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-13 01:44:38,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 1668 transitions. [2022-07-13 01:44:38,635 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 1668 transitions. Word has length 68 [2022-07-13 01:44:38,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:44:38,636 INFO L495 AbstractCegarLoop]: Abstraction has 1401 states and 1668 transitions. [2022-07-13 01:44:38,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:44:38,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 1668 transitions. [2022-07-13 01:44:38,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-13 01:44:38,637 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:44:38,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:44:38,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-13 01:44:38,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:44:38,848 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:44:38,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:44:38,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1078181117, now seen corresponding path program 1 times [2022-07-13 01:44:38,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:44:38,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688439184] [2022-07-13 01:44:38,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:44:38,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:44:38,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:44:38,852 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) [2022-07-13 01:44:38,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-13 01:44:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:44:39,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 01:44:39,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:44:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:44:39,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:44:39,196 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:44:39,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688439184] [2022-07-13 01:44:39,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688439184] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:44:39,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:44:39,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 01:44:39,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725606339] [2022-07-13 01:44:39,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:44:39,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 01:44:39,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:44:39,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 01:44:39,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 01:44:39,197 INFO L87 Difference]: Start difference. First operand 1401 states and 1668 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 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) [2022-07-13 01:44:39,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:44:39,336 INFO L93 Difference]: Finished difference Result 1407 states and 1675 transitions. [2022-07-13 01:44:39,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 01:44:39,336 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 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 68 [2022-07-13 01:44:39,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:44:39,339 INFO L225 Difference]: With dead ends: 1407 [2022-07-13 01:44:39,339 INFO L226 Difference]: Without dead ends: 1407 [2022-07-13 01:44:39,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-13 01:44:39,340 INFO L413 NwaCegarLoop]: 1185 mSDtfsCounter, 23 mSDsluCounter, 4590 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 5775 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 01:44:39,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 5775 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 01:44:39,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2022-07-13 01:44:39,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1404. [2022-07-13 01:44:39,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 858 states have (on average 1.8997668997668997) internal successors, (1630), 1378 states have internal predecessors, (1630), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-07-13 01:44:39,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1671 transitions. [2022-07-13 01:44:39,354 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1671 transitions. Word has length 68 [2022-07-13 01:44:39,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:44:39,355 INFO L495 AbstractCegarLoop]: Abstraction has 1404 states and 1671 transitions. [2022-07-13 01:44:39,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 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) [2022-07-13 01:44:39,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1671 transitions. [2022-07-13 01:44:39,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-13 01:44:39,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:44:39,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:44:39,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-13 01:44:39,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:44:39,566 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:44:39,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:44:39,567 INFO L85 PathProgramCache]: Analyzing trace with hash 396897840, now seen corresponding path program 1 times [2022-07-13 01:44:39,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:44:39,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134143177] [2022-07-13 01:44:39,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:44:39,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:44:39,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:44:39,569 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) [2022-07-13 01:44:39,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-13 01:44:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:44:39,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 01:44:39,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:44:39,939 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 [2022-07-13 01:44:40,057 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-13 01:44:40,057 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 [2022-07-13 01:44:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:44:40,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:44:40,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:44:40,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134143177] [2022-07-13 01:44:40,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134143177] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:44:40,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:44:40,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 01:44:40,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945965408] [2022-07-13 01:44:40,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:44:40,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 01:44:40,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:44:40,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 01:44:40,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 01:44:40,069 INFO L87 Difference]: Start difference. First operand 1404 states and 1671 transitions. Second operand has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 01:44:43,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:44:43,834 INFO L93 Difference]: Finished difference Result 2560 states and 3059 transitions. [2022-07-13 01:44:43,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 01:44:43,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-07-13 01:44:43,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:44:43,841 INFO L225 Difference]: With dead ends: 2560 [2022-07-13 01:44:43,841 INFO L226 Difference]: Without dead ends: 2560 [2022-07-13 01:44:43,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 01:44:43,842 INFO L413 NwaCegarLoop]: 1114 mSDtfsCounter, 1622 mSDsluCounter, 2883 mSDsCounter, 0 mSdLazyCounter, 2727 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 3997 SdHoareTripleChecker+Invalid, 3875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1127 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-13 01:44:43,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1628 Valid, 3997 Invalid, 3875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2727 Invalid, 0 Unknown, 1127 Unchecked, 3.7s Time] [2022-07-13 01:44:43,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2022-07-13 01:44:43,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 1403. [2022-07-13 01:44:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 858 states have (on average 1.8986013986013985) internal successors, (1629), 1377 states have internal predecessors, (1629), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-07-13 01:44:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1670 transitions. [2022-07-13 01:44:43,864 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1670 transitions. Word has length 73 [2022-07-13 01:44:43,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:44:43,864 INFO L495 AbstractCegarLoop]: Abstraction has 1403 states and 1670 transitions. [2022-07-13 01:44:43,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 01:44:43,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1670 transitions. [2022-07-13 01:44:43,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-13 01:44:43,865 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:44:43,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:44:43,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-07-13 01:44:44,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:44:44,077 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:44:44,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:44:44,077 INFO L85 PathProgramCache]: Analyzing trace with hash 396897841, now seen corresponding path program 1 times [2022-07-13 01:44:44,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:44:44,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778864195] [2022-07-13 01:44:44,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:44:44,078 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:44:44,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:44:44,079 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) [2022-07-13 01:44:44,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-13 01:44:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:44:44,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 01:44:44,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:44:44,537 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 [2022-07-13 01:44:44,541 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 [2022-07-13 01:44:44,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 01:44:44,882 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 [2022-07-13 01:44:44,889 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 01:44:44,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-13 01:44:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:44:44,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:44:44,910 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:44:44,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778864195] [2022-07-13 01:44:44,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778864195] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:44:44,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:44:44,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 01:44:44,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074638105] [2022-07-13 01:44:44,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:44:44,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 01:44:44,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:44:44,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 01:44:44,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 01:44:44,911 INFO L87 Difference]: Start difference. First operand 1403 states and 1670 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 01:44:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:44:51,868 INFO L93 Difference]: Finished difference Result 2630 states and 3192 transitions. [2022-07-13 01:44:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 01:44:51,868 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-07-13 01:44:51,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:44:51,873 INFO L225 Difference]: With dead ends: 2630 [2022-07-13 01:44:51,873 INFO L226 Difference]: Without dead ends: 2630 [2022-07-13 01:44:51,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 01:44:51,874 INFO L413 NwaCegarLoop]: 1319 mSDtfsCounter, 1836 mSDsluCounter, 2843 mSDsCounter, 0 mSdLazyCounter, 4881 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1842 SdHoareTripleChecker+Valid, 4162 SdHoareTripleChecker+Invalid, 6220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 4881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1309 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-07-13 01:44:51,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1842 Valid, 4162 Invalid, 6220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 4881 Invalid, 0 Unknown, 1309 Unchecked, 6.9s Time] [2022-07-13 01:44:51,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2022-07-13 01:44:51,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 1397. [2022-07-13 01:44:51,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 860 states have (on average 1.8872093023255814) internal successors, (1623), 1371 states have internal predecessors, (1623), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-07-13 01:44:51,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1664 transitions. [2022-07-13 01:44:51,916 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1664 transitions. Word has length 73 [2022-07-13 01:44:51,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:44:51,917 INFO L495 AbstractCegarLoop]: Abstraction has 1397 states and 1664 transitions. [2022-07-13 01:44:51,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 01:44:51,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1664 transitions. [2022-07-13 01:44:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-13 01:44:51,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:44:51,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:44:51,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-13 01:44:52,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:44:52,135 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting alt_bzeroErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:44:52,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:44:52,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1622258381, now seen corresponding path program 1 times [2022-07-13 01:44:52,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:44:52,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1054549129] [2022-07-13 01:44:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:44:52,137 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:44:52,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:44:52,145 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) [2022-07-13 01:44:52,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-13 01:44:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:44:52,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 01:44:52,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:44:52,476 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 [2022-07-13 01:44:52,504 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 13 treesize of output 9 [2022-07-13 01:44:52,522 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 21 treesize of output 9 [2022-07-13 01:44:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:44:52,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:44:52,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:44:52,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1054549129] [2022-07-13 01:44:52,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1054549129] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:44:52,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:44:52,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 01:44:52,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848988498] [2022-07-13 01:44:52,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:44:52,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 01:44:52,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:44:52,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 01:44:52,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 01:44:52,547 INFO L87 Difference]: Start difference. First operand 1397 states and 1664 transitions. Second operand has 8 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 01:44:56,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:44:56,066 INFO L93 Difference]: Finished difference Result 1405 states and 1672 transitions. [2022-07-13 01:44:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 01:44:56,067 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 80 [2022-07-13 01:44:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:44:56,070 INFO L225 Difference]: With dead ends: 1405 [2022-07-13 01:44:56,070 INFO L226 Difference]: Without dead ends: 1405 [2022-07-13 01:44:56,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-13 01:44:56,071 INFO L413 NwaCegarLoop]: 1171 mSDtfsCounter, 23 mSDsluCounter, 3760 mSDsCounter, 0 mSdLazyCounter, 3317 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4931 SdHoareTripleChecker+Invalid, 3319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-13 01:44:56,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 4931 Invalid, 3319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3317 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-13 01:44:56,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2022-07-13 01:44:56,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1404. [2022-07-13 01:44:56,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 866 states have (on average 1.8833718244803694) internal successors, (1631), 1377 states have internal predecessors, (1631), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-07-13 01:44:56,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1672 transitions. [2022-07-13 01:44:56,086 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1672 transitions. Word has length 80 [2022-07-13 01:44:56,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:44:56,086 INFO L495 AbstractCegarLoop]: Abstraction has 1404 states and 1672 transitions. [2022-07-13 01:44:56,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 01:44:56,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1672 transitions. [2022-07-13 01:44:56,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-13 01:44:56,087 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:44:56,088 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:44:56,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-13 01:44:56,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:44:56,301 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting alt_bzeroErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:44:56,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:44:56,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1249597809, now seen corresponding path program 1 times [2022-07-13 01:44:56,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:44:56,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1984405694] [2022-07-13 01:44:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:44:56,302 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:44:56,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:44:56,303 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) [2022-07-13 01:44:56,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-13 01:44:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:44:56,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 01:44:56,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:44:56,637 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 [2022-07-13 01:44:56,662 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 13 treesize of output 9 [2022-07-13 01:44:56,671 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 13 treesize of output 9 [2022-07-13 01:44:56,710 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 21 treesize of output 9 [2022-07-13 01:44:56,712 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 19 treesize of output 7 [2022-07-13 01:44:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:44:56,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:44:56,776 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:44:56,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1984405694] [2022-07-13 01:44:56,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1984405694] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:44:56,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:44:56,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 01:44:56,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413669912] [2022-07-13 01:44:56,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:44:56,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 01:44:56,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:44:56,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 01:44:56,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-13 01:44:56,778 INFO L87 Difference]: Start difference. First operand 1404 states and 1672 transitions. Second operand has 9 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 01:45:02,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:45:02,038 INFO L93 Difference]: Finished difference Result 1404 states and 1671 transitions. [2022-07-13 01:45:02,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 01:45:02,039 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 81 [2022-07-13 01:45:02,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:45:02,041 INFO L225 Difference]: With dead ends: 1404 [2022-07-13 01:45:02,041 INFO L226 Difference]: Without dead ends: 1404 [2022-07-13 01:45:02,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-13 01:45:02,042 INFO L413 NwaCegarLoop]: 1166 mSDtfsCounter, 19 mSDsluCounter, 4783 mSDsCounter, 0 mSdLazyCounter, 3477 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 5949 SdHoareTripleChecker+Invalid, 3478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-07-13 01:45:02,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 5949 Invalid, 3478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3477 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-07-13 01:45:02,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-07-13 01:45:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1404. [2022-07-13 01:45:02,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 866 states have (on average 1.882217090069284) internal successors, (1630), 1377 states have internal predecessors, (1630), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-07-13 01:45:02,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1671 transitions. [2022-07-13 01:45:02,057 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1671 transitions. Word has length 81 [2022-07-13 01:45:02,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:45:02,057 INFO L495 AbstractCegarLoop]: Abstraction has 1404 states and 1671 transitions. [2022-07-13 01:45:02,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 01:45:02,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1671 transitions. [2022-07-13 01:45:02,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-13 01:45:02,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:45:02,058 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:45:02,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-13 01:45:02,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:45:02,270 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:45:02,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:45:02,270 INFO L85 PathProgramCache]: Analyzing trace with hash -63374884, now seen corresponding path program 1 times [2022-07-13 01:45:02,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:45:02,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521489913] [2022-07-13 01:45:02,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:45:02,271 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:45:02,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:45:02,312 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) [2022-07-13 01:45:02,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-13 01:45:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:45:02,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 01:45:02,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:45:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:45:02,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:45:02,692 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:45:02,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521489913] [2022-07-13 01:45:02,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521489913] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:45:02,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:45:02,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 01:45:02,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844829567] [2022-07-13 01:45:02,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:45:02,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 01:45:02,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:45:02,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 01:45:02,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:45:02,693 INFO L87 Difference]: Start difference. First operand 1404 states and 1671 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 01:45:02,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:45:02,775 INFO L93 Difference]: Finished difference Result 1412 states and 1680 transitions. [2022-07-13 01:45:02,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 01:45:02,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 88 [2022-07-13 01:45:02,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:45:02,779 INFO L225 Difference]: With dead ends: 1412 [2022-07-13 01:45:02,779 INFO L226 Difference]: Without dead ends: 1409 [2022-07-13 01:45:02,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 01:45:02,780 INFO L413 NwaCegarLoop]: 1174 mSDtfsCounter, 13 mSDsluCounter, 2340 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3514 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:45:02,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3514 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 01:45:02,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2022-07-13 01:45:02,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1409. [2022-07-13 01:45:02,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 870 states have (on average 1.8793103448275863) internal successors, (1635), 1382 states have internal predecessors, (1635), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-13 01:45:02,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 1677 transitions. [2022-07-13 01:45:02,795 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 1677 transitions. Word has length 88 [2022-07-13 01:45:02,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:45:02,796 INFO L495 AbstractCegarLoop]: Abstraction has 1409 states and 1677 transitions. [2022-07-13 01:45:02,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 01:45:02,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 1677 transitions. [2022-07-13 01:45:02,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-13 01:45:02,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:45:02,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:45:02,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-13 01:45:03,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:45:03,011 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:45:03,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:45:03,012 INFO L85 PathProgramCache]: Analyzing trace with hash -407790698, now seen corresponding path program 1 times [2022-07-13 01:45:03,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:45:03,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167968276] [2022-07-13 01:45:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:45:03,013 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:45:03,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:45:03,020 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 01:45:03,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-13 01:45:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:45:03,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 01:45:03,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:45:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:45:03,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 01:45:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:45:03,590 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:45:03,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167968276] [2022-07-13 01:45:03,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167968276] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 01:45:03,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 01:45:03,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-13 01:45:03,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046822941] [2022-07-13 01:45:03,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 01:45:03,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 01:45:03,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:45:03,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 01:45:03,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-13 01:45:03,592 INFO L87 Difference]: Start difference. First operand 1409 states and 1677 transitions. Second operand has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 01:45:03,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:45:03,794 INFO L93 Difference]: Finished difference Result 1422 states and 1692 transitions. [2022-07-13 01:45:03,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 01:45:03,795 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 89 [2022-07-13 01:45:03,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:45:03,798 INFO L225 Difference]: With dead ends: 1422 [2022-07-13 01:45:03,799 INFO L226 Difference]: Without dead ends: 1416 [2022-07-13 01:45:03,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2022-07-13 01:45:03,799 INFO L413 NwaCegarLoop]: 1177 mSDtfsCounter, 44 mSDsluCounter, 3523 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 4700 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 01:45:03,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 4700 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 01:45:03,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2022-07-13 01:45:03,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1413. [2022-07-13 01:45:03,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 874 states have (on average 1.8764302059496567) internal successors, (1640), 1386 states have internal predecessors, (1640), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-13 01:45:03,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 1682 transitions. [2022-07-13 01:45:03,817 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 1682 transitions. Word has length 89 [2022-07-13 01:45:03,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:45:03,818 INFO L495 AbstractCegarLoop]: Abstraction has 1413 states and 1682 transitions. [2022-07-13 01:45:03,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 01:45:03,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 1682 transitions. [2022-07-13 01:45:03,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-13 01:45:03,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:45:03,819 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:45:03,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-07-13 01:45:04,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:45:04,034 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:45:04,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:45:04,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1714460764, now seen corresponding path program 2 times [2022-07-13 01:45:04,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:45:04,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627214691] [2022-07-13 01:45:04,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 01:45:04,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:45:04,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:45:04,037 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 01:45:04,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-13 01:45:04,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 01:45:04,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 01:45:04,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 01:45:04,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:45:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:45:04,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 01:45:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:45:05,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:45:05,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627214691] [2022-07-13 01:45:05,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627214691] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 01:45:05,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 01:45:05,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-13 01:45:05,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740537294] [2022-07-13 01:45:05,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 01:45:05,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 01:45:05,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:45:05,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 01:45:05,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-07-13 01:45:05,038 INFO L87 Difference]: Start difference. First operand 1413 states and 1682 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 01:45:05,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:45:05,684 INFO L93 Difference]: Finished difference Result 1440 states and 1716 transitions. [2022-07-13 01:45:05,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 01:45:05,685 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 92 [2022-07-13 01:45:05,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:45:05,688 INFO L225 Difference]: With dead ends: 1440 [2022-07-13 01:45:05,689 INFO L226 Difference]: Without dead ends: 1434 [2022-07-13 01:45:05,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=649, Unknown=0, NotChecked=0, Total=992 [2022-07-13 01:45:05,690 INFO L413 NwaCegarLoop]: 1183 mSDtfsCounter, 79 mSDsluCounter, 8233 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 9416 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 01:45:05,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 9416 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 01:45:05,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2022-07-13 01:45:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1422. [2022-07-13 01:45:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 883 states have (on average 1.870894677236693) internal successors, (1652), 1395 states have internal predecessors, (1652), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-13 01:45:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 1694 transitions. [2022-07-13 01:45:05,714 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 1694 transitions. Word has length 92 [2022-07-13 01:45:05,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:45:05,714 INFO L495 AbstractCegarLoop]: Abstraction has 1422 states and 1694 transitions. [2022-07-13 01:45:05,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 01:45:05,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 1694 transitions. [2022-07-13 01:45:05,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-13 01:45:05,715 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:45:05,716 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:45:05,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-13 01:45:05,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:45:05,929 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:45:05,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:45:05,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1774326244, now seen corresponding path program 3 times [2022-07-13 01:45:05,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:45:05,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825456522] [2022-07-13 01:45:05,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 01:45:05,930 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:45:05,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:45:05,932 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 01:45:05,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-13 01:45:06,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-13 01:45:06,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 01:45:06,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 01:45:06,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:45:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:45:07,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 01:45:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:45:07,877 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:45:07,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825456522] [2022-07-13 01:45:07,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825456522] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 01:45:07,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 01:45:07,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-07-13 01:45:07,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144000702] [2022-07-13 01:45:07,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 01:45:07,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-13 01:45:07,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:45:07,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-13 01:45:07,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-07-13 01:45:07,879 INFO L87 Difference]: Start difference. First operand 1422 states and 1694 transitions. Second operand has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 28 states have internal predecessors, (108), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 01:45:11,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:45:11,194 INFO L93 Difference]: Finished difference Result 1476 states and 1768 transitions. [2022-07-13 01:45:11,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-13 01:45:11,195 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 28 states have internal predecessors, (108), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 98 [2022-07-13 01:45:11,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:45:11,197 INFO L225 Difference]: With dead ends: 1476 [2022-07-13 01:45:11,198 INFO L226 Difference]: Without dead ends: 1467 [2022-07-13 01:45:11,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=924, Invalid=1832, Unknown=0, NotChecked=0, Total=2756 [2022-07-13 01:45:11,199 INFO L413 NwaCegarLoop]: 1195 mSDtfsCounter, 183 mSDsluCounter, 20109 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 21304 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 01:45:11,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 21304 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 01:45:11,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-07-13 01:45:11,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1440. [2022-07-13 01:45:11,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 901 states have (on average 1.8590455049944505) internal successors, (1675), 1413 states have internal predecessors, (1675), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-13 01:45:11,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 1717 transitions. [2022-07-13 01:45:11,214 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 1717 transitions. Word has length 98 [2022-07-13 01:45:11,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:45:11,215 INFO L495 AbstractCegarLoop]: Abstraction has 1440 states and 1717 transitions. [2022-07-13 01:45:11,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 28 states have internal predecessors, (108), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 01:45:11,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 1717 transitions. [2022-07-13 01:45:11,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-13 01:45:11,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:45:11,216 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:45:11,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-07-13 01:45:11,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:45:11,446 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:45:11,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:45:11,446 INFO L85 PathProgramCache]: Analyzing trace with hash -824268388, now seen corresponding path program 4 times [2022-07-13 01:45:11,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:45:11,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061842786] [2022-07-13 01:45:11,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 01:45:11,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:45:11,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:45:11,448 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 01:45:11,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-13 01:45:11,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 01:45:11,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 01:45:11,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-13 01:45:11,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:45:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:45:12,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 01:45:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:45:14,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:45:14,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061842786] [2022-07-13 01:45:14,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061842786] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 01:45:14,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 01:45:14,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-07-13 01:45:14,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122584003] [2022-07-13 01:45:14,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 01:45:14,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-13 01:45:14,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:45:14,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-13 01:45:14,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=1927, Unknown=0, NotChecked=0, Total=2652 [2022-07-13 01:45:14,165 INFO L87 Difference]: Start difference. First operand 1440 states and 1717 transitions. Second operand has 52 states, 52 states have (on average 2.5384615384615383) internal successors, (132), 52 states have internal predecessors, (132), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 01:45:23,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:45:23,002 INFO L93 Difference]: Finished difference Result 1543 states and 1852 transitions. [2022-07-13 01:45:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-13 01:45:23,003 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.5384615384615383) internal successors, (132), 52 states have internal predecessors, (132), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 110 [2022-07-13 01:45:23,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:45:23,005 INFO L225 Difference]: With dead ends: 1543 [2022-07-13 01:45:23,005 INFO L226 Difference]: Without dead ends: 1537 [2022-07-13 01:45:23,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=4121, Invalid=9921, Unknown=0, NotChecked=0, Total=14042 [2022-07-13 01:45:23,008 INFO L413 NwaCegarLoop]: 1217 mSDtfsCounter, 425 mSDsluCounter, 30240 mSDsCounter, 0 mSdLazyCounter, 2449 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 31457 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 2449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-13 01:45:23,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 31457 Invalid, 2904 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [455 Valid, 2449 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-13 01:45:23,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2022-07-13 01:45:23,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1474. [2022-07-13 01:45:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 935 states have (on average 1.8406417112299465) internal successors, (1721), 1447 states have internal predecessors, (1721), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-13 01:45:23,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 1763 transitions. [2022-07-13 01:45:23,021 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 1763 transitions. Word has length 110 [2022-07-13 01:45:23,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:45:23,021 INFO L495 AbstractCegarLoop]: Abstraction has 1474 states and 1763 transitions. [2022-07-13 01:45:23,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.5384615384615383) internal successors, (132), 52 states have internal predecessors, (132), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 01:45:23,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 1763 transitions. [2022-07-13 01:45:23,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-13 01:45:23,023 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:45:23,023 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:45:23,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-07-13 01:45:23,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:45:23,236 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:45:23,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:45:23,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1958349148, now seen corresponding path program 5 times [2022-07-13 01:45:23,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:45:23,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265726299] [2022-07-13 01:45:23,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 01:45:23,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:45:23,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:45:23,238 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 01:45:23,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-13 01:45:24,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-13 01:45:24,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 01:45:24,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-13 01:45:24,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:45:24,837 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 [2022-07-13 01:45:24,952 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-13 01:45:24,952 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 [2022-07-13 01:45:24,976 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 13 treesize of output 9 [2022-07-13 01:45:25,047 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 22 treesize of output 10 [2022-07-13 01:45:26,631 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-13 01:45:26,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-13 01:45:26,659 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 31 treesize of output 13 [2022-07-13 01:45:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-07-13 01:45:26,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 01:45:26,933 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2663 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_2663) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))))) is different from false [2022-07-13 01:45:26,935 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:45:26,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265726299] [2022-07-13 01:45:26,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265726299] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 01:45:26,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [626617357] [2022-07-13 01:45:26,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 01:45:26,936 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-13 01:45:26,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-13 01:45:26,938 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-13 01:45:26,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-07-13 01:47:01,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-13 01:47:01,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 01:47:01,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-13 01:47:01,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:47:01,893 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 [2022-07-13 01:47:01,971 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-13 01:47:01,972 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 [2022-07-13 01:47:01,981 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 13 treesize of output 9 [2022-07-13 01:47:02,023 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 22 treesize of output 10 [2022-07-13 01:47:03,399 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-13 01:47:03,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-13 01:47:03,428 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 31 treesize of output 13 [2022-07-13 01:47:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-07-13 01:47:03,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 01:47:03,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [626617357] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 01:47:03,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 01:47:03,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2022-07-13 01:47:03,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307031616] [2022-07-13 01:47:03,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 01:47:03,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 01:47:03,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:47:03,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 01:47:03,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=215, Unknown=18, NotChecked=30, Total=306 [2022-07-13 01:47:03,692 INFO L87 Difference]: Start difference. First operand 1474 states and 1763 transitions. Second operand has 14 states, 12 states have (on average 7.083333333333333) internal successors, (85), 12 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 01:47:09,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:47:09,943 INFO L93 Difference]: Finished difference Result 2790 states and 3320 transitions. [2022-07-13 01:47:09,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 01:47:09,944 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 7.083333333333333) internal successors, (85), 12 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 132 [2022-07-13 01:47:09,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:47:09,947 INFO L225 Difference]: With dead ends: 2790 [2022-07-13 01:47:09,947 INFO L226 Difference]: Without dead ends: 2790 [2022-07-13 01:47:09,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 165 SyntacticMatches, 90 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=97, Invalid=480, Unknown=27, NotChecked=46, Total=650 [2022-07-13 01:47:09,948 INFO L413 NwaCegarLoop]: 1167 mSDtfsCounter, 1803 mSDsluCounter, 9406 mSDsCounter, 0 mSdLazyCounter, 6051 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1808 SdHoareTripleChecker+Valid, 10573 SdHoareTripleChecker+Invalid, 13108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 6051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7023 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:47:09,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1808 Valid, 10573 Invalid, 13108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 6051 Invalid, 0 Unknown, 7023 Unchecked, 6.0s Time] [2022-07-13 01:47:09,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2022-07-13 01:47:09,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 1471. [2022-07-13 01:47:09,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 935 states have (on average 1.8374331550802139) internal successors, (1718), 1444 states have internal predecessors, (1718), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-13 01:47:09,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 1760 transitions. [2022-07-13 01:47:09,962 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 1760 transitions. Word has length 132 [2022-07-13 01:47:09,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:47:09,962 INFO L495 AbstractCegarLoop]: Abstraction has 1471 states and 1760 transitions. [2022-07-13 01:47:09,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 7.083333333333333) internal successors, (85), 12 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 01:47:09,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 1760 transitions. [2022-07-13 01:47:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-13 01:47:09,963 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:47:09,963 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:47:09,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-07-13 01:47:10,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-13 01:47:10,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:47:10,391 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-13 01:47:10,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:47:10,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1958349149, now seen corresponding path program 1 times [2022-07-13 01:47:10,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:47:10,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724266291] [2022-07-13 01:47:10,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:47:10,393 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:47:10,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:47:10,394 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 01:47:10,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-13 01:47:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:47:11,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-13 01:47:11,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:47:11,265 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 [2022-07-13 01:47:11,459 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 [2022-07-13 01:47:11,487 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 01:47:11,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-13 01:47:11,507 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 13 treesize of output 9 [2022-07-13 01:47:11,511 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 13 treesize of output 9 [2022-07-13 01:47:11,592 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 18 treesize of output 10 [2022-07-13 01:47:11,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-13 01:47:12,831 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3621 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_alt_bzero_#in~a#1.base| v_ArrVal_3621))) (exists ((v_ArrVal_3620 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_alt_bzero_#in~a#1.base| v_ArrVal_3620) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_31 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_31)))) is different from true [2022-07-13 01:47:12,864 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-13 01:47:12,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-07-13 01:47:12,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-13 01:47:12,906 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 25 treesize of output 13 [2022-07-13 01:47:12,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-13 01:47:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 903 trivial. 44 not checked. [2022-07-13 01:47:12,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 01:47:13,637 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3713 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3712 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_3712) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_3713) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0))))) (forall ((v_ArrVal_3712 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_3712) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|)))) (bvule (bvadd (_ bv16 32) .cse1) (bvadd .cse1 (_ bv20 32)))))) is different from false [2022-07-13 01:47:13,642 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:47:13,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724266291] [2022-07-13 01:47:13,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724266291] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 01:47:13,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [59454267] [2022-07-13 01:47:13,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:47:13,643 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-13 01:47:13,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-13 01:47:13,645 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-13 01:47:13,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process