./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02acfb70bf31515ceb84abad2b1306b0eab86ac3ab86c4ec829443e87c9da071 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 21:04:38,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 21:04:38,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 21:04:38,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 21:04:38,699 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 21:04:38,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 21:04:38,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 21:04:38,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 21:04:38,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 21:04:38,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 21:04:38,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 21:04:38,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 21:04:38,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 21:04:38,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 21:04:38,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 21:04:38,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 21:04:38,723 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 21:04:38,724 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 21:04:38,726 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 21:04:38,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 21:04:38,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 21:04:38,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 21:04:38,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 21:04:38,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 21:04:38,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 21:04:38,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 21:04:38,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 21:04:38,743 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 21:04:38,743 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 21:04:38,744 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 21:04:38,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 21:04:38,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 21:04:38,746 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 21:04:38,747 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 21:04:38,748 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 21:04:38,748 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 21:04:38,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 21:04:38,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 21:04:38,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 21:04:38,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 21:04:38,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 21:04:38,753 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 21:04:38,788 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 21:04:38,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 21:04:38,789 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 21:04:38,789 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 21:04:38,790 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 21:04:38,790 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 21:04:38,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 21:04:38,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 21:04:38,791 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 21:04:38,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 21:04:38,792 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 21:04:38,792 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 21:04:38,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 21:04:38,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 21:04:38,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 21:04:38,793 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 21:04:38,793 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 21:04:38,793 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 21:04:38,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 21:04:38,794 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 21:04:38,794 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 21:04:38,794 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 21:04:38,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 21:04:38,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 21:04:38,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 21:04:38,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:04:38,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 21:04:38,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 21:04:38,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 21:04:38,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 21:04:38,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 21:04:38,797 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02acfb70bf31515ceb84abad2b1306b0eab86ac3ab86c4ec829443e87c9da071 [2021-12-18 21:04:39,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 21:04:39,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 21:04:39,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 21:04:39,051 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 21:04:39,052 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 21:04:39,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i [2021-12-18 21:04:39,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1e020ba2/9d30539ce5a948c082620d516718ae69/FLAG2f7c6aa60 [2021-12-18 21:04:39,585 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 21:04:39,586 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i [2021-12-18 21:04:39,604 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1e020ba2/9d30539ce5a948c082620d516718ae69/FLAG2f7c6aa60 [2021-12-18 21:04:39,620 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1e020ba2/9d30539ce5a948c082620d516718ae69 [2021-12-18 21:04:39,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 21:04:39,624 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 21:04:39,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 21:04:39,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 21:04:39,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 21:04:39,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:04:39" (1/1) ... [2021-12-18 21:04:39,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dcfa8b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:39, skipping insertion in model container [2021-12-18 21:04:39,632 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:04:39" (1/1) ... [2021-12-18 21:04:39,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 21:04:39,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:04:40,057 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:04:40,071 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-18 21:04:40,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@462f76dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:40, skipping insertion in model container [2021-12-18 21:04:40,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 21:04:40,072 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-18 21:04:40,075 INFO L158 Benchmark]: Toolchain (without parser) took 448.99ms. Allocated memory is still 115.3MB. Free memory was 77.1MB in the beginning and 83.8MB in the end (delta: -6.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-18 21:04:40,076 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 115.3MB. Free memory was 87.0MB in the beginning and 87.0MB in the end (delta: 25.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 21:04:40,077 INFO L158 Benchmark]: CACSL2BoogieTranslator took 445.53ms. Allocated memory is still 115.3MB. Free memory was 76.9MB in the beginning and 83.8MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-18 21:04:40,079 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 115.3MB. Free memory was 87.0MB in the beginning and 87.0MB in the end (delta: 25.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 445.53ms. Allocated memory is still 115.3MB. Free memory was 76.9MB in the beginning and 83.8MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02acfb70bf31515ceb84abad2b1306b0eab86ac3ab86c4ec829443e87c9da071 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 21:04:41,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 21:04:41,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 21:04:41,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 21:04:41,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 21:04:41,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 21:04:41,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 21:04:41,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 21:04:41,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 21:04:41,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 21:04:41,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 21:04:41,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 21:04:41,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 21:04:41,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 21:04:41,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 21:04:41,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 21:04:41,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 21:04:41,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 21:04:41,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 21:04:41,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 21:04:41,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 21:04:41,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 21:04:41,803 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 21:04:41,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 21:04:41,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 21:04:41,808 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 21:04:41,808 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 21:04:41,809 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 21:04:41,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 21:04:41,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 21:04:41,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 21:04:41,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 21:04:41,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 21:04:41,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 21:04:41,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 21:04:41,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 21:04:41,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 21:04:41,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 21:04:41,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 21:04:41,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 21:04:41,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 21:04:41,818 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-18 21:04:41,848 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 21:04:41,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 21:04:41,849 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 21:04:41,850 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 21:04:41,851 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 21:04:41,851 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 21:04:41,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 21:04:41,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 21:04:41,852 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 21:04:41,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 21:04:41,853 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 21:04:41,853 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 21:04:41,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 21:04:41,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 21:04:41,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 21:04:41,854 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 21:04:41,854 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 21:04:41,854 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 21:04:41,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 21:04:41,855 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 21:04:41,855 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-18 21:04:41,855 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-18 21:04:41,855 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 21:04:41,855 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 21:04:41,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 21:04:41,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 21:04:41,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 21:04:41,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:04:41,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 21:04:41,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 21:04:41,857 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-18 21:04:41,857 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-18 21:04:41,857 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 21:04:41,857 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-18 21:04:41,858 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02acfb70bf31515ceb84abad2b1306b0eab86ac3ab86c4ec829443e87c9da071 [2021-12-18 21:04:42,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 21:04:42,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 21:04:42,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 21:04:42,185 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 21:04:42,186 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 21:04:42,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i [2021-12-18 21:04:42,245 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a659a33e/ee59490df5244d509454218e833af2da/FLAG3ba0ea2c4 [2021-12-18 21:04:42,724 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 21:04:42,725 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i [2021-12-18 21:04:42,739 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a659a33e/ee59490df5244d509454218e833af2da/FLAG3ba0ea2c4 [2021-12-18 21:04:42,753 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a659a33e/ee59490df5244d509454218e833af2da [2021-12-18 21:04:42,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 21:04:42,756 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 21:04:42,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 21:04:42,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 21:04:42,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 21:04:42,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:04:42" (1/1) ... [2021-12-18 21:04:42,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49010328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:42, skipping insertion in model container [2021-12-18 21:04:42,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:04:42" (1/1) ... [2021-12-18 21:04:42,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 21:04:42,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:04:43,148 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:04:43,164 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-18 21:04:43,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:04:43,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:04:43,243 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 21:04:43,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:04:43,359 INFO L208 MainTranslator]: Completed translation [2021-12-18 21:04:43,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:43 WrapperNode [2021-12-18 21:04:43,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 21:04:43,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 21:04:43,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 21:04:43,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 21:04:43,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:43" (1/1) ... [2021-12-18 21:04:43,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:43" (1/1) ... [2021-12-18 21:04:43,434 INFO L137 Inliner]: procedures = 169, calls = 88, calls flagged for inlining = 26, calls inlined = 8, statements flattened = 96 [2021-12-18 21:04:43,434 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 21:04:43,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 21:04:43,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 21:04:43,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 21:04:43,442 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:43" (1/1) ... [2021-12-18 21:04:43,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:43" (1/1) ... [2021-12-18 21:04:43,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:43" (1/1) ... [2021-12-18 21:04:43,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:43" (1/1) ... [2021-12-18 21:04:43,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:43" (1/1) ... [2021-12-18 21:04:43,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:43" (1/1) ... [2021-12-18 21:04:43,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:43" (1/1) ... [2021-12-18 21:04:43,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 21:04:43,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 21:04:43,492 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 21:04:43,492 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 21:04:43,493 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:43" (1/1) ... [2021-12-18 21:04:43,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:04:43,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:04:43,520 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 21:04:43,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 21:04:43,571 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-18 21:04:43,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-18 21:04:43,571 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_i2c_set_clientdata [2021-12-18 21:04:43,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_i2c_set_clientdata [2021-12-18 21:04:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 21:04:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 21:04:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 21:04:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 21:04:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 21:04:43,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 21:04:43,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 21:04:43,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 21:04:43,744 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 21:04:43,745 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 21:04:44,048 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 21:04:44,053 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 21:04:44,053 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-18 21:04:44,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:04:44 BoogieIcfgContainer [2021-12-18 21:04:44,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 21:04:44,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 21:04:44,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 21:04:44,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 21:04:44,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 09:04:42" (1/3) ... [2021-12-18 21:04:44,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ab0093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:04:44, skipping insertion in model container [2021-12-18 21:04:44,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:43" (2/3) ... [2021-12-18 21:04:44,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ab0093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:04:44, skipping insertion in model container [2021-12-18 21:04:44,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:04:44" (3/3) ... [2021-12-18 21:04:44,061 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test11_1.i [2021-12-18 21:04:44,065 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 21:04:44,066 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2021-12-18 21:04:44,109 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 21:04:44,114 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 21:04:44,114 INFO L340 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2021-12-18 21:04:44,128 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 51 states have (on average 1.7058823529411764) internal successors, (87), 81 states have internal predecessors, (87), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:04:44,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 21:04:44,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:44,135 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:44,135 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:04:44,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:44,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2113619829, now seen corresponding path program 1 times [2021-12-18 21:04:44,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:44,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110564802] [2021-12-18 21:04:44,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:44,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:44,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:44,152 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:44,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-18 21:04:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:44,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:04:44,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:04:44,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:04:44,338 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:44,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110564802] [2021-12-18 21:04:44,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110564802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:04:44,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:04:44,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:04:44,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959660957] [2021-12-18 21:04:44,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:04:44,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:04:44,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:44,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:04:44,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:04:44,372 INFO L87 Difference]: Start difference. First operand has 90 states, 51 states have (on average 1.7058823529411764) internal successors, (87), 81 states have internal predecessors, (87), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-12-18 21:04:44,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:44,473 INFO L93 Difference]: Finished difference Result 167 states and 191 transitions. [2021-12-18 21:04:44,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:04:44,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 11 [2021-12-18 21:04:44,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:44,484 INFO L225 Difference]: With dead ends: 167 [2021-12-18 21:04:44,484 INFO L226 Difference]: Without dead ends: 163 [2021-12-18 21:04:44,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:04:44,489 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 73 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:44,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 485 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:04:44,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-18 21:04:44,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 92. [2021-12-18 21:04:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 82 states have internal predecessors, (88), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-18 21:04:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2021-12-18 21:04:44,528 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 11 [2021-12-18 21:04:44,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:44,528 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2021-12-18 21:04:44,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-12-18 21:04:44,529 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2021-12-18 21:04:44,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 21:04:44,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:44,530 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:44,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-18 21:04:44,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:44,731 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:04:44,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:44,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1293843786, now seen corresponding path program 1 times [2021-12-18 21:04:44,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:44,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316494232] [2021-12-18 21:04:44,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:44,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:44,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:44,736 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:44,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-18 21:04:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:44,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:04:44,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:04:44,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:04:44,817 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:44,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316494232] [2021-12-18 21:04:44,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316494232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:04:44,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:04:44,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 21:04:44,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067307616] [2021-12-18 21:04:44,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:04:44,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:04:44,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:44,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:04:44,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:04:44,821 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-12-18 21:04:45,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:45,036 INFO L93 Difference]: Finished difference Result 163 states and 186 transitions. [2021-12-18 21:04:45,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 21:04:45,037 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), 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 11 [2021-12-18 21:04:45,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:45,039 INFO L225 Difference]: With dead ends: 163 [2021-12-18 21:04:45,039 INFO L226 Difference]: Without dead ends: 161 [2021-12-18 21:04:45,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:04:45,041 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 70 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:45,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 321 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:04:45,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-18 21:04:45,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 88. [2021-12-18 21:04:45,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 50 states have (on average 1.68) internal successors, (84), 79 states have internal predecessors, (84), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:04:45,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-12-18 21:04:45,054 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 11 [2021-12-18 21:04:45,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:45,054 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-12-18 21:04:45,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-12-18 21:04:45,054 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-12-18 21:04:45,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 21:04:45,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:45,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:45,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:45,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:45,264 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:04:45,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:45,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1793026591, now seen corresponding path program 1 times [2021-12-18 21:04:45,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:45,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177147249] [2021-12-18 21:04:45,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:45,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:45,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:45,267 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:45,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-18 21:04:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:45,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:04:45,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:04:45,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:04:45,391 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:45,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177147249] [2021-12-18 21:04:45,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177147249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:04:45,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:04:45,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:04:45,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139356909] [2021-12-18 21:04:45,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:04:45,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:04:45,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:45,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:04:45,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:04:45,402 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 21:04:45,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:45,480 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2021-12-18 21:04:45,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:04:45,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-12-18 21:04:45,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:45,485 INFO L225 Difference]: With dead ends: 160 [2021-12-18 21:04:45,485 INFO L226 Difference]: Without dead ends: 160 [2021-12-18 21:04:45,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:04:45,487 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 68 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:45,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 375 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:04:45,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-18 21:04:45,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 92. [2021-12-18 21:04:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 82 states have internal predecessors, (87), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-18 21:04:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2021-12-18 21:04:45,497 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 17 [2021-12-18 21:04:45,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:45,497 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2021-12-18 21:04:45,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 21:04:45,498 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2021-12-18 21:04:45,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 21:04:45,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:45,498 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:45,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:45,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:45,699 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:04:45,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:45,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1793026607, now seen corresponding path program 1 times [2021-12-18 21:04:45,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:45,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945245615] [2021-12-18 21:04:45,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:45,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:45,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:45,702 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:45,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-18 21:04:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:45,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 21:04:45,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:45,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:04:45,950 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:04:45,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 21:04:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:04:45,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:04:46,175 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:46,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945245615] [2021-12-18 21:04:46,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945245615] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:04:46,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:04:46,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-12-18 21:04:46,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090204189] [2021-12-18 21:04:46,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:04:46,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:04:46,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:46,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:04:46,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:04:46,178 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:04:46,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:46,349 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2021-12-18 21:04:46,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:04:46,350 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 17 [2021-12-18 21:04:46,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:46,351 INFO L225 Difference]: With dead ends: 112 [2021-12-18 21:04:46,351 INFO L226 Difference]: Without dead ends: 112 [2021-12-18 21:04:46,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:04:46,352 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 10 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:46,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 326 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 133 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2021-12-18 21:04:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-18 21:04:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2021-12-18 21:04:46,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 67 states have (on average 1.5820895522388059) internal successors, (106), 95 states have internal predecessors, (106), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-18 21:04:46,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2021-12-18 21:04:46,375 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 17 [2021-12-18 21:04:46,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:46,376 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2021-12-18 21:04:46,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:04:46,378 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2021-12-18 21:04:46,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 21:04:46,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:46,378 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:46,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:46,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:46,590 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:04:46,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:46,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1793026606, now seen corresponding path program 1 times [2021-12-18 21:04:46,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:46,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121965158] [2021-12-18 21:04:46,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:46,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:46,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:46,593 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:46,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-18 21:04:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:46,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 21:04:46,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:46,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:04:46,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:04:46,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:04:46,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:04:46,892 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:04:46,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:04:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:04:46,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:49,175 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:49,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121965158] [2021-12-18 21:04:49,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121965158] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:04:49,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1210956040] [2021-12-18 21:04:49,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:49,176 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:04:49,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:04:49,178 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:04:49,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-12-18 21:04:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:49,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 21:04:49,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:49,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:04:49,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:04:49,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:04:49,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:04:49,438 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:04:49,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:04:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:04:49,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:51,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1210956040] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:04:51,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:04:51,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-18 21:04:51,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140763729] [2021-12-18 21:04:51,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:04:51,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 21:04:51,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:51,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 21:04:51,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=86, Unknown=1, NotChecked=0, Total=110 [2021-12-18 21:04:51,676 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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) [2021-12-18 21:04:54,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:54,288 INFO L93 Difference]: Finished difference Result 203 states and 225 transitions. [2021-12-18 21:04:54,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:04:54,288 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 17 [2021-12-18 21:04:54,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:54,290 INFO L225 Difference]: With dead ends: 203 [2021-12-18 21:04:54,290 INFO L226 Difference]: Without dead ends: 203 [2021-12-18 21:04:54,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=32, Invalid=122, Unknown=2, NotChecked=0, Total=156 [2021-12-18 21:04:54,291 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 162 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:54,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 616 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 411 Invalid, 0 Unknown, 82 Unchecked, 0.5s Time] [2021-12-18 21:04:54,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-18 21:04:54,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 145. [2021-12-18 21:04:54,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 99 states have (on average 1.6262626262626263) internal successors, (161), 127 states have internal predecessors, (161), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-18 21:04:54,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 190 transitions. [2021-12-18 21:04:54,300 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 190 transitions. Word has length 17 [2021-12-18 21:04:54,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:54,300 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 190 transitions. [2021-12-18 21:04:54,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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) [2021-12-18 21:04:54,301 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 190 transitions. [2021-12-18 21:04:54,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 21:04:54,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:54,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:54,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:54,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:54,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:54,704 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:04:54,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:54,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2086429614, now seen corresponding path program 1 times [2021-12-18 21:04:54,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:54,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91936594] [2021-12-18 21:04:54,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:54,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:54,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:54,706 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:54,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-18 21:04:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:54,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:04:54,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:04:54,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:04:54,829 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:54,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91936594] [2021-12-18 21:04:54,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91936594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:04:54,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:04:54,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:04:54,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932189261] [2021-12-18 21:04:54,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:04:54,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:04:54,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:54,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:04:54,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:04:54,831 INFO L87 Difference]: Start difference. First operand 145 states and 190 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-12-18 21:04:54,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:54,860 INFO L93 Difference]: Finished difference Result 136 states and 175 transitions. [2021-12-18 21:04:54,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:04:54,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 17 [2021-12-18 21:04:54,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:54,862 INFO L225 Difference]: With dead ends: 136 [2021-12-18 21:04:54,862 INFO L226 Difference]: Without dead ends: 134 [2021-12-18 21:04:54,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:04:54,863 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 0 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:54,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 378 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:04:54,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-18 21:04:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-12-18 21:04:54,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 92 states have (on average 1.641304347826087) internal successors, (151), 119 states have internal predecessors, (151), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2021-12-18 21:04:54,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 173 transitions. [2021-12-18 21:04:54,875 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 173 transitions. Word has length 17 [2021-12-18 21:04:54,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:54,875 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 173 transitions. [2021-12-18 21:04:54,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-12-18 21:04:54,876 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 173 transitions. [2021-12-18 21:04:54,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 21:04:54,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:54,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:54,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:55,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:55,085 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:04:55,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:55,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1138254343, now seen corresponding path program 1 times [2021-12-18 21:04:55,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:55,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327188745] [2021-12-18 21:04:55,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:55,086 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:55,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:55,087 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:55,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-18 21:04:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:55,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 21:04:55,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:04:55,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:04:55,425 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:55,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327188745] [2021-12-18 21:04:55,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327188745] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:04:55,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:04:55,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-18 21:04:55,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880385400] [2021-12-18 21:04:55,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:04:55,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:04:55,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:55,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:04:55,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:04:55,426 INFO L87 Difference]: Start difference. First operand 134 states and 173 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:04:55,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:55,604 INFO L93 Difference]: Finished difference Result 139 states and 176 transitions. [2021-12-18 21:04:55,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 21:04:55,605 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 18 [2021-12-18 21:04:55,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:55,606 INFO L225 Difference]: With dead ends: 139 [2021-12-18 21:04:55,606 INFO L226 Difference]: Without dead ends: 137 [2021-12-18 21:04:55,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-18 21:04:55,607 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 71 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:55,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 344 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2021-12-18 21:04:55,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-18 21:04:55,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-12-18 21:04:55,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 95 states have (on average 1.6) internal successors, (152), 121 states have internal predecessors, (152), 9 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2021-12-18 21:04:55,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 174 transitions. [2021-12-18 21:04:55,613 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 174 transitions. Word has length 18 [2021-12-18 21:04:55,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:55,613 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 174 transitions. [2021-12-18 21:04:55,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:04:55,613 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 174 transitions. [2021-12-18 21:04:55,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 21:04:55,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:55,614 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:55,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:55,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:55,815 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:04:55,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:55,815 INFO L85 PathProgramCache]: Analyzing trace with hash 968466533, now seen corresponding path program 1 times [2021-12-18 21:04:55,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:55,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960162207] [2021-12-18 21:04:55,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:55,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:55,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:55,817 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:55,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-18 21:04:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:55,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 21:04:55,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:04:58,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:58,166 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:58,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960162207] [2021-12-18 21:04:58,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960162207] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:04:58,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1753403998] [2021-12-18 21:04:58,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:58,167 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:04:58,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:04:58,168 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:04:58,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-12-18 21:04:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:58,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 21:04:58,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:04:58,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:58,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1753403998] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:04:58,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:04:58,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-18 21:04:58,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458993498] [2021-12-18 21:04:58,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:04:58,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 21:04:58,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:58,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 21:04:58,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=123, Unknown=1, NotChecked=0, Total=156 [2021-12-18 21:04:58,587 INFO L87 Difference]: Start difference. First operand 137 states and 174 transitions. Second operand has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:04:58,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:58,660 INFO L93 Difference]: Finished difference Result 140 states and 176 transitions. [2021-12-18 21:04:58,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:04:58,661 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2021-12-18 21:04:58,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:58,662 INFO L225 Difference]: With dead ends: 140 [2021-12-18 21:04:58,662 INFO L226 Difference]: Without dead ends: 135 [2021-12-18 21:04:58,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=32, Invalid=123, Unknown=1, NotChecked=0, Total=156 [2021-12-18 21:04:58,662 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 10 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:58,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 551 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 206 Unchecked, 0.1s Time] [2021-12-18 21:04:58,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-18 21:04:58,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2021-12-18 21:04:58,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 89 states have (on average 1.6292134831460674) internal successors, (145), 115 states have internal predecessors, (145), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-18 21:04:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 166 transitions. [2021-12-18 21:04:58,667 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 166 transitions. Word has length 21 [2021-12-18 21:04:58,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:58,667 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 166 transitions. [2021-12-18 21:04:58,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:04:58,668 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 166 transitions. [2021-12-18 21:04:58,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 21:04:58,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:58,668 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:58,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:58,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:59,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:59,069 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:04:59,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:59,070 INFO L85 PathProgramCache]: Analyzing trace with hash -406257806, now seen corresponding path program 1 times [2021-12-18 21:04:59,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:59,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282678699] [2021-12-18 21:04:59,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:59,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:59,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:59,071 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:59,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-18 21:04:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:59,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 21:04:59,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:59,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:04:59,281 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 21:04:59,282 INFO L388 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 15 treesize of output 20 [2021-12-18 21:04:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:04:59,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:04:59,476 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:59,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282678699] [2021-12-18 21:04:59,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282678699] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:04:59,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:04:59,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-12-18 21:04:59,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063603391] [2021-12-18 21:04:59,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:04:59,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:04:59,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:59,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:04:59,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:04:59,478 INFO L87 Difference]: Start difference. First operand 130 states and 166 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:04:59,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:59,764 INFO L93 Difference]: Finished difference Result 199 states and 255 transitions. [2021-12-18 21:04:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:04:59,765 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2021-12-18 21:04:59,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:59,766 INFO L225 Difference]: With dead ends: 199 [2021-12-18 21:04:59,766 INFO L226 Difference]: Without dead ends: 199 [2021-12-18 21:04:59,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:04:59,767 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 55 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:59,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 454 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 235 Invalid, 0 Unknown, 81 Unchecked, 0.3s Time] [2021-12-18 21:04:59,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-12-18 21:04:59,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 148. [2021-12-18 21:04:59,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 105 states have (on average 1.6095238095238096) internal successors, (169), 130 states have internal predecessors, (169), 10 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (15), 13 states have call predecessors, (15), 10 states have call successors, (15) [2021-12-18 21:04:59,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 194 transitions. [2021-12-18 21:04:59,773 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 194 transitions. Word has length 25 [2021-12-18 21:04:59,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:59,774 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 194 transitions. [2021-12-18 21:04:59,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:04:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 194 transitions. [2021-12-18 21:04:59,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 21:04:59,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:59,775 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:59,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:59,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:59,986 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:04:59,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:59,986 INFO L85 PathProgramCache]: Analyzing trace with hash -406257805, now seen corresponding path program 1 times [2021-12-18 21:04:59,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:59,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031778991] [2021-12-18 21:04:59,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:59,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:59,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:59,988 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:59,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-18 21:05:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:05:00,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 21:05:00,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:05:00,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:05:04,264 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:05:04,264 INFO L388 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 [2021-12-18 21:05:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 21:05:04,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:05:04,484 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:05:04,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031778991] [2021-12-18 21:05:04,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031778991] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:05:04,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1952653751] [2021-12-18 21:05:04,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:05:04,485 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:05:04,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:05:04,486 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:05:04,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-12-18 21:05:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:05:04,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 21:05:04,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:05:04,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:05:04,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:05:08,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:05:08,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:05:08,936 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:05:08,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:05:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 21:05:08,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:05:11,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1952653751] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:05:11,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:05:11,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-12-18 21:05:11,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127382374] [2021-12-18 21:05:11,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:05:11,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 21:05:11,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:05:11,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 21:05:11,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=224, Unknown=5, NotChecked=0, Total=272 [2021-12-18 21:05:11,279 INFO L87 Difference]: Start difference. First operand 148 states and 194 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:05:14,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:05:14,067 INFO L93 Difference]: Finished difference Result 273 states and 354 transitions. [2021-12-18 21:05:14,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:05:14,067 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2021-12-18 21:05:14,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:05:14,068 INFO L225 Difference]: With dead ends: 273 [2021-12-18 21:05:14,068 INFO L226 Difference]: Without dead ends: 273 [2021-12-18 21:05:14,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=56, Invalid=280, Unknown=6, NotChecked=0, Total=342 [2021-12-18 21:05:14,069 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 96 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 21:05:14,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 731 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 418 Invalid, 0 Unknown, 150 Unchecked, 0.7s Time] [2021-12-18 21:05:14,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-12-18 21:05:14,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 206. [2021-12-18 21:05:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 157 states have (on average 1.624203821656051) internal successors, (255), 182 states have internal predecessors, (255), 16 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (23), 19 states have call predecessors, (23), 16 states have call successors, (23) [2021-12-18 21:05:14,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 294 transitions. [2021-12-18 21:05:14,077 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 294 transitions. Word has length 25 [2021-12-18 21:05:14,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:05:14,078 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 294 transitions. [2021-12-18 21:05:14,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:05:14,078 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 294 transitions. [2021-12-18 21:05:14,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 21:05:14,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:05:14,079 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:05:14,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-12-18 21:05:14,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-18 21:05:14,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:05:14,484 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:05:14,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:05:14,484 INFO L85 PathProgramCache]: Analyzing trace with hash -911816431, now seen corresponding path program 1 times [2021-12-18 21:05:14,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:05:14,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861886850] [2021-12-18 21:05:14,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:05:14,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:05:14,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:05:14,486 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:05:14,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-18 21:05:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:05:14,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:05:14,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:05:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:05:14,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:05:14,652 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:05:14,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861886850] [2021-12-18 21:05:14,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861886850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:05:14,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:05:14,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:05:14,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608699298] [2021-12-18 21:05:14,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:05:14,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:05:14,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:05:14,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:05:14,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:05:14,653 INFO L87 Difference]: Start difference. First operand 206 states and 294 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:05:14,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:05:14,696 INFO L93 Difference]: Finished difference Result 161 states and 212 transitions. [2021-12-18 21:05:14,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:05:14,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-12-18 21:05:14,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:05:14,698 INFO L225 Difference]: With dead ends: 161 [2021-12-18 21:05:14,698 INFO L226 Difference]: Without dead ends: 157 [2021-12-18 21:05:14,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:05:14,699 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 0 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:05:14,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 359 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:05:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-18 21:05:14,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-12-18 21:05:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 116 states have (on average 1.5775862068965518) internal successors, (183), 139 states have internal predecessors, (183), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:05:14,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 208 transitions. [2021-12-18 21:05:14,705 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 208 transitions. Word has length 25 [2021-12-18 21:05:14,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:05:14,706 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 208 transitions. [2021-12-18 21:05:14,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:05:14,706 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 208 transitions. [2021-12-18 21:05:14,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-18 21:05:14,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:05:14,711 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:05:14,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-18 21:05:14,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:05:14,912 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:05:14,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:05:14,912 INFO L85 PathProgramCache]: Analyzing trace with hash 290909999, now seen corresponding path program 1 times [2021-12-18 21:05:14,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:05:14,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327333294] [2021-12-18 21:05:14,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:05:14,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:05:14,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:05:14,914 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:05:14,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-18 21:05:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:05:14,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:05:14,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:05:15,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:05:15,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:05:15,030 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:05:15,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327333294] [2021-12-18 21:05:15,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327333294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:05:15,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:05:15,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:05:15,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652299233] [2021-12-18 21:05:15,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:05:15,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:05:15,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:05:15,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:05:15,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:05:15,032 INFO L87 Difference]: Start difference. First operand 157 states and 208 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-12-18 21:05:15,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:05:15,089 INFO L93 Difference]: Finished difference Result 206 states and 255 transitions. [2021-12-18 21:05:15,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:05:15,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 26 [2021-12-18 21:05:15,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:05:15,092 INFO L225 Difference]: With dead ends: 206 [2021-12-18 21:05:15,092 INFO L226 Difference]: Without dead ends: 206 [2021-12-18 21:05:15,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:05:15,093 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 59 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:05:15,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 366 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:05:15,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-18 21:05:15,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 154. [2021-12-18 21:05:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 113 states have (on average 1.575221238938053) internal successors, (178), 136 states have internal predecessors, (178), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:05:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 203 transitions. [2021-12-18 21:05:15,097 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 203 transitions. Word has length 26 [2021-12-18 21:05:15,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:05:15,098 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 203 transitions. [2021-12-18 21:05:15,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-12-18 21:05:15,098 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 203 transitions. [2021-12-18 21:05:15,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-18 21:05:15,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:05:15,098 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:05:15,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-18 21:05:15,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:05:15,299 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:05:15,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:05:15,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1178413680, now seen corresponding path program 1 times [2021-12-18 21:05:15,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:05:15,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425579130] [2021-12-18 21:05:15,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:05:15,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:05:15,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:05:15,301 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:05:15,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-18 21:05:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:05:15,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:05:15,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:05:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:05:15,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:05:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:05:15,957 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:05:15,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425579130] [2021-12-18 21:05:15,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425579130] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:05:15,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:05:15,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-18 21:05:15,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152793442] [2021-12-18 21:05:15,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:05:15,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:05:15,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:05:15,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:05:15,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:05:15,959 INFO L87 Difference]: Start difference. First operand 154 states and 203 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:05:16,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:05:16,072 INFO L93 Difference]: Finished difference Result 199 states and 249 transitions. [2021-12-18 21:05:16,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:05:16,073 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2021-12-18 21:05:16,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:05:16,074 INFO L225 Difference]: With dead ends: 199 [2021-12-18 21:05:16,074 INFO L226 Difference]: Without dead ends: 199 [2021-12-18 21:05:16,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:05:16,075 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 65 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:05:16,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 413 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2021-12-18 21:05:16,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-12-18 21:05:16,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 165. [2021-12-18 21:05:16,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 121 states have (on average 1.5537190082644627) internal successors, (188), 145 states have internal predecessors, (188), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:05:16,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 213 transitions. [2021-12-18 21:05:16,080 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 213 transitions. Word has length 26 [2021-12-18 21:05:16,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:05:16,081 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 213 transitions. [2021-12-18 21:05:16,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:05:16,081 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 213 transitions. [2021-12-18 21:05:16,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 21:05:16,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:05:16,082 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:05:16,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-18 21:05:16,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:05:16,282 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:05:16,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:05:16,283 INFO L85 PathProgramCache]: Analyzing trace with hash 428272563, now seen corresponding path program 1 times [2021-12-18 21:05:16,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:05:16,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927996953] [2021-12-18 21:05:16,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:05:16,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:05:16,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:05:16,286 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:05:16,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-18 21:05:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:05:16,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 21:05:16,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:05:16,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:05:16,465 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 21:05:16,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-12-18 21:05:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:05:16,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:05:16,499 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:05:16,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927996953] [2021-12-18 21:05:16,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927996953] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:05:16,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:05:16,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:05:16,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199454903] [2021-12-18 21:05:16,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:05:16,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:05:16,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:05:16,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:05:16,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:05:16,501 INFO L87 Difference]: Start difference. First operand 165 states and 213 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:05:16,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:05:16,698 INFO L93 Difference]: Finished difference Result 203 states and 255 transitions. [2021-12-18 21:05:16,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:05:16,698 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-12-18 21:05:16,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:05:16,699 INFO L225 Difference]: With dead ends: 203 [2021-12-18 21:05:16,700 INFO L226 Difference]: Without dead ends: 203 [2021-12-18 21:05:16,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:05:16,700 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 90 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:05:16,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 317 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 136 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2021-12-18 21:05:16,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-18 21:05:16,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 164. [2021-12-18 21:05:16,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 121 states have (on average 1.537190082644628) internal successors, (186), 144 states have internal predecessors, (186), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:05:16,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 211 transitions. [2021-12-18 21:05:16,706 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 211 transitions. Word has length 27 [2021-12-18 21:05:16,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:05:16,706 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 211 transitions. [2021-12-18 21:05:16,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:05:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 211 transitions. [2021-12-18 21:05:16,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 21:05:16,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:05:16,707 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:05:16,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-18 21:05:16,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:05:16,916 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:05:16,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:05:16,917 INFO L85 PathProgramCache]: Analyzing trace with hash 428272564, now seen corresponding path program 1 times [2021-12-18 21:05:16,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:05:16,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [201401640] [2021-12-18 21:05:16,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:05:16,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:05:16,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:05:16,918 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:05:16,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-18 21:05:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:05:16,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 21:05:16,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:05:17,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:05:17,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:05:17,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:05:17,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:05:17,290 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:05:17,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:05:19,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:05:19,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:05:19,487 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:05:19,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:05:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:05:19,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:05:21,998 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:05:21,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [201401640] [2021-12-18 21:05:21,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [201401640] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:05:21,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [397026476] [2021-12-18 21:05:21,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:05:21,999 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:05:21,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:05:22,003 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:05:22,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-12-18 21:05:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:05:22,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-18 21:05:22,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:05:22,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:05:22,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:05:22,300 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:05:22,300 INFO L388 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 18 [2021-12-18 21:05:22,316 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:05:22,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:05:22,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:05:22,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:05:22,510 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:05:22,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:05:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:05:22,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:05:24,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [397026476] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:05:24,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:05:24,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 11 [2021-12-18 21:05:24,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480122055] [2021-12-18 21:05:24,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:05:24,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 21:05:24,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:05:24,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 21:05:24,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=174, Unknown=1, NotChecked=0, Total=210 [2021-12-18 21:05:24,883 INFO L87 Difference]: Start difference. First operand 164 states and 211 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:05:25,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:05:25,702 INFO L93 Difference]: Finished difference Result 222 states and 247 transitions. [2021-12-18 21:05:25,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 21:05:25,703 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-12-18 21:05:25,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:05:25,704 INFO L225 Difference]: With dead ends: 222 [2021-12-18 21:05:25,704 INFO L226 Difference]: Without dead ends: 222 [2021-12-18 21:05:25,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=60, Invalid=281, Unknown=1, NotChecked=0, Total=342 [2021-12-18 21:05:25,705 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 174 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 21:05:25,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 917 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 551 Invalid, 0 Unknown, 152 Unchecked, 0.7s Time] [2021-12-18 21:05:25,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-18 21:05:25,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 133. [2021-12-18 21:05:25,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 94 states have (on average 1.4893617021276595) internal successors, (140), 116 states have internal predecessors, (140), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-18 21:05:25,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 158 transitions. [2021-12-18 21:05:25,709 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 158 transitions. Word has length 27 [2021-12-18 21:05:25,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:05:25,710 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 158 transitions. [2021-12-18 21:05:25,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:05:25,710 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 158 transitions. [2021-12-18 21:05:25,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 21:05:25,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:05:25,711 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:05:25,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-12-18 21:05:25,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-18 21:05:26,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:05:26,114 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:05:26,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:05:26,114 INFO L85 PathProgramCache]: Analyzing trace with hash -746927052, now seen corresponding path program 1 times [2021-12-18 21:05:26,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:05:26,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638462112] [2021-12-18 21:05:26,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:05:26,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:05:26,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:05:26,116 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:05:26,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-18 21:05:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:05:26,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 21:05:26,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:05:26,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:05:26,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:05:26,474 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-18 21:05:26,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2021-12-18 21:05:26,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:05:26,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 48 [2021-12-18 21:05:26,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:05:26,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:05:27,002 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-12-18 21:05:27,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 69 [2021-12-18 21:05:27,069 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:05:27,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638462112] [2021-12-18 21:05:27,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638462112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:05:27,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1288917323] [2021-12-18 21:05:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:05:27,070 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:05:27,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:05:27,072 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:05:27,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-12-18 21:05:27,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:05:27,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 21:05:27,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:05:27,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:05:27,387 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:05:27,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:05:27,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:05:29,546 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_16| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_16|) (_ bv0 32)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_16|))) is different from true [2021-12-18 21:05:29,671 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:05:29,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2021-12-18 21:05:29,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-12-18 21:05:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-12-18 21:05:29,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:05:29,839 INFO L354 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2021-12-18 21:05:29,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-18 21:05:29,846 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_247 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_247) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) is different from false [2021-12-18 21:05:29,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1288917323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:05:29,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:05:29,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-18 21:05:29,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337996760] [2021-12-18 21:05:29,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:05:29,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-18 21:05:29,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:05:29,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-18 21:05:29,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=839, Unknown=2, NotChecked=118, Total=1056 [2021-12-18 21:05:29,862 INFO L87 Difference]: Start difference. First operand 133 states and 158 transitions. Second operand has 27 states, 25 states have (on average 1.52) internal successors, (38), 22 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:05:40,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:05:40,544 INFO L93 Difference]: Finished difference Result 205 states and 231 transitions. [2021-12-18 21:05:40,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 21:05:40,544 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.52) internal successors, (38), 22 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2021-12-18 21:05:40,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:05:40,545 INFO L225 Difference]: With dead ends: 205 [2021-12-18 21:05:40,545 INFO L226 Difference]: Without dead ends: 205 [2021-12-18 21:05:40,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=362, Invalid=2092, Unknown=4, NotChecked=194, Total=2652 [2021-12-18 21:05:40,547 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 381 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:05:40,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 1312 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1233 Invalid, 0 Unknown, 215 Unchecked, 1.5s Time] [2021-12-18 21:05:40,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-18 21:05:40,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 100. [2021-12-18 21:05:40,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 87 states have internal predecessors, (92), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:05:40,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2021-12-18 21:05:40,551 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 29 [2021-12-18 21:05:40,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:05:40,551 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2021-12-18 21:05:40,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.52) internal successors, (38), 22 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:05:40,551 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2021-12-18 21:05:40,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 21:05:40,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:05:40,552 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:05:40,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-12-18 21:05:40,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-18 21:05:40,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:05:40,967 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:05:40,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:05:40,968 INFO L85 PathProgramCache]: Analyzing trace with hash -746927051, now seen corresponding path program 1 times [2021-12-18 21:05:40,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:05:40,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409145606] [2021-12-18 21:05:40,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:05:40,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:05:40,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:05:40,969 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:05:40,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-18 21:05:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:05:41,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 21:05:41,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:05:41,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:05:41,142 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:05:41,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:05:41,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:05:41,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:05:41,444 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:05:41,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2021-12-18 21:05:41,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-12-18 21:05:41,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-18 21:05:41,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-18 21:05:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:05:41,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:05:41,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:05:41,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 54 [2021-12-18 21:05:42,103 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_1 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_prenex_1) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) (or (forall ((v_ArrVal_272 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_272) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (forall ((v_ArrVal_271 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_271) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|) (_ bv4 32))))) (forall ((v_ArrVal_271 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_271) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|) (_ bv4 32)) (bvadd |c_ULTIMATE.start_entry_point_~cfg~1#1.offset| (_ bv4 32))))) is different from false [2021-12-18 21:05:42,191 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:05:42,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409145606] [2021-12-18 21:05:42,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409145606] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:05:42,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [444278213] [2021-12-18 21:05:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:05:42,192 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:05:42,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:05:42,195 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:05:42,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-12-18 21:05:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:05:42,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-18 21:05:42,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:05:42,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:05:42,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:05:44,748 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:05:44,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 21:05:44,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:05:44,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:05:45,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-18 21:05:45,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-18 21:05:49,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:05:49,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:05:49,448 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 21:05:49,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 25 [2021-12-18 21:05:49,608 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:05:49,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-12-18 21:05:49,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 21:05:49,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:05:49,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-18 21:05:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:05:49,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:05:50,041 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_300 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_300) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) (forall ((v_ArrVal_299 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_300 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_300) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|) (_ bv4 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_299) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))))) is different from false [2021-12-18 21:05:50,228 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_74| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_74|))) (and (forall ((v_ArrVal_300 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_300) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) (forall ((v_ArrVal_299 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_300 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_303 (_ BitVec 32))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_300) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|) (_ bv4 32)) (select (store |c_#length| |v_ldv_malloc_#res.base_74| v_ArrVal_303) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_299) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))))))) is different from false [2021-12-18 21:05:50,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [444278213] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:05:50,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:05:50,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-12-18 21:05:50,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693749599] [2021-12-18 21:05:50,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:05:50,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 21:05:50,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:05:50,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 21:05:50,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1013, Unknown=5, NotChecked=198, Total=1332 [2021-12-18 21:05:50,235 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand has 30 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 26 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:05:55,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:05:55,528 INFO L93 Difference]: Finished difference Result 158 states and 167 transitions. [2021-12-18 21:05:55,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 21:05:55,528 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 26 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2021-12-18 21:05:55,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:05:55,529 INFO L225 Difference]: With dead ends: 158 [2021-12-18 21:05:55,529 INFO L226 Difference]: Without dead ends: 158 [2021-12-18 21:05:55,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=242, Invalid=1744, Unknown=6, NotChecked=264, Total=2256 [2021-12-18 21:05:55,531 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 131 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 21:05:55,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 817 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 570 Invalid, 0 Unknown, 111 Unchecked, 0.6s Time] [2021-12-18 21:05:55,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-18 21:05:55,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 99. [2021-12-18 21:05:55,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 68 states have (on average 1.338235294117647) internal successors, (91), 86 states have internal predecessors, (91), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:05:55,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2021-12-18 21:05:55,535 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 29 [2021-12-18 21:05:55,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:05:55,535 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2021-12-18 21:05:55,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 26 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:05:55,535 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2021-12-18 21:05:55,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 21:05:55,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:05:55,536 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:05:55,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-12-18 21:05:55,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-18 21:05:55,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:05:55,939 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:05:55,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:05:55,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1269350632, now seen corresponding path program 1 times [2021-12-18 21:05:55,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:05:55,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821070496] [2021-12-18 21:05:55,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:05:55,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:05:55,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:05:55,941 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:05:55,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-18 21:05:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:05:56,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 21:05:56,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:06:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:06:02,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:06:04,625 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:06:04,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821070496] [2021-12-18 21:06:04,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821070496] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:06:04,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1826621559] [2021-12-18 21:06:04,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:06:04,626 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:06:04,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:06:04,627 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:06:04,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-12-18 21:06:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:06:04,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 21:06:04,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:06:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:06:19,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:06:20,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1826621559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:06:20,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:06:20,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-12-18 21:06:20,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397695753] [2021-12-18 21:06:20,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:06:20,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 21:06:20,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:06:20,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 21:06:20,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=540, Unknown=8, NotChecked=0, Total=650 [2021-12-18 21:06:20,150 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 21 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:06:20,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:06:20,325 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2021-12-18 21:06:20,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 21:06:20,326 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32 [2021-12-18 21:06:20,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:06:20,326 INFO L225 Difference]: With dead ends: 104 [2021-12-18 21:06:20,326 INFO L226 Difference]: Without dead ends: 96 [2021-12-18 21:06:20,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=110, Invalid=638, Unknown=8, NotChecked=0, Total=756 [2021-12-18 21:06:20,327 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 12 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:06:20,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 560 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 108 Invalid, 0 Unknown, 235 Unchecked, 0.1s Time] [2021-12-18 21:06:20,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-18 21:06:20,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2021-12-18 21:06:20,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 77 states have internal predecessors, (81), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:06:20,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-12-18 21:06:20,330 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 32 [2021-12-18 21:06:20,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:06:20,330 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-12-18 21:06:20,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:06:20,331 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-12-18 21:06:20,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-18 21:06:20,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:06:20,331 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-18 21:06:20,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-18 21:06:20,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-12-18 21:06:20,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:06:20,741 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:06:20,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:06:20,741 INFO L85 PathProgramCache]: Analyzing trace with hash 411440938, now seen corresponding path program 1 times [2021-12-18 21:06:20,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:06:20,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925355104] [2021-12-18 21:06:20,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:06:20,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:06:20,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:06:20,743 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:06:20,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-18 21:06:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:06:20,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-18 21:06:20,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:06:20,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:06:20,927 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:06:20,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:06:20,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:06:20,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:06:22,996 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_16| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_26| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_26|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_16|) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_26|))) is different from true [2021-12-18 21:06:23,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:06:27,207 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-18 21:06:27,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-12-18 21:06:27,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-12-18 21:06:27,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-12-18 21:06:27,400 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 21:06:27,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2021-12-18 21:06:27,586 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 21:06:27,586 INFO L388 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 15 treesize of output 20 [2021-12-18 21:06:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2021-12-18 21:06:27,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:06:28,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 77 [2021-12-18 21:06:28,661 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_87| (_ BitVec 32)) (v_ArrVal_364 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base|) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset| |v_ldv_malloc_#res.base_87|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_364) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)) |v_ldv_malloc_#res.base_87|)) is different from false [2021-12-18 21:06:28,663 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:06:28,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925355104] [2021-12-18 21:06:28,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925355104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:06:28,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [672161171] [2021-12-18 21:06:28,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:06:28,664 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:06:28,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:06:28,667 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) [2021-12-18 21:06:28,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-12-18 21:06:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:06:28,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-18 21:06:28,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:06:28,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:06:31,071 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:06:31,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:06:31,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:06:31,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:06:33,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:06:33,750 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-18 21:06:33,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-12-18 21:06:33,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 38 [2021-12-18 21:06:33,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-12-18 21:06:34,142 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 21:06:34,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2021-12-18 21:06:38,327 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:06:38,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 21:06:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:06:38,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:06:38,634 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_397 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base|) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset| |c_ULTIMATE.start_entry_point_~fe~1#1.base|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_397) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)))) (_ bv1 1)))) is different from false [2021-12-18 21:06:40,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 77 [2021-12-18 21:06:40,833 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_364 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ldv_malloc_#res.base_94| (_ BitVec 32))) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base|) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset| |v_ldv_malloc_#res.base_94|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_364) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)) |v_ldv_malloc_#res.base_94|)) is different from false [2021-12-18 21:06:40,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [672161171] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:06:40,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:06:40,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2021-12-18 21:06:40,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58183959] [2021-12-18 21:06:40,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:06:40,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-18 21:06:40,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:06:40,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-18 21:06:40,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1645, Unknown=34, NotChecked=340, Total=2162 [2021-12-18 21:06:40,838 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 37 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 31 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-18 21:06:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:06:58,164 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2021-12-18 21:06:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 21:06:58,165 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 31 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 38 [2021-12-18 21:06:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:06:58,165 INFO L225 Difference]: With dead ends: 129 [2021-12-18 21:06:58,165 INFO L226 Difference]: Without dead ends: 129 [2021-12-18 21:06:58,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 52 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=230, Invalid=2198, Unknown=38, NotChecked=396, Total=2862 [2021-12-18 21:06:58,166 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 54 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 434 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 21:06:58,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 968 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 772 Invalid, 0 Unknown, 434 Unchecked, 0.7s Time] [2021-12-18 21:06:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-18 21:06:58,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 103. [2021-12-18 21:06:58,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 89 states have internal predecessors, (95), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:06:58,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2021-12-18 21:06:58,170 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 38 [2021-12-18 21:06:58,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:06:58,170 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2021-12-18 21:06:58,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 31 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-18 21:06:58,171 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2021-12-18 21:06:58,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-18 21:06:58,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:06:58,172 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-18 21:06:58,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-12-18 21:06:58,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-18 21:06:58,574 WARN L452 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 [2021-12-18 21:06:58,574 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:06:58,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:06:58,575 INFO L85 PathProgramCache]: Analyzing trace with hash 411440939, now seen corresponding path program 1 times [2021-12-18 21:06:58,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:06:58,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351246840] [2021-12-18 21:06:58,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:06:58,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:06:58,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:06:58,576 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:06:58,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-18 21:06:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:06:58,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 21:06:58,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:06:58,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:06:58,754 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:06:58,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:06:58,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:06:58,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:07:00,823 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_19| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_30| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_30|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_19|) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_30|))) is different from true [2021-12-18 21:07:02,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:02,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:05,139 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-18 21:07:05,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-18 21:07:05,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 51 [2021-12-18 21:07:05,407 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-18 21:07:05,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 46 [2021-12-18 21:07:05,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2021-12-18 21:07:05,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:07:05,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:07:05,727 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:05,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:07:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-18 21:07:05,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:12,173 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:12,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1351246840] [2021-12-18 21:07:12,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1351246840] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:07:12,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [316923380] [2021-12-18 21:07:12,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:12,174 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:07:12,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:07:12,175 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) [2021-12-18 21:07:12,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-12-18 21:07:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:12,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-18 21:07:12,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:12,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:12,603 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:12,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:07:12,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:07:12,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:07:15,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:15,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:15,522 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-18 21:07:15,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-18 21:07:15,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 54 [2021-12-18 21:07:16,136 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 21:07:16,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 46 [2021-12-18 21:07:16,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-12-18 21:07:16,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:07:16,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:07:16,351 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:16,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:07:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:07:16,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:21,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [316923380] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:07:21,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:07:21,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 39 [2021-12-18 21:07:21,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180547920] [2021-12-18 21:07:21,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:07:21,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-18 21:07:21,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:21,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-18 21:07:21,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1510, Unknown=5, NotChecked=78, Total=1722 [2021-12-18 21:07:21,488 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand has 40 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 32 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:07:27,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:27,289 INFO L93 Difference]: Finished difference Result 173 states and 185 transitions. [2021-12-18 21:07:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 21:07:27,289 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 32 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 38 [2021-12-18 21:07:27,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:27,290 INFO L225 Difference]: With dead ends: 173 [2021-12-18 21:07:27,290 INFO L226 Difference]: Without dead ends: 173 [2021-12-18 21:07:27,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=211, Invalid=2138, Unknown=7, NotChecked=94, Total=2450 [2021-12-18 21:07:27,292 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 107 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 462 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:27,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1263 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 788 Invalid, 0 Unknown, 462 Unchecked, 0.9s Time] [2021-12-18 21:07:27,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-18 21:07:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 103. [2021-12-18 21:07:27,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 71 states have (on average 1.323943661971831) internal successors, (94), 89 states have internal predecessors, (94), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:07:27,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 109 transitions. [2021-12-18 21:07:27,296 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 109 transitions. Word has length 38 [2021-12-18 21:07:27,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:27,296 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 109 transitions. [2021-12-18 21:07:27,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 32 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:07:27,296 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 109 transitions. [2021-12-18 21:07:27,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-18 21:07:27,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:27,297 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:27,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:27,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:27,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:07:27,700 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:07:27,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:27,700 INFO L85 PathProgramCache]: Analyzing trace with hash -433030933, now seen corresponding path program 1 times [2021-12-18 21:07:27,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:27,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688756338] [2021-12-18 21:07:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:27,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:27,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:27,702 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:07:27,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-18 21:07:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:27,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:07:27,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:07:27,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:07:27,863 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:27,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688756338] [2021-12-18 21:07:27,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688756338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:07:27,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:07:27,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:07:27,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531197108] [2021-12-18 21:07:27,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:07:27,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:07:27,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:27,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:07:27,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:07:27,865 INFO L87 Difference]: Start difference. First operand 103 states and 109 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:07:27,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:27,884 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2021-12-18 21:07:27,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:07:27,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2021-12-18 21:07:27,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:27,886 INFO L225 Difference]: With dead ends: 93 [2021-12-18 21:07:27,886 INFO L226 Difference]: Without dead ends: 89 [2021-12-18 21:07:27,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:07:27,886 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 0 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:27,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 320 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:07:27,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-18 21:07:27,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-12-18 21:07:27,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 75 states have internal predecessors, (78), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:07:27,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2021-12-18 21:07:27,890 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 38 [2021-12-18 21:07:27,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:27,890 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2021-12-18 21:07:27,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:07:27,890 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2021-12-18 21:07:27,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 21:07:27,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:27,891 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-18 21:07:27,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-12-18 21:07:28,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:07:28,099 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_i2c_set_clientdataErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:07:28,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:28,100 INFO L85 PathProgramCache]: Analyzing trace with hash 257770205, now seen corresponding path program 1 times [2021-12-18 21:07:28,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:28,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350732514] [2021-12-18 21:07:28,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:28,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:28,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:28,102 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:07:28,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-18 21:07:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:28,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:07:28,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:07:28,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:07:28,248 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:28,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350732514] [2021-12-18 21:07:28,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350732514] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:07:28,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:07:28,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:07:28,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115365469] [2021-12-18 21:07:28,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:07:28,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:07:28,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:28,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:07:28,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:07:28,250 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 21:07:28,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:28,284 INFO L93 Difference]: Finished difference Result 131 states and 136 transitions. [2021-12-18 21:07:28,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:07:28,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-12-18 21:07:28,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:28,285 INFO L225 Difference]: With dead ends: 131 [2021-12-18 21:07:28,285 INFO L226 Difference]: Without dead ends: 131 [2021-12-18 21:07:28,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:07:28,286 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 41 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:28,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 393 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:07:28,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-18 21:07:28,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 91. [2021-12-18 21:07:28,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 78 states have internal predecessors, (81), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:07:28,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2021-12-18 21:07:28,289 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 40 [2021-12-18 21:07:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:28,289 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2021-12-18 21:07:28,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 21:07:28,290 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2021-12-18 21:07:28,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 21:07:28,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:28,290 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:28,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:28,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:07:28,500 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_i2c_set_clientdataErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:07:28,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:28,500 INFO L85 PathProgramCache]: Analyzing trace with hash 2000580540, now seen corresponding path program 1 times [2021-12-18 21:07:28,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:28,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992609710] [2021-12-18 21:07:28,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:28,501 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:28,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:28,501 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:07:28,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-18 21:07:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:28,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 21:07:28,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:28,663 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:07:28,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:07:28,664 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:28,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992609710] [2021-12-18 21:07:28,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992609710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:07:28,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:07:28,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:07:28,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480396230] [2021-12-18 21:07:28,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:07:28,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:07:28,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:28,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:07:28,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:07:28,665 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:07:28,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:28,885 INFO L93 Difference]: Finished difference Result 126 states and 130 transitions. [2021-12-18 21:07:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:07:28,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2021-12-18 21:07:28,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:28,887 INFO L225 Difference]: With dead ends: 126 [2021-12-18 21:07:28,887 INFO L226 Difference]: Without dead ends: 126 [2021-12-18 21:07:28,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:07:28,888 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 50 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:28,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 284 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:07:28,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-18 21:07:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2021-12-18 21:07:28,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 84 states have internal predecessors, (87), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:07:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-12-18 21:07:28,894 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 40 [2021-12-18 21:07:28,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:28,894 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-12-18 21:07:28,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:07:28,895 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-12-18 21:07:28,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 21:07:28,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:28,895 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:28,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:29,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:07:29,104 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_i2c_set_clientdataErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:07:29,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:29,105 INFO L85 PathProgramCache]: Analyzing trace with hash 2000580541, now seen corresponding path program 1 times [2021-12-18 21:07:29,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:29,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383303697] [2021-12-18 21:07:29,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:29,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:29,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:29,106 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:07:29,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-18 21:07:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:29,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-18 21:07:29,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:29,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:29,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:29,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:07:29,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:07:29,411 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:29,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:07:31,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:07:31,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:07:31,537 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:31,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:07:31,709 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:07:31,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:34,600 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:34,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383303697] [2021-12-18 21:07:34,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383303697] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:07:34,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1113918114] [2021-12-18 21:07:34,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:34,600 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:07:34,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:07:34,601 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:07:34,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-12-18 21:07:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:34,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-18 21:07:34,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:34,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:34,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:34,908 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:34,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:07:34,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:07:35,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:07:35,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:07:35,068 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:35,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:07:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:07:35,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:38,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1113918114] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:07:38,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:07:38,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 14 [2021-12-18 21:07:38,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451171709] [2021-12-18 21:07:38,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:07:38,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 21:07:38,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:38,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 21:07:38,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=367, Unknown=1, NotChecked=0, Total=420 [2021-12-18 21:07:38,473 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:07:43,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:43,190 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2021-12-18 21:07:43,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 21:07:43,190 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2021-12-18 21:07:43,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:43,191 INFO L225 Difference]: With dead ends: 137 [2021-12-18 21:07:43,191 INFO L226 Difference]: Without dead ends: 137 [2021-12-18 21:07:43,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=87, Invalid=560, Unknown=3, NotChecked=0, Total=650 [2021-12-18 21:07:43,192 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 115 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:43,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 705 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 399 Invalid, 0 Unknown, 40 Unchecked, 0.5s Time] [2021-12-18 21:07:43,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-18 21:07:43,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2021-12-18 21:07:43,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 84 states have internal predecessors, (86), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:07:43,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2021-12-18 21:07:43,200 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 40 [2021-12-18 21:07:43,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:43,201 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2021-12-18 21:07:43,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:07:43,201 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2021-12-18 21:07:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 21:07:43,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:43,202 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-18 21:07:43,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:43,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:43,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:07:43,612 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_i2c_set_clientdataErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:07:43,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:43,612 INFO L85 PathProgramCache]: Analyzing trace with hash -599580005, now seen corresponding path program 1 times [2021-12-18 21:07:43,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:43,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033842739] [2021-12-18 21:07:43,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:43,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:43,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:43,613 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:07:43,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-18 21:07:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:43,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 21:07:43,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:43,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:43,836 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 21:07:43,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-12-18 21:07:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:07:43,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:07:43,878 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:43,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033842739] [2021-12-18 21:07:43,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033842739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:07:43,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:07:43,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:07:43,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530120259] [2021-12-18 21:07:43,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:07:43,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 21:07:43,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:43,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 21:07:43,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:07:43,879 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:07:44,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:44,115 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2021-12-18 21:07:44,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:07:44,115 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2021-12-18 21:07:44,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:44,116 INFO L225 Difference]: With dead ends: 118 [2021-12-18 21:07:44,116 INFO L226 Difference]: Without dead ends: 118 [2021-12-18 21:07:44,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:07:44,117 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 48 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:44,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 273 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 119 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2021-12-18 21:07:44,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-18 21:07:44,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 97. [2021-12-18 21:07:44,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 83 states have internal predecessors, (85), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:07:44,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2021-12-18 21:07:44,120 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 41 [2021-12-18 21:07:44,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:44,121 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2021-12-18 21:07:44,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:07:44,121 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2021-12-18 21:07:44,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 21:07:44,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:44,122 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-18 21:07:44,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:44,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:07:44,331 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_i2c_set_clientdataErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:07:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:44,332 INFO L85 PathProgramCache]: Analyzing trace with hash -599580004, now seen corresponding path program 1 times [2021-12-18 21:07:44,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:44,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201243745] [2021-12-18 21:07:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:44,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:44,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:44,334 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:07:44,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-18 21:07:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:44,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-18 21:07:44,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:44,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:44,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:46,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:07:46,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:07:46,671 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:46,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:07:48,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:07:48,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:07:48,804 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:48,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:07:48,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:07:48,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:07:48,990 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:48,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:07:49,079 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:07:49,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:49,672 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:49,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201243745] [2021-12-18 21:07:49,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201243745] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:07:49,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [55918716] [2021-12-18 21:07:49,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:49,673 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:07:49,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:07:49,673 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:07:49,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-12-18 21:07:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:49,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-18 21:07:49,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:49,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:49,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:50,012 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:50,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:07:50,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:07:52,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:07:52,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:07:52,229 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:52,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:07:52,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:07:52,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:07:52,381 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:52,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:07:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:07:52,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:52,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [55918716] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:07:52,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:07:52,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 14 [2021-12-18 21:07:52,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644981545] [2021-12-18 21:07:52,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:07:52,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 21:07:52,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:52,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 21:07:52,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=297, Unknown=1, NotChecked=0, Total=342 [2021-12-18 21:07:52,713 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:07:55,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:55,379 INFO L93 Difference]: Finished difference Result 156 states and 160 transitions. [2021-12-18 21:07:55,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 21:07:55,380 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2021-12-18 21:07:55,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:55,381 INFO L225 Difference]: With dead ends: 156 [2021-12-18 21:07:55,381 INFO L226 Difference]: Without dead ends: 156 [2021-12-18 21:07:55,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=80, Invalid=518, Unknown=2, NotChecked=0, Total=600 [2021-12-18 21:07:55,382 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 170 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:55,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 536 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 401 Invalid, 0 Unknown, 48 Unchecked, 0.5s Time] [2021-12-18 21:07:55,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-18 21:07:55,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 96. [2021-12-18 21:07:55,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 82 states have internal predecessors, (84), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:07:55,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2021-12-18 21:07:55,385 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 41 [2021-12-18 21:07:55,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:55,385 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2021-12-18 21:07:55,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:07:55,386 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2021-12-18 21:07:55,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-18 21:07:55,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:55,386 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-18 21:07:55,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-12-18 21:07:55,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:55,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:07:55,796 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:07:55,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:55,797 INFO L85 PathProgramCache]: Analyzing trace with hash -359356304, now seen corresponding path program 1 times [2021-12-18 21:07:55,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:55,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414284721] [2021-12-18 21:07:55,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:55,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:55,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:55,798 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:07:55,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-12-18 21:07:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:55,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:07:55,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:07:55,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:07:55,973 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:55,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414284721] [2021-12-18 21:07:55,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414284721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:07:55,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:07:55,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:07:55,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685946772] [2021-12-18 21:07:55,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:07:55,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:07:55,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:55,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:07:55,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:07:55,974 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:07:55,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:55,994 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2021-12-18 21:07:55,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:07:55,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2021-12-18 21:07:55,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:55,995 INFO L225 Difference]: With dead ends: 95 [2021-12-18 21:07:55,995 INFO L226 Difference]: Without dead ends: 95 [2021-12-18 21:07:55,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:07:55,995 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 40 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:55,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 246 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:07:55,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-18 21:07:55,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-18 21:07:55,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 81 states have internal predecessors, (83), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:07:55,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2021-12-18 21:07:55,998 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 45 [2021-12-18 21:07:55,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:55,998 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2021-12-18 21:07:55,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:07:55,999 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2021-12-18 21:07:55,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 21:07:55,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:55,999 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-18 21:07:56,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:56,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:07:56,207 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:07:56,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:56,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1744856553, now seen corresponding path program 1 times [2021-12-18 21:07:56,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:56,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976705662] [2021-12-18 21:07:56,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:56,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:56,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:56,210 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:07:56,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-12-18 21:07:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:56,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:07:56,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:07:56,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:07:56,724 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:56,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976705662] [2021-12-18 21:07:56,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976705662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:07:56,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:07:56,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:07:56,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658026150] [2021-12-18 21:07:56,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:07:56,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 21:07:56,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:56,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 21:07:56,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:07:56,725 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:07:56,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:56,751 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2021-12-18 21:07:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:07:56,751 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2021-12-18 21:07:56,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:56,752 INFO L225 Difference]: With dead ends: 102 [2021-12-18 21:07:56,752 INFO L226 Difference]: Without dead ends: 102 [2021-12-18 21:07:56,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:07:56,752 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 41 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:56,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 211 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 53 Unchecked, 0.0s Time] [2021-12-18 21:07:56,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-18 21:07:56,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2021-12-18 21:07:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 82 states have internal predecessors, (85), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:07:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2021-12-18 21:07:56,755 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 46 [2021-12-18 21:07:56,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:56,755 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2021-12-18 21:07:56,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:07:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2021-12-18 21:07:56,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 21:07:56,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:56,756 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:56,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:56,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:07:56,956 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:07:56,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:56,957 INFO L85 PathProgramCache]: Analyzing trace with hash -599225383, now seen corresponding path program 1 times [2021-12-18 21:07:56,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:56,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915366531] [2021-12-18 21:07:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:56,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:56,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:56,958 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:07:56,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-12-18 21:07:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:57,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 21:07:57,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:07:57,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:07:57,169 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:57,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915366531] [2021-12-18 21:07:57,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915366531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:07:57,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:07:57,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:07:57,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379548686] [2021-12-18 21:07:57,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:07:57,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 21:07:57,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:57,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 21:07:57,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:07:57,171 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:07:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:57,340 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2021-12-18 21:07:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 21:07:57,340 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2021-12-18 21:07:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:57,341 INFO L225 Difference]: With dead ends: 143 [2021-12-18 21:07:57,341 INFO L226 Difference]: Without dead ends: 143 [2021-12-18 21:07:57,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:07:57,342 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 98 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:57,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 314 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 125 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2021-12-18 21:07:57,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-18 21:07:57,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2021-12-18 21:07:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 88 states have internal predecessors, (92), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:07:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2021-12-18 21:07:57,352 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 46 [2021-12-18 21:07:57,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:57,353 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2021-12-18 21:07:57,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:07:57,353 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2021-12-18 21:07:57,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 21:07:57,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:57,354 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:57,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:57,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:07:57,559 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:07:57,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:57,560 INFO L85 PathProgramCache]: Analyzing trace with hash -599225382, now seen corresponding path program 1 times [2021-12-18 21:07:57,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:57,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915241120] [2021-12-18 21:07:57,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:57,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:57,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:57,561 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:07:57,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-12-18 21:07:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:57,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-18 21:07:57,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:07:57,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:58,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:07:58,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2021-12-18 21:07:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:07:58,939 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:58,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915241120] [2021-12-18 21:07:58,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915241120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:07:58,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:07:58,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-18 21:07:58,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046930844] [2021-12-18 21:07:58,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:07:58,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-18 21:07:58,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:58,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-18 21:07:58,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-12-18 21:07:58,941 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-18 21:07:59,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:59,533 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2021-12-18 21:07:59,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 21:07:59,534 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) Word has length 46 [2021-12-18 21:07:59,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:59,534 INFO L225 Difference]: With dead ends: 103 [2021-12-18 21:07:59,534 INFO L226 Difference]: Without dead ends: 103 [2021-12-18 21:07:59,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-12-18 21:07:59,535 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 206 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:59,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 486 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 21:07:59,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-18 21:07:59,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-12-18 21:07:59,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.2) internal successors, (90), 87 states have internal predecessors, (90), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:07:59,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2021-12-18 21:07:59,540 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 46 [2021-12-18 21:07:59,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:59,540 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2021-12-18 21:07:59,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-18 21:07:59,541 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2021-12-18 21:07:59,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 21:07:59,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:59,541 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:59,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:59,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:07:59,751 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:07:59,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:59,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1239297928, now seen corresponding path program 1 times [2021-12-18 21:07:59,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:59,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061835843] [2021-12-18 21:07:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:59,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:59,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:59,753 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:07:59,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-12-18 21:07:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:59,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:07:59,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:07:59,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:07:59,963 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:59,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061835843] [2021-12-18 21:07:59,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061835843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:07:59,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:07:59,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:07:59,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916495821] [2021-12-18 21:07:59,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:07:59,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:07:59,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:59,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:07:59,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:07:59,965 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:07:59,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:59,987 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2021-12-18 21:07:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:07:59,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2021-12-18 21:07:59,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:59,988 INFO L225 Difference]: With dead ends: 122 [2021-12-18 21:07:59,988 INFO L226 Difference]: Without dead ends: 122 [2021-12-18 21:07:59,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:07:59,988 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 33 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:59,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 292 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:07:59,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-18 21:07:59,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93. [2021-12-18 21:07:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 79 states have internal predecessors, (81), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:07:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-12-18 21:07:59,991 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 46 [2021-12-18 21:07:59,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:59,991 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-12-18 21:07:59,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:07:59,992 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-12-18 21:07:59,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-18 21:07:59,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:59,992 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-18 21:08:00,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-12-18 21:08:00,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:08:00,199 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:08:00,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:00,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1744021614, now seen corresponding path program 1 times [2021-12-18 21:08:00,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:00,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854175974] [2021-12-18 21:08:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:00,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:00,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:00,201 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:08:00,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-12-18 21:08:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:00,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 21:08:00,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:00,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:08:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:08:00,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:08:00,408 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:00,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854175974] [2021-12-18 21:08:00,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854175974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:08:00,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:08:00,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:08:00,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105596966] [2021-12-18 21:08:00,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:08:00,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:08:00,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:08:00,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:08:00,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:08:00,410 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:08:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:08:00,519 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2021-12-18 21:08:00,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:08:00,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2021-12-18 21:08:00,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:08:00,520 INFO L225 Difference]: With dead ends: 92 [2021-12-18 21:08:00,520 INFO L226 Difference]: Without dead ends: 92 [2021-12-18 21:08:00,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:08:00,521 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 5 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:08:00,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 255 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2021-12-18 21:08:00,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-18 21:08:00,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-12-18 21:08:00,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1764705882352942) internal successors, (80), 78 states have internal predecessors, (80), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:08:00,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2021-12-18 21:08:00,523 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 47 [2021-12-18 21:08:00,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:08:00,524 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2021-12-18 21:08:00,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:08:00,524 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2021-12-18 21:08:00,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-18 21:08:00,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:00,524 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-18 21:08:00,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-12-18 21:08:00,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:08:00,734 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:08:00,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:00,735 INFO L85 PathProgramCache]: Analyzing trace with hash -967522539, now seen corresponding path program 1 times [2021-12-18 21:08:00,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:00,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075057432] [2021-12-18 21:08:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:00,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:00,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:00,736 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:08:00,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-12-18 21:08:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:00,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 21:08:00,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:01,011 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:08:01,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 21:08:01,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:08:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:08:01,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:08:01,202 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:01,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075057432] [2021-12-18 21:08:01,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075057432] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:08:01,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:08:01,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-18 21:08:01,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947895557] [2021-12-18 21:08:01,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:08:01,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 21:08:01,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:08:01,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 21:08:01,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-18 21:08:01,204 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:08:01,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:08:01,505 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2021-12-18 21:08:01,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 21:08:01,505 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 49 [2021-12-18 21:08:01,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:08:01,506 INFO L225 Difference]: With dead ends: 115 [2021-12-18 21:08:01,506 INFO L226 Difference]: Without dead ends: 115 [2021-12-18 21:08:01,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-12-18 21:08:01,506 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 102 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:08:01,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 419 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 231 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2021-12-18 21:08:01,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-18 21:08:01,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 89. [2021-12-18 21:08:01,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 75 states have internal predecessors, (77), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:08:01,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-12-18 21:08:01,509 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 49 [2021-12-18 21:08:01,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:08:01,510 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-12-18 21:08:01,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:08:01,510 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-12-18 21:08:01,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 21:08:01,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:01,511 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:08:01,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-12-18 21:08:01,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:08:01,719 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:08:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:01,720 INFO L85 PathProgramCache]: Analyzing trace with hash 921264785, now seen corresponding path program 1 times [2021-12-18 21:08:01,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:01,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771419916] [2021-12-18 21:08:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:01,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:01,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:01,721 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:08:01,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-12-18 21:08:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:01,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 21:08:01,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:02,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 21:08:02,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 21:08:02,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:08:02,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:08:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:08:02,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:08:02,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-12-18 21:08:02,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:08:02,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:08:02,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-12-18 21:08:02,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:08:02,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:08:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 21:08:02,993 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:02,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771419916] [2021-12-18 21:08:02,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771419916] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-18 21:08:02,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 21:08:02,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 19 [2021-12-18 21:08:02,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283809745] [2021-12-18 21:08:02,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:08:02,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 21:08:02,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:08:02,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 21:08:02,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-12-18 21:08:02,995 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:08:03,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:08:03,587 INFO L93 Difference]: Finished difference Result 133 states and 132 transitions. [2021-12-18 21:08:03,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 21:08:03,587 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2021-12-18 21:08:03,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:08:03,588 INFO L225 Difference]: With dead ends: 133 [2021-12-18 21:08:03,588 INFO L226 Difference]: Without dead ends: 133 [2021-12-18 21:08:03,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-12-18 21:08:03,590 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 204 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:08:03,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 535 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:08:03,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-18 21:08:03,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 95. [2021-12-18 21:08:03,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 81 states have internal predecessors, (83), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:08:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-12-18 21:08:03,594 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 51 [2021-12-18 21:08:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:08:03,594 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-12-18 21:08:03,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:08:03,595 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-12-18 21:08:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 21:08:03,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:03,595 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:08:03,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-12-18 21:08:03,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:08:03,796 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:08:03,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:03,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1505554682, now seen corresponding path program 1 times [2021-12-18 21:08:03,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:03,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267873816] [2021-12-18 21:08:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:03,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:03,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:03,797 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:08:03,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-12-18 21:08:03,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:03,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:08:03,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:08:04,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:08:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:08:04,129 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:04,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267873816] [2021-12-18 21:08:04,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267873816] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:08:04,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:08:04,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-12-18 21:08:04,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874154753] [2021-12-18 21:08:04,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:08:04,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:08:04,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:08:04,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:08:04,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:08:04,131 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:08:04,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:08:04,148 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-12-18 21:08:04,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:08:04,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2021-12-18 21:08:04,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:08:04,149 INFO L225 Difference]: With dead ends: 94 [2021-12-18 21:08:04,149 INFO L226 Difference]: Without dead ends: 94 [2021-12-18 21:08:04,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:08:04,150 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 28 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:08:04,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 225 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:08:04,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-18 21:08:04,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-12-18 21:08:04,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 80 states have internal predecessors, (82), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:08:04,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2021-12-18 21:08:04,152 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 52 [2021-12-18 21:08:04,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:08:04,152 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2021-12-18 21:08:04,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:08:04,153 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2021-12-18 21:08:04,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-18 21:08:04,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:04,153 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:08:04,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-12-18 21:08:04,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:08:04,363 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:08:04,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:04,363 INFO L85 PathProgramCache]: Analyzing trace with hash 572445235, now seen corresponding path program 1 times [2021-12-18 21:08:04,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:04,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546008690] [2021-12-18 21:08:04,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:04,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:04,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:04,365 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:08:04,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-12-18 21:08:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:04,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:08:04,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:08:04,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:08:05,139 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:08:05,139 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:05,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546008690] [2021-12-18 21:08:05,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546008690] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:08:05,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:08:05,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-18 21:08:05,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414585993] [2021-12-18 21:08:05,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:08:05,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:08:05,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:08:05,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:08:05,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:08:05,141 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-18 21:08:05,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:08:05,186 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2021-12-18 21:08:05,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:08:05,187 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 53 [2021-12-18 21:08:05,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:08:05,187 INFO L225 Difference]: With dead ends: 97 [2021-12-18 21:08:05,187 INFO L226 Difference]: Without dead ends: 97 [2021-12-18 21:08:05,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:08:05,188 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 76 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:08:05,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 306 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 50 Unchecked, 0.0s Time] [2021-12-18 21:08:05,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-18 21:08:05,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-12-18 21:08:05,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 83 states have internal predecessors, (85), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:08:05,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-12-18 21:08:05,190 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 53 [2021-12-18 21:08:05,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:08:05,191 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-12-18 21:08:05,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-18 21:08:05,191 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-12-18 21:08:05,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 21:08:05,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:05,191 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-18 21:08:05,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-12-18 21:08:05,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:08:05,392 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:08:05,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:05,392 INFO L85 PathProgramCache]: Analyzing trace with hash -928199467, now seen corresponding path program 1 times [2021-12-18 21:08:05,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:05,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037826973] [2021-12-18 21:08:05,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:05,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:05,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:05,394 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:08:05,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-12-18 21:08:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:05,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-18 21:08:05,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:05,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 21:08:05,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:08:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-18 21:08:05,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:08:06,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-12-18 21:08:06,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-12-18 21:08:06,484 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:08:06,484 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:06,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037826973] [2021-12-18 21:08:06,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037826973] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-18 21:08:06,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 21:08:06,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15] total 22 [2021-12-18 21:08:06,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770072135] [2021-12-18 21:08:06,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:08:06,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 21:08:06,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:08:06,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 21:08:06,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-12-18 21:08:06,486 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:08:07,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:08:07,057 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2021-12-18 21:08:07,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 21:08:07,060 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2021-12-18 21:08:07,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:08:07,060 INFO L225 Difference]: With dead ends: 96 [2021-12-18 21:08:07,060 INFO L226 Difference]: Without dead ends: 96 [2021-12-18 21:08:07,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-12-18 21:08:07,061 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 201 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:08:07,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 462 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:08:07,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-18 21:08:07,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-18 21:08:07,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 75 states have (on average 1.12) internal successors, (84), 82 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:08:07,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-12-18 21:08:07,064 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 54 [2021-12-18 21:08:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:08:07,064 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-12-18 21:08:07,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:08:07,065 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-12-18 21:08:07,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 21:08:07,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:07,065 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:08:07,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-12-18 21:08:07,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:08:07,276 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:08:07,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:07,276 INFO L85 PathProgramCache]: Analyzing trace with hash 565933224, now seen corresponding path program 1 times [2021-12-18 21:08:07,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:07,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832271692] [2021-12-18 21:08:07,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:07,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:07,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:07,278 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:08:07,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-12-18 21:08:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:07,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:08:07,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:07,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:08:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:08:07,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:08:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:08:07,687 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:07,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832271692] [2021-12-18 21:08:07,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832271692] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:08:07,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:08:07,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-12-18 21:08:07,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970054805] [2021-12-18 21:08:07,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:08:07,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:08:07,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:08:07,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:08:07,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:08:07,689 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 21:08:07,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:08:07,791 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2021-12-18 21:08:07,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:08:07,791 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2021-12-18 21:08:07,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:08:07,792 INFO L225 Difference]: With dead ends: 97 [2021-12-18 21:08:07,792 INFO L226 Difference]: Without dead ends: 97 [2021-12-18 21:08:07,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:08:07,792 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 20 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:08:07,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 204 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2021-12-18 21:08:07,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-18 21:08:07,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-12-18 21:08:07,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 76 states have (on average 1.118421052631579) internal successors, (85), 83 states have internal predecessors, (85), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:08:07,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-12-18 21:08:07,795 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 54 [2021-12-18 21:08:07,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:08:07,795 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-12-18 21:08:07,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 21:08:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-12-18 21:08:07,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-18 21:08:07,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:07,796 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-18 21:08:07,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-12-18 21:08:08,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:08:08,008 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:08:08,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:08,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1290587706, now seen corresponding path program 1 times [2021-12-18 21:08:08,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:08,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29927344] [2021-12-18 21:08:08,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:08,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:08,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:08,010 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:08:08,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-12-18 21:08:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:08,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-18 21:08:08,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:08,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 21:08:09,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:08:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:08:09,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:08:09,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-12-18 21:08:09,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-12-18 21:08:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 21:08:10,082 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:10,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29927344] [2021-12-18 21:08:10,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29927344] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-18 21:08:10,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 21:08:10,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [18] total 31 [2021-12-18 21:08:10,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832887126] [2021-12-18 21:08:10,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:08:10,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 21:08:10,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:08:10,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 21:08:10,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-12-18 21:08:10,084 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:08:12,355 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 21:08:13,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:08:13,283 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-12-18 21:08:13,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 21:08:13,284 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 55 [2021-12-18 21:08:13,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:08:13,285 INFO L225 Difference]: With dead ends: 108 [2021-12-18 21:08:13,285 INFO L226 Difference]: Without dead ends: 108 [2021-12-18 21:08:13,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=219, Invalid=1341, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 21:08:13,286 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 205 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-18 21:08:13,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 482 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 318 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-12-18 21:08:13,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-18 21:08:13,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 96. [2021-12-18 21:08:13,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 76 states have (on average 1.105263157894737) internal successors, (84), 82 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:08:13,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-12-18 21:08:13,288 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 55 [2021-12-18 21:08:13,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:08:13,288 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-12-18 21:08:13,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:08:13,289 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-12-18 21:08:13,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 21:08:13,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:13,289 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-18 21:08:13,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-12-18 21:08:13,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:08:13,495 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:08:13,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:13,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1353759607, now seen corresponding path program 1 times [2021-12-18 21:08:13,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:13,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733049825] [2021-12-18 21:08:13,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:13,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:13,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:13,497 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:08:13,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-12-18 21:08:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:13,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-18 21:08:13,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:13,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 21:08:13,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-18 21:08:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 21:08:14,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:08:14,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-18 21:08:14,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-18 21:08:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:08:14,787 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:14,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733049825] [2021-12-18 21:08:14,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733049825] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-18 21:08:14,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 21:08:14,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [17] total 24 [2021-12-18 21:08:14,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790554989] [2021-12-18 21:08:14,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:08:14,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 21:08:14,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:08:14,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 21:08:14,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-12-18 21:08:14,788 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:08:15,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:08:15,513 INFO L93 Difference]: Finished difference Result 108 states and 107 transitions. [2021-12-18 21:08:15,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 21:08:15,514 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 56 [2021-12-18 21:08:15,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:08:15,515 INFO L225 Difference]: With dead ends: 108 [2021-12-18 21:08:15,515 INFO L226 Difference]: Without dead ends: 108 [2021-12-18 21:08:15,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-12-18 21:08:15,516 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 188 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:08:15,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 598 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 21:08:15,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-18 21:08:15,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 96. [2021-12-18 21:08:15,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 82 states have internal predecessors, (83), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:08:15,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2021-12-18 21:08:15,518 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 56 [2021-12-18 21:08:15,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:08:15,518 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2021-12-18 21:08:15,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:08:15,519 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2021-12-18 21:08:15,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 21:08:15,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:15,519 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-18 21:08:15,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2021-12-18 21:08:15,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:08:15,720 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-12-18 21:08:15,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:15,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1353513335, now seen corresponding path program 1 times [2021-12-18 21:08:15,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:15,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978647894] [2021-12-18 21:08:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:15,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:15,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:15,722 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:08:15,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-12-18 21:08:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-18 21:08:15,893 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-18 21:08:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-18 21:08:16,039 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-12-18 21:08:16,039 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-18 21:08:16,040 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (29 of 30 remaining) [2021-12-18 21:08:16,042 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (28 of 30 remaining) [2021-12-18 21:08:16,042 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (27 of 30 remaining) [2021-12-18 21:08:16,042 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (26 of 30 remaining) [2021-12-18 21:08:16,042 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (25 of 30 remaining) [2021-12-18 21:08:16,042 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (24 of 30 remaining) [2021-12-18 21:08:16,042 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (23 of 30 remaining) [2021-12-18 21:08:16,043 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (22 of 30 remaining) [2021-12-18 21:08:16,043 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (21 of 30 remaining) [2021-12-18 21:08:16,043 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (20 of 30 remaining) [2021-12-18 21:08:16,043 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (19 of 30 remaining) [2021-12-18 21:08:16,043 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE (18 of 30 remaining) [2021-12-18 21:08:16,043 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE (17 of 30 remaining) [2021-12-18 21:08:16,043 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (16 of 30 remaining) [2021-12-18 21:08:16,044 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (15 of 30 remaining) [2021-12-18 21:08:16,044 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (14 of 30 remaining) [2021-12-18 21:08:16,044 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE (13 of 30 remaining) [2021-12-18 21:08:16,044 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (12 of 30 remaining) [2021-12-18 21:08:16,044 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (11 of 30 remaining) [2021-12-18 21:08:16,044 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE (10 of 30 remaining) [2021-12-18 21:08:16,045 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE (9 of 30 remaining) [2021-12-18 21:08:16,045 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE (8 of 30 remaining) [2021-12-18 21:08:16,045 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE (7 of 30 remaining) [2021-12-18 21:08:16,045 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE (6 of 30 remaining) [2021-12-18 21:08:16,045 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE (5 of 30 remaining) [2021-12-18 21:08:16,045 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE (4 of 30 remaining) [2021-12-18 21:08:16,046 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE (3 of 30 remaining) [2021-12-18 21:08:16,046 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK (2 of 30 remaining) [2021-12-18 21:08:16,046 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_i2c_set_clientdataErr0REQUIRES_VIOLATION (1 of 30 remaining) [2021-12-18 21:08:16,046 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_i2c_set_clientdataErr1REQUIRES_VIOLATION (0 of 30 remaining) [2021-12-18 21:08:16,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-12-18 21:08:16,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:08:16,261 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:08:16,263 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-18 21:08:16,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 09:08:16 BoogieIcfgContainer [2021-12-18 21:08:16,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-18 21:08:16,321 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-18 21:08:16,321 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-18 21:08:16,321 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-18 21:08:16,321 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:04:44" (3/4) ... [2021-12-18 21:08:16,322 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-18 21:08:16,383 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-18 21:08:16,385 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-18 21:08:16,386 INFO L158 Benchmark]: Toolchain (without parser) took 213630.04ms. Allocated memory was 58.7MB in the beginning and 92.3MB in the end (delta: 33.6MB). Free memory was 36.0MB in the beginning and 52.5MB in the end (delta: -16.4MB). Peak memory consumption was 18.3MB. Max. memory is 16.1GB. [2021-12-18 21:08:16,386 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 58.7MB. Free memory is still 40.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 21:08:16,386 INFO L158 Benchmark]: CACSL2BoogieTranslator took 603.30ms. Allocated memory was 58.7MB in the beginning and 75.5MB in the end (delta: 16.8MB). Free memory was 35.9MB in the beginning and 54.3MB in the end (delta: -18.5MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. [2021-12-18 21:08:16,386 INFO L158 Benchmark]: Boogie Procedure Inliner took 73.58ms. Allocated memory is still 75.5MB. Free memory was 54.3MB in the beginning and 51.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 21:08:16,387 INFO L158 Benchmark]: Boogie Preprocessor took 55.58ms. Allocated memory is still 75.5MB. Free memory was 51.6MB in the beginning and 50.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 21:08:16,387 INFO L158 Benchmark]: RCFGBuilder took 564.12ms. Allocated memory is still 75.5MB. Free memory was 49.8MB in the beginning and 53.4MB in the end (delta: -3.6MB). Peak memory consumption was 15.4MB. Max. memory is 16.1GB. [2021-12-18 21:08:16,387 INFO L158 Benchmark]: TraceAbstraction took 212263.60ms. Allocated memory was 75.5MB in the beginning and 92.3MB in the end (delta: 16.8MB). Free memory was 53.0MB in the beginning and 57.6MB in the end (delta: -4.5MB). Peak memory consumption was 49.1MB. Max. memory is 16.1GB. [2021-12-18 21:08:16,387 INFO L158 Benchmark]: Witness Printer took 64.97ms. Allocated memory is still 92.3MB. Free memory was 57.6MB in the beginning and 52.5MB in the end (delta: 5.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-18 21:08:16,388 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 58.7MB. Free memory is still 40.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 603.30ms. Allocated memory was 58.7MB in the beginning and 75.5MB in the end (delta: 16.8MB). Free memory was 35.9MB in the beginning and 54.3MB in the end (delta: -18.5MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 73.58ms. Allocated memory is still 75.5MB. Free memory was 54.3MB in the beginning and 51.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.58ms. Allocated memory is still 75.5MB. Free memory was 51.6MB in the beginning and 50.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 564.12ms. Allocated memory is still 75.5MB. Free memory was 49.8MB in the beginning and 53.4MB in the end (delta: -3.6MB). Peak memory consumption was 15.4MB. Max. memory is 16.1GB. * TraceAbstraction took 212263.60ms. Allocated memory was 75.5MB in the beginning and 92.3MB in the end (delta: 16.8MB). Free memory was 53.0MB in the beginning and 57.6MB in the end (delta: -4.5MB). Peak memory consumption was 49.1MB. Max. memory is 16.1GB. * Witness Printer took 64.97ms. Allocated memory is still 92.3MB. Free memory was 57.6MB in the beginning and 52.5MB in the end (delta: 5.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 799]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; VAL [ldv_global_msg_list={1:0}] [L824] CALL entry_point() [L803] CALL, EXPR ldv_malloc(sizeof(struct ldv_i2c_client)) VAL [\old(size)=20, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L803] RET, EXPR ldv_malloc(sizeof(struct ldv_i2c_client)) VAL [ldv_global_msg_list={1:0}, ldv_malloc(sizeof(struct ldv_i2c_client))={10:0}] [L803] struct ldv_i2c_client *c11 = (struct ldv_i2c_client *)ldv_malloc(sizeof(struct ldv_i2c_client)); [L804] COND FALSE !(!c11) VAL [c11={10:0}, ldv_global_msg_list={1:0}] [L806] CALL, EXPR ldv_malloc(sizeof(struct ldv_m88ts2022_config)) VAL [\old(size)=4, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L806] RET, EXPR ldv_malloc(sizeof(struct ldv_m88ts2022_config)) VAL [c11={10:0}, ldv_global_msg_list={1:0}, ldv_malloc(sizeof(struct ldv_m88ts2022_config))={5:0}] [L805-L806] struct ldv_m88ts2022_config *cfg = (struct ldv_m88ts2022_config *) ldv_malloc(sizeof(struct ldv_m88ts2022_config)); [L807] COND FALSE !(!cfg) VAL [c11={10:0}, cfg={5:0}, ldv_global_msg_list={1:0}] [L808] c11->dev.platform_data = cfg VAL [c11={10:0}, cfg={5:0}, ldv_global_msg_list={1:0}] [L810] CALL, EXPR ldv_malloc(sizeof(struct ldv_dvb_frontend)) VAL [\old(size)=4, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L810] RET, EXPR ldv_malloc(sizeof(struct ldv_dvb_frontend)) VAL [c11={10:0}, cfg={5:0}, ldv_global_msg_list={1:0}, ldv_malloc(sizeof(struct ldv_dvb_frontend))={2:0}] [L809-L810] struct ldv_dvb_frontend *fe = (struct ldv_dvb_frontend *) ldv_malloc(sizeof(struct ldv_dvb_frontend)); [L811] COND FALSE !(!fe) VAL [c11={10:0}, cfg={5:0}, fe={2:0}, ldv_global_msg_list={1:0}] [L812] cfg->fe = fe VAL [c11={10:0}, cfg={5:0}, fe={2:0}, ldv_global_msg_list={1:0}] [L813] CALL alloc_2_11(c11) [L784] EXPR client->dev.platform_data VAL [client={10:0}, client={10:0}, client->dev.platform_data={5:0}, ldv_global_msg_list={1:0}] [L784] struct ldv_m88ts2022_config *cfg = client->dev.platform_data; [L785] EXPR cfg->fe VAL [cfg={5:0}, cfg->fe={2:0}, client={10:0}, client={10:0}, ldv_global_msg_list={1:0}] [L785] struct ldv_dvb_frontend *fe = cfg->fe; [L786] CALL, EXPR ldv_malloc(sizeof(struct Data11)) VAL [\old(size)=12, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L786] RET, EXPR ldv_malloc(sizeof(struct Data11)) VAL [cfg={5:0}, client={10:0}, client={10:0}, fe={2:0}, ldv_global_msg_list={1:0}, ldv_malloc(sizeof(struct Data11))={3:0}] [L786] struct Data11 *priv = (struct Data11*)ldv_malloc(sizeof(struct Data11)); [L787] COND FALSE !(!priv) VAL [cfg={5:0}, client={10:0}, client={10:0}, fe={2:0}, ldv_global_msg_list={1:0}, priv={3:0}] [L788] fe->tuner_priv = priv VAL [cfg={5:0}, client={10:0}, client={10:0}, fe={2:0}, ldv_global_msg_list={1:0}, priv={3:0}] [L789] CALL ldv_i2c_set_clientdata(client, priv) VAL [ldv_global_msg_list={1:0}] [L778] CALL ldv_dev_set_drvdata(&dev->dev, data) [L623] dev->driver_data = data VAL [data={3:0}, data={3:0}, dev={10:0}, dev={10:0}, ldv_global_msg_list={1:0}] [L778] RET ldv_dev_set_drvdata(&dev->dev, data) [L789] RET ldv_i2c_set_clientdata(client, priv) VAL [cfg={5:0}, client={10:0}, client={10:0}, fe={2:0}, ldv_global_msg_list={1:0}, priv={3:0}] [L790] free(priv) VAL [cfg={5:0}, client={10:0}, client={10:0}, fe={2:0}, ldv_global_msg_list={1:0}, priv={3:0}] [L790] free(priv) VAL [cfg={5:0}, client={10:0}, client={10:0}, fe={2:0}, ldv_global_msg_list={1:0}, priv={3:0}] [L790] free(priv) [L791] return 0; VAL [\result=0, cfg={5:0}, client={10:0}, client={10:0}, fe={2:0}, ldv_global_msg_list={1:0}, priv={3:0}] [L813] RET alloc_2_11(c11) [L814] CALL free_11(c11) [L797] CALL, EXPR ldv_i2c_get_clientdata(client) [L774] CALL, EXPR ldv_dev_get_drvdata(&dev->dev) [L619] EXPR dev->driver_data VAL [dev={10:0}, dev={10:0}, dev->driver_data={3:0}, ldv_global_msg_list={1:0}] [L619] return dev->driver_data; [L774] RET, EXPR ldv_dev_get_drvdata(&dev->dev) [L774] return ldv_dev_get_drvdata(&dev->dev); [L797] RET, EXPR ldv_i2c_get_clientdata(client) [L797] void *priv = (struct Data11*)ldv_i2c_get_clientdata(client); [L798] COND TRUE \read(*priv) VAL [client={10:0}, client={10:0}, ldv_global_msg_list={1:0}, priv={3:0}] [L799] free(priv) VAL [client={10:0}, client={10:0}, ldv_global_msg_list={1:0}, priv={3:0}] [L799] free(priv) VAL [client={10:0}, client={10:0}, ldv_global_msg_list={1:0}, priv={3:0}] [L799] free(priv) VAL [client={10:0}, client={10:0}, ldv_global_msg_list={1:0}, priv={3:0}] - UnprovableResult [Line: 808]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 808]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 812]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 812]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 784]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 784]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 785]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 785]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 790]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 790]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 790]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 619]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 619]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 799]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 799]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 815]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 815]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 815]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 817]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 817]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 817]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 819]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 819]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 819]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 823]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 90 locations, 30 error locations. Started 1 CEGAR loops. OverallTime: 212.2s, OverallIterations: 41, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 61.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 3629 SdHoareTripleChecker+Valid, 13.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3559 mSDsluCounter, 19419 SdHoareTripleChecker+Invalid, 11.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2788 IncrementalHoareTripleChecker+Unchecked, 16086 mSDsCounter, 398 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8718 IncrementalHoareTripleChecker+Invalid, 11905 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 398 mSolverCounterUnsat, 3333 mSDtfsCounter, 8718 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2517 GetRequests, 1844 SyntacticMatches, 77 SemanticMatches, 596 ConstructedPredicates, 10 IntricatePredicates, 4 DeprecatedPredicates, 3554 ImplicationChecksByTransitivity, 163.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=206occurred in iteration=10, InterpolantAutomatonStates: 381, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 40 MinimizatonAttempts, 1228 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 134.1s InterpolantComputationTime, 1809 NumberOfCodeBlocks, 1809 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 2197 ConstructedInterpolants, 350 QuantifiedInterpolants, 15514 SizeOfPredicates, 388 NumberOfNonLiveVariables, 6944 ConjunctsInSsa, 1086 ConjunctsInUnsatCore, 63 InterpolantComputations, 21 PerfectInterpolantSequences, 820/1060 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-18 21:08:16,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free)