./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/list-properties/list_search-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-properties/list_search-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:08:22,902 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:08:22,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:08:22,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:08:22,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:08:22,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:08:22,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:08:22,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:08:22,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:08:22,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:08:22,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:08:22,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:08:22,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:08:22,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:08:22,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:08:22,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:08:22,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:08:22,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:08:22,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:08:22,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:08:22,978 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:08:22,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:08:22,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:08:22,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:08:22,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:08:22,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:08:22,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:08:22,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:08:22,993 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:08:22,993 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:08:22,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:08:22,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:08:22,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:08:22,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:08:22,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:08:22,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:08:22,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:08:23,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:08:23,000 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:08:23,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:08:23,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:08:23,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:08:23,004 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2022-07-12 18:08:23,028 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:08:23,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:08:23,029 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:08:23,029 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:08:23,030 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:08:23,030 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:08:23,031 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:08:23,031 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:08:23,031 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:08:23,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:08:23,032 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:08:23,033 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:08:23,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:08:23,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:08:23,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:08:23,033 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:08:23,033 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:08:23,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:08:23,034 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:08:23,034 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:08:23,034 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:08:23,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:08:23,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:08:23,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:08:23,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:08:23,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:08:23,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:08:23,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:08:23,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:08:23,036 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 [2022-07-12 18:08:23,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:08:23,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:08:23,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:08:23,315 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:08:23,319 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:08:23,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_search-1.i [2022-07-12 18:08:23,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61b4fe786/61366c9e0fda4a26a19d14612fc572bd/FLAGaca3a4be8 [2022-07-12 18:08:23,863 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:08:23,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-1.i [2022-07-12 18:08:23,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61b4fe786/61366c9e0fda4a26a19d14612fc572bd/FLAGaca3a4be8 [2022-07-12 18:08:24,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61b4fe786/61366c9e0fda4a26a19d14612fc572bd [2022-07-12 18:08:24,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:08:24,378 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:08:24,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:08:24,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:08:24,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:08:24,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:08:24" (1/1) ... [2022-07-12 18:08:24,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59fda0c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:24, skipping insertion in model container [2022-07-12 18:08:24,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:08:24" (1/1) ... [2022-07-12 18:08:24,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:08:24,476 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:08:24,736 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2022-07-12 18:08:24,932 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:08:24,942 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-12 18:08:24,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4d35cef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:24, skipping insertion in model container [2022-07-12 18:08:24,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:08:24,950 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-12 18:08:24,952 INFO L158 Benchmark]: Toolchain (without parser) took 573.08ms. Allocated memory was 90.2MB in the beginning and 115.3MB in the end (delta: 25.2MB). Free memory was 60.6MB in the beginning and 88.9MB in the end (delta: -28.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-12 18:08:24,952 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 90.2MB. Free memory is still 49.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 18:08:24,953 INFO L158 Benchmark]: CACSL2BoogieTranslator took 567.52ms. Allocated memory was 90.2MB in the beginning and 115.3MB in the end (delta: 25.2MB). Free memory was 60.4MB in the beginning and 88.9MB in the end (delta: -28.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-12 18:08:24,954 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 90.2MB. Free memory is still 49.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 567.52ms. Allocated memory was 90.2MB in the beginning and 115.3MB in the end (delta: 25.2MB). Free memory was 60.4MB in the beginning and 88.9MB in the end (delta: -28.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 542]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-properties/list_search-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:08:28,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:08:28,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:08:28,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:08:28,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:08:28,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:08:28,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:08:28,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:08:28,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:08:28,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:08:28,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:08:28,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:08:28,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:08:28,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:08:28,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:08:28,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:08:28,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:08:28,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:08:28,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:08:28,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:08:28,200 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:08:28,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:08:28,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:08:28,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:08:28,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:08:28,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:08:28,218 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:08:28,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:08:28,220 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:08:28,220 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:08:28,221 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:08:28,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:08:28,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:08:28,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:08:28,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:08:28,225 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:08:28,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:08:28,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:08:28,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:08:28,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:08:28,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:08:28,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:08:28,250 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2022-07-12 18:08:28,296 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:08:28,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:08:28,297 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:08:28,297 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:08:28,298 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:08:28,298 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:08:28,299 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:08:28,299 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:08:28,299 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:08:28,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:08:28,300 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:08:28,300 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:08:28,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:08:28,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:08:28,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:08:28,301 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:08:28,302 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:08:28,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:08:28,302 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:08:28,302 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 18:08:28,303 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 18:08:28,303 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:08:28,303 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:08:28,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:08:28,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:08:28,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:08:28,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:08:28,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:08:28,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:08:28,305 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 18:08:28,305 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 18:08:28,305 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 18:08:28,305 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 [2022-07-12 18:08:28,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:08:28,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:08:28,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:08:28,876 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:08:28,876 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:08:28,878 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_search-1.i [2022-07-12 18:08:28,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd2dc198a/e0e5ef1eab53412da4f8b51622814762/FLAGdee88a308 [2022-07-12 18:08:29,600 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:08:29,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-1.i [2022-07-12 18:08:29,622 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd2dc198a/e0e5ef1eab53412da4f8b51622814762/FLAGdee88a308 [2022-07-12 18:08:29,897 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd2dc198a/e0e5ef1eab53412da4f8b51622814762 [2022-07-12 18:08:29,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:08:29,904 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:08:29,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:08:29,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:08:29,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:08:29,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:08:29" (1/1) ... [2022-07-12 18:08:29,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b1c8a71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:29, skipping insertion in model container [2022-07-12 18:08:29,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:08:29" (1/1) ... [2022-07-12 18:08:29,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:08:30,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:08:30,288 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2022-07-12 18:08:30,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:08:30,513 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-12 18:08:30,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:08:30,538 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2022-07-12 18:08:30,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:08:30,614 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:08:30,645 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2022-07-12 18:08:30,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:08:30,728 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:08:30,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30 WrapperNode [2022-07-12 18:08:30,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:08:30,748 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:08:30,748 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:08:30,748 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:08:30,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (1/1) ... [2022-07-12 18:08:30,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (1/1) ... [2022-07-12 18:08:30,876 INFO L137 Inliner]: procedures = 128, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2022-07-12 18:08:30,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:08:30,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:08:30,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:08:30,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:08:30,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (1/1) ... [2022-07-12 18:08:30,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (1/1) ... [2022-07-12 18:08:30,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (1/1) ... [2022-07-12 18:08:30,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (1/1) ... [2022-07-12 18:08:30,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (1/1) ... [2022-07-12 18:08:30,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (1/1) ... [2022-07-12 18:08:30,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (1/1) ... [2022-07-12 18:08:30,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:08:30,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:08:30,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:08:30,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:08:30,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (1/1) ... [2022-07-12 18:08:30,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:08:30,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:08:31,034 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 18:08:31,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 18:08:31,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-12 18:08:31,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 18:08:31,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 18:08:31,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 18:08:31,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 18:08:31,108 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2022-07-12 18:08:31,109 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2022-07-12 18:08:31,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:08:31,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-12 18:08:31,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-12 18:08:31,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:08:31,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:08:31,282 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:08:31,284 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:08:31,712 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:08:31,726 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:08:31,726 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 18:08:31,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:08:31 BoogieIcfgContainer [2022-07-12 18:08:31,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:08:31,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:08:31,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:08:31,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:08:31,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:08:29" (1/3) ... [2022-07-12 18:08:31,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2001691d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:08:31, skipping insertion in model container [2022-07-12 18:08:31,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (2/3) ... [2022-07-12 18:08:31,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2001691d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:08:31, skipping insertion in model container [2022-07-12 18:08:31,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:08:31" (3/3) ... [2022-07-12 18:08:31,742 INFO L111 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2022-07-12 18:08:31,755 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:08:31,756 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2022-07-12 18:08:31,808 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:08:31,817 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@31bf648a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1eef503d [2022-07-12 18:08:31,818 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-07-12 18:08:31,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 57 states have internal predecessors, (64), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:08:31,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-12 18:08:31,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:31,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-12 18:08:31,829 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:08:31,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:31,835 INFO L85 PathProgramCache]: Analyzing trace with hash 48806309, now seen corresponding path program 1 times [2022-07-12 18:08:31,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:31,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214786050] [2022-07-12 18:08:31,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:31,847 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:31,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:31,849 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:31,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-12 18:08:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:32,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:08:32,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:32,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:08:32,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:08:32,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:32,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214786050] [2022-07-12 18:08:32,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214786050] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:08:32,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:08:32,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:08:32,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562869474] [2022-07-12 18:08:32,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:08:32,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:08:32,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:32,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:08:32,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:08:32,172 INFO L87 Difference]: Start difference. First operand has 63 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 57 states have internal predecessors, (64), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:08:32,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:32,342 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-07-12 18:08:32,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:08:32,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-07-12 18:08:32,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:32,351 INFO L225 Difference]: With dead ends: 59 [2022-07-12 18:08:32,351 INFO L226 Difference]: Without dead ends: 57 [2022-07-12 18:08:32,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:08:32,357 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 12 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:32,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 90 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:08:32,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-12 18:08:32,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-12 18:08:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 51 states have internal predecessors, (55), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:08:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2022-07-12 18:08:32,419 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 5 [2022-07-12 18:08:32,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:32,420 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2022-07-12 18:08:32,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:08:32,420 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2022-07-12 18:08:32,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-12 18:08:32,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:32,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-12 18:08:32,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:32,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:08:32,631 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:08:32,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:32,632 INFO L85 PathProgramCache]: Analyzing trace with hash 48806310, now seen corresponding path program 1 times [2022-07-12 18:08:32,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:32,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079456966] [2022-07-12 18:08:32,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:32,632 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:32,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:32,639 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:32,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-12 18:08:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:32,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:08:32,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:32,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:08:32,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:08:32,796 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:32,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079456966] [2022-07-12 18:08:32,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079456966] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:08:32,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:08:32,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:08:32,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627912763] [2022-07-12 18:08:32,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:08:32,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:08:32,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:32,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:08:32,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:08:32,803 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:08:32,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:32,894 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-07-12 18:08:32,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:08:32,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-07-12 18:08:32,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:32,896 INFO L225 Difference]: With dead ends: 53 [2022-07-12 18:08:32,896 INFO L226 Difference]: Without dead ends: 53 [2022-07-12 18:08:32,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:08:32,898 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 8 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:32,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 91 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:08:32,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-12 18:08:32,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-12 18:08:32,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.457142857142857) internal successors, (51), 47 states have internal predecessors, (51), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:08:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-07-12 18:08:32,907 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 5 [2022-07-12 18:08:32,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:32,908 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-07-12 18:08:32,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:08:32,908 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-07-12 18:08:32,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 18:08:32,910 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:32,910 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:08:32,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:33,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:08:33,120 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:08:33,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:33,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1546335105, now seen corresponding path program 1 times [2022-07-12 18:08:33,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:33,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026185162] [2022-07-12 18:08:33,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:33,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:33,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:33,132 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:33,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-12 18:08:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:33,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:08:33,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 18:08:33,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:08:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 18:08:33,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:33,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026185162] [2022-07-12 18:08:33,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026185162] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:08:33,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:08:33,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-07-12 18:08:33,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259404390] [2022-07-12 18:08:33,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:08:33,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:08:33,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:33,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:08:33,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:08:33,680 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:08:33,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:33,964 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2022-07-12 18:08:33,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:08:33,965 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2022-07-12 18:08:33,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:33,967 INFO L225 Difference]: With dead ends: 72 [2022-07-12 18:08:33,967 INFO L226 Difference]: Without dead ends: 72 [2022-07-12 18:08:33,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:08:33,968 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 98 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:33,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 162 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:08:33,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-12 18:08:33,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2022-07-12 18:08:33,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 53 states have internal predecessors, (57), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 18:08:33,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2022-07-12 18:08:33,984 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 41 [2022-07-12 18:08:33,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:33,984 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2022-07-12 18:08:33,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:08:33,985 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2022-07-12 18:08:33,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 18:08:33,987 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:33,987 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:08:34,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:34,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:08:34,199 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:08:34,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:34,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1413963380, now seen corresponding path program 1 times [2022-07-12 18:08:34,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:34,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74803163] [2022-07-12 18:08:34,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:34,200 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:34,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:34,218 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:34,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-12 18:08:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:34,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:08:34,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:34,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 18:08:34,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:08:34,522 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:34,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74803163] [2022-07-12 18:08:34,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74803163] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:08:34,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:08:34,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:08:34,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553567344] [2022-07-12 18:08:34,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:08:34,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:08:34,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:34,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:08:34,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:08:34,526 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:08:34,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:34,776 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2022-07-12 18:08:34,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:08:34,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-07-12 18:08:34,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:34,778 INFO L225 Difference]: With dead ends: 90 [2022-07-12 18:08:34,778 INFO L226 Difference]: Without dead ends: 90 [2022-07-12 18:08:34,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:08:34,779 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 99 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:34,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 80 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:08:34,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-12 18:08:34,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 65. [2022-07-12 18:08:34,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.425531914893617) internal successors, (67), 58 states have internal predecessors, (67), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 18:08:34,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2022-07-12 18:08:34,792 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 44 [2022-07-12 18:08:34,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:34,793 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2022-07-12 18:08:34,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:08:34,793 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2022-07-12 18:08:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 18:08:34,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:34,797 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:08:34,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:35,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:08:35,010 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:08:35,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:35,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1413963379, now seen corresponding path program 1 times [2022-07-12 18:08:35,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:35,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514631307] [2022-07-12 18:08:35,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:35,011 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:35,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:35,032 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:35,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-12 18:08:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:35,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:08:35,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:35,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 18:08:35,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:08:35,580 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:35,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514631307] [2022-07-12 18:08:35,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514631307] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:08:35,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:08:35,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:08:35,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600317356] [2022-07-12 18:08:35,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:08:35,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:08:35,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:35,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:08:35,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:08:35,583 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:08:36,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:36,047 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2022-07-12 18:08:36,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:08:36,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-07-12 18:08:36,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:36,049 INFO L225 Difference]: With dead ends: 106 [2022-07-12 18:08:36,049 INFO L226 Difference]: Without dead ends: 106 [2022-07-12 18:08:36,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:08:36,050 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 103 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:36,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 91 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:08:36,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-12 18:08:36,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2022-07-12 18:08:36,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 63 states have internal predecessors, (71), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 18:08:36,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2022-07-12 18:08:36,056 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 44 [2022-07-12 18:08:36,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:36,056 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2022-07-12 18:08:36,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:08:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2022-07-12 18:08:36,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 18:08:36,057 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:36,058 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:08:36,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:36,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:08:36,271 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:08:36,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:36,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1662023696, now seen corresponding path program 1 times [2022-07-12 18:08:36,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:36,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919636151] [2022-07-12 18:08:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:36,272 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:36,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:36,276 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:36,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-12 18:08:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:36,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:08:36,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 18:08:36,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:08:36,605 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:36,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919636151] [2022-07-12 18:08:36,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919636151] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:08:36,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:08:36,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:08:36,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333956817] [2022-07-12 18:08:36,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:08:36,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:08:36,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:36,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:08:36,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:08:36,626 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:08:36,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:36,923 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2022-07-12 18:08:36,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:08:36,924 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2022-07-12 18:08:36,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:36,925 INFO L225 Difference]: With dead ends: 106 [2022-07-12 18:08:36,925 INFO L226 Difference]: Without dead ends: 106 [2022-07-12 18:08:36,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:08:36,926 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 109 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:36,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 164 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:08:36,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-12 18:08:36,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2022-07-12 18:08:36,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 63 states have internal predecessors, (70), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 18:08:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2022-07-12 18:08:36,938 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 47 [2022-07-12 18:08:36,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:36,939 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2022-07-12 18:08:36,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:08:36,939 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2022-07-12 18:08:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 18:08:36,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:36,941 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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] [2022-07-12 18:08:36,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:37,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:08:37,157 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:08:37,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:37,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1825916083, now seen corresponding path program 1 times [2022-07-12 18:08:37,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:37,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995782547] [2022-07-12 18:08:37,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:37,171 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:37,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:37,173 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:37,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-12 18:08:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:37,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:08:37,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:37,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 18:08:37,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:08:37,745 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:37,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995782547] [2022-07-12 18:08:37,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995782547] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:08:37,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:08:37,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:08:37,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026174946] [2022-07-12 18:08:37,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:08:37,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:08:37,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:37,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:08:37,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:08:37,756 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:08:38,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:38,210 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2022-07-12 18:08:38,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:08:38,213 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), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2022-07-12 18:08:38,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:38,214 INFO L225 Difference]: With dead ends: 105 [2022-07-12 18:08:38,214 INFO L226 Difference]: Without dead ends: 105 [2022-07-12 18:08:38,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:08:38,215 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 147 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:38,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 139 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:08:38,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-12 18:08:38,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 73. [2022-07-12 18:08:38,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 66 states have internal predecessors, (74), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 18:08:38,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-07-12 18:08:38,225 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 49 [2022-07-12 18:08:38,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:38,226 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-07-12 18:08:38,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:08:38,226 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-07-12 18:08:38,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 18:08:38,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:38,227 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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] [2022-07-12 18:08:38,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:38,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:08:38,438 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:08:38,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:38,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1825916084, now seen corresponding path program 1 times [2022-07-12 18:08:38,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:38,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616150472] [2022-07-12 18:08:38,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:38,439 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:38,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:38,441 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:38,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-12 18:08:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:38,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:08:38,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:38,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 18:08:38,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:08:38,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:38,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616150472] [2022-07-12 18:08:38,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616150472] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:08:38,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:08:38,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:08:38,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189192860] [2022-07-12 18:08:38,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:08:38,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:08:38,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:38,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:08:38,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:08:38,977 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:08:39,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:39,424 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2022-07-12 18:08:39,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:08:39,425 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), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2022-07-12 18:08:39,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:39,426 INFO L225 Difference]: With dead ends: 96 [2022-07-12 18:08:39,426 INFO L226 Difference]: Without dead ends: 96 [2022-07-12 18:08:39,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:08:39,427 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 125 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:39,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 132 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:08:39,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-12 18:08:39,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2022-07-12 18:08:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 69 states have internal predecessors, (77), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 18:08:39,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2022-07-12 18:08:39,438 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 49 [2022-07-12 18:08:39,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:39,438 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2022-07-12 18:08:39,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:08:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2022-07-12 18:08:39,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 18:08:39,442 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:39,442 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:08:39,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:39,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:08:39,655 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:08:39,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:39,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1986857552, now seen corresponding path program 1 times [2022-07-12 18:08:39,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:39,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209436060] [2022-07-12 18:08:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:39,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:39,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:39,658 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:39,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-12 18:08:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:40,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-12 18:08:40,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:40,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:40,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:08:40,420 INFO L356 Elim1Store]: treesize reduction 30, result has 31.8 percent of original size [2022-07-12 18:08:40,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2022-07-12 18:08:40,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-12 18:08:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:08:40,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:08:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:08:41,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:41,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209436060] [2022-07-12 18:08:41,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209436060] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:08:41,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:08:41,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2022-07-12 18:08:41,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143684306] [2022-07-12 18:08:41,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:08:41,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 18:08:41,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:41,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 18:08:41,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:08:41,194 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 18:08:42,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:42,899 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2022-07-12 18:08:42,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:08:42,900 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2022-07-12 18:08:42,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:42,901 INFO L225 Difference]: With dead ends: 127 [2022-07-12 18:08:42,901 INFO L226 Difference]: Without dead ends: 127 [2022-07-12 18:08:42,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2022-07-12 18:08:42,902 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 376 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:42,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 250 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-12 18:08:42,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-12 18:08:42,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2022-07-12 18:08:42,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 76 states have internal predecessors, (87), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:08:42,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2022-07-12 18:08:42,917 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 51 [2022-07-12 18:08:42,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:42,918 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2022-07-12 18:08:42,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 18:08:42,918 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2022-07-12 18:08:42,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 18:08:42,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:42,921 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:08:42,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:43,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:08:43,135 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:08:43,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:43,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1986857553, now seen corresponding path program 1 times [2022-07-12 18:08:43,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:43,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094749324] [2022-07-12 18:08:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:43,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:43,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:43,149 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:43,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-12 18:08:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:43,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 18:08:43,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:43,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:43,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:08:43,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:08:43,965 INFO L356 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2022-07-12 18:08:43,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-07-12 18:08:44,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:08:44,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-12 18:08:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:08:44,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:08:44,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:44,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094749324] [2022-07-12 18:08:44,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094749324] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:08:44,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [430087214] [2022-07-12 18:08:44,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:44,960 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:08:44,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:08:44,963 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:08:44,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-07-12 18:08:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:45,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 18:08:45,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:45,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:45,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:46,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:08:46,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:08:46,479 INFO L356 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2022-07-12 18:08:46,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-12 18:08:46,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-12 18:08:46,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:08:46,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-12 18:08:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:08:46,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:08:49,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [430087214] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:08:49,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:08:49,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-07-12 18:08:49,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431262417] [2022-07-12 18:08:49,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:08:49,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 18:08:49,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:49,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 18:08:49,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-07-12 18:08:49,624 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:08:53,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:53,138 INFO L93 Difference]: Finished difference Result 155 states and 168 transitions. [2022-07-12 18:08:53,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:08:53,140 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2022-07-12 18:08:53,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:53,141 INFO L225 Difference]: With dead ends: 155 [2022-07-12 18:08:53,141 INFO L226 Difference]: Without dead ends: 155 [2022-07-12 18:08:53,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2022-07-12 18:08:53,142 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 455 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:53,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 324 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 496 Invalid, 0 Unknown, 237 Unchecked, 1.7s Time] [2022-07-12 18:08:53,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-12 18:08:53,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 86. [2022-07-12 18:08:53,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 79 states have internal predecessors, (90), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:08:53,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2022-07-12 18:08:53,160 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 51 [2022-07-12 18:08:53,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:53,161 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2022-07-12 18:08:53,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:08:53,161 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2022-07-12 18:08:53,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 18:08:53,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:53,162 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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] [2022-07-12 18:08:53,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:53,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:53,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 18:08:53,576 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:08:53,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:53,576 INFO L85 PathProgramCache]: Analyzing trace with hash -105219752, now seen corresponding path program 1 times [2022-07-12 18:08:53,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:53,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627730069] [2022-07-12 18:08:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:53,577 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:53,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:53,616 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:53,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-12 18:08:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:54,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 18:08:54,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:54,182 INFO L356 Elim1Store]: treesize reduction 157, result has 14.7 percent of original size [2022-07-12 18:08:54,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 36 [2022-07-12 18:08:54,209 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-12 18:08:54,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-12 18:08:54,301 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-12 18:08:54,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 13 [2022-07-12 18:08:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 18:08:54,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:08:54,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:54,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627730069] [2022-07-12 18:08:54,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627730069] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:08:54,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:08:54,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 18:08:54,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82582810] [2022-07-12 18:08:54,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:08:54,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:08:54,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:54,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:08:54,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:08:54,336 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:08:54,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:54,725 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2022-07-12 18:08:54,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:08:54,725 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2022-07-12 18:08:54,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:54,726 INFO L225 Difference]: With dead ends: 83 [2022-07-12 18:08:54,726 INFO L226 Difference]: Without dead ends: 83 [2022-07-12 18:08:54,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:08:54,727 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 16 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:54,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 287 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 130 Invalid, 0 Unknown, 16 Unchecked, 0.3s Time] [2022-07-12 18:08:54,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-12 18:08:54,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-07-12 18:08:54,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.323076923076923) internal successors, (86), 76 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:08:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2022-07-12 18:08:54,737 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 52 [2022-07-12 18:08:54,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:54,737 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2022-07-12 18:08:54,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:08:54,738 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2022-07-12 18:08:54,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 18:08:54,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:54,739 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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, 1, 1, 1] [2022-07-12 18:08:54,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:54,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:08:54,940 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:08:54,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:54,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1534863564, now seen corresponding path program 1 times [2022-07-12 18:08:54,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:54,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188195348] [2022-07-12 18:08:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:54,941 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:54,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:54,943 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:54,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-12 18:08:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:55,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:08:55,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:55,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:08:55,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-12 18:08:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:08:55,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:08:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:08:56,086 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:56,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188195348] [2022-07-12 18:08:56,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188195348] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:08:56,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:08:56,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2022-07-12 18:08:56,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204812734] [2022-07-12 18:08:56,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:08:56,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:08:56,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:56,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:08:56,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:08:56,087 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 18:08:57,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:57,426 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2022-07-12 18:08:57,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 18:08:57,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-07-12 18:08:57,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:57,428 INFO L225 Difference]: With dead ends: 123 [2022-07-12 18:08:57,428 INFO L226 Difference]: Without dead ends: 123 [2022-07-12 18:08:57,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 18:08:57,429 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 258 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:57,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 330 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-12 18:08:57,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-12 18:08:57,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 82. [2022-07-12 18:08:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.296875) internal successors, (83), 75 states have internal predecessors, (83), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:08:57,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2022-07-12 18:08:57,433 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 54 [2022-07-12 18:08:57,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:57,433 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2022-07-12 18:08:57,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 18:08:57,433 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2022-07-12 18:08:57,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-12 18:08:57,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:57,434 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:08:57,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:57,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:08:57,634 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:08:57,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:57,635 INFO L85 PathProgramCache]: Analyzing trace with hash 527248649, now seen corresponding path program 1 times [2022-07-12 18:08:57,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:57,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677120520] [2022-07-12 18:08:57,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:57,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:57,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:57,638 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:57,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-12 18:08:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:58,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-12 18:08:58,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:58,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:08:58,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:08:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 34 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:08:58,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:08:58,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-07-12 18:08:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:08:59,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:59,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677120520] [2022-07-12 18:08:59,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677120520] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:08:59,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:08:59,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2022-07-12 18:08:59,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356816157] [2022-07-12 18:08:59,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:08:59,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 18:08:59,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:59,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 18:08:59,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:08:59,955 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 27 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:09:03,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:09:03,752 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2022-07-12 18:09:03,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 18:09:03,753 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 56 [2022-07-12 18:09:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:09:03,754 INFO L225 Difference]: With dead ends: 139 [2022-07-12 18:09:03,754 INFO L226 Difference]: Without dead ends: 139 [2022-07-12 18:09:03,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=383, Invalid=1969, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 18:09:03,755 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 426 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:09:03,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 527 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-12 18:09:03,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-12 18:09:03,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 82. [2022-07-12 18:09:03,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.28125) internal successors, (82), 75 states have internal predecessors, (82), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:09:03,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2022-07-12 18:09:03,759 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 56 [2022-07-12 18:09:03,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:09:03,766 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2022-07-12 18:09:03,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:09:03,766 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2022-07-12 18:09:03,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-12 18:09:03,767 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:09:03,767 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:09:03,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-12 18:09:03,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:09:03,985 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:09:03,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:09:03,985 INFO L85 PathProgramCache]: Analyzing trace with hash -69599988, now seen corresponding path program 2 times [2022-07-12 18:09:03,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:09:03,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239871680] [2022-07-12 18:09:03,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:09:03,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:09:03,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:09:03,989 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:09:03,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-12 18:09:04,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:09:04,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:09:04,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-12 18:09:04,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:09:04,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:09:04,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:09:04,855 INFO L356 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2022-07-12 18:09:04,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 37 [2022-07-12 18:09:05,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:09:05,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:09:05,340 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-07-12 18:09:05,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2022-07-12 18:09:05,358 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:09:05,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-07-12 18:09:05,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-07-12 18:09:05,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:09:06,017 INFO L356 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-07-12 18:09:06,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 85 [2022-07-12 18:09:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:09:06,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:09:06,745 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:09:06,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-07-12 18:09:06,760 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_113 (_ BitVec 32)) (v_arrayElimArr_2 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (bvadd (bvneg (bvneg (select (store |c_#valid| v_~head~0.base_113 (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_113 v_arrayElimArr_2) c_~head~0.base) (bvadd c_~head~0.offset (_ bv4 32)))))) (_ bv1 1)) (_ bv0 1)) (not (= (select v_arrayElimArr_2 (_ bv4 32)) c_~head~0.base)))) is different from false [2022-07-12 18:09:06,762 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:09:06,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239871680] [2022-07-12 18:09:06,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239871680] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:09:06,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2087621726] [2022-07-12 18:09:06,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:09:06,763 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:09:06,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:09:06,768 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:09:06,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-07-12 18:09:07,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:09:07,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:09:07,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-12 18:09:07,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:09:07,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:09:07,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:09:07,670 INFO L356 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2022-07-12 18:09:07,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 37 [2022-07-12 18:09:07,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:09:08,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:09:08,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:08,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-07-12 18:09:08,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:08,283 INFO L356 Elim1Store]: treesize reduction 45, result has 42.3 percent of original size [2022-07-12 18:09:08,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 61 [2022-07-12 18:09:08,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:09:08,907 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:09:08,907 INFO L390 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 65 treesize of output 32 [2022-07-12 18:09:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 41 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:09:09,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:09:09,487 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:09:09,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-07-12 18:09:09,507 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_4 (Array (_ BitVec 32) (_ BitVec 32))) (v_~head~0.base_119 (_ BitVec 32))) (or (not (= (select v_arrayElimArr_4 (_ bv4 32)) c_~head~0.base)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_~head~0.base_119)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (select (store |c_#valid| v_~head~0.base_119 (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_119 v_arrayElimArr_4) c_~head~0.base) (bvadd c_~head~0.offset (_ bv4 32)))))) (_ bv1 1))))) is different from false [2022-07-12 18:09:09,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2087621726] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:09:09,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:09:09,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2022-07-12 18:09:09,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466673982] [2022-07-12 18:09:09,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:09:09,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 18:09:09,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:09:09,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 18:09:09,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1277, Unknown=5, NotChecked=146, Total=1560 [2022-07-12 18:09:09,511 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 34 states, 33 states have (on average 2.515151515151515) internal successors, (83), 30 states have internal predecessors, (83), 4 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 18:09:10,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:09:10,273 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2022-07-12 18:09:10,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:09:10,274 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.515151515151515) internal successors, (83), 30 states have internal predecessors, (83), 4 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 58 [2022-07-12 18:09:10,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:09:10,274 INFO L225 Difference]: With dead ends: 96 [2022-07-12 18:09:10,275 INFO L226 Difference]: Without dead ends: 96 [2022-07-12 18:09:10,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 111 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=208, Invalid=1772, Unknown=8, NotChecked=174, Total=2162 [2022-07-12 18:09:10,276 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 58 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:09:10,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 474 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 181 Invalid, 0 Unknown, 279 Unchecked, 0.3s Time] [2022-07-12 18:09:10,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-12 18:09:10,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2022-07-12 18:09:10,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 79 states have internal predecessors, (88), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:09:10,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2022-07-12 18:09:10,280 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 58 [2022-07-12 18:09:10,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:09:10,280 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2022-07-12 18:09:10,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.515151515151515) internal successors, (83), 30 states have internal predecessors, (83), 4 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 18:09:10,281 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2022-07-12 18:09:10,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-12 18:09:10,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:09:10,282 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:09:10,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-07-12 18:09:10,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-12 18:09:10,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:09:10,689 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:09:10,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:09:10,689 INFO L85 PathProgramCache]: Analyzing trace with hash -69599987, now seen corresponding path program 2 times [2022-07-12 18:09:10,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:09:10,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1745983693] [2022-07-12 18:09:10,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:09:10,690 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:09:10,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:09:10,691 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:09:10,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-12 18:09:11,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:09:11,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:09:11,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-12 18:09:11,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:09:11,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:09:11,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:09:11,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:09:11,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:09:11,572 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-07-12 18:09:11,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 30 [2022-07-12 18:09:11,592 INFO L356 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2022-07-12 18:09:11,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 37 [2022-07-12 18:09:11,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:09:11,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:09:12,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:12,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-07-12 18:09:12,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:12,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-12 18:09:12,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:12,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-12 18:09:12,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:12,178 INFO L356 Elim1Store]: treesize reduction 4, result has 77.8 percent of original size [2022-07-12 18:09:12,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-07-12 18:09:12,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:09:12,915 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:09:12,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 47 [2022-07-12 18:09:12,930 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:09:12,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-07-12 18:09:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:09:13,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:09:14,204 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:09:14,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-07-12 18:09:14,222 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:09:14,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2022-07-12 18:09:14,229 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:09:14,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-07-12 18:09:14,371 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_~head~0.base_125 (_ BitVec 32))) (or (not (= (bvneg (select |c_#valid| v_~head~0.base_125)) (_ bv0 1))) (forall ((v_arrayElimArr_9 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_8 (Array (_ BitVec 32) (_ BitVec 32)))) (or (let ((.cse0 (bvadd c_~head~0.offset (_ bv4 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_125 v_arrayElimArr_9) c_~head~0.base) .cse0)) (select (store |c_#length| v_~head~0.base_125 (_ bv8 32)) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_125 v_arrayElimArr_8) c_~head~0.base) .cse0)))) (not (= c_~head~0.offset (select v_arrayElimArr_9 (_ bv4 32)))) (not (= (select v_arrayElimArr_8 (_ bv4 32)) c_~head~0.base)))))) (forall ((v_~head~0.base_125 (_ BitVec 32))) (or (forall ((v_arrayElimArr_7 (Array (_ BitVec 32) (_ BitVec 32)))) (or (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_125 v_arrayElimArr_7) c_~head~0.base) (bvadd c_~head~0.offset (_ bv4 32))))) (bvule .cse1 (bvadd (_ bv4 32) .cse1))) (not (= c_~head~0.offset (select v_arrayElimArr_7 (_ bv4 32)))))) (not (= (bvneg (select |c_#valid| v_~head~0.base_125)) (_ bv0 1)))))) is different from false [2022-07-12 18:09:14,376 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:09:14,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1745983693] [2022-07-12 18:09:14,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1745983693] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:09:14,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1896951935] [2022-07-12 18:09:14,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:09:14,377 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:09:14,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:09:14,378 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:09:14,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-07-12 18:09:14,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:09:14,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:09:14,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-12 18:09:14,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:09:14,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:09:14,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:09:15,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:09:15,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:09:15,176 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-07-12 18:09:15,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 30 [2022-07-12 18:09:15,207 INFO L356 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2022-07-12 18:09:15,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 37 [2022-07-12 18:09:15,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:09:15,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:09:15,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:15,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-12 18:09:15,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:15,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-07-12 18:09:15,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:15,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-12 18:09:15,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:15,580 INFO L356 Elim1Store]: treesize reduction 4, result has 77.8 percent of original size [2022-07-12 18:09:15,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-07-12 18:09:16,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:09:16,081 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:09:16,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 47 [2022-07-12 18:09:16,094 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:09:16,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-07-12 18:09:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:09:16,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:09:16,663 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:09:16,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2022-07-12 18:09:16,673 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:09:16,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-07-12 18:09:16,698 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:09:16,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-07-12 18:09:22,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1896951935] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:09:22,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:09:22,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2022-07-12 18:09:22,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684217519] [2022-07-12 18:09:22,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:09:22,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 18:09:22,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:09:22,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 18:09:22,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=627, Unknown=16, NotChecked=50, Total=756 [2022-07-12 18:09:22,285 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 18:09:29,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:09:29,167 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2022-07-12 18:09:29,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:09:29,168 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 58 [2022-07-12 18:09:29,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:09:29,170 INFO L225 Difference]: With dead ends: 104 [2022-07-12 18:09:29,170 INFO L226 Difference]: Without dead ends: 104 [2022-07-12 18:09:29,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 122 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=147, Invalid=1309, Unknown=30, NotChecked=74, Total=1560 [2022-07-12 18:09:29,172 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 26 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:09:29,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 495 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 169 Invalid, 0 Unknown, 331 Unchecked, 1.2s Time] [2022-07-12 18:09:29,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-12 18:09:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2022-07-12 18:09:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 79 states have internal predecessors, (87), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:09:29,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2022-07-12 18:09:29,180 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 58 [2022-07-12 18:09:29,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:09:29,181 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2022-07-12 18:09:29,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 18:09:29,181 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2022-07-12 18:09:29,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 18:09:29,181 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:09:29,181 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:09:29,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-07-12 18:09:29,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-07-12 18:09:29,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:09:29,584 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:09:29,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:09:29,584 INFO L85 PathProgramCache]: Analyzing trace with hash 569105948, now seen corresponding path program 1 times [2022-07-12 18:09:29,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:09:29,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654373751] [2022-07-12 18:09:29,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:09:29,585 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:09:29,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:09:29,586 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:09:29,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-12 18:09:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:09:30,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-12 18:09:30,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:09:30,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:30,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:30,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:30,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:30,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:30,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:30,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 39 [2022-07-12 18:09:30,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:30,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:30,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:30,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:30,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:30,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:30,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:30,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:30,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:30,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:30,536 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:09:30,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 60 [2022-07-12 18:09:31,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:31,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:31,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:31,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:31,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:31,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:31,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-07-12 18:09:32,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:09:32,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:32,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:32,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:32,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:32,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:32,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:32,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:32,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:32,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:32,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:32,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 56 [2022-07-12 18:09:32,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:09:32,914 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-07-12 18:09:32,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 47 [2022-07-12 18:09:34,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-07-12 18:09:34,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:09:36,185 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:09:36,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 113 treesize of output 81 [2022-07-12 18:09:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 18:09:37,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:09:39,803 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:09:39,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 104 treesize of output 75 [2022-07-12 18:09:39,881 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_137 (_ BitVec 32)) (v_arrayElimArr_17 (Array (_ BitVec 32) (_ BitVec 8)))) (or (not (= (let ((.cse0 (select (store |c_#memory_int| v_~head~0.base_137 v_arrayElimArr_17) c_~head~0.base))) (concat (concat (concat (select .cse0 (bvadd c_~head~0.offset (_ bv3 32))) (select .cse0 (bvadd c_~head~0.offset (_ bv2 32)))) (select .cse0 (bvadd c_~head~0.offset (_ bv1 32)))) (select .cse0 c_~head~0.offset))) (_ bv2 32))) (not (= (select v_arrayElimArr_17 (_ bv0 32)) (_ bv3 8))) (not (= (select v_arrayElimArr_17 (_ bv1 32)) (_ bv0 8))) (not (= (_ bv0 8) (select v_arrayElimArr_17 (_ bv3 32)))) (not (= (select v_arrayElimArr_17 (_ bv2 32)) (_ bv0 8))))) is different from false [2022-07-12 18:09:39,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:09:39,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654373751] [2022-07-12 18:09:39,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654373751] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:09:39,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1909279110] [2022-07-12 18:09:39,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:09:39,889 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:09:39,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:09:39,890 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:09:39,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-07-12 18:09:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:09:40,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-12 18:09:40,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:09:40,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:09:41,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:41,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:41,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:41,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:41,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:41,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:41,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 39 [2022-07-12 18:09:41,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:41,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:41,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:41,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:41,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:41,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:41,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:41,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:41,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:41,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:41,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2022-07-12 18:09:43,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:09:44,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:09:44,934 INFO L356 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2022-07-12 18:09:44,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-12 18:09:44,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 67 [2022-07-12 18:09:46,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 58 [2022-07-12 18:09:46,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 41 [2022-07-12 18:09:47,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:47,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:47,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:47,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:47,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:47,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:09:47,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:47,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:09:47,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:47,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:09:47,554 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:09:47,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 60 treesize of output 34 [2022-07-12 18:09:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:09:48,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:09:49,137 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_143 (_ BitVec 32)) (v_ArrVal_2652 (Array (_ BitVec 32) (_ BitVec 8)))) (or (not (= (let ((.cse0 (select (store |c_#memory_int| v_~head~0.base_143 v_ArrVal_2652) c_~head~0.base))) (concat (concat (concat (select .cse0 (bvadd c_~head~0.offset (_ bv3 32))) (select .cse0 (bvadd c_~head~0.offset (_ bv2 32)))) (select .cse0 (bvadd c_~head~0.offset (_ bv1 32)))) (select .cse0 c_~head~0.offset))) (_ bv2 32))) (not (= (bvneg (select |c_#valid| v_~head~0.base_143)) (_ bv0 1))))) is different from false [2022-07-12 18:09:49,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1909279110] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:09:49,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:09:49,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2022-07-12 18:09:49,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093083038] [2022-07-12 18:09:49,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:09:49,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 18:09:49,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:09:49,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 18:09:49,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1375, Unknown=6, NotChecked=150, Total=1640 [2022-07-12 18:09:49,147 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 30 states have internal predecessors, (77), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:10:04,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:10:04,000 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2022-07-12 18:10:04,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:10:04,002 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 30 states have internal predecessors, (77), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 59 [2022-07-12 18:10:04,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:10:04,002 INFO L225 Difference]: With dead ends: 94 [2022-07-12 18:10:04,002 INFO L226 Difference]: Without dead ends: 94 [2022-07-12 18:10:04,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=286, Invalid=2790, Unknown=12, NotChecked=218, Total=3306 [2022-07-12 18:10:04,004 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 99 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:10:04,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 658 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 423 Invalid, 0 Unknown, 243 Unchecked, 2.8s Time] [2022-07-12 18:10:04,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-12 18:10:04,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2022-07-12 18:10:04,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.2647058823529411) internal successors, (86), 79 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:10:04,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2022-07-12 18:10:04,007 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 59 [2022-07-12 18:10:04,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:10:04,008 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2022-07-12 18:10:04,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 30 states have internal predecessors, (77), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:10:04,008 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2022-07-12 18:10:04,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 18:10:04,009 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:10:04,009 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:10:04,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-07-12 18:10:04,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2022-07-12 18:10:04,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 18:10:04,420 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:10:04,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:10:04,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2137373797, now seen corresponding path program 1 times [2022-07-12 18:10:04,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:10:04,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794943942] [2022-07-12 18:10:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:10:04,421 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:10:04,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:10:04,422 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:10:04,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-12 18:10:04,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:10:04,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 18:10:04,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:10:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-12 18:10:04,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:10:04,751 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:10:04,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794943942] [2022-07-12 18:10:04,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794943942] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:10:04,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:10:04,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:10:04,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208528851] [2022-07-12 18:10:04,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:10:04,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:10:04,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:10:04,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:10:04,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:10:04,753 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:10:04,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:10:04,796 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2022-07-12 18:10:04,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:10:04,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2022-07-12 18:10:04,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:10:04,797 INFO L225 Difference]: With dead ends: 84 [2022-07-12 18:10:04,797 INFO L226 Difference]: Without dead ends: 84 [2022-07-12 18:10:04,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:10:04,798 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:10:04,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:10:04,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-12 18:10:04,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-07-12 18:10:04,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 77 states have internal predecessors, (82), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:10:04,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2022-07-12 18:10:04,801 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 59 [2022-07-12 18:10:04,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:10:04,802 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2022-07-12 18:10:04,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:10:04,802 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2022-07-12 18:10:04,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-12 18:10:04,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:10:04,803 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:10:04,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-12 18:10:05,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:10:05,007 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:10:05,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:10:05,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1015974627, now seen corresponding path program 1 times [2022-07-12 18:10:05,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:10:05,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126990989] [2022-07-12 18:10:05,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:10:05,009 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:10:05,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:10:05,010 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:10:05,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-12 18:10:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:10:05,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-12 18:10:05,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:10:05,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:10:05,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:10:06,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:10:06,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:10:07,292 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-07-12 18:10:07,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 30 [2022-07-12 18:10:07,455 INFO L356 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2022-07-12 18:10:07,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 37 [2022-07-12 18:10:09,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:10:09,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:10:09,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:10:09,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2022-07-12 18:10:09,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:10:09,908 INFO L356 Elim1Store]: treesize reduction 4, result has 83.3 percent of original size [2022-07-12 18:10:09,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2022-07-12 18:10:09,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:10:09,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-07-12 18:10:09,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-12 18:10:12,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:10:12,921 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:10:12,921 INFO L390 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 111 treesize of output 50 [2022-07-12 18:10:12,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2022-07-12 18:10:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:10:13,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:10:17,600 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:10:17,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-07-12 18:10:17,666 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:10:17,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2022-07-12 18:10:17,710 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:10:17,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-07-12 18:10:19,887 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_~head~0.base_149 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_~head~0.base_149))))) (forall ((v_arrayElimArr_21 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_22 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= c_~head~0.offset (select v_arrayElimArr_22 (_ bv4 32)))) (not (= (select v_arrayElimArr_21 (_ bv4 32)) c_~head~0.base)) (let ((.cse0 (bvadd c_~head~0.offset (_ bv4 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_149 v_arrayElimArr_22) c_~head~0.base) .cse0) (_ bv8 32)) (select (store |c_#length| v_~head~0.base_149 (_ bv8 32)) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_149 v_arrayElimArr_21) c_~head~0.base) .cse0)))))))) (forall ((v_~head~0.base_149 (_ BitVec 32))) (or (forall ((v_arrayElimArr_20 (Array (_ BitVec 32) (_ BitVec 32)))) (or (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_149 v_arrayElimArr_20) c_~head~0.base) (bvadd c_~head~0.offset (_ bv4 32))))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1))) (not (= c_~head~0.offset (select v_arrayElimArr_20 (_ bv4 32)))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_~head~0.base_149)))))))) is different from false [2022-07-12 18:10:19,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:10:19,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126990989] [2022-07-12 18:10:19,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126990989] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:10:19,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [636432476] [2022-07-12 18:10:19,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:10:19,899 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:10:19,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:10:19,900 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) [2022-07-12 18:10:19,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-07-12 18:10:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:10:20,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-12 18:10:20,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:10:20,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:10:20,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:10:21,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:10:21,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:10:21,838 INFO L356 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2022-07-12 18:10:21,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 37 [2022-07-12 18:10:21,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-12 18:10:23,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:10:23,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:10:25,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:10:25,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-07-12 18:10:25,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:10:25,162 INFO L356 Elim1Store]: treesize reduction 4, result has 77.8 percent of original size [2022-07-12 18:10:25,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-07-12 18:10:25,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:10:25,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-12 18:10:25,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-12 18:10:28,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:10:28,393 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:10:28,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 47 [2022-07-12 18:10:28,447 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:10:28,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-07-12 18:10:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:10:29,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:10:30,880 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:10:30,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-07-12 18:10:30,939 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:10:30,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2022-07-12 18:10:30,969 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:10:30,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-07-12 18:10:37,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [636432476] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:10:37,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:10:37,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2022-07-12 18:10:37,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087804646] [2022-07-12 18:10:37,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:10:37,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 18:10:37,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:10:37,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 18:10:37,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1214, Unknown=22, NotChecked=70, Total=1406 [2022-07-12 18:10:37,464 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 26 states have internal predecessors, (81), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 18:10:48,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:10:48,453 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2022-07-12 18:10:48,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:10:48,454 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 26 states have internal predecessors, (81), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 61 [2022-07-12 18:10:48,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:10:48,454 INFO L225 Difference]: With dead ends: 98 [2022-07-12 18:10:48,454 INFO L226 Difference]: Without dead ends: 98 [2022-07-12 18:10:48,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=183, Invalid=1944, Unknown=39, NotChecked=90, Total=2256 [2022-07-12 18:10:48,455 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 24 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:10:48,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 695 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 247 Invalid, 0 Unknown, 335 Unchecked, 2.7s Time] [2022-07-12 18:10:48,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-12 18:10:48,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2022-07-12 18:10:48,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 80 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:10:48,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2022-07-12 18:10:48,458 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 61 [2022-07-12 18:10:48,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:10:48,459 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2022-07-12 18:10:48,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 26 states have internal predecessors, (81), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 18:10:48,460 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2022-07-12 18:10:48,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-12 18:10:48,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:10:48,460 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:10:48,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-07-12 18:10:48,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-07-12 18:10:48,870 WARN L477 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 [2022-07-12 18:10:48,870 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:10:48,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:10:48,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1021799568, now seen corresponding path program 2 times [2022-07-12 18:10:48,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:10:48,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883912983] [2022-07-12 18:10:48,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:10:48,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:10:48,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:10:48,872 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:10:48,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-12 18:10:49,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:10:49,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:10:49,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-12 18:10:49,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:10:50,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:10:52,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:10:52,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:10:54,107 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-07-12 18:10:54,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 29 [2022-07-12 18:10:55,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:10:56,652 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:10:56,653 INFO L390 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 32 treesize of output 23 [2022-07-12 18:10:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:10:57,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:11:00,801 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:11:00,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-07-12 18:11:01,390 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:11:01,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883912983] [2022-07-12 18:11:01,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883912983] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:11:01,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1835319401] [2022-07-12 18:11:01,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:11:01,391 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:11:01,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:11:01,392 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) [2022-07-12 18:11:01,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-07-12 18:11:01,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:11:01,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:11:02,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-12 18:11:02,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:11:02,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:11:03,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:11:07,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:11:07,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:11:09,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:11:09,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-12 18:11:09,421 INFO L356 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2022-07-12 18:11:09,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-12 18:11:11,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:11:14,071 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 18:11:14,071 INFO L390 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 32 treesize of output 15 [2022-07-12 18:11:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:11:14,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:11:16,311 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:11:16,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-07-12 18:11:16,435 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_31 (Array (_ BitVec 32) (_ BitVec 32))) (v_~head~0.base_167 (_ BitVec 32))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_167 v_arrayElimArr_31) c_~head~0.base) (bvadd c_~head~0.offset (_ bv4 32))) (_ bv0 32))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_~head~0.base_167))))) (not (= (select v_arrayElimArr_31 (_ bv4 32)) c_~head~0.base)))) is different from false [2022-07-12 18:11:16,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1835319401] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:11:16,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:11:16,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 35 [2022-07-12 18:11:16,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000068945] [2022-07-12 18:11:16,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:11:16,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 18:11:16,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:11:16,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 18:11:16,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1436, Unknown=6, NotChecked=76, Total=1640 [2022-07-12 18:11:16,453 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 30 states have internal predecessors, (82), 4 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 18:11:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:11:30,405 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2022-07-12 18:11:30,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 18:11:30,406 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 30 states have internal predecessors, (82), 4 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 61 [2022-07-12 18:11:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:11:30,406 INFO L225 Difference]: With dead ends: 96 [2022-07-12 18:11:30,407 INFO L226 Difference]: Without dead ends: 96 [2022-07-12 18:11:30,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=289, Invalid=2887, Unknown=20, NotChecked=110, Total=3306 [2022-07-12 18:11:30,408 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 21 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:11:30,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 724 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 223 Invalid, 0 Unknown, 147 Unchecked, 3.6s Time] [2022-07-12 18:11:30,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-12 18:11:30,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2022-07-12 18:11:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 80 states have internal predecessors, (85), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:11:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2022-07-12 18:11:30,411 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 61 [2022-07-12 18:11:30,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:11:30,411 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2022-07-12 18:11:30,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 30 states have internal predecessors, (82), 4 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 18:11:30,412 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2022-07-12 18:11:30,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-12 18:11:30,412 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:11:30,412 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:11:30,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-12 18:11:30,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-07-12 18:11:30,813 WARN L477 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 [2022-07-12 18:11:30,813 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:11:30,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:11:30,814 INFO L85 PathProgramCache]: Analyzing trace with hash -357187888, now seen corresponding path program 3 times [2022-07-12 18:11:30,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:11:30,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647062070] [2022-07-12 18:11:30,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:11:30,814 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:11:30,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:11:30,816 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:11:30,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-12 18:11:32,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 18:11:32,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:11:32,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-12 18:11:32,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:11:32,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:11:33,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:11:35,094 INFO L356 Elim1Store]: treesize reduction 30, result has 31.8 percent of original size [2022-07-12 18:11:35,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2022-07-12 18:11:38,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:11:38,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:11:39,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:11:39,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-12 18:11:40,408 INFO L356 Elim1Store]: treesize reduction 112, result has 29.6 percent of original size [2022-07-12 18:11:40,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 64 [2022-07-12 18:11:44,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:11:44,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:11:46,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:11:46,273 INFO L356 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-07-12 18:11:46,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 66 [2022-07-12 18:11:46,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:11:46,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-07-12 18:11:46,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:11:46,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:11:46,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:11:46,737 INFO L356 Elim1Store]: treesize reduction 129, result has 30.6 percent of original size [2022-07-12 18:11:46,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 114 [2022-07-12 18:11:53,820 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-12 18:11:53,821 INFO L390 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 154 treesize of output 107 [2022-07-12 18:11:57,172 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-07-12 18:11:57,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 50 [2022-07-12 18:12:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 38 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:12:00,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:12:09,413 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:12:09,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 45 [2022-07-12 18:12:09,498 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:12:09,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2022-07-12 18:12:09,665 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_36 (Array (_ BitVec 32) (_ BitVec 32))) (v_~head~0.base_173 (_ BitVec 32)) (v_arrayElimArr_35 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (select (store |c_#valid| v_~head~0.base_173 (_ bv1 1)) (let ((.cse1 (bvadd c_~head~0.offset (_ bv4 32)))) (select (let ((.cse0 (store |c_#memory_$Pointer$.base| v_~head~0.base_173 v_arrayElimArr_35))) (select .cse0 (select (select .cse0 c_~head~0.base) .cse1))) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_173 v_arrayElimArr_36) c_~head~0.base) .cse1))))) (_ bv1 1)) (not (= c_~head~0.offset (select v_arrayElimArr_36 (_ bv4 32)))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_~head~0.base_173))))) (not (= c_~head~0.base (select v_arrayElimArr_35 (_ bv4 32)))))) is different from false [2022-07-12 18:12:09,681 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:12:09,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647062070] [2022-07-12 18:12:09,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647062070] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:12:09,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2060501590] [2022-07-12 18:12:09,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:12:09,682 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:12:09,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:12:09,684 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:12:09,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-07-12 18:12:11,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 18:12:11,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:12:12,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-12 18:12:12,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:12:12,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:12:14,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:12:16,683 INFO L356 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2022-07-12 18:12:16,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 37 [2022-07-12 18:12:18,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:12:21,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:12:21,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:12:25,092 INFO L356 Elim1Store]: treesize reduction 66, result has 42.6 percent of original size [2022-07-12 18:12:25,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 66 [2022-07-12 18:12:25,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-07-12 18:12:32,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:12:32,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:12:34,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:12:34,963 INFO L356 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-07-12 18:12:34,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 61 [2022-07-12 18:12:35,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:12:35,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:12:35,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:12:35,339 INFO L356 Elim1Store]: treesize reduction 57, result has 41.8 percent of original size [2022-07-12 18:12:35,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 89 [2022-07-12 18:12:35,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:12:35,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-12 18:12:35,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:12:35,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-12 18:12:46,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:12:46,245 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:12:46,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 42 [2022-07-12 18:12:52,073 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-07-12 18:12:52,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 66 [2022-07-12 18:12:52,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-07-12 18:12:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 38 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:12:55,741 INFO L328 TraceCheckSpWp]: Computing backward predicates...