./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/diff-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/diff-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5cc33a4b6801f9f06dbbb17ff694aba4439c76c6a2b62ec290c2132cc01ea0fe --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:01:13,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:01:13,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:01:13,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:01:13,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:01:13,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:01:13,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:01:13,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:01:13,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:01:13,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:01:13,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:01:13,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:01:13,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:01:13,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:01:13,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:01:13,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:01:13,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:01:13,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:01:13,255 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:01:13,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:01:13,262 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:01:13,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:01:13,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:01:13,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:01:13,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:01:13,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:01:13,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:01:13,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:01:13,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:01:13,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:01:13,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:01:13,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:01:13,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:01:13,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:01:13,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:01:13,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:01:13,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:01:13,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:01:13,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:01:13,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:01:13,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:01:13,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:01:13,281 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:01:13,304 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:01:13,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:01:13,305 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:01:13,306 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:01:13,306 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:01:13,306 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:01:13,307 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:01:13,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:01:13,307 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:01:13,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:01:13,308 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:01:13,308 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:01:13,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:01:13,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:01:13,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:01:13,309 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:01:13,309 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:01:13,309 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:01:13,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:01:13,311 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:01:13,311 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:01:13,311 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:01:13,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:01:13,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:01:13,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:01:13,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:01:13,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:01:13,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:01:13,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:01:13,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:01:13,313 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cc33a4b6801f9f06dbbb17ff694aba4439c76c6a2b62ec290c2132cc01ea0fe [2022-07-14 06:01:13,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:01:13,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:01:13,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:01:13,569 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:01:13,570 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:01:13,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/diff-alloca-2.i [2022-07-14 06:01:13,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f619498f/b3294ad633964d7fb3bc81f2f3274a8e/FLAG0b8d6dd52 [2022-07-14 06:01:14,046 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:01:14,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/diff-alloca-2.i [2022-07-14 06:01:14,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f619498f/b3294ad633964d7fb3bc81f2f3274a8e/FLAG0b8d6dd52 [2022-07-14 06:01:14,070 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f619498f/b3294ad633964d7fb3bc81f2f3274a8e [2022-07-14 06:01:14,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:01:14,073 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:01:14,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:01:14,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:01:14,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:01:14,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:01:14" (1/1) ... [2022-07-14 06:01:14,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13129589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:14, skipping insertion in model container [2022-07-14 06:01:14,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:01:14" (1/1) ... [2022-07-14 06:01:14,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:01:14,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:01:14,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:01:14,382 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-14 06:01:14,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2b03f5f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:14, skipping insertion in model container [2022-07-14 06:01:14,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:01:14,383 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-14 06:01:14,384 INFO L158 Benchmark]: Toolchain (without parser) took 310.45ms. Allocated memory is still 92.3MB. Free memory was 56.8MB in the beginning and 65.7MB in the end (delta: -8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 06:01:14,384 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 92.3MB. Free memory was 62.7MB in the beginning and 62.7MB in the end (delta: 21.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:01:14,385 INFO L158 Benchmark]: CACSL2BoogieTranslator took 297.19ms. Allocated memory is still 92.3MB. Free memory was 56.6MB in the beginning and 65.7MB in the end (delta: -9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 06:01:14,386 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 92.3MB. Free memory was 62.7MB in the beginning and 62.7MB in the end (delta: 21.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 297.19ms. Allocated memory is still 92.3MB. Free memory was 56.6MB in the beginning and 65.7MB in the end (delta: -9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 545]: 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/array-memsafety/diff-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5cc33a4b6801f9f06dbbb17ff694aba4439c76c6a2b62ec290c2132cc01ea0fe --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:01:15,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:01:15,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:01:16,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:01:16,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:01:16,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:01:16,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:01:16,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:01:16,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:01:16,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:01:16,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:01:16,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:01:16,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:01:16,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:01:16,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:01:16,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:01:16,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:01:16,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:01:16,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:01:16,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:01:16,040 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:01:16,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:01:16,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:01:16,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:01:16,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:01:16,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:01:16,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:01:16,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:01:16,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:01:16,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:01:16,051 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:01:16,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:01:16,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:01:16,053 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:01:16,054 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:01:16,055 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:01:16,055 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:01:16,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:01:16,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:01:16,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:01:16,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:01:16,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:01:16,058 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-14 06:01:16,101 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:01:16,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:01:16,102 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:01:16,102 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:01:16,103 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:01:16,103 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:01:16,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:01:16,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:01:16,104 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:01:16,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:01:16,105 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:01:16,105 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:01:16,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:01:16,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:01:16,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:01:16,106 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:01:16,106 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:01:16,106 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:01:16,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:01:16,106 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:01:16,107 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-14 06:01:16,107 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-14 06:01:16,107 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:01:16,107 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:01:16,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:01:16,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:01:16,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:01:16,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:01:16,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:01:16,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:01:16,108 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-14 06:01:16,109 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-14 06:01:16,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-14 06:01:16,109 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cc33a4b6801f9f06dbbb17ff694aba4439c76c6a2b62ec290c2132cc01ea0fe [2022-07-14 06:01:16,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:01:16,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:01:16,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:01:16,393 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:01:16,394 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:01:16,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/diff-alloca-2.i [2022-07-14 06:01:16,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa3b4e96e/ce3ce06864cb49b8bc3069d931869c93/FLAG000a5e418 [2022-07-14 06:01:16,832 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:01:16,833 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/diff-alloca-2.i [2022-07-14 06:01:16,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa3b4e96e/ce3ce06864cb49b8bc3069d931869c93/FLAG000a5e418 [2022-07-14 06:01:17,237 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa3b4e96e/ce3ce06864cb49b8bc3069d931869c93 [2022-07-14 06:01:17,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:01:17,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:01:17,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:01:17,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:01:17,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:01:17,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:01:17" (1/1) ... [2022-07-14 06:01:17,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d915246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:17, skipping insertion in model container [2022-07-14 06:01:17,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:01:17" (1/1) ... [2022-07-14 06:01:17,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:01:17,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:01:17,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:01:17,495 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-14 06:01:17,499 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:01:17,535 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:01:17,538 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:01:17,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:01:17,599 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:01:17,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:17 WrapperNode [2022-07-14 06:01:17,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:01:17,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:01:17,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:01:17,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:01:17,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:17" (1/1) ... [2022-07-14 06:01:17,625 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:17" (1/1) ... [2022-07-14 06:01:17,642 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2022-07-14 06:01:17,643 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:01:17,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:01:17,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:01:17,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:01:17,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:17" (1/1) ... [2022-07-14 06:01:17,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:17" (1/1) ... [2022-07-14 06:01:17,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:17" (1/1) ... [2022-07-14 06:01:17,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:17" (1/1) ... [2022-07-14 06:01:17,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:17" (1/1) ... [2022-07-14 06:01:17,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:17" (1/1) ... [2022-07-14 06:01:17,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:17" (1/1) ... [2022-07-14 06:01:17,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:01:17,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:01:17,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:01:17,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:01:17,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:17" (1/1) ... [2022-07-14 06:01:17,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:01:17,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:01:17,692 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-14 06:01:17,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-14 06:01:17,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-14 06:01:17,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 06:01:17,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:01:17,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-14 06:01:17,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:01:17,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:01:17,892 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:01:17,893 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:01:18,243 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:01:18,248 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:01:18,249 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-14 06:01:18,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:01:18 BoogieIcfgContainer [2022-07-14 06:01:18,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:01:18,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:01:18,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:01:18,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:01:18,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:01:17" (1/3) ... [2022-07-14 06:01:18,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a4c3be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:01:18, skipping insertion in model container [2022-07-14 06:01:18,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:17" (2/3) ... [2022-07-14 06:01:18,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a4c3be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:01:18, skipping insertion in model container [2022-07-14 06:01:18,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:01:18" (3/3) ... [2022-07-14 06:01:18,257 INFO L111 eAbstractionObserver]: Analyzing ICFG diff-alloca-2.i [2022-07-14 06:01:18,271 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:01:18,273 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-07-14 06:01:18,308 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:01:18,312 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@20e83dce, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2dae75d2 [2022-07-14 06:01:18,314 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-07-14 06:01:18,326 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:18,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:01:18,330 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:18,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:18,331 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:18,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:18,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-14 06:01:18,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:18,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748542077] [2022-07-14 06:01:18,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:18,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:18,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:18,347 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:18,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-14 06:01:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:18,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:01:18,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:18,546 INFO L356 Elim1Store]: treesize reduction 39, result has 29.1 percent of original size [2022-07-14 06:01:18,547 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 3 case distinctions, treesize of input 23 treesize of output 29 [2022-07-14 06:01:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:18,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:18,616 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:18,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748542077] [2022-07-14 06:01:18,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748542077] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:18,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:18,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:01:18,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442872875] [2022-07-14 06:01:18,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:18,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:01:18,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:18,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:01:18,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:01:18,645 INFO L87 Difference]: Start difference. First operand has 42 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:18,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:18,658 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2022-07-14 06:01:18,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:01:18,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-14 06:01:18,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:18,665 INFO L225 Difference]: With dead ends: 49 [2022-07-14 06:01:18,665 INFO L226 Difference]: Without dead ends: 47 [2022-07-14 06:01:18,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:01:18,669 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:18,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 73 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-07-14 06:01:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-14 06:01:18,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2022-07-14 06:01:18,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:18,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2022-07-14 06:01:18,707 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 7 [2022-07-14 06:01:18,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:18,707 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2022-07-14 06:01:18,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:18,707 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2022-07-14 06:01:18,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:01:18,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:18,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:18,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-14 06:01:18,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:18,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:18,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:18,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2022-07-14 06:01:18,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:18,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875399274] [2022-07-14 06:01:18,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:18,912 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:18,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:18,914 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:18,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-14 06:01:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:18,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:01:18,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:19,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:01:19,027 INFO L356 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-07-14 06:01:19,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 20 [2022-07-14 06:01:19,043 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 11 treesize of output 9 [2022-07-14 06:01:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:19,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:19,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:19,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875399274] [2022-07-14 06:01:19,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875399274] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:19,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:19,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:01:19,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380368236] [2022-07-14 06:01:19,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:19,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:01:19,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:19,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:01:19,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:01:19,102 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:19,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:19,322 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2022-07-14 06:01:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:01:19,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-14 06:01:19,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:19,324 INFO L225 Difference]: With dead ends: 83 [2022-07-14 06:01:19,324 INFO L226 Difference]: Without dead ends: 83 [2022-07-14 06:01:19,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:01:19,325 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 47 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:19,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 167 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:01:19,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-14 06:01:19,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 46. [2022-07-14 06:01:19,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.696969696969697) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-07-14 06:01:19,330 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 7 [2022-07-14 06:01:19,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:19,330 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-07-14 06:01:19,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:19,330 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-07-14 06:01:19,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:01:19,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:19,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:19,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:19,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:19,532 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:19,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:19,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-07-14 06:01:19,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:19,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504269502] [2022-07-14 06:01:19,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:19,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:19,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:19,535 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:19,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-14 06:01:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:19,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 06:01:19,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:19,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:01:19,668 INFO L356 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2022-07-14 06:01:19,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 24 [2022-07-14 06:01:19,679 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 11 treesize of output 9 [2022-07-14 06:01:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:19,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:19,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:19,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504269502] [2022-07-14 06:01:19,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504269502] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:19,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:19,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:01:19,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899414661] [2022-07-14 06:01:19,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:19,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:01:19,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:19,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:01:19,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:01:19,752 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:19,780 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2022-07-14 06:01:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:01:19,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-14 06:01:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:19,781 INFO L225 Difference]: With dead ends: 46 [2022-07-14 06:01:19,782 INFO L226 Difference]: Without dead ends: 46 [2022-07-14 06:01:19,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:01:19,783 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:19,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 108 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 18 Unchecked, 0.0s Time] [2022-07-14 06:01:19,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-14 06:01:19,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-07-14 06:01:19,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.6875) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:19,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-07-14 06:01:19,786 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 7 [2022-07-14 06:01:19,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:19,786 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-07-14 06:01:19,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:19,787 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-07-14 06:01:19,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:01:19,787 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:19,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:19,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:19,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:19,995 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:19,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:19,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1241130454, now seen corresponding path program 1 times [2022-07-14 06:01:19,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:19,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066106840] [2022-07-14 06:01:19,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:19,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:19,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:19,997 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:19,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-14 06:01:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:20,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:01:20,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:20,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:20,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:20,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066106840] [2022-07-14 06:01:20,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066106840] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:20,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:20,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:01:20,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887991381] [2022-07-14 06:01:20,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:20,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:01:20,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:20,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:01:20,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:01:20,114 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:20,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:20,157 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-07-14 06:01:20,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:01:20,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-14 06:01:20,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:20,159 INFO L225 Difference]: With dead ends: 47 [2022-07-14 06:01:20,159 INFO L226 Difference]: Without dead ends: 47 [2022-07-14 06:01:20,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:01:20,160 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 48 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:20,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 78 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:01:20,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-14 06:01:20,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2022-07-14 06:01:20,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:20,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-07-14 06:01:20,163 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 9 [2022-07-14 06:01:20,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:20,163 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-07-14 06:01:20,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:20,163 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-07-14 06:01:20,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 06:01:20,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:20,164 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:20,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:20,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:20,372 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:20,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:20,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1906083541, now seen corresponding path program 1 times [2022-07-14 06:01:20,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:20,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284852140] [2022-07-14 06:01:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:20,373 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:20,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:20,377 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:20,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-14 06:01:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:20,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:01:20,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:20,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:20,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:20,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284852140] [2022-07-14 06:01:20,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284852140] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:20,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:01:20,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-14 06:01:20,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742688272] [2022-07-14 06:01:20,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:20,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:01:20,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:20,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:01:20,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:01:20,521 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:20,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:20,587 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2022-07-14 06:01:20,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:01:20,589 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-14 06:01:20,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:20,589 INFO L225 Difference]: With dead ends: 78 [2022-07-14 06:01:20,590 INFO L226 Difference]: Without dead ends: 78 [2022-07-14 06:01:20,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:01:20,590 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 174 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:20,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 200 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:20,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-14 06:01:20,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2022-07-14 06:01:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-07-14 06:01:20,594 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 11 [2022-07-14 06:01:20,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:20,594 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-07-14 06:01:20,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:20,595 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-07-14 06:01:20,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 06:01:20,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:20,595 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:20,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:20,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:20,803 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:20,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:20,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025171, now seen corresponding path program 1 times [2022-07-14 06:01:20,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:20,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771773884] [2022-07-14 06:01:20,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:20,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:20,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:20,805 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:20,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-14 06:01:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:20,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 06:01:20,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:20,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:20,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:20,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771773884] [2022-07-14 06:01:20,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771773884] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:20,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:20,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:01:20,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025929033] [2022-07-14 06:01:20,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:20,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:01:20,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:20,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:01:20,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:01:20,867 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:20,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:20,938 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-07-14 06:01:20,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:01:20,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-14 06:01:20,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:20,939 INFO L225 Difference]: With dead ends: 48 [2022-07-14 06:01:20,939 INFO L226 Difference]: Without dead ends: 48 [2022-07-14 06:01:20,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:01:20,940 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:20,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 36 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:20,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-14 06:01:20,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-14 06:01:20,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-07-14 06:01:20,943 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 11 [2022-07-14 06:01:20,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:20,943 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-07-14 06:01:20,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:20,943 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-07-14 06:01:20,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 06:01:20,943 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:20,943 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:20,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:21,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:21,150 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:21,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:21,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-07-14 06:01:21,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:21,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034962722] [2022-07-14 06:01:21,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:21,151 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:21,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:21,152 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:21,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-14 06:01:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:21,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 06:01:21,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:21,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:01:21,291 INFO L356 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2022-07-14 06:01:21,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 24 [2022-07-14 06:01:21,302 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 11 treesize of output 9 [2022-07-14 06:01:21,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:21,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:21,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:01:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:21,985 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:21,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034962722] [2022-07-14 06:01:21,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034962722] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:21,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:01:21,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-14 06:01:21,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811243991] [2022-07-14 06:01:21,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:21,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:01:21,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:21,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:01:21,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:01:21,986 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:22,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:22,515 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2022-07-14 06:01:22,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:01:22,516 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-14 06:01:22,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:22,517 INFO L225 Difference]: With dead ends: 85 [2022-07-14 06:01:22,517 INFO L226 Difference]: Without dead ends: 85 [2022-07-14 06:01:22,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:01:22,517 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 230 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:22,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 186 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 21 Unchecked, 0.5s Time] [2022-07-14 06:01:22,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-14 06:01:22,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 56. [2022-07-14 06:01:22,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.5) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:22,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-07-14 06:01:22,520 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 11 [2022-07-14 06:01:22,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:22,521 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-07-14 06:01:22,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:22,521 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-07-14 06:01:22,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:01:22,521 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:22,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:22,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:22,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:22,730 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:22,731 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265385, now seen corresponding path program 1 times [2022-07-14 06:01:22,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:22,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386876265] [2022-07-14 06:01:22,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:22,731 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:22,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:22,733 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:22,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-14 06:01:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:22,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 06:01:22,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:22,814 INFO L356 Elim1Store]: treesize reduction 39, result has 29.1 percent of original size [2022-07-14 06:01:22,815 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 2 case distinctions, treesize of input 27 treesize of output 33 [2022-07-14 06:01:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:22,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:22,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:22,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386876265] [2022-07-14 06:01:22,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386876265] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:22,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:22,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:01:22,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79944139] [2022-07-14 06:01:22,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:22,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:01:22,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:22,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:01:22,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:01:22,837 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:22,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:22,890 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-07-14 06:01:22,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:01:22,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-14 06:01:22,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:22,893 INFO L225 Difference]: With dead ends: 55 [2022-07-14 06:01:22,893 INFO L226 Difference]: Without dead ends: 55 [2022-07-14 06:01:22,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:01:22,894 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:22,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:22,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-14 06:01:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-07-14 06:01:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:22,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-07-14 06:01:22,903 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 13 [2022-07-14 06:01:22,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:22,903 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-07-14 06:01:22,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:22,903 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-07-14 06:01:22,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:01:22,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:22,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:22,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:23,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:23,115 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:23,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:23,115 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265384, now seen corresponding path program 1 times [2022-07-14 06:01:23,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:23,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668283813] [2022-07-14 06:01:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:23,116 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:23,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:23,117 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:23,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-14 06:01:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:23,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:01:23,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:23,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:01:23,203 INFO L356 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-07-14 06:01:23,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-07-14 06:01:23,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-07-14 06:01:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:23,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:23,279 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:23,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668283813] [2022-07-14 06:01:23,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668283813] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:23,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:23,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:01:23,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496254847] [2022-07-14 06:01:23,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:23,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:01:23,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:23,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:01:23,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:01:23,280 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:23,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:23,439 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2022-07-14 06:01:23,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:01:23,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-14 06:01:23,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:23,440 INFO L225 Difference]: With dead ends: 109 [2022-07-14 06:01:23,440 INFO L226 Difference]: Without dead ends: 109 [2022-07-14 06:01:23,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:01:23,441 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 80 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:23,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 144 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:23,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-14 06:01:23,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 79. [2022-07-14 06:01:23,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.3676470588235294) internal successors, (93), 78 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2022-07-14 06:01:23,444 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 13 [2022-07-14 06:01:23,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:23,444 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2022-07-14 06:01:23,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:23,444 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2022-07-14 06:01:23,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:01:23,445 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:23,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:23,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:23,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:23,654 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:23,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:23,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1811674902, now seen corresponding path program 1 times [2022-07-14 06:01:23,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:23,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803479678] [2022-07-14 06:01:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:23,655 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:23,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:23,656 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:23,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-14 06:01:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:23,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 06:01:23,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:23,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:01:23,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:01:23,760 INFO L356 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-07-14 06:01:23,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2022-07-14 06:01:23,784 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 15 treesize of output 13 [2022-07-14 06:01:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:23,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:23,908 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:23,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803479678] [2022-07-14 06:01:23,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803479678] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:23,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:23,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:01:23,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883630485] [2022-07-14 06:01:23,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:23,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:01:23,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:23,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:01:23,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:01:23,910 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:23,933 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2022-07-14 06:01:23,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:01:23,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-14 06:01:23,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:23,935 INFO L225 Difference]: With dead ends: 81 [2022-07-14 06:01:23,935 INFO L226 Difference]: Without dead ends: 81 [2022-07-14 06:01:23,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:01:23,935 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:23,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 29 Unchecked, 0.0s Time] [2022-07-14 06:01:23,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-14 06:01:23,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-07-14 06:01:23,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 79 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:23,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2022-07-14 06:01:23,939 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 13 [2022-07-14 06:01:23,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:23,939 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2022-07-14 06:01:23,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:23,939 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2022-07-14 06:01:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 06:01:23,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:23,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:23,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:24,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:24,147 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:24,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:24,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1046384445, now seen corresponding path program 1 times [2022-07-14 06:01:24,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:24,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067053296] [2022-07-14 06:01:24,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:24,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:24,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:24,149 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:24,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-14 06:01:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:24,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:01:24,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:24,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:24,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:24,239 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:24,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067053296] [2022-07-14 06:01:24,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2067053296] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:24,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:24,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:01:24,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006620965] [2022-07-14 06:01:24,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:24,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:01:24,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:24,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:01:24,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:01:24,241 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:24,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:24,326 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2022-07-14 06:01:24,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:01:24,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-14 06:01:24,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:24,327 INFO L225 Difference]: With dead ends: 130 [2022-07-14 06:01:24,327 INFO L226 Difference]: Without dead ends: 130 [2022-07-14 06:01:24,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:01:24,328 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 71 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:24,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 127 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:24,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-14 06:01:24,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 91. [2022-07-14 06:01:24,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 80 states have (on average 1.3625) internal successors, (109), 90 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:24,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2022-07-14 06:01:24,331 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 16 [2022-07-14 06:01:24,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:24,331 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2022-07-14 06:01:24,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:24,331 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2022-07-14 06:01:24,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 06:01:24,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:24,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:24,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:24,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:24,536 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:24,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:24,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1046385311, now seen corresponding path program 1 times [2022-07-14 06:01:24,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:24,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953816677] [2022-07-14 06:01:24,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:24,537 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:24,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:24,538 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:24,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-14 06:01:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:24,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:01:24,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:24,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:24,626 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:24,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953816677] [2022-07-14 06:01:24,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953816677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:24,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:24,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:01:24,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990376585] [2022-07-14 06:01:24,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:24,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:01:24,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:24,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:01:24,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:01:24,627 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:24,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:24,695 INFO L93 Difference]: Finished difference Result 89 states and 107 transitions. [2022-07-14 06:01:24,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:01:24,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-14 06:01:24,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:24,697 INFO L225 Difference]: With dead ends: 89 [2022-07-14 06:01:24,697 INFO L226 Difference]: Without dead ends: 89 [2022-07-14 06:01:24,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:01:24,698 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 46 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:24,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 48 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:24,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-14 06:01:24,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-07-14 06:01:24,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 80 states have (on average 1.3375) internal successors, (107), 88 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:24,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2022-07-14 06:01:24,701 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 16 [2022-07-14 06:01:24,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:24,701 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2022-07-14 06:01:24,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:24,701 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2022-07-14 06:01:24,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 06:01:24,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:24,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:24,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:24,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:24,909 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:24,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:24,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1046385312, now seen corresponding path program 1 times [2022-07-14 06:01:24,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:24,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706133943] [2022-07-14 06:01:24,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:24,910 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:24,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:24,911 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:24,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-14 06:01:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:25,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:01:25,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:25,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:25,265 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 25 treesize of output 21 [2022-07-14 06:01:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:25,327 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:25,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706133943] [2022-07-14 06:01:25,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706133943] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:25,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:01:25,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-07-14 06:01:25,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830125869] [2022-07-14 06:01:25,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:25,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:01:25,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:25,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:01:25,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:01:25,329 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:25,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:25,966 INFO L93 Difference]: Finished difference Result 163 states and 196 transitions. [2022-07-14 06:01:25,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:01:25,967 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-14 06:01:25,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:25,968 INFO L225 Difference]: With dead ends: 163 [2022-07-14 06:01:25,968 INFO L226 Difference]: Without dead ends: 163 [2022-07-14 06:01:25,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:01:25,968 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 211 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:25,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 122 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:01:25,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-07-14 06:01:25,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 94. [2022-07-14 06:01:25,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 85 states have (on average 1.3529411764705883) internal successors, (115), 93 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:25,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2022-07-14 06:01:25,971 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 16 [2022-07-14 06:01:25,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:25,972 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2022-07-14 06:01:25,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:25,972 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2022-07-14 06:01:25,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 06:01:25,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:25,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:25,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:26,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:26,182 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:26,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:26,183 INFO L85 PathProgramCache]: Analyzing trace with hash 35267195, now seen corresponding path program 1 times [2022-07-14 06:01:26,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:26,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711386353] [2022-07-14 06:01:26,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:26,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:26,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:26,185 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:26,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-14 06:01:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:26,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:01:26,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:26,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:26,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:26,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711386353] [2022-07-14 06:01:26,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711386353] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:26,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:01:26,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-07-14 06:01:26,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186419616] [2022-07-14 06:01:26,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:26,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:01:26,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:26,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:01:26,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:01:26,383 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:26,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:26,596 INFO L93 Difference]: Finished difference Result 142 states and 172 transitions. [2022-07-14 06:01:26,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 06:01:26,597 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-14 06:01:26,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:26,597 INFO L225 Difference]: With dead ends: 142 [2022-07-14 06:01:26,597 INFO L226 Difference]: Without dead ends: 142 [2022-07-14 06:01:26,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:01:26,598 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 296 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:26,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 164 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:26,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-14 06:01:26,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 83. [2022-07-14 06:01:26,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.3513513513513513) internal successors, (100), 82 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:26,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2022-07-14 06:01:26,607 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 16 [2022-07-14 06:01:26,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:26,607 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2022-07-14 06:01:26,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:26,607 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2022-07-14 06:01:26,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-14 06:01:26,609 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:26,609 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:26,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:26,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:26,812 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:26,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:26,812 INFO L85 PathProgramCache]: Analyzing trace with hash -862198757, now seen corresponding path program 1 times [2022-07-14 06:01:26,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:26,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276991698] [2022-07-14 06:01:26,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:26,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:26,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:26,814 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:26,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-14 06:01:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:26,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:01:26,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:26,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:26,956 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:26,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276991698] [2022-07-14 06:01:26,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276991698] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:26,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:01:26,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-14 06:01:26,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873839869] [2022-07-14 06:01:26,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:26,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:01:26,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:26,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:01:26,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:01:26,958 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:27,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:27,012 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2022-07-14 06:01:27,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:01:27,013 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-14 06:01:27,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:27,014 INFO L225 Difference]: With dead ends: 113 [2022-07-14 06:01:27,014 INFO L226 Difference]: Without dead ends: 113 [2022-07-14 06:01:27,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:01:27,014 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 100 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:27,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 197 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:27,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-14 06:01:27,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2022-07-14 06:01:27,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 86 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:27,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 104 transitions. [2022-07-14 06:01:27,019 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 104 transitions. Word has length 17 [2022-07-14 06:01:27,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:27,019 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 104 transitions. [2022-07-14 06:01:27,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:27,019 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 104 transitions. [2022-07-14 06:01:27,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-14 06:01:27,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:27,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:27,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-14 06:01:27,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:27,228 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:27,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:27,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1921793684, now seen corresponding path program 1 times [2022-07-14 06:01:27,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:27,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890506692] [2022-07-14 06:01:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:27,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:27,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:27,230 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:27,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-14 06:01:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:27,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:01:27,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:27,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:27,330 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:27,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890506692] [2022-07-14 06:01:27,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890506692] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:27,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:27,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:01:27,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888348147] [2022-07-14 06:01:27,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:27,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:01:27,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:27,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:01:27,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:01:27,333 INFO L87 Difference]: Start difference. First operand 87 states and 104 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:27,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:27,364 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2022-07-14 06:01:27,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:01:27,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-14 06:01:27,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:27,365 INFO L225 Difference]: With dead ends: 89 [2022-07-14 06:01:27,365 INFO L226 Difference]: Without dead ends: 89 [2022-07-14 06:01:27,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:01:27,366 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:27,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 72 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:01:27,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-14 06:01:27,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2022-07-14 06:01:27,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 78 states have (on average 1.3205128205128205) internal successors, (103), 86 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:27,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2022-07-14 06:01:27,367 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 17 [2022-07-14 06:01:27,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:27,367 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2022-07-14 06:01:27,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:27,368 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2022-07-14 06:01:27,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-14 06:01:27,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:27,368 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:27,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:27,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:27,575 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:27,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:27,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1873316007, now seen corresponding path program 1 times [2022-07-14 06:01:27,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:27,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [984124114] [2022-07-14 06:01:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:27,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:27,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:27,577 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:27,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-14 06:01:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:27,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 06:01:27,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:27,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:01:27,723 INFO L356 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2022-07-14 06:01:27,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 25 [2022-07-14 06:01:27,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-07-14 06:01:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:27,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:28,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:01:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:28,372 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:28,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [984124114] [2022-07-14 06:01:28,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [984124114] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:28,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:01:28,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-07-14 06:01:28,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490592930] [2022-07-14 06:01:28,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:28,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:01:28,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:28,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:01:28,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:01:28,373 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:28,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:28,888 INFO L93 Difference]: Finished difference Result 120 states and 143 transitions. [2022-07-14 06:01:28,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 06:01:28,889 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-14 06:01:28,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:28,890 INFO L225 Difference]: With dead ends: 120 [2022-07-14 06:01:28,890 INFO L226 Difference]: Without dead ends: 120 [2022-07-14 06:01:28,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:01:28,890 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 179 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:28,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 160 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 121 Invalid, 0 Unknown, 15 Unchecked, 0.4s Time] [2022-07-14 06:01:28,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-14 06:01:28,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 95. [2022-07-14 06:01:28,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 86 states have (on average 1.313953488372093) internal successors, (113), 94 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:28,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2022-07-14 06:01:28,892 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 17 [2022-07-14 06:01:28,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:28,892 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2022-07-14 06:01:28,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2022-07-14 06:01:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-14 06:01:28,893 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:28,893 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:28,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:29,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:29,105 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:29,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:29,105 INFO L85 PathProgramCache]: Analyzing trace with hash -472171212, now seen corresponding path program 2 times [2022-07-14 06:01:29,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:29,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [492239024] [2022-07-14 06:01:29,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:01:29,105 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:29,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:29,106 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:29,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-14 06:01:29,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:01:29,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:01:29,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-14 06:01:29,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:29,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:01:29,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:01:29,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:01:29,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-07-14 06:01:29,256 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:01:29,257 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 25 treesize of output 21 [2022-07-14 06:01:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:29,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:30,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:01:30,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:01:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:30,241 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:30,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [492239024] [2022-07-14 06:01:30,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [492239024] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:30,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:01:30,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-07-14 06:01:30,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826056518] [2022-07-14 06:01:30,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:30,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 06:01:30,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:30,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 06:01:30,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:01:30,242 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:31,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:31,744 INFO L93 Difference]: Finished difference Result 127 states and 153 transitions. [2022-07-14 06:01:31,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-14 06:01:31,745 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-14 06:01:31,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:31,746 INFO L225 Difference]: With dead ends: 127 [2022-07-14 06:01:31,746 INFO L226 Difference]: Without dead ends: 127 [2022-07-14 06:01:31,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:01:31,746 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:31,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 274 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 48 Unchecked, 0.4s Time] [2022-07-14 06:01:31,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-14 06:01:31,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-07-14 06:01:31,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 118 states have (on average 1.2966101694915255) internal successors, (153), 126 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:31,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2022-07-14 06:01:31,748 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 19 [2022-07-14 06:01:31,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:31,748 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2022-07-14 06:01:31,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:31,749 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2022-07-14 06:01:31,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-14 06:01:31,751 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:31,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:31,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:31,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:31,951 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:31,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1835293711, now seen corresponding path program 1 times [2022-07-14 06:01:31,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:31,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084132752] [2022-07-14 06:01:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:31,952 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:31,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:31,953 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:31,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-14 06:01:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:32,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:01:32,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:32,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:32,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:32,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084132752] [2022-07-14 06:01:32,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084132752] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:32,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:32,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:01:32,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865457284] [2022-07-14 06:01:32,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:32,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:01:32,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:32,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:01:32,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:01:32,037 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:32,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:32,090 INFO L93 Difference]: Finished difference Result 126 states and 152 transitions. [2022-07-14 06:01:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:01:32,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-14 06:01:32,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:32,092 INFO L225 Difference]: With dead ends: 126 [2022-07-14 06:01:32,092 INFO L226 Difference]: Without dead ends: 126 [2022-07-14 06:01:32,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:01:32,092 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:32,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 49 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:01:32,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-14 06:01:32,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-07-14 06:01:32,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 118 states have (on average 1.2881355932203389) internal successors, (152), 125 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:32,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 152 transitions. [2022-07-14 06:01:32,095 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 152 transitions. Word has length 21 [2022-07-14 06:01:32,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:32,095 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 152 transitions. [2022-07-14 06:01:32,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:32,095 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 152 transitions. [2022-07-14 06:01:32,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-14 06:01:32,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:32,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:32,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-07-14 06:01:32,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:32,302 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:32,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:32,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1835293710, now seen corresponding path program 1 times [2022-07-14 06:01:32,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:32,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732983914] [2022-07-14 06:01:32,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:32,303 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:32,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:32,304 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:32,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-14 06:01:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:32,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:01:32,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:32,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:32,638 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 25 treesize of output 21 [2022-07-14 06:01:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:32,729 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:32,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732983914] [2022-07-14 06:01:32,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732983914] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:32,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:01:32,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-07-14 06:01:32,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73816416] [2022-07-14 06:01:32,730 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:32,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:01:32,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:32,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:01:32,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:01:32,731 INFO L87 Difference]: Start difference. First operand 126 states and 152 transitions. Second operand has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:33,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:33,433 INFO L93 Difference]: Finished difference Result 208 states and 249 transitions. [2022-07-14 06:01:33,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:01:33,433 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-14 06:01:33,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:33,434 INFO L225 Difference]: With dead ends: 208 [2022-07-14 06:01:33,434 INFO L226 Difference]: Without dead ends: 208 [2022-07-14 06:01:33,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2022-07-14 06:01:33,436 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 375 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:33,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 129 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:01:33,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-14 06:01:33,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 129. [2022-07-14 06:01:33,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 121 states have (on average 1.2892561983471074) internal successors, (156), 128 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:33,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2022-07-14 06:01:33,438 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 21 [2022-07-14 06:01:33,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:33,438 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2022-07-14 06:01:33,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:33,439 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2022-07-14 06:01:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:01:33,439 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:33,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:33,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-07-14 06:01:33,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:33,646 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:33,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:33,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1059572912, now seen corresponding path program 1 times [2022-07-14 06:01:33,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:33,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1479879099] [2022-07-14 06:01:33,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:33,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:33,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:33,648 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:33,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-14 06:01:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:33,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:01:33,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:01:33,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:33,768 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:33,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1479879099] [2022-07-14 06:01:33,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1479879099] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:33,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:33,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:01:33,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407383542] [2022-07-14 06:01:33,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:33,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:01:33,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:33,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:01:33,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:01:33,769 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:33,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:33,827 INFO L93 Difference]: Finished difference Result 158 states and 189 transitions. [2022-07-14 06:01:33,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:01:33,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-14 06:01:33,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:33,828 INFO L225 Difference]: With dead ends: 158 [2022-07-14 06:01:33,828 INFO L226 Difference]: Without dead ends: 158 [2022-07-14 06:01:33,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:01:33,828 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 54 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:33,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 128 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:01:33,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-14 06:01:33,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 147. [2022-07-14 06:01:33,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 139 states have (on average 1.316546762589928) internal successors, (183), 146 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:33,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 183 transitions. [2022-07-14 06:01:33,831 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 183 transitions. Word has length 22 [2022-07-14 06:01:33,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:33,831 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 183 transitions. [2022-07-14 06:01:33,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:33,831 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 183 transitions. [2022-07-14 06:01:33,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:01:33,831 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:33,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:33,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:34,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:34,035 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:34,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:34,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1546450642, now seen corresponding path program 1 times [2022-07-14 06:01:34,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:34,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642557974] [2022-07-14 06:01:34,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:34,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:34,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:34,037 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:34,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-14 06:01:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:34,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:01:34,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:34,132 INFO L356 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2022-07-14 06:01:34,132 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-07-14 06:01:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:01:34,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:34,165 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:34,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642557974] [2022-07-14 06:01:34,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642557974] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:34,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:34,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:01:34,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977143262] [2022-07-14 06:01:34,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:34,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:01:34,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:34,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:01:34,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:01:34,166 INFO L87 Difference]: Start difference. First operand 147 states and 183 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:34,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:34,222 INFO L93 Difference]: Finished difference Result 146 states and 181 transitions. [2022-07-14 06:01:34,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:01:34,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-14 06:01:34,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:34,223 INFO L225 Difference]: With dead ends: 146 [2022-07-14 06:01:34,223 INFO L226 Difference]: Without dead ends: 146 [2022-07-14 06:01:34,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:01:34,223 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 35 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:34,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 51 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:01:34,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-14 06:01:34,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-07-14 06:01:34,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 139 states have (on average 1.3021582733812949) internal successors, (181), 145 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:34,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 181 transitions. [2022-07-14 06:01:34,226 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 181 transitions. Word has length 22 [2022-07-14 06:01:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:34,226 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 181 transitions. [2022-07-14 06:01:34,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:34,226 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 181 transitions. [2022-07-14 06:01:34,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:01:34,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:34,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:34,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:34,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:34,434 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:34,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:34,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1546450643, now seen corresponding path program 1 times [2022-07-14 06:01:34,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:34,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394053022] [2022-07-14 06:01:34,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:34,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:34,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:34,435 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:34,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-14 06:01:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:34,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:01:34,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:34,545 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-07-14 06:01:34,545 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-07-14 06:01:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:01:34,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:34,612 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:34,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394053022] [2022-07-14 06:01:34,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394053022] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:34,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:34,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:01:34,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259619952] [2022-07-14 06:01:34,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:34,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:01:34,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:34,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:01:34,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:01:34,613 INFO L87 Difference]: Start difference. First operand 146 states and 181 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:34,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:34,783 INFO L93 Difference]: Finished difference Result 250 states and 315 transitions. [2022-07-14 06:01:34,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:01:34,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-14 06:01:34,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:34,784 INFO L225 Difference]: With dead ends: 250 [2022-07-14 06:01:34,784 INFO L226 Difference]: Without dead ends: 250 [2022-07-14 06:01:34,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:01:34,785 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 107 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:34,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 121 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:34,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-14 06:01:34,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 202. [2022-07-14 06:01:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 195 states have (on average 1.323076923076923) internal successors, (258), 201 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 258 transitions. [2022-07-14 06:01:34,789 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 258 transitions. Word has length 22 [2022-07-14 06:01:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:34,789 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 258 transitions. [2022-07-14 06:01:34,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 258 transitions. [2022-07-14 06:01:34,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:01:34,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:34,789 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:34,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:34,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:34,994 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:34,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:34,994 INFO L85 PathProgramCache]: Analyzing trace with hash 728802193, now seen corresponding path program 1 times [2022-07-14 06:01:34,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:34,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942063636] [2022-07-14 06:01:34,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:34,997 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:34,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:35,003 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:35,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-14 06:01:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:35,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 06:01:35,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:35,175 INFO L356 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-07-14 06:01:35,175 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-07-14 06:01:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:01:35,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:35,365 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:35,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942063636] [2022-07-14 06:01:35,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942063636] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:35,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:35,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:01:35,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818904541] [2022-07-14 06:01:35,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:35,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:01:35,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:35,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:01:35,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:01:35,366 INFO L87 Difference]: Start difference. First operand 202 states and 258 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:35,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:35,387 INFO L93 Difference]: Finished difference Result 229 states and 298 transitions. [2022-07-14 06:01:35,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:01:35,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-14 06:01:35,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:35,388 INFO L225 Difference]: With dead ends: 229 [2022-07-14 06:01:35,388 INFO L226 Difference]: Without dead ends: 229 [2022-07-14 06:01:35,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:01:35,388 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:35,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 94 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2022-07-14 06:01:35,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-07-14 06:01:35,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 208. [2022-07-14 06:01:35,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 201 states have (on average 1.3383084577114428) internal successors, (269), 207 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 269 transitions. [2022-07-14 06:01:35,391 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 269 transitions. Word has length 22 [2022-07-14 06:01:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:35,391 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 269 transitions. [2022-07-14 06:01:35,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:35,391 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 269 transitions. [2022-07-14 06:01:35,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-14 06:01:35,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:35,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:35,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:35,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:35,595 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:35,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:35,596 INFO L85 PathProgramCache]: Analyzing trace with hash 88962737, now seen corresponding path program 1 times [2022-07-14 06:01:35,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:35,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985004555] [2022-07-14 06:01:35,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:35,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:35,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:35,597 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:35,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-14 06:01:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:35,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 06:01:35,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:01:35,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:35,679 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:35,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985004555] [2022-07-14 06:01:35,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985004555] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:35,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:35,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:01:35,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77881939] [2022-07-14 06:01:35,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:35,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:01:35,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:35,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:01:35,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:01:35,680 INFO L87 Difference]: Start difference. First operand 208 states and 269 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:35,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:35,694 INFO L93 Difference]: Finished difference Result 216 states and 273 transitions. [2022-07-14 06:01:35,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:01:35,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-14 06:01:35,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:35,695 INFO L225 Difference]: With dead ends: 216 [2022-07-14 06:01:35,695 INFO L226 Difference]: Without dead ends: 216 [2022-07-14 06:01:35,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:01:35,698 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:35,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 63 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:01:35,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-14 06:01:35,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 208. [2022-07-14 06:01:35,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 201 states have (on average 1.3134328358208955) internal successors, (264), 207 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:35,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 264 transitions. [2022-07-14 06:01:35,702 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 264 transitions. Word has length 24 [2022-07-14 06:01:35,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:35,702 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 264 transitions. [2022-07-14 06:01:35,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:35,703 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 264 transitions. [2022-07-14 06:01:35,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:01:35,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:35,703 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:35,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:35,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:35,904 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:35,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash -747793046, now seen corresponding path program 1 times [2022-07-14 06:01:35,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:35,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996880986] [2022-07-14 06:01:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:35,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:35,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:35,905 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:35,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-14 06:01:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:35,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:01:35,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:36,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:01:36,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:01:36,098 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:36,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996880986] [2022-07-14 06:01:36,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996880986] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:36,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:01:36,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-14 06:01:36,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843417600] [2022-07-14 06:01:36,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:36,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:01:36,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:36,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:01:36,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:01:36,099 INFO L87 Difference]: Start difference. First operand 208 states and 264 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:36,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:36,172 INFO L93 Difference]: Finished difference Result 221 states and 269 transitions. [2022-07-14 06:01:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:01:36,173 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-14 06:01:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:36,173 INFO L225 Difference]: With dead ends: 221 [2022-07-14 06:01:36,173 INFO L226 Difference]: Without dead ends: 221 [2022-07-14 06:01:36,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:01:36,174 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 106 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:36,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 250 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:36,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-14 06:01:36,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 204. [2022-07-14 06:01:36,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 197 states have (on average 1.299492385786802) internal successors, (256), 203 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:36,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 256 transitions. [2022-07-14 06:01:36,177 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 256 transitions. Word has length 25 [2022-07-14 06:01:36,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:36,177 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 256 transitions. [2022-07-14 06:01:36,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:36,178 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 256 transitions. [2022-07-14 06:01:36,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:01:36,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:36,178 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:36,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:36,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:36,379 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:36,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:36,380 INFO L85 PathProgramCache]: Analyzing trace with hash -528938328, now seen corresponding path program 1 times [2022-07-14 06:01:36,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:36,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370033259] [2022-07-14 06:01:36,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:36,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:36,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:36,381 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:36,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-14 06:01:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:36,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 06:01:36,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:36,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:36,733 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:36,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370033259] [2022-07-14 06:01:36,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370033259] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:36,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:01:36,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2022-07-14 06:01:36,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474912755] [2022-07-14 06:01:36,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:36,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-14 06:01:36,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:36,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-14 06:01:36,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-14 06:01:36,735 INFO L87 Difference]: Start difference. First operand 204 states and 256 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:37,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:37,005 INFO L93 Difference]: Finished difference Result 267 states and 333 transitions. [2022-07-14 06:01:37,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:01:37,006 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-14 06:01:37,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:37,007 INFO L225 Difference]: With dead ends: 267 [2022-07-14 06:01:37,007 INFO L226 Difference]: Without dead ends: 267 [2022-07-14 06:01:37,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:01:37,008 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 175 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:37,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 330 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:01:37,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-07-14 06:01:37,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 241. [2022-07-14 06:01:37,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 234 states have (on average 1.3247863247863247) internal successors, (310), 240 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:37,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 310 transitions. [2022-07-14 06:01:37,012 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 310 transitions. Word has length 25 [2022-07-14 06:01:37,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:37,012 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 310 transitions. [2022-07-14 06:01:37,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:37,012 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 310 transitions. [2022-07-14 06:01:37,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:01:37,013 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:37,013 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:37,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:37,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:37,220 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:37,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:37,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1117279393, now seen corresponding path program 2 times [2022-07-14 06:01:37,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:37,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796633088] [2022-07-14 06:01:37,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:01:37,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:37,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:37,223 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:37,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-14 06:01:37,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:01:37,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:01:37,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 06:01:37,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:37,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:01:37,361 INFO L356 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2022-07-14 06:01:37,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 25 [2022-07-14 06:01:37,378 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 45 treesize of output 41 [2022-07-14 06:01:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:37,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:38,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:01:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:38,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:38,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796633088] [2022-07-14 06:01:38,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796633088] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:38,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:01:38,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-14 06:01:38,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547215480] [2022-07-14 06:01:38,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:38,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-14 06:01:38,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:38,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-14 06:01:38,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:01:38,812 INFO L87 Difference]: Start difference. First operand 241 states and 310 transitions. Second operand has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:42,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:42,087 INFO L93 Difference]: Finished difference Result 471 states and 608 transitions. [2022-07-14 06:01:42,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-14 06:01:42,089 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-14 06:01:42,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:42,091 INFO L225 Difference]: With dead ends: 471 [2022-07-14 06:01:42,091 INFO L226 Difference]: Without dead ends: 471 [2022-07-14 06:01:42,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2022-07-14 06:01:42,092 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 374 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:42,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 396 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 340 Invalid, 0 Unknown, 47 Unchecked, 2.1s Time] [2022-07-14 06:01:42,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-07-14 06:01:42,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 273. [2022-07-14 06:01:42,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 266 states have (on average 1.3157894736842106) internal successors, (350), 272 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:42,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 350 transitions. [2022-07-14 06:01:42,099 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 350 transitions. Word has length 25 [2022-07-14 06:01:42,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:42,099 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 350 transitions. [2022-07-14 06:01:42,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:42,100 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 350 transitions. [2022-07-14 06:01:42,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:01:42,106 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:42,106 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:42,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:42,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:42,315 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:42,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:42,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1840804201, now seen corresponding path program 1 times [2022-07-14 06:01:42,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:42,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701060712] [2022-07-14 06:01:42,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:42,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:42,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:42,317 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:42,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-14 06:01:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:42,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 06:01:42,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:42,458 INFO L356 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-07-14 06:01:42,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-07-14 06:01:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 06:01:42,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:42,670 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:42,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701060712] [2022-07-14 06:01:42,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701060712] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:42,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:42,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:01:42,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798340934] [2022-07-14 06:01:42,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:42,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:01:42,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:42,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:01:42,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:01:42,671 INFO L87 Difference]: Start difference. First operand 273 states and 350 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:42,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:42,691 INFO L93 Difference]: Finished difference Result 323 states and 418 transitions. [2022-07-14 06:01:42,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:01:42,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-14 06:01:42,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:42,692 INFO L225 Difference]: With dead ends: 323 [2022-07-14 06:01:42,693 INFO L226 Difference]: Without dead ends: 323 [2022-07-14 06:01:42,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:01:42,693 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:42,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 106 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2022-07-14 06:01:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-07-14 06:01:42,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 227. [2022-07-14 06:01:42,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 220 states have (on average 1.3363636363636364) internal successors, (294), 226 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:42,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 294 transitions. [2022-07-14 06:01:42,701 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 294 transitions. Word has length 26 [2022-07-14 06:01:42,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:42,701 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 294 transitions. [2022-07-14 06:01:42,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:42,701 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 294 transitions. [2022-07-14 06:01:42,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 06:01:42,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:42,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:42,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:42,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:42,911 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:42,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:42,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1854162937, now seen corresponding path program 1 times [2022-07-14 06:01:42,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:42,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121967946] [2022-07-14 06:01:42,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:42,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:42,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:42,912 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:42,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-14 06:01:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:42,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 06:01:42,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:43,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:43,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:43,209 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:43,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121967946] [2022-07-14 06:01:43,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121967946] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:43,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:01:43,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2022-07-14 06:01:43,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709239975] [2022-07-14 06:01:43,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:43,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 06:01:43,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:43,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 06:01:43,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:01:43,210 INFO L87 Difference]: Start difference. First operand 227 states and 294 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:43,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:43,481 INFO L93 Difference]: Finished difference Result 234 states and 292 transitions. [2022-07-14 06:01:43,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:01:43,481 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-14 06:01:43,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:43,482 INFO L225 Difference]: With dead ends: 234 [2022-07-14 06:01:43,482 INFO L226 Difference]: Without dead ends: 234 [2022-07-14 06:01:43,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2022-07-14 06:01:43,483 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 190 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:43,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 179 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:43,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-14 06:01:43,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 188. [2022-07-14 06:01:43,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 182 states have (on average 1.2912087912087913) internal successors, (235), 187 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 235 transitions. [2022-07-14 06:01:43,487 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 235 transitions. Word has length 27 [2022-07-14 06:01:43,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:43,487 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 235 transitions. [2022-07-14 06:01:43,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:43,487 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 235 transitions. [2022-07-14 06:01:43,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-14 06:01:43,488 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:43,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:43,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:43,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:43,697 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:43,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:43,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1314778955, now seen corresponding path program 1 times [2022-07-14 06:01:43,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:43,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950271981] [2022-07-14 06:01:43,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:43,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:43,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:43,699 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:43,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-14 06:01:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:43,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 06:01:43,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 06:01:46,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:46,077 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:46,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950271981] [2022-07-14 06:01:46,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950271981] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:46,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:46,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:01:46,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902346244] [2022-07-14 06:01:46,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:46,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:01:46,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:46,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:01:46,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-07-14 06:01:46,078 INFO L87 Difference]: Start difference. First operand 188 states and 235 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:46,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:46,092 INFO L93 Difference]: Finished difference Result 192 states and 236 transitions. [2022-07-14 06:01:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:01:46,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-14 06:01:46,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:46,093 INFO L225 Difference]: With dead ends: 192 [2022-07-14 06:01:46,093 INFO L226 Difference]: Without dead ends: 190 [2022-07-14 06:01:46,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-07-14 06:01:46,094 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:46,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 100 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-07-14 06:01:46,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-07-14 06:01:46,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2022-07-14 06:01:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 182 states have (on average 1.2802197802197801) internal successors, (233), 187 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:46,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 233 transitions. [2022-07-14 06:01:46,096 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 233 transitions. Word has length 28 [2022-07-14 06:01:46,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:46,096 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 233 transitions. [2022-07-14 06:01:46,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:46,097 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 233 transitions. [2022-07-14 06:01:46,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-14 06:01:46,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:46,097 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:46,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:46,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:46,315 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:46,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:46,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1314778088, now seen corresponding path program 1 times [2022-07-14 06:01:46,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:46,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35741539] [2022-07-14 06:01:46,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:46,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:46,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:46,317 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:46,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-14 06:01:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:46,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:01:46,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 06:01:46,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 06:01:46,534 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:46,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35741539] [2022-07-14 06:01:46,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35741539] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:46,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:01:46,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-14 06:01:46,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030064014] [2022-07-14 06:01:46,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:46,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:01:46,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:46,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:01:46,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:01:46,535 INFO L87 Difference]: Start difference. First operand 188 states and 233 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:46,606 INFO L93 Difference]: Finished difference Result 266 states and 322 transitions. [2022-07-14 06:01:46,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:01:46,606 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-14 06:01:46,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:46,607 INFO L225 Difference]: With dead ends: 266 [2022-07-14 06:01:46,607 INFO L226 Difference]: Without dead ends: 262 [2022-07-14 06:01:46,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:01:46,607 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:46,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 167 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:46,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-07-14 06:01:46,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 249. [2022-07-14 06:01:46,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 243 states have (on average 1.2674897119341564) internal successors, (308), 248 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 308 transitions. [2022-07-14 06:01:46,611 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 308 transitions. Word has length 28 [2022-07-14 06:01:46,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:46,611 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 308 transitions. [2022-07-14 06:01:46,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:46,611 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 308 transitions. [2022-07-14 06:01:46,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-14 06:01:46,612 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:46,612 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:46,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:46,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:46,819 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:46,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:46,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1252738474, now seen corresponding path program 1 times [2022-07-14 06:01:46,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:46,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419972746] [2022-07-14 06:01:46,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:46,820 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:46,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:46,832 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:46,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-14 06:01:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:46,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 06:01:46,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:01:47,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:01:47,168 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:47,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419972746] [2022-07-14 06:01:47,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419972746] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:47,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:01:47,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2022-07-14 06:01:47,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514132547] [2022-07-14 06:01:47,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:47,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 06:01:47,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:47,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 06:01:47,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:01:47,169 INFO L87 Difference]: Start difference. First operand 249 states and 308 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:47,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:47,418 INFO L93 Difference]: Finished difference Result 327 states and 397 transitions. [2022-07-14 06:01:47,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:01:47,419 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-14 06:01:47,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:47,420 INFO L225 Difference]: With dead ends: 327 [2022-07-14 06:01:47,420 INFO L226 Difference]: Without dead ends: 323 [2022-07-14 06:01:47,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-07-14 06:01:47,421 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 184 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:47,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 230 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:47,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-07-14 06:01:47,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 249. [2022-07-14 06:01:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 243 states have (on average 1.2674897119341564) internal successors, (308), 248 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 308 transitions. [2022-07-14 06:01:47,427 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 308 transitions. Word has length 28 [2022-07-14 06:01:47,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:47,428 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 308 transitions. [2022-07-14 06:01:47,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:47,428 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 308 transitions. [2022-07-14 06:01:47,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 06:01:47,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:47,428 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:47,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-07-14 06:01:47,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:47,637 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:47,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:47,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1138703979, now seen corresponding path program 2 times [2022-07-14 06:01:47,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:47,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806228478] [2022-07-14 06:01:47,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:01:47,637 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:47,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:47,643 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:47,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-14 06:01:47,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:01:47,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:01:47,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:01:47,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:47,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:48,251 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 27 treesize of output 23 [2022-07-14 06:01:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:48,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:48,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806228478] [2022-07-14 06:01:48,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806228478] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:48,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:01:48,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-07-14 06:01:48,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418893078] [2022-07-14 06:01:48,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:48,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-14 06:01:48,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:48,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-14 06:01:48,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:01:48,479 INFO L87 Difference]: Start difference. First operand 249 states and 308 transitions. Second operand has 16 states, 15 states have (on average 3.6) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:50,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:50,367 INFO L93 Difference]: Finished difference Result 676 states and 817 transitions. [2022-07-14 06:01:50,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-14 06:01:50,368 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-14 06:01:50,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:50,369 INFO L225 Difference]: With dead ends: 676 [2022-07-14 06:01:50,369 INFO L226 Difference]: Without dead ends: 676 [2022-07-14 06:01:50,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2022-07-14 06:01:50,370 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1099 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:50,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1099 Valid, 355 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-14 06:01:50,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-07-14 06:01:50,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 263. [2022-07-14 06:01:50,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 257 states have (on average 1.284046692607004) internal successors, (330), 262 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:50,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 330 transitions. [2022-07-14 06:01:50,376 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 330 transitions. Word has length 29 [2022-07-14 06:01:50,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:50,376 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 330 transitions. [2022-07-14 06:01:50,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:50,376 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 330 transitions. [2022-07-14 06:01:50,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-14 06:01:50,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:50,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:50,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:50,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:50,585 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:50,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:50,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1019375167, now seen corresponding path program 1 times [2022-07-14 06:01:50,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:50,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400519391] [2022-07-14 06:01:50,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:50,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:50,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:50,587 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:50,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-14 06:01:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:50,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 06:01:50,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 06:01:53,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:53,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:53,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400519391] [2022-07-14 06:01:53,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400519391] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:53,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:53,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:01:53,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145960337] [2022-07-14 06:01:53,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:53,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:01:53,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:53,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:01:53,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-07-14 06:01:53,020 INFO L87 Difference]: Start difference. First operand 263 states and 330 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:53,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:53,024 INFO L93 Difference]: Finished difference Result 285 states and 353 transitions. [2022-07-14 06:01:53,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:01:53,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-14 06:01:53,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:53,026 INFO L225 Difference]: With dead ends: 285 [2022-07-14 06:01:53,026 INFO L226 Difference]: Without dead ends: 257 [2022-07-14 06:01:53,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-07-14 06:01:53,027 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:53,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 115 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2022-07-14 06:01:53,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-07-14 06:01:53,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2022-07-14 06:01:53,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 251 states have (on average 1.2868525896414342) internal successors, (323), 256 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:53,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 323 transitions. [2022-07-14 06:01:53,030 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 323 transitions. Word has length 31 [2022-07-14 06:01:53,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:53,030 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 323 transitions. [2022-07-14 06:01:53,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:53,030 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 323 transitions. [2022-07-14 06:01:53,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-14 06:01:53,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:53,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:53,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-07-14 06:01:53,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:53,239 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:53,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1528848257, now seen corresponding path program 1 times [2022-07-14 06:01:53,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:53,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222273154] [2022-07-14 06:01:53,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:53,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:53,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:53,241 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:53,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-14 06:01:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:53,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 06:01:53,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 06:01:55,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:01:55,723 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:55,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222273154] [2022-07-14 06:01:55,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222273154] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:55,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:55,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:01:55,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284315638] [2022-07-14 06:01:55,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:55,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:01:55,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:55,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:01:55,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-07-14 06:01:55,728 INFO L87 Difference]: Start difference. First operand 257 states and 323 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:55,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:55,743 INFO L93 Difference]: Finished difference Result 256 states and 322 transitions. [2022-07-14 06:01:55,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:01:55,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-14 06:01:55,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:55,753 INFO L225 Difference]: With dead ends: 256 [2022-07-14 06:01:55,753 INFO L226 Difference]: Without dead ends: 234 [2022-07-14 06:01:55,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-07-14 06:01:55,754 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:55,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 85 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 16 Unchecked, 0.0s Time] [2022-07-14 06:01:55,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-14 06:01:55,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2022-07-14 06:01:55,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.2763157894736843) internal successors, (291), 232 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:55,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 291 transitions. [2022-07-14 06:01:55,758 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 291 transitions. Word has length 31 [2022-07-14 06:01:55,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:55,758 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 291 transitions. [2022-07-14 06:01:55,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:55,759 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 291 transitions. [2022-07-14 06:01:55,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-14 06:01:55,759 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:55,759 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-14 06:01:55,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:55,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:55,971 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:55,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:55,972 INFO L85 PathProgramCache]: Analyzing trace with hash -112944909, now seen corresponding path program 2 times [2022-07-14 06:01:55,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:55,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014034545] [2022-07-14 06:01:55,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:01:55,972 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:55,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:55,974 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:55,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-14 06:01:56,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:01:56,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:01:56,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:01:56,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:56,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:01:56,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:56,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-07-14 06:01:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:01:56,856 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:01:56,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014034545] [2022-07-14 06:01:56,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014034545] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:56,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:01:56,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-07-14 06:01:56,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025256431] [2022-07-14 06:01:56,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:56,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:01:56,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:01:56,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:01:56,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:01:56,857 INFO L87 Difference]: Start difference. First operand 233 states and 291 transitions. Second operand has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:58,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:58,455 INFO L93 Difference]: Finished difference Result 773 states and 989 transitions. [2022-07-14 06:01:58,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 06:01:58,456 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-14 06:01:58,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:58,461 INFO L225 Difference]: With dead ends: 773 [2022-07-14 06:01:58,462 INFO L226 Difference]: Without dead ends: 773 [2022-07-14 06:01:58,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-07-14 06:01:58,462 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 573 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:58,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [573 Valid, 274 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-14 06:01:58,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-07-14 06:01:58,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 272. [2022-07-14 06:01:58,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 267 states have (on average 1.2771535580524345) internal successors, (341), 271 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:58,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 341 transitions. [2022-07-14 06:01:58,473 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 341 transitions. Word has length 32 [2022-07-14 06:01:58,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:58,474 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 341 transitions. [2022-07-14 06:01:58,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:58,474 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 341 transitions. [2022-07-14 06:01:58,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-14 06:01:58,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:58,474 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:58,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-07-14 06:01:58,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:01:58,683 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:01:58,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:58,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1409463453, now seen corresponding path program 3 times [2022-07-14 06:01:58,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:01:58,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546309222] [2022-07-14 06:01:58,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:01:58,683 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:01:58,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:01:58,684 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:01:58,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-14 06:01:58,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-14 06:01:58,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:01:58,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-14 06:01:58,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:58,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:01:58,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:01:58,859 INFO L356 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-07-14 06:01:58,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2022-07-14 06:01:58,864 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 15 treesize of output 13 [2022-07-14 06:01:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 06:01:59,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:00,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:02:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 06:02:00,275 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:02:00,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546309222] [2022-07-14 06:02:00,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546309222] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:00,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:02:00,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-14 06:02:00,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556682537] [2022-07-14 06:02:00,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:00,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-14 06:02:00,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:02:00,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-14 06:02:00,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:02:00,276 INFO L87 Difference]: Start difference. First operand 272 states and 341 transitions. Second operand has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:02,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:02,662 INFO L93 Difference]: Finished difference Result 579 states and 712 transitions. [2022-07-14 06:02:02,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-14 06:02:02,664 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-14 06:02:02,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:02,666 INFO L225 Difference]: With dead ends: 579 [2022-07-14 06:02:02,666 INFO L226 Difference]: Without dead ends: 579 [2022-07-14 06:02:02,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2022-07-14 06:02:02,668 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 360 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:02,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 267 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 315 Invalid, 0 Unknown, 56 Unchecked, 1.5s Time] [2022-07-14 06:02:02,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-07-14 06:02:02,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 357. [2022-07-14 06:02:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 352 states have (on average 1.3125) internal successors, (462), 356 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 462 transitions. [2022-07-14 06:02:02,674 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 462 transitions. Word has length 33 [2022-07-14 06:02:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:02,674 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 462 transitions. [2022-07-14 06:02:02,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:02,674 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 462 transitions. [2022-07-14 06:02:02,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-14 06:02:02,676 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:02,676 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:02,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:02,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:02:02,886 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:02:02,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:02,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1249695552, now seen corresponding path program 3 times [2022-07-14 06:02:02,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:02:02,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178131359] [2022-07-14 06:02:02,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:02:02,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:02:02,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:02:02,890 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:02:02,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-14 06:02:03,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-14 06:02:03,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:02:03,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 06:02:03,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:03,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:02:03,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:02:03,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:02:03,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-07-14 06:02:03,087 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:02:03,087 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 25 treesize of output 21 [2022-07-14 06:02:03,788 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:02:03,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:05,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:02:05,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:02:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:02:05,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:02:05,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178131359] [2022-07-14 06:02:05,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178131359] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:05,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:02:05,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-07-14 06:02:05,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053170644] [2022-07-14 06:02:05,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:05,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-14 06:02:05,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:02:05,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-14 06:02:05,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:02:05,550 INFO L87 Difference]: Start difference. First operand 357 states and 462 transitions. Second operand has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:14,979 INFO L93 Difference]: Finished difference Result 421 states and 542 transitions. [2022-07-14 06:02:14,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-14 06:02:14,979 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-14 06:02:14,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:14,983 INFO L225 Difference]: With dead ends: 421 [2022-07-14 06:02:14,983 INFO L226 Difference]: Without dead ends: 421 [2022-07-14 06:02:14,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=669, Invalid=1493, Unknown=0, NotChecked=0, Total=2162 [2022-07-14 06:02:14,983 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 23 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:14,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 277 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 127 Invalid, 0 Unknown, 34 Unchecked, 0.6s Time] [2022-07-14 06:02:14,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-07-14 06:02:14,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2022-07-14 06:02:14,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 416 states have (on average 1.3028846153846154) internal successors, (542), 420 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:14,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 542 transitions. [2022-07-14 06:02:14,987 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 542 transitions. Word has length 35 [2022-07-14 06:02:14,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:14,988 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 542 transitions. [2022-07-14 06:02:14,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:14,988 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 542 transitions. [2022-07-14 06:02:14,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-14 06:02:14,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:14,988 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:15,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:15,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:02:15,192 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:02:15,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:15,192 INFO L85 PathProgramCache]: Analyzing trace with hash -524293744, now seen corresponding path program 3 times [2022-07-14 06:02:15,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:02:15,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237374552] [2022-07-14 06:02:15,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:02:15,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:02:15,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:02:15,193 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:02:15,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-14 06:02:15,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-14 06:02:15,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:02:15,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-14 06:02:15,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:15,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:02:15,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:02:15,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:02:15,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2022-07-14 06:02:15,463 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:02:15,463 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 25 treesize of output 21 [2022-07-14 06:02:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 06:02:15,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:02:19,000 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:02:19,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237374552] [2022-07-14 06:02:19,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237374552] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:19,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:02:19,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-07-14 06:02:19,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366726473] [2022-07-14 06:02:19,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:19,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-14 06:02:19,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:02:19,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 06:02:19,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:02:19,001 INFO L87 Difference]: Start difference. First operand 421 states and 542 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:24,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:24,016 INFO L93 Difference]: Finished difference Result 764 states and 989 transitions. [2022-07-14 06:02:24,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-14 06:02:24,018 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-14 06:02:24,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:24,020 INFO L225 Difference]: With dead ends: 764 [2022-07-14 06:02:24,020 INFO L226 Difference]: Without dead ends: 729 [2022-07-14 06:02:24,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2022-07-14 06:02:24,021 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 402 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:24,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 332 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-14 06:02:24,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-07-14 06:02:24,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 662. [2022-07-14 06:02:24,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 657 states have (on average 1.3242009132420092) internal successors, (870), 661 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:24,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 870 transitions. [2022-07-14 06:02:24,042 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 870 transitions. Word has length 40 [2022-07-14 06:02:24,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:24,042 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 870 transitions. [2022-07-14 06:02:24,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:24,042 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 870 transitions. [2022-07-14 06:02:24,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-14 06:02:24,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:24,043 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:24,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:24,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:02:24,244 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:02:24,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:24,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1396579989, now seen corresponding path program 3 times [2022-07-14 06:02:24,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:02:24,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44113347] [2022-07-14 06:02:24,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:02:24,245 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:02:24,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:02:24,246 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:02:24,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-14 06:02:24,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-14 06:02:24,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:02:24,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-14 06:02:24,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:24,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:02:24,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:02:24,508 INFO L356 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-07-14 06:02:24,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2022-07-14 06:02:24,515 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 15 treesize of output 13 [2022-07-14 06:02:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:25,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:27,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:02:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:27,782 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:02:27,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44113347] [2022-07-14 06:02:27,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44113347] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:27,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:02:27,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-07-14 06:02:27,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497395874] [2022-07-14 06:02:27,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:27,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-14 06:02:27,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:02:27,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-14 06:02:27,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2022-07-14 06:02:27,783 INFO L87 Difference]: Start difference. First operand 662 states and 870 transitions. Second operand has 26 states, 25 states have (on average 3.16) internal successors, (79), 26 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:40,622 INFO L93 Difference]: Finished difference Result 4693 states and 6495 transitions. [2022-07-14 06:02:40,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-14 06:02:40,624 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.16) internal successors, (79), 26 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-14 06:02:40,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:40,636 INFO L225 Difference]: With dead ends: 4693 [2022-07-14 06:02:40,636 INFO L226 Difference]: Without dead ends: 4693 [2022-07-14 06:02:40,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=657, Invalid=1599, Unknown=0, NotChecked=0, Total=2256 [2022-07-14 06:02:40,637 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1200 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:40,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1200 Valid, 889 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1033 Invalid, 0 Unknown, 16 Unchecked, 4.8s Time] [2022-07-14 06:02:40,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4693 states. [2022-07-14 06:02:40,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4693 to 758. [2022-07-14 06:02:40,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 753 states have (on average 1.3147410358565736) internal successors, (990), 757 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:40,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 990 transitions. [2022-07-14 06:02:40,664 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 990 transitions. Word has length 41 [2022-07-14 06:02:40,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:40,664 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 990 transitions. [2022-07-14 06:02:40,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.16) internal successors, (79), 26 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:40,664 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 990 transitions. [2022-07-14 06:02:40,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-14 06:02:40,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:40,665 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:40,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:40,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:02:40,875 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:02:40,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:40,876 INFO L85 PathProgramCache]: Analyzing trace with hash 829184327, now seen corresponding path program 1 times [2022-07-14 06:02:40,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:02:40,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076076138] [2022-07-14 06:02:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:02:40,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:02:40,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:02:40,877 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:02:40,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-07-14 06:02:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:41,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 06:02:41,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:41,045 INFO L356 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-07-14 06:02:41,045 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-07-14 06:02:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 06:02:41,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 06:02:42,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:02:42,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076076138] [2022-07-14 06:02:42,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076076138] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:42,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:02:42,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-07-14 06:02:42,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403805577] [2022-07-14 06:02:42,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:42,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 06:02:42,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:02:42,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 06:02:42,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:02:42,158 INFO L87 Difference]: Start difference. First operand 758 states and 990 transitions. Second operand has 14 states, 13 states have (on average 6.153846153846154) internal successors, (80), 14 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:42,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:42,522 INFO L93 Difference]: Finished difference Result 855 states and 1111 transitions. [2022-07-14 06:02:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:02:42,523 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 6.153846153846154) internal successors, (80), 14 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-14 06:02:42,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:42,525 INFO L225 Difference]: With dead ends: 855 [2022-07-14 06:02:42,525 INFO L226 Difference]: Without dead ends: 826 [2022-07-14 06:02:42,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:02:42,526 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 119 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:42,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 230 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-07-14 06:02:42,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2022-07-14 06:02:42,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 771. [2022-07-14 06:02:42,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 766 states have (on average 1.3133159268929504) internal successors, (1006), 770 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:42,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1006 transitions. [2022-07-14 06:02:42,536 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1006 transitions. Word has length 41 [2022-07-14 06:02:42,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:42,536 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 1006 transitions. [2022-07-14 06:02:42,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 6.153846153846154) internal successors, (80), 14 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:42,536 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1006 transitions. [2022-07-14 06:02:42,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-14 06:02:42,537 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:42,537 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:42,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:42,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:02:42,744 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:02:42,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:42,745 INFO L85 PathProgramCache]: Analyzing trace with hash 735316555, now seen corresponding path program 4 times [2022-07-14 06:02:42,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:02:42,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618416495] [2022-07-14 06:02:42,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:02:42,745 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:02:42,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:02:42,746 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:02:42,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-07-14 06:02:42,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:02:42,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:02:42,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 06:02:42,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 25 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 06:02:43,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 25 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 06:02:43,367 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:02:43,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618416495] [2022-07-14 06:02:43,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618416495] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:43,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:02:43,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2022-07-14 06:02:43,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433550143] [2022-07-14 06:02:43,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:43,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-14 06:02:43,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:02:43,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-14 06:02:43,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:02:43,369 INFO L87 Difference]: Start difference. First operand 771 states and 1006 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:44,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:44,479 INFO L93 Difference]: Finished difference Result 1837 states and 2316 transitions. [2022-07-14 06:02:44,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-14 06:02:44,480 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-14 06:02:44,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:44,484 INFO L225 Difference]: With dead ends: 1837 [2022-07-14 06:02:44,484 INFO L226 Difference]: Without dead ends: 1743 [2022-07-14 06:02:44,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2022-07-14 06:02:44,485 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 586 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:44,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 925 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-14 06:02:44,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2022-07-14 06:02:44,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1266. [2022-07-14 06:02:44,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1261 states have (on average 1.3402061855670102) internal successors, (1690), 1265 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:44,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1690 transitions. [2022-07-14 06:02:44,497 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1690 transitions. Word has length 45 [2022-07-14 06:02:44,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:44,497 INFO L495 AbstractCegarLoop]: Abstraction has 1266 states and 1690 transitions. [2022-07-14 06:02:44,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:44,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1690 transitions. [2022-07-14 06:02:44,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-14 06:02:44,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:44,499 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:44,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-07-14 06:02:44,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:02:44,703 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:02:44,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:44,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1022969014, now seen corresponding path program 4 times [2022-07-14 06:02:44,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:02:44,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047659457] [2022-07-14 06:02:44,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:02:44,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:02:44,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:02:44,705 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:02:44,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-07-14 06:02:44,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:02:44,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:02:44,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 06:02:44,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 06:02:45,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 06:02:45,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:02:45,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047659457] [2022-07-14 06:02:45,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047659457] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:45,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:02:45,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2022-07-14 06:02:45,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640410087] [2022-07-14 06:02:45,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:45,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-14 06:02:45,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:02:45,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-14 06:02:45,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-07-14 06:02:45,548 INFO L87 Difference]: Start difference. First operand 1266 states and 1690 transitions. Second operand has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:46,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:46,530 INFO L93 Difference]: Finished difference Result 2148 states and 2867 transitions. [2022-07-14 06:02:46,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:02:46,531 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-14 06:02:46,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:46,544 INFO L225 Difference]: With dead ends: 2148 [2022-07-14 06:02:46,544 INFO L226 Difference]: Without dead ends: 1928 [2022-07-14 06:02:46,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=299, Invalid=1107, Unknown=0, NotChecked=0, Total=1406 [2022-07-14 06:02:46,545 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 535 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:46,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 898 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:02:46,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2022-07-14 06:02:46,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1666. [2022-07-14 06:02:46,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1661 states have (on average 1.3425647200481639) internal successors, (2230), 1665 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2230 transitions. [2022-07-14 06:02:46,561 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2230 transitions. Word has length 52 [2022-07-14 06:02:46,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:46,561 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2230 transitions. [2022-07-14 06:02:46,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:46,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2230 transitions. [2022-07-14 06:02:46,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-14 06:02:46,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:46,563 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:46,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-07-14 06:02:46,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:02:46,769 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:02:46,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:46,770 INFO L85 PathProgramCache]: Analyzing trace with hash -878193103, now seen corresponding path program 2 times [2022-07-14 06:02:46,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:02:46,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251691880] [2022-07-14 06:02:46,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:02:46,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:02:46,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:02:46,771 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:02:46,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-07-14 06:02:46,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:02:46,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:02:46,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 06:02:46,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:46,975 INFO L356 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-07-14 06:02:46,975 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-07-14 06:02:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 06:02:47,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 06:02:49,222 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:02:49,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251691880] [2022-07-14 06:02:49,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251691880] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:49,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:02:49,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-07-14 06:02:49,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680151166] [2022-07-14 06:02:49,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:49,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-14 06:02:49,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:02:49,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-14 06:02:49,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-07-14 06:02:49,223 INFO L87 Difference]: Start difference. First operand 1666 states and 2230 transitions. Second operand has 19 states, 18 states have (on average 6.111111111111111) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:50,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:50,980 INFO L93 Difference]: Finished difference Result 1989 states and 2657 transitions. [2022-07-14 06:02:50,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:02:50,981 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 6.111111111111111) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-14 06:02:50,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:50,985 INFO L225 Difference]: With dead ends: 1989 [2022-07-14 06:02:50,985 INFO L226 Difference]: Without dead ends: 1894 [2022-07-14 06:02:50,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2022-07-14 06:02:50,986 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 121 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:50,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 549 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 171 Invalid, 0 Unknown, 59 Unchecked, 0.8s Time] [2022-07-14 06:02:50,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2022-07-14 06:02:50,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1564. [2022-07-14 06:02:51,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1559 states have (on average 1.3470173187940988) internal successors, (2100), 1563 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2100 transitions. [2022-07-14 06:02:51,002 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2100 transitions. Word has length 56 [2022-07-14 06:02:51,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:51,002 INFO L495 AbstractCegarLoop]: Abstraction has 1564 states and 2100 transitions. [2022-07-14 06:02:51,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 6.111111111111111) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:51,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2100 transitions. [2022-07-14 06:02:51,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-14 06:02:51,003 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:51,004 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:51,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:51,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:02:51,207 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:02:51,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:51,208 INFO L85 PathProgramCache]: Analyzing trace with hash -564407577, now seen corresponding path program 5 times [2022-07-14 06:02:51,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:02:51,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655966399] [2022-07-14 06:02:51,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:02:51,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:02:51,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:02:51,209 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:02:51,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-07-14 06:02:51,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-14 06:02:51,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:02:51,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 06:02:51,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 06:02:51,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:52,710 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 27 treesize of output 23 [2022-07-14 06:02:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 06:02:53,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:02:53,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655966399] [2022-07-14 06:02:53,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655966399] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:53,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:02:53,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-07-14 06:02:53,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292834214] [2022-07-14 06:02:53,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:53,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-14 06:02:53,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:02:53,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-14 06:02:53,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-14 06:02:53,383 INFO L87 Difference]: Start difference. First operand 1564 states and 2100 transitions. Second operand has 20 states, 19 states have (on average 5.684210526315789) internal successors, (108), 20 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:58,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:58,842 INFO L93 Difference]: Finished difference Result 10301 states and 14215 transitions. [2022-07-14 06:02:58,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-14 06:02:58,843 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.684210526315789) internal successors, (108), 20 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-14 06:02:58,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:58,864 INFO L225 Difference]: With dead ends: 10301 [2022-07-14 06:02:58,864 INFO L226 Difference]: Without dead ends: 10301 [2022-07-14 06:02:58,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=509, Invalid=2247, Unknown=0, NotChecked=0, Total=2756 [2022-07-14 06:02:58,866 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 1739 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1739 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:58,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1739 Valid, 1022 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-14 06:02:58,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10301 states. [2022-07-14 06:02:58,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10301 to 1969. [2022-07-14 06:02:58,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1964 states have (on average 1.3533604887983706) internal successors, (2658), 1968 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2658 transitions. [2022-07-14 06:02:58,925 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2658 transitions. Word has length 56 [2022-07-14 06:02:58,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:58,925 INFO L495 AbstractCegarLoop]: Abstraction has 1969 states and 2658 transitions. [2022-07-14 06:02:58,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.684210526315789) internal successors, (108), 20 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:58,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2658 transitions. [2022-07-14 06:02:58,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:02:58,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:58,927 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:58,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:59,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:02:59,135 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:02:59,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:59,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1544267116, now seen corresponding path program 5 times [2022-07-14 06:02:59,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:02:59,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691967979] [2022-07-14 06:02:59,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:02:59,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:02:59,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:02:59,137 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:02:59,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-07-14 06:02:59,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-14 06:02:59,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:02:59,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-14 06:02:59,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:59,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:03:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 35 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:01,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:03:01,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691967979] [2022-07-14 06:03:01,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691967979] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:03:01,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:03:01,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2022-07-14 06:03:01,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143296396] [2022-07-14 06:03:01,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:03:01,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-14 06:03:01,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:03:01,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-14 06:03:01,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2022-07-14 06:03:01,632 INFO L87 Difference]: Start difference. First operand 1969 states and 2658 transitions. Second operand has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:04,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:03:04,381 INFO L93 Difference]: Finished difference Result 5426 states and 6893 transitions. [2022-07-14 06:03:04,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-14 06:03:04,382 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-14 06:03:04,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:03:04,389 INFO L225 Difference]: With dead ends: 5426 [2022-07-14 06:03:04,389 INFO L226 Difference]: Without dead ends: 5380 [2022-07-14 06:03:04,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1165, Invalid=5807, Unknown=0, NotChecked=0, Total=6972 [2022-07-14 06:03:04,391 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 1981 mSDsluCounter, 3228 mSDsCounter, 0 mSdLazyCounter, 2006 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1981 SdHoareTripleChecker+Valid, 3496 SdHoareTripleChecker+Invalid, 2187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:03:04,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1981 Valid, 3496 Invalid, 2187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2006 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-14 06:03:04,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5380 states. [2022-07-14 06:03:04,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5380 to 2752. [2022-07-14 06:03:04,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2747 states have (on average 1.3796869311976703) internal successors, (3790), 2751 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:04,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 3790 transitions. [2022-07-14 06:03:04,432 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 3790 transitions. Word has length 57 [2022-07-14 06:03:04,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:03:04,432 INFO L495 AbstractCegarLoop]: Abstraction has 2752 states and 3790 transitions. [2022-07-14 06:03:04,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:04,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 3790 transitions. [2022-07-14 06:03:04,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:03:04,433 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:03:04,433 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:03:04,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-07-14 06:03:04,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:03:04,634 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:03:04,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:03:04,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1716480926, now seen corresponding path program 1 times [2022-07-14 06:03:04,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:03:04,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021205916] [2022-07-14 06:03:04,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:03:04,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:03:04,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:03:04,636 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:03:04,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-07-14 06:03:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:03:04,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 06:03:04,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:03:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-14 06:03:05,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:03:05,728 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 38 treesize of output 32 [2022-07-14 06:03:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-14 06:03:06,828 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:03:06,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021205916] [2022-07-14 06:03:06,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021205916] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:03:06,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:03:06,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-07-14 06:03:06,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674618414] [2022-07-14 06:03:06,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:03:06,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-14 06:03:06,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:03:06,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-14 06:03:06,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:03:06,829 INFO L87 Difference]: Start difference. First operand 2752 states and 3790 transitions. Second operand has 22 states, 21 states have (on average 4.095238095238095) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:08,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:03:08,442 INFO L93 Difference]: Finished difference Result 6315 states and 7882 transitions. [2022-07-14 06:03:08,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-14 06:03:08,444 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.095238095238095) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-14 06:03:08,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:03:08,451 INFO L225 Difference]: With dead ends: 6315 [2022-07-14 06:03:08,452 INFO L226 Difference]: Without dead ends: 6315 [2022-07-14 06:03:08,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2022-07-14 06:03:08,453 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 556 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:03:08,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 465 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-14 06:03:08,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6315 states. [2022-07-14 06:03:08,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6315 to 2713. [2022-07-14 06:03:08,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2708 states have (on average 1.3777695716395864) internal successors, (3731), 2712 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:08,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 3731 transitions. [2022-07-14 06:03:08,510 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 3731 transitions. Word has length 57 [2022-07-14 06:03:08,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:03:08,510 INFO L495 AbstractCegarLoop]: Abstraction has 2713 states and 3731 transitions. [2022-07-14 06:03:08,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.095238095238095) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:08,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 3731 transitions. [2022-07-14 06:03:08,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-14 06:03:08,512 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:03:08,512 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:03:08,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-07-14 06:03:08,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:03:08,722 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:03:08,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:03:08,722 INFO L85 PathProgramCache]: Analyzing trace with hash -987577769, now seen corresponding path program 6 times [2022-07-14 06:03:08,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:03:08,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999341055] [2022-07-14 06:03:08,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:03:08,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:03:08,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:03:08,724 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:03:08,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-07-14 06:03:09,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-14 06:03:09,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:03:09,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-14 06:03:09,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:03:09,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:03:09,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:03:09,098 INFO L356 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-07-14 06:03:09,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2022-07-14 06:03:09,103 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 15 treesize of output 13 [2022-07-14 06:03:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-14 06:03:09,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:03:11,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:03:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-14 06:03:12,004 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:03:12,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999341055] [2022-07-14 06:03:12,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999341055] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:03:12,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:03:12,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-07-14 06:03:12,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471310993] [2022-07-14 06:03:12,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:03:12,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-14 06:03:12,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:03:12,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-14 06:03:12,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-07-14 06:03:12,005 INFO L87 Difference]: Start difference. First operand 2713 states and 3731 transitions. Second operand has 24 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 24 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:15,294 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:03:18,127 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:03:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:03:23,041 INFO L93 Difference]: Finished difference Result 7261 states and 8960 transitions. [2022-07-14 06:03:23,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-14 06:03:23,042 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 24 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-14 06:03:23,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:03:23,052 INFO L225 Difference]: With dead ends: 7261 [2022-07-14 06:03:23,052 INFO L226 Difference]: Without dead ends: 6855 [2022-07-14 06:03:23,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=619, Invalid=1733, Unknown=0, NotChecked=0, Total=2352 [2022-07-14 06:03:23,053 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 797 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:03:23,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [797 Valid, 581 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 866 Invalid, 0 Unknown, 49 Unchecked, 6.7s Time] [2022-07-14 06:03:23,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6855 states. [2022-07-14 06:03:23,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6855 to 2333. [2022-07-14 06:03:23,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 2328 states have (on average 1.3926116838487972) internal successors, (3242), 2332 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:23,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 3242 transitions. [2022-07-14 06:03:23,100 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 3242 transitions. Word has length 61 [2022-07-14 06:03:23,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:03:23,101 INFO L495 AbstractCegarLoop]: Abstraction has 2333 states and 3242 transitions. [2022-07-14 06:03:23,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 24 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:23,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 3242 transitions. [2022-07-14 06:03:23,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-14 06:03:23,102 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:03:23,102 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:03:23,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-07-14 06:03:23,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:03:23,307 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:03:23,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:03:23,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1288171396, now seen corresponding path program 6 times [2022-07-14 06:03:23,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:03:23,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473678562] [2022-07-14 06:03:23,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:03:23,308 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:03:23,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:03:23,309 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:03:23,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-07-14 06:03:23,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-14 06:03:23,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:03:23,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-14 06:03:23,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:03:23,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:03:23,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:03:23,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:03:23,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2022-07-14 06:03:23,584 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:03:23,584 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 25 treesize of output 21 [2022-07-14 06:03:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-14 06:03:24,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:03:26,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:03:26,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:03:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-14 06:03:26,653 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:03:26,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473678562] [2022-07-14 06:03:26,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473678562] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:03:26,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:03:26,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-07-14 06:03:26,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873341223] [2022-07-14 06:03:26,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:03:26,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-14 06:03:26,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:03:26,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-14 06:03:26,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-07-14 06:03:26,655 INFO L87 Difference]: Start difference. First operand 2333 states and 3242 transitions. Second operand has 20 states, 19 states have (on average 5.368421052631579) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:30,135 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:03:32,727 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:03:34,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:03:34,420 INFO L93 Difference]: Finished difference Result 5944 states and 8370 transitions. [2022-07-14 06:03:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-14 06:03:34,421 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.368421052631579) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-14 06:03:34,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:03:34,435 INFO L225 Difference]: With dead ends: 5944 [2022-07-14 06:03:34,435 INFO L226 Difference]: Without dead ends: 5944 [2022-07-14 06:03:34,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=410, Invalid=1072, Unknown=0, NotChecked=0, Total=1482 [2022-07-14 06:03:34,437 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 400 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:03:34,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 377 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 296 Invalid, 1 Unknown, 44 Unchecked, 4.6s Time] [2022-07-14 06:03:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5944 states. [2022-07-14 06:03:34,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5944 to 5603. [2022-07-14 06:03:34,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5603 states, 5598 states have (on average 1.4258663808503036) internal successors, (7982), 5602 states have internal predecessors, (7982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:34,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 7982 transitions. [2022-07-14 06:03:34,492 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 7982 transitions. Word has length 64 [2022-07-14 06:03:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:03:34,492 INFO L495 AbstractCegarLoop]: Abstraction has 5603 states and 7982 transitions. [2022-07-14 06:03:34,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.368421052631579) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 7982 transitions. [2022-07-14 06:03:34,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-14 06:03:34,494 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:03:34,494 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2022-07-14 06:03:34,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-07-14 06:03:34,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:03:34,703 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:03:34,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:03:34,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1770568872, now seen corresponding path program 4 times [2022-07-14 06:03:34,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:03:34,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262778440] [2022-07-14 06:03:34,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:03:34,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:03:34,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:03:34,705 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:03:34,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-07-14 06:03:34,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:03:34,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:03:34,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-14 06:03:34,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:03:34,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:03:34,967 INFO L356 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2022-07-14 06:03:34,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 24 [2022-07-14 06:03:34,973 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 11 treesize of output 9 [2022-07-14 06:03:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:03:36,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:03:44,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:03:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:03:44,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:03:44,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262778440] [2022-07-14 06:03:44,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262778440] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:03:44,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:03:44,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2022-07-14 06:03:44,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592014172] [2022-07-14 06:03:44,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:03:44,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-14 06:03:44,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:03:44,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-14 06:03:44,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=1524, Unknown=0, NotChecked=0, Total=2070 [2022-07-14 06:03:44,974 INFO L87 Difference]: Start difference. First operand 5603 states and 7982 transitions. Second operand has 46 states, 45 states have (on average 2.933333333333333) internal successors, (132), 46 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:56,669 WARN L233 SmtUtils]: Spent 8.14s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:03:58,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:04:00,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:04:02,846 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:04:04,673 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:04:11,921 WARN L233 SmtUtils]: Spent 6.79s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:04:29,488 WARN L233 SmtUtils]: Spent 16.81s on a formula simplification. DAG size of input: 163 DAG size of output: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:04:32,124 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:04:34,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:04:36,189 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:04:43,712 WARN L233 SmtUtils]: Spent 6.20s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:04:56,342 WARN L233 SmtUtils]: Spent 12.08s on a formula simplification. DAG size of input: 152 DAG size of output: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:04:58,765 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:05:00,767 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:05:02,770 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:05:08,290 WARN L233 SmtUtils]: Spent 5.03s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:05:18,669 WARN L233 SmtUtils]: Spent 9.33s on a formula simplification. DAG size of input: 141 DAG size of output: 141 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:05:21,293 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:05:23,296 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:05:25,299 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:05:38,716 WARN L233 SmtUtils]: Spent 8.56s on a formula simplification. DAG size of input: 131 DAG size of output: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:05:41,259 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:05:43,262 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:05:45,292 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []