./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.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 bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 21:10:44,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 21:10:44,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 21:10:44,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 21:10:44,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 21:10:44,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 21:10:44,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 21:10:44,305 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 21:10:44,306 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 21:10:44,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 21:10:44,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 21:10:44,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 21:10:44,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 21:10:44,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 21:10:44,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 21:10:44,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 21:10:44,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 21:10:44,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 21:10:44,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 21:10:44,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 21:10:44,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 21:10:44,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 21:10:44,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 21:10:44,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 21:10:44,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 21:10:44,331 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 21:10:44,332 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 21:10:44,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 21:10:44,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 21:10:44,334 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 21:10:44,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 21:10:44,335 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 21:10:44,336 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 21:10:44,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 21:10:44,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 21:10:44,338 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 21:10:44,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 21:10:44,339 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 21:10:44,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 21:10:44,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 21:10:44,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 21:10:44,340 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 21:10:44,361 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 21:10:44,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 21:10:44,362 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 21:10:44,362 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 21:10:44,363 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 21:10:44,363 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 21:10:44,363 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 21:10:44,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 21:10:44,364 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 21:10:44,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 21:10:44,364 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 21:10:44,365 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 21:10:44,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 21:10:44,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 21:10:44,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 21:10:44,365 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 21:10:44,365 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 21:10:44,366 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 21:10:44,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 21:10:44,366 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 21:10:44,366 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 21:10:44,366 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 21:10:44,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 21:10:44,367 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 21:10:44,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 21:10:44,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:10:44,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 21:10:44,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 21:10:44,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 21:10:44,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 21:10:44,368 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 21:10:44,368 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 [2021-12-18 21:10:44,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 21:10:44,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 21:10:44,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 21:10:44,590 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 21:10:44,591 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 21:10:44,592 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2021-12-18 21:10:44,650 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c965a1e9b/0aa2273a5d4a43539dfab1dcb293f05f/FLAG9a74c2841 [2021-12-18 21:10:45,059 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 21:10:45,060 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2021-12-18 21:10:45,074 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c965a1e9b/0aa2273a5d4a43539dfab1dcb293f05f/FLAG9a74c2841 [2021-12-18 21:10:45,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c965a1e9b/0aa2273a5d4a43539dfab1dcb293f05f [2021-12-18 21:10:45,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 21:10:45,088 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 21:10:45,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 21:10:45,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 21:10:45,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 21:10:45,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:10:45" (1/1) ... [2021-12-18 21:10:45,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ea1dcf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:45, skipping insertion in model container [2021-12-18 21:10:45,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:10:45" (1/1) ... [2021-12-18 21:10:45,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 21:10:45,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:10:45,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:10:45,473 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-18 21:10:45,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@26df7e50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:45, skipping insertion in model container [2021-12-18 21:10:45,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 21:10:45,475 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-18 21:10:45,476 INFO L158 Benchmark]: Toolchain (without parser) took 386.85ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 80.4MB in the beginning and 104.4MB in the end (delta: -23.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-18 21:10:45,477 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 109.1MB. Free memory is still 66.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 21:10:45,478 INFO L158 Benchmark]: CACSL2BoogieTranslator took 384.16ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 80.0MB in the beginning and 104.4MB in the end (delta: -24.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-18 21:10:45,479 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 109.1MB. Free memory is still 66.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 384.16ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 80.0MB in the beginning and 104.4MB in the end (delta: -24.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.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 bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 21:10:46,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 21:10:46,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 21:10:46,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 21:10:46,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 21:10:46,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 21:10:46,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 21:10:46,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 21:10:47,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 21:10:47,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 21:10:47,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 21:10:47,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 21:10:47,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 21:10:47,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 21:10:47,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 21:10:47,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 21:10:47,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 21:10:47,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 21:10:47,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 21:10:47,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 21:10:47,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 21:10:47,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 21:10:47,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 21:10:47,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 21:10:47,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 21:10:47,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 21:10:47,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 21:10:47,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 21:10:47,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 21:10:47,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 21:10:47,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 21:10:47,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 21:10:47,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 21:10:47,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 21:10:47,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 21:10:47,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 21:10:47,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 21:10:47,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 21:10:47,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 21:10:47,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 21:10:47,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 21:10:47,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-18 21:10:47,064 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 21:10:47,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 21:10:47,065 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 21:10:47,065 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 21:10:47,066 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 21:10:47,066 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 21:10:47,067 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 21:10:47,067 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 21:10:47,067 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 21:10:47,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 21:10:47,068 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 21:10:47,068 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 21:10:47,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 21:10:47,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 21:10:47,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 21:10:47,069 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 21:10:47,069 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 21:10:47,069 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 21:10:47,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 21:10:47,069 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 21:10:47,069 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-18 21:10:47,070 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-18 21:10:47,070 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 21:10:47,070 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 21:10:47,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 21:10:47,070 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 21:10:47,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 21:10:47,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:10:47,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 21:10:47,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 21:10:47,071 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-18 21:10:47,071 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-18 21:10:47,071 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 21:10:47,071 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-18 21:10:47,071 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 [2021-12-18 21:10:47,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 21:10:47,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 21:10:47,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 21:10:47,357 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 21:10:47,358 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 21:10:47,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2021-12-18 21:10:47,415 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1bbb75fd/1d963cacf4244a0a8251946d425bac38/FLAGa7392a446 [2021-12-18 21:10:47,738 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 21:10:47,739 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2021-12-18 21:10:47,748 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1bbb75fd/1d963cacf4244a0a8251946d425bac38/FLAGa7392a446 [2021-12-18 21:10:48,150 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1bbb75fd/1d963cacf4244a0a8251946d425bac38 [2021-12-18 21:10:48,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 21:10:48,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 21:10:48,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 21:10:48,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 21:10:48,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 21:10:48,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:10:48" (1/1) ... [2021-12-18 21:10:48,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57136a85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:48, skipping insertion in model container [2021-12-18 21:10:48,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:10:48" (1/1) ... [2021-12-18 21:10:48,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 21:10:48,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:10:48,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:10:48,534 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-18 21:10:48,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:10:48,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:10:48,583 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 21:10:48,639 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:10:48,679 INFO L208 MainTranslator]: Completed translation [2021-12-18 21:10:48,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:48 WrapperNode [2021-12-18 21:10:48,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 21:10:48,681 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 21:10:48,681 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 21:10:48,681 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 21:10:48,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:48" (1/1) ... [2021-12-18 21:10:48,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:48" (1/1) ... [2021-12-18 21:10:48,731 INFO L137 Inliner]: procedures = 167, calls = 80, calls flagged for inlining = 24, calls inlined = 6, statements flattened = 99 [2021-12-18 21:10:48,747 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 21:10:48,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 21:10:48,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 21:10:48,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 21:10:48,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:48" (1/1) ... [2021-12-18 21:10:48,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:48" (1/1) ... [2021-12-18 21:10:48,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:48" (1/1) ... [2021-12-18 21:10:48,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:48" (1/1) ... [2021-12-18 21:10:48,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:48" (1/1) ... [2021-12-18 21:10:48,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:48" (1/1) ... [2021-12-18 21:10:48,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:48" (1/1) ... [2021-12-18 21:10:48,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 21:10:48,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 21:10:48,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 21:10:48,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 21:10:48,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:48" (1/1) ... [2021-12-18 21:10:48,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:10:48,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:10:48,816 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 21:10:48,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 21:10:48,842 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-18 21:10:48,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-18 21:10:48,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 21:10:48,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 21:10:48,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 21:10:48,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 21:10:48,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 21:10:48,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 21:10:48,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 21:10:48,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 21:10:48,970 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 21:10:48,971 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 21:10:49,223 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 21:10:49,227 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 21:10:49,227 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-18 21:10:49,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:10:49 BoogieIcfgContainer [2021-12-18 21:10:49,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 21:10:49,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 21:10:49,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 21:10:49,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 21:10:49,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 09:10:48" (1/3) ... [2021-12-18 21:10:49,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df296b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:10:49, skipping insertion in model container [2021-12-18 21:10:49,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:48" (2/3) ... [2021-12-18 21:10:49,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df296b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:10:49, skipping insertion in model container [2021-12-18 21:10:49,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:10:49" (3/3) ... [2021-12-18 21:10:49,236 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test17_2-2.i [2021-12-18 21:10:49,239 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 21:10:49,240 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-12-18 21:10:49,282 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 21:10:49,287 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 21:10:49,287 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-12-18 21:10:49,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 63 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:10:49,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 21:10:49,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:49,301 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:49,302 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:10:49,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:49,310 INFO L85 PathProgramCache]: Analyzing trace with hash 858994893, now seen corresponding path program 1 times [2021-12-18 21:10:49,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:49,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307119397] [2021-12-18 21:10:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:49,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:49,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:49,321 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:10:49,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-18 21:10:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:49,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-18 21:10:49,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:49,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:49,423 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:49,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307119397] [2021-12-18 21:10:49,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307119397] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:49,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:49,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 21:10:49,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843875179] [2021-12-18 21:10:49,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:49,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-18 21:10:49,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:49,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-18 21:10:49,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 21:10:49,452 INFO L87 Difference]: Start difference. First operand has 67 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 63 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:49,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:49,463 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2021-12-18 21:10:49,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 21:10:49,465 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-18 21:10:49,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:49,469 INFO L225 Difference]: With dead ends: 67 [2021-12-18 21:10:49,469 INFO L226 Difference]: Without dead ends: 65 [2021-12-18 21:10:49,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 21:10:49,473 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:49,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:10:49,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-18 21:10:49,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-12-18 21:10:49,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 61 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:10:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-12-18 21:10:49,498 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 14 [2021-12-18 21:10:49,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:49,498 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-12-18 21:10:49,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:49,499 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-12-18 21:10:49,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 21:10:49,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:49,500 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:49,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-18 21:10:49,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:49,708 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:10:49,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:49,709 INFO L85 PathProgramCache]: Analyzing trace with hash 465967883, now seen corresponding path program 1 times [2021-12-18 21:10:49,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:49,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046080478] [2021-12-18 21:10:49,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:49,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:49,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:49,711 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:10:49,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-18 21:10:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:49,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:10:49,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:49,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:49,858 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:49,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046080478] [2021-12-18 21:10:49,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046080478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:49,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:49,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:10:49,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352417993] [2021-12-18 21:10:49,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:49,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:10:49,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:49,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:10:49,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:10:49,861 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:49,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:49,929 INFO L93 Difference]: Finished difference Result 121 states and 137 transitions. [2021-12-18 21:10:49,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:10:49,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-18 21:10:49,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:49,931 INFO L225 Difference]: With dead ends: 121 [2021-12-18 21:10:49,931 INFO L226 Difference]: Without dead ends: 121 [2021-12-18 21:10:49,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:10:49,933 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 57 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:49,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 252 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:10:49,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-18 21:10:49,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 69. [2021-12-18 21:10:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.6) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:10:49,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2021-12-18 21:10:49,940 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 14 [2021-12-18 21:10:49,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:49,941 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2021-12-18 21:10:49,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:49,941 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2021-12-18 21:10:49,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 21:10:49,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:49,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:49,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:50,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:50,148 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:10:50,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:50,149 INFO L85 PathProgramCache]: Analyzing trace with hash 465866789, now seen corresponding path program 1 times [2021-12-18 21:10:50,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:50,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272977739] [2021-12-18 21:10:50,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:50,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:50,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:50,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:10:50,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-18 21:10:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:50,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 21:10:50,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:50,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:50,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:50,309 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:50,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272977739] [2021-12-18 21:10:50,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272977739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:50,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:50,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:10:50,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852135112] [2021-12-18 21:10:50,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:50,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:10:50,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:50,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:10:50,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:10:50,312 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:50,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:50,450 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2021-12-18 21:10:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:10:50,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-18 21:10:50,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:50,452 INFO L225 Difference]: With dead ends: 93 [2021-12-18 21:10:50,452 INFO L226 Difference]: Without dead ends: 93 [2021-12-18 21:10:50,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:10:50,454 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 24 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:50,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 188 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:10:50,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-18 21:10:50,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2021-12-18 21:10:50,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 75 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:10:50,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2021-12-18 21:10:50,460 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 14 [2021-12-18 21:10:50,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:50,460 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2021-12-18 21:10:50,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:50,460 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2021-12-18 21:10:50,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 21:10:50,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:50,461 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:50,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:50,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:50,661 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:10:50,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:50,662 INFO L85 PathProgramCache]: Analyzing trace with hash 465866790, now seen corresponding path program 1 times [2021-12-18 21:10:50,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:50,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593014821] [2021-12-18 21:10:50,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:50,663 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:50,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:50,675 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:10:50,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-18 21:10:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:50,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 21:10:50,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:50,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:50,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:50,978 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:50,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593014821] [2021-12-18 21:10:50,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593014821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:50,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:50,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 21:10:50,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423253351] [2021-12-18 21:10:50,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:50,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 21:10:50,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:50,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 21:10:50,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-18 21:10:50,980 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:51,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:51,302 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2021-12-18 21:10:51,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 21:10:51,302 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-18 21:10:51,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:51,303 INFO L225 Difference]: With dead ends: 117 [2021-12-18 21:10:51,303 INFO L226 Difference]: Without dead ends: 117 [2021-12-18 21:10:51,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-12-18 21:10:51,304 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 221 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:51,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 433 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 204 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2021-12-18 21:10:51,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-18 21:10:51,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2021-12-18 21:10:51,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 76 states have (on average 1.5657894736842106) internal successors, (119), 95 states have internal predecessors, (119), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:10:51,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2021-12-18 21:10:51,312 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 14 [2021-12-18 21:10:51,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:51,312 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2021-12-18 21:10:51,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:51,312 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2021-12-18 21:10:51,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 21:10:51,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:51,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:51,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-18 21:10:51,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:51,533 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:10:51,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:51,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1353471564, now seen corresponding path program 1 times [2021-12-18 21:10:51,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:51,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1494570847] [2021-12-18 21:10:51,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:51,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:51,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:51,540 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:10:51,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-18 21:10:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:51,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:10:51,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:51,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:51,644 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:51,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1494570847] [2021-12-18 21:10:51,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1494570847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:51,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:51,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 21:10:51,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085220305] [2021-12-18 21:10:51,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:51,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:10:51,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:51,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:10:51,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:10:51,646 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:51,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:51,734 INFO L93 Difference]: Finished difference Result 144 states and 174 transitions. [2021-12-18 21:10:51,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 21:10:51,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-18 21:10:51,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:51,736 INFO L225 Difference]: With dead ends: 144 [2021-12-18 21:10:51,736 INFO L226 Difference]: Without dead ends: 142 [2021-12-18 21:10:51,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:10:51,737 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 48 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:51,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 200 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:10:51,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-18 21:10:51,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 100. [2021-12-18 21:10:51,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 76 states have (on average 1.5526315789473684) internal successors, (118), 95 states have internal predecessors, (118), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:10:51,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2021-12-18 21:10:51,743 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 14 [2021-12-18 21:10:51,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:51,743 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2021-12-18 21:10:51,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:51,743 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2021-12-18 21:10:51,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 21:10:51,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:51,746 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:51,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-18 21:10:51,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:51,952 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:10:51,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:51,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1353370470, now seen corresponding path program 1 times [2021-12-18 21:10:51,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:51,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621463796] [2021-12-18 21:10:51,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:51,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:51,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:51,955 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) [2021-12-18 21:10:51,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-18 21:10:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:51,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:10:51,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:52,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:52,036 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:52,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621463796] [2021-12-18 21:10:52,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621463796] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:52,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:52,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:10:52,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671346437] [2021-12-18 21:10:52,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:52,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:10:52,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:52,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:10:52,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:10:52,038 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:52,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:52,064 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2021-12-18 21:10:52,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:10:52,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-18 21:10:52,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:52,065 INFO L225 Difference]: With dead ends: 86 [2021-12-18 21:10:52,066 INFO L226 Difference]: Without dead ends: 84 [2021-12-18 21:10:52,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:10:52,066 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 0 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:52,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 277 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:10:52,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-18 21:10:52,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-12-18 21:10:52,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 80 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:10:52,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2021-12-18 21:10:52,071 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 14 [2021-12-18 21:10:52,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:52,071 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2021-12-18 21:10:52,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:52,072 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2021-12-18 21:10:52,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 21:10:52,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:52,072 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:52,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:52,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:52,278 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:10:52,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:52,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1598186502, now seen corresponding path program 1 times [2021-12-18 21:10:52,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:52,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629018493] [2021-12-18 21:10:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:52,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:52,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:52,281 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:10:52,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-18 21:10:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:52,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 21:10:52,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:52,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:52,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:10:53,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:53,672 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:53,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629018493] [2021-12-18 21:10:53,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629018493] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:10:53,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:10:53,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-12-18 21:10:53,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265661256] [2021-12-18 21:10:53,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:10:53,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 21:10:53,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:53,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 21:10:53,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-18 21:10:53,674 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:10:54,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:54,900 INFO L93 Difference]: Finished difference Result 180 states and 204 transitions. [2021-12-18 21:10:54,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 21:10:54,901 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-12-18 21:10:54,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:54,902 INFO L225 Difference]: With dead ends: 180 [2021-12-18 21:10:54,902 INFO L226 Difference]: Without dead ends: 180 [2021-12-18 21:10:54,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-12-18 21:10:54,903 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 390 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:54,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 675 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 306 Invalid, 0 Unknown, 131 Unchecked, 0.7s Time] [2021-12-18 21:10:54,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-18 21:10:54,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 90. [2021-12-18 21:10:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.537313432835821) internal successors, (103), 86 states have internal predecessors, (103), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:10:54,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2021-12-18 21:10:54,908 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 17 [2021-12-18 21:10:54,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:54,908 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2021-12-18 21:10:54,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:10:54,908 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2021-12-18 21:10:54,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-18 21:10:54,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:54,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:54,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-18 21:10:55,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:55,136 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:10:55,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:55,137 INFO L85 PathProgramCache]: Analyzing trace with hash 740047555, now seen corresponding path program 1 times [2021-12-18 21:10:55,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:55,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967445949] [2021-12-18 21:10:55,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:55,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:55,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:55,139 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:10:55,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-18 21:10:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:55,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:10:55,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:55,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 21:10:55,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:55,238 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:55,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967445949] [2021-12-18 21:10:55,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967445949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:55,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:55,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:10:55,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168244482] [2021-12-18 21:10:55,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:55,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:10:55,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:55,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:10:55,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:10:55,239 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:55,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:55,369 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2021-12-18 21:10:55,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:10:55,370 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-12-18 21:10:55,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:55,370 INFO L225 Difference]: With dead ends: 100 [2021-12-18 21:10:55,370 INFO L226 Difference]: Without dead ends: 100 [2021-12-18 21:10:55,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:10:55,371 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 33 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:55,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 218 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:10:55,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-18 21:10:55,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 91. [2021-12-18 21:10:55,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.5441176470588236) internal successors, (105), 87 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:10:55,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2021-12-18 21:10:55,375 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 22 [2021-12-18 21:10:55,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:55,375 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2021-12-18 21:10:55,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:55,375 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2021-12-18 21:10:55,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-18 21:10:55,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:55,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:55,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-18 21:10:55,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:55,585 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:10:55,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:55,585 INFO L85 PathProgramCache]: Analyzing trace with hash 740047556, now seen corresponding path program 1 times [2021-12-18 21:10:55,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:55,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781212056] [2021-12-18 21:10:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:55,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:55,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:55,587 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:10:55,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-18 21:10:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:55,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-18 21:10:55,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:55,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:55,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:10:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:56,557 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:56,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781212056] [2021-12-18 21:10:56,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781212056] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-18 21:10:56,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 21:10:56,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2021-12-18 21:10:56,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538630658] [2021-12-18 21:10:56,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:56,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:10:56,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:56,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:10:56,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-12-18 21:10:56,558 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:57,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:57,205 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2021-12-18 21:10:57,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 21:10:57,206 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-12-18 21:10:57,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:57,207 INFO L225 Difference]: With dead ends: 108 [2021-12-18 21:10:57,207 INFO L226 Difference]: Without dead ends: 108 [2021-12-18 21:10:57,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-12-18 21:10:57,207 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 138 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:57,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 256 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2021-12-18 21:10:57,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-18 21:10:57,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 91. [2021-12-18 21:10:57,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.5294117647058822) internal successors, (104), 87 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:10:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2021-12-18 21:10:57,212 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 22 [2021-12-18 21:10:57,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:57,212 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2021-12-18 21:10:57,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:57,212 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2021-12-18 21:10:57,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-18 21:10:57,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:57,213 INFO L514 BasicCegarLoop]: 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] [2021-12-18 21:10:57,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:57,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:57,413 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:10:57,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:57,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1466637803, now seen corresponding path program 1 times [2021-12-18 21:10:57,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:57,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771579677] [2021-12-18 21:10:57,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:57,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:57,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:57,415 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) [2021-12-18 21:10:57,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-18 21:10:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:57,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 21:10:57,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:57,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:10:57,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:10:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:57,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:10:57,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-18 21:10:57,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-18 21:10:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:57,607 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:57,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771579677] [2021-12-18 21:10:57,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771579677] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:10:57,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:10:57,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-12-18 21:10:57,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421094912] [2021-12-18 21:10:57,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:10:57,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:10:57,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:57,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:10:57,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:10:57,609 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:57,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:57,826 INFO L93 Difference]: Finished difference Result 159 states and 183 transitions. [2021-12-18 21:10:57,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 21:10:57,827 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-12-18 21:10:57,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:57,828 INFO L225 Difference]: With dead ends: 159 [2021-12-18 21:10:57,828 INFO L226 Difference]: Without dead ends: 159 [2021-12-18 21:10:57,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-12-18 21:10:57,828 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 92 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:57,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 299 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:10:57,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-18 21:10:57,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 108. [2021-12-18 21:10:57,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 84 states have (on average 1.5714285714285714) internal successors, (132), 103 states have internal predecessors, (132), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:10:57,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2021-12-18 21:10:57,833 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 23 [2021-12-18 21:10:57,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:57,833 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2021-12-18 21:10:57,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:57,841 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2021-12-18 21:10:57,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-18 21:10:57,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:57,841 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:57,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:58,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:58,048 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:10:58,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:58,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1828515846, now seen corresponding path program 2 times [2021-12-18 21:10:58,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:58,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966237057] [2021-12-18 21:10:58,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:10:58,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:58,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:58,050 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:10:58,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-18 21:10:58,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:10:58,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:10:58,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-18 21:10:58,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:58,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:58,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:11:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:11:00,792 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:11:00,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966237057] [2021-12-18 21:11:00,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [966237057] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:11:00,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:11:00,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-12-18 21:11:00,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487263326] [2021-12-18 21:11:00,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:11:00,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-18 21:11:00,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:11:00,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-18 21:11:00,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-12-18 21:11:00,793 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 28 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:11:04,429 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 21:11:08,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:11:08,780 INFO L93 Difference]: Finished difference Result 354 states and 426 transitions. [2021-12-18 21:11:08,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-18 21:11:08,780 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-12-18 21:11:08,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:11:08,783 INFO L225 Difference]: With dead ends: 354 [2021-12-18 21:11:08,783 INFO L226 Difference]: Without dead ends: 354 [2021-12-18 21:11:08,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=522, Invalid=1928, Unknown=0, NotChecked=0, Total=2450 [2021-12-18 21:11:08,785 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1036 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 83 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-18 21:11:08,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 1210 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 799 Invalid, 1 Unknown, 183 Unchecked, 5.7s Time] [2021-12-18 21:11:08,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-12-18 21:11:08,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 120. [2021-12-18 21:11:08,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 96 states have (on average 1.5416666666666667) internal successors, (148), 115 states have internal predecessors, (148), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:11:08,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2021-12-18 21:11:08,796 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 23 [2021-12-18 21:11:08,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:11:08,797 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2021-12-18 21:11:08,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:11:08,797 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2021-12-18 21:11:08,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-18 21:11:08,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:11:08,800 INFO L514 BasicCegarLoop]: 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] [2021-12-18 21:11:08,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-18 21:11:09,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:11:09,007 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:11:09,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:11:09,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1778913965, now seen corresponding path program 1 times [2021-12-18 21:11:09,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:11:09,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395867727] [2021-12-18 21:11:09,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:11:09,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:11:09,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:11:09,017 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:11:09,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-18 21:11:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:11:09,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 21:11:09,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 21:11:09,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:11:09,173 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:11:09,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395867727] [2021-12-18 21:11:09,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395867727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:11:09,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:11:09,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:11:09,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930942847] [2021-12-18 21:11:09,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:11:09,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:11:09,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:11:09,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:11:09,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:11:09,174 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:11:09,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:11:09,238 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2021-12-18 21:11:09,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:11:09,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-12-18 21:11:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:11:09,241 INFO L225 Difference]: With dead ends: 119 [2021-12-18 21:11:09,241 INFO L226 Difference]: Without dead ends: 119 [2021-12-18 21:11:09,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:11:09,242 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 60 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:11:09,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 162 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:11:09,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-18 21:11:09,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-12-18 21:11:09,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 96 states have (on average 1.5208333333333333) internal successors, (146), 114 states have internal predecessors, (146), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:11:09,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 154 transitions. [2021-12-18 21:11:09,245 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 154 transitions. Word has length 24 [2021-12-18 21:11:09,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:11:09,245 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 154 transitions. [2021-12-18 21:11:09,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:11:09,245 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 154 transitions. [2021-12-18 21:11:09,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-18 21:11:09,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:11:09,245 INFO L514 BasicCegarLoop]: 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] [2021-12-18 21:11:09,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-18 21:11:09,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:11:09,450 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:11:09,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:11:09,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1778868221, now seen corresponding path program 1 times [2021-12-18 21:11:09,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:11:09,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136496469] [2021-12-18 21:11:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:11:09,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:11:09,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:11:09,452 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) [2021-12-18 21:11:09,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-18 21:11:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:11:09,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 21:11:09,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:09,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:11:09,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:11:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:11:09,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:11:09,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-18 21:11:09,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-12-18 21:11:09,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:11:09,721 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:11:09,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136496469] [2021-12-18 21:11:09,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136496469] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:11:09,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:11:09,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-12-18 21:11:09,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113419348] [2021-12-18 21:11:09,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:11:09,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 21:11:09,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:11:09,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 21:11:09,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-18 21:11:09,722 INFO L87 Difference]: Start difference. First operand 119 states and 154 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 21:11:10,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:11:10,058 INFO L93 Difference]: Finished difference Result 166 states and 191 transitions. [2021-12-18 21:11:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 21:11:10,059 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-18 21:11:10,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:11:10,059 INFO L225 Difference]: With dead ends: 166 [2021-12-18 21:11:10,059 INFO L226 Difference]: Without dead ends: 166 [2021-12-18 21:11:10,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-18 21:11:10,060 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 130 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:11:10,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 360 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:11:10,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-18 21:11:10,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 123. [2021-12-18 21:11:10,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 100 states have (on average 1.5) internal successors, (150), 118 states have internal predecessors, (150), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:11:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 158 transitions. [2021-12-18 21:11:10,063 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 158 transitions. Word has length 24 [2021-12-18 21:11:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:11:10,063 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 158 transitions. [2021-12-18 21:11:10,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 21:11:10,063 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 158 transitions. [2021-12-18 21:11:10,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-18 21:11:10,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:11:10,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:11:10,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-18 21:11:10,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:11:10,270 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:11:10,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:11:10,271 INFO L85 PathProgramCache]: Analyzing trace with hash -878858933, now seen corresponding path program 1 times [2021-12-18 21:11:10,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:11:10,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269812115] [2021-12-18 21:11:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:11:10,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:11:10,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:11:10,272 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:11:10,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-18 21:11:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:11:10,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 21:11:10,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:10,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:11:10,421 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 21:11:10,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2021-12-18 21:11:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 21:11:10,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:11:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 21:11:10,578 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:11:10,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269812115] [2021-12-18 21:11:10,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269812115] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:11:10,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:11:10,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-12-18 21:11:10,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210940035] [2021-12-18 21:11:10,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:11:10,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 21:11:10,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:11:10,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 21:11:10,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:11:10,580 INFO L87 Difference]: Start difference. First operand 123 states and 158 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:11:10,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:11:10,784 INFO L93 Difference]: Finished difference Result 187 states and 237 transitions. [2021-12-18 21:11:10,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:11:10,785 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-12-18 21:11:10,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:11:10,785 INFO L225 Difference]: With dead ends: 187 [2021-12-18 21:11:10,786 INFO L226 Difference]: Without dead ends: 187 [2021-12-18 21:11:10,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-18 21:11:10,786 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 84 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:11:10,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 429 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 193 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2021-12-18 21:11:10,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-18 21:11:10,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 142. [2021-12-18 21:11:10,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 120 states have (on average 1.4666666666666666) internal successors, (176), 135 states have internal predecessors, (176), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-18 21:11:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 187 transitions. [2021-12-18 21:11:10,789 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 187 transitions. Word has length 26 [2021-12-18 21:11:10,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:11:10,789 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 187 transitions. [2021-12-18 21:11:10,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:11:10,790 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 187 transitions. [2021-12-18 21:11:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-18 21:11:10,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:11:10,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:11:10,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-18 21:11:10,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:11:10,991 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:11:10,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:11:10,991 INFO L85 PathProgramCache]: Analyzing trace with hash -878858932, now seen corresponding path program 1 times [2021-12-18 21:11:10,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:11:10,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040336691] [2021-12-18 21:11:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:11:10,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:11:10,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:11:10,993 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:11:10,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-18 21:11:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:11:11,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 21:11:11,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:11,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:11:15,513 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:11:15,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:11:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:11:15,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:11:15,926 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:11:15,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040336691] [2021-12-18 21:11:15,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040336691] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:11:15,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1319630753] [2021-12-18 21:11:15,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:11:15,927 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:11:15,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:11:15,929 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:11:15,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-12-18 21:11:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:11:16,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-18 21:11:16,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:16,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:11:16,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:11:20,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:11:20,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:11:20,669 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:11:20,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:11:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:11:20,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:11:23,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1319630753] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:11:23,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:11:23,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-12-18 21:11:23,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444603135] [2021-12-18 21:11:23,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:11:23,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-18 21:11:23,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:11:23,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-18 21:11:23,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=659, Unknown=5, NotChecked=0, Total=756 [2021-12-18 21:11:23,064 INFO L87 Difference]: Start difference. First operand 142 states and 187 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 21:11:25,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:11:25,484 INFO L93 Difference]: Finished difference Result 149 states and 198 transitions. [2021-12-18 21:11:25,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 21:11:25,484 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2021-12-18 21:11:25,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:11:25,485 INFO L225 Difference]: With dead ends: 149 [2021-12-18 21:11:25,485 INFO L226 Difference]: Without dead ends: 149 [2021-12-18 21:11:25,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=125, Invalid=925, Unknown=6, NotChecked=0, Total=1056 [2021-12-18 21:11:25,486 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 38 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:11:25,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 797 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 294 Invalid, 0 Unknown, 195 Unchecked, 0.3s Time] [2021-12-18 21:11:25,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-18 21:11:25,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2021-12-18 21:11:25,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 125 states have (on average 1.464) internal successors, (183), 140 states have internal predecessors, (183), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-18 21:11:25,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 197 transitions. [2021-12-18 21:11:25,489 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 197 transitions. Word has length 26 [2021-12-18 21:11:25,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:11:25,489 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 197 transitions. [2021-12-18 21:11:25,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 21:11:25,490 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 197 transitions. [2021-12-18 21:11:25,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-18 21:11:25,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:11:25,490 INFO L514 BasicCegarLoop]: 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] [2021-12-18 21:11:25,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-12-18 21:11:25,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-18 21:11:25,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:11:25,891 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:11:25,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:11:25,891 INFO L85 PathProgramCache]: Analyzing trace with hash -850229781, now seen corresponding path program 1 times [2021-12-18 21:11:25,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:11:25,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571216] [2021-12-18 21:11:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:11:25,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:11:25,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:11:25,893 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:11:25,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-18 21:11:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:11:25,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:11:25,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 21:11:26,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:11:26,030 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:11:26,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571216] [2021-12-18 21:11:26,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:11:26,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:11:26,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:11:26,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763999076] [2021-12-18 21:11:26,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:11:26,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:11:26,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:11:26,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:11:26,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:11:26,032 INFO L87 Difference]: Start difference. First operand 148 states and 197 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 21:11:26,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:11:26,048 INFO L93 Difference]: Finished difference Result 161 states and 202 transitions. [2021-12-18 21:11:26,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:11:26,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-12-18 21:11:26,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:11:26,049 INFO L225 Difference]: With dead ends: 161 [2021-12-18 21:11:26,049 INFO L226 Difference]: Without dead ends: 161 [2021-12-18 21:11:26,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:11:26,050 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 37 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:11:26,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 313 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:11:26,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-18 21:11:26,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2021-12-18 21:11:26,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 116 states have (on average 1.4482758620689655) internal successors, (168), 130 states have internal predecessors, (168), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-18 21:11:26,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 179 transitions. [2021-12-18 21:11:26,052 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 179 transitions. Word has length 26 [2021-12-18 21:11:26,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:11:26,053 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 179 transitions. [2021-12-18 21:11:26,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 21:11:26,053 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 179 transitions. [2021-12-18 21:11:26,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 21:11:26,053 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:11:26,053 INFO L514 BasicCegarLoop]: 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] [2021-12-18 21:11:26,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-18 21:11:26,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:11:26,254 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:11:26,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:11:26,254 INFO L85 PathProgramCache]: Analyzing trace with hash -24310932, now seen corresponding path program 1 times [2021-12-18 21:11:26,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:11:26,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433767529] [2021-12-18 21:11:26,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:11:26,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:11:26,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:11:26,255 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:11:26,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-18 21:11:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:11:26,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 21:11:26,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:11:26,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:11:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:11:26,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:11:26,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433767529] [2021-12-18 21:11:26,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433767529] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:11:26,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:11:26,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-12-18 21:11:26,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429859395] [2021-12-18 21:11:26,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:11:26,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 21:11:26,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:11:26,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 21:11:26,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-12-18 21:11:26,551 INFO L87 Difference]: Start difference. First operand 138 states and 179 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:11:26,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:11:26,802 INFO L93 Difference]: Finished difference Result 262 states and 306 transitions. [2021-12-18 21:11:26,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 21:11:26,803 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-12-18 21:11:26,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:11:26,804 INFO L225 Difference]: With dead ends: 262 [2021-12-18 21:11:26,804 INFO L226 Difference]: Without dead ends: 262 [2021-12-18 21:11:26,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-12-18 21:11:26,804 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 767 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:11:26,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [767 Valid, 374 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:11:26,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-18 21:11:26,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 121. [2021-12-18 21:11:26,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 99 states have (on average 1.4343434343434343) internal successors, (142), 113 states have internal predecessors, (142), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-18 21:11:26,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions. [2021-12-18 21:11:26,807 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 27 [2021-12-18 21:11:26,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:11:26,808 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 153 transitions. [2021-12-18 21:11:26,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:11:26,808 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions. [2021-12-18 21:11:26,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-18 21:11:26,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:11:26,808 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:11:26,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-18 21:11:27,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:11:27,015 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:11:27,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:11:27,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1525074233, now seen corresponding path program 1 times [2021-12-18 21:11:27,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:11:27,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648166191] [2021-12-18 21:11:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:11:27,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:11:27,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:11:27,019 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) [2021-12-18 21:11:27,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-18 21:11:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:11:27,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:11:27,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 21:11:27,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:11:27,116 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:11:27,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648166191] [2021-12-18 21:11:27,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648166191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:11:27,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:11:27,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:11:27,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228874930] [2021-12-18 21:11:27,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:11:27,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:11:27,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:11:27,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:11:27,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:11:27,118 INFO L87 Difference]: Start difference. First operand 121 states and 153 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 21:11:27,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:11:27,148 INFO L93 Difference]: Finished difference Result 141 states and 170 transitions. [2021-12-18 21:11:27,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:11:27,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-12-18 21:11:27,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:11:27,149 INFO L225 Difference]: With dead ends: 141 [2021-12-18 21:11:27,149 INFO L226 Difference]: Without dead ends: 141 [2021-12-18 21:11:27,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:11:27,150 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 28 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:11:27,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 261 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:11:27,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-18 21:11:27,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 118. [2021-12-18 21:11:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 96 states have (on average 1.4166666666666667) internal successors, (136), 111 states have internal predecessors, (136), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-18 21:11:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 147 transitions. [2021-12-18 21:11:27,153 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 147 transitions. Word has length 28 [2021-12-18 21:11:27,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:11:27,153 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 147 transitions. [2021-12-18 21:11:27,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 21:11:27,153 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 147 transitions. [2021-12-18 21:11:27,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-18 21:11:27,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:11:27,154 INFO L514 BasicCegarLoop]: 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] [2021-12-18 21:11:27,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-18 21:11:27,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:11:27,360 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:11:27,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:11:27,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1027082728, now seen corresponding path program 1 times [2021-12-18 21:11:27,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:11:27,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527371394] [2021-12-18 21:11:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:11:27,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:11:27,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:11:27,362 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:11:27,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-18 21:11:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:11:27,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 21:11:27,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 21:11:27,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:11:27,471 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:11:27,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527371394] [2021-12-18 21:11:27,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527371394] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:11:27,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:11:27,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:11:27,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397119566] [2021-12-18 21:11:27,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:11:27,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:11:27,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:11:27,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:11:27,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:11:27,473 INFO L87 Difference]: Start difference. First operand 118 states and 147 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:11:27,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:11:27,524 INFO L93 Difference]: Finished difference Result 133 states and 153 transitions. [2021-12-18 21:11:27,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 21:11:27,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-18 21:11:27,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:11:27,525 INFO L225 Difference]: With dead ends: 133 [2021-12-18 21:11:27,525 INFO L226 Difference]: Without dead ends: 133 [2021-12-18 21:11:27,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:11:27,526 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 50 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:11:27,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 201 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:11:27,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-18 21:11:27,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 108. [2021-12-18 21:11:27,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 86 states have (on average 1.3604651162790697) internal successors, (117), 101 states have internal predecessors, (117), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-18 21:11:27,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2021-12-18 21:11:27,528 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 28 [2021-12-18 21:11:27,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:11:27,529 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2021-12-18 21:11:27,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:11:27,529 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2021-12-18 21:11:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 21:11:27,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:11:27,529 INFO L514 BasicCegarLoop]: 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] [2021-12-18 21:11:27,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-18 21:11:27,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:11:27,735 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:11:27,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:11:27,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1822208300, now seen corresponding path program 2 times [2021-12-18 21:11:27,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:11:27,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167771831] [2021-12-18 21:11:27,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:11:27,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:11:27,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:11:27,746 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) [2021-12-18 21:11:27,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-18 21:11:27,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:11:27,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:11:27,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 21:11:27,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:27,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:11:32,350 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:11:32,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-12-18 21:11:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:11:32,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:11:33,018 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:11:33,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167771831] [2021-12-18 21:11:33,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167771831] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:11:33,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [160058755] [2021-12-18 21:11:33,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:11:33,018 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:11:33,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:11:33,019 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:11:33,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-12-18 21:11:33,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:11:33,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:11:33,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-18 21:11:33,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:33,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:11:33,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:11:35,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:11:35,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:11:35,986 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:11:35,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:11:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:11:36,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:11:38,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [160058755] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:11:38,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:11:38,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 29 [2021-12-18 21:11:38,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634544904] [2021-12-18 21:11:38,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:11:38,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 21:11:38,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:11:38,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 21:11:38,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=929, Unknown=4, NotChecked=0, Total=1056 [2021-12-18 21:11:38,436 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 27 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 21:11:41,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:11:41,186 INFO L93 Difference]: Finished difference Result 186 states and 210 transitions. [2021-12-18 21:11:41,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 21:11:41,187 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 27 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2021-12-18 21:11:41,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:11:41,188 INFO L225 Difference]: With dead ends: 186 [2021-12-18 21:11:41,188 INFO L226 Difference]: Without dead ends: 186 [2021-12-18 21:11:41,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=162, Invalid=1315, Unknown=5, NotChecked=0, Total=1482 [2021-12-18 21:11:41,189 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 153 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1391 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:11:41,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1391 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 598 Invalid, 0 Unknown, 367 Unchecked, 0.5s Time] [2021-12-18 21:11:41,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-18 21:11:41,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 132. [2021-12-18 21:11:41,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 109 states have (on average 1.3669724770642202) internal successors, (149), 124 states have internal predecessors, (149), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-18 21:11:41,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 163 transitions. [2021-12-18 21:11:41,191 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 163 transitions. Word has length 29 [2021-12-18 21:11:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:11:41,192 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 163 transitions. [2021-12-18 21:11:41,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 27 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 21:11:41,192 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 163 transitions. [2021-12-18 21:11:41,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-18 21:11:41,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:11:41,192 INFO L514 BasicCegarLoop]: 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, 1, 1, 1] [2021-12-18 21:11:41,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-18 21:11:41,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-12-18 21:11:41,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:11:41,604 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:11:41,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:11:41,604 INFO L85 PathProgramCache]: Analyzing trace with hash -475836742, now seen corresponding path program 1 times [2021-12-18 21:11:41,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:11:41,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607095064] [2021-12-18 21:11:41,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:11:41,605 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:11:41,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:11:41,606 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) [2021-12-18 21:11:41,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-18 21:11:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:11:41,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 21:11:41,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:41,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:11:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 21:11:41,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:11:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 21:11:41,830 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:11:41,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [607095064] [2021-12-18 21:11:41,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [607095064] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:11:41,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:11:41,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-12-18 21:11:41,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129139389] [2021-12-18 21:11:41,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:11:41,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:11:41,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:11:41,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:11:41,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:11:41,831 INFO L87 Difference]: Start difference. First operand 132 states and 163 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:11:41,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:11:41,962 INFO L93 Difference]: Finished difference Result 138 states and 165 transitions. [2021-12-18 21:11:41,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:11:41,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-12-18 21:11:41,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:11:41,964 INFO L225 Difference]: With dead ends: 138 [2021-12-18 21:11:41,964 INFO L226 Difference]: Without dead ends: 136 [2021-12-18 21:11:41,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:11:41,964 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 26 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:11:41,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 274 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2021-12-18 21:11:41,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-18 21:11:41,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2021-12-18 21:11:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 111 states have (on average 1.3423423423423424) internal successors, (149), 125 states have internal predecessors, (149), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-18 21:11:41,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 163 transitions. [2021-12-18 21:11:41,967 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 163 transitions. Word has length 31 [2021-12-18 21:11:41,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:11:41,967 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 163 transitions. [2021-12-18 21:11:41,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:11:41,967 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 163 transitions. [2021-12-18 21:11:41,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-18 21:11:41,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:11:41,968 INFO L514 BasicCegarLoop]: 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, 1, 1, 1] [2021-12-18 21:11:41,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-18 21:11:42,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:11:42,168 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:11:42,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:11:42,169 INFO L85 PathProgramCache]: Analyzing trace with hash -475836741, now seen corresponding path program 1 times [2021-12-18 21:11:42,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:11:42,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467715254] [2021-12-18 21:11:42,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:11:42,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:11:42,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:11:42,170 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:11:42,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-18 21:11:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:11:42,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 21:11:42,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:42,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:11:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:11:42,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:11:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:11:43,537 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:11:43,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467715254] [2021-12-18 21:11:43,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467715254] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:11:43,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:11:43,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2021-12-18 21:11:43,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209306917] [2021-12-18 21:11:43,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:11:43,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-18 21:11:43,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:11:43,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-18 21:11:43,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-12-18 21:11:43,539 INFO L87 Difference]: Start difference. First operand 134 states and 163 transitions. Second operand has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:11:44,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:11:44,095 INFO L93 Difference]: Finished difference Result 171 states and 203 transitions. [2021-12-18 21:11:44,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 21:11:44,096 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2021-12-18 21:11:44,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:11:44,096 INFO L225 Difference]: With dead ends: 171 [2021-12-18 21:11:44,097 INFO L226 Difference]: Without dead ends: 171 [2021-12-18 21:11:44,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-12-18 21:11:44,097 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 64 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:11:44,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 659 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 181 Invalid, 0 Unknown, 113 Unchecked, 0.4s Time] [2021-12-18 21:11:44,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-18 21:11:44,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 134. [2021-12-18 21:11:44,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 111 states have (on average 1.3243243243243243) internal successors, (147), 125 states have internal predecessors, (147), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-18 21:11:44,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 161 transitions. [2021-12-18 21:11:44,100 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 161 transitions. Word has length 31 [2021-12-18 21:11:44,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:11:44,100 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 161 transitions. [2021-12-18 21:11:44,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:11:44,101 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 161 transitions. [2021-12-18 21:11:44,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 21:11:44,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:11:44,101 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:11:44,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-18 21:11:44,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:11:44,301 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:11:44,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:11:44,302 INFO L85 PathProgramCache]: Analyzing trace with hash 818465468, now seen corresponding path program 1 times [2021-12-18 21:11:44,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:11:44,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185522426] [2021-12-18 21:11:44,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:11:44,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:11:44,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:11:44,304 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) [2021-12-18 21:11:44,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-18 21:11:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:11:44,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 21:11:44,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:44,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 21:11:44,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:11:44,430 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 21:11:44,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2021-12-18 21:11:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 21:11:44,460 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:11:44,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185522426] [2021-12-18 21:11:44,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185522426] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:11:44,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:11:44,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-12-18 21:11:44,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921646203] [2021-12-18 21:11:44,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:11:44,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:11:44,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:11:44,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:11:44,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:11:44,461 INFO L87 Difference]: Start difference. First operand 134 states and 161 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:11:44,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:11:44,596 INFO L93 Difference]: Finished difference Result 153 states and 182 transitions. [2021-12-18 21:11:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:11:44,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2021-12-18 21:11:44,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:11:44,598 INFO L225 Difference]: With dead ends: 153 [2021-12-18 21:11:44,598 INFO L226 Difference]: Without dead ends: 153 [2021-12-18 21:11:44,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:11:44,598 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 83 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:11:44,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 150 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:11:44,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-18 21:11:44,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 139. [2021-12-18 21:11:44,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 116 states have (on average 1.3362068965517242) internal successors, (155), 130 states have internal predecessors, (155), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-18 21:11:44,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 169 transitions. [2021-12-18 21:11:44,601 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 169 transitions. Word has length 32 [2021-12-18 21:11:44,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:11:44,601 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 169 transitions. [2021-12-18 21:11:44,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:11:44,602 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 169 transitions. [2021-12-18 21:11:44,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 21:11:44,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:11:44,602 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:11:44,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-18 21:11:44,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:11:44,803 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:11:44,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:11:44,803 INFO L85 PathProgramCache]: Analyzing trace with hash 818465469, now seen corresponding path program 1 times [2021-12-18 21:11:44,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:11:44,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461793216] [2021-12-18 21:11:44,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:11:44,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:11:44,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:11:44,804 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:11:44,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-18 21:11:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:11:44,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 21:11:44,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 21:11:45,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:11:45,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:11:45,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2021-12-18 21:11:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 21:11:45,497 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:11:45,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461793216] [2021-12-18 21:11:45,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461793216] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:11:45,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:11:45,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-18 21:11:45,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156378025] [2021-12-18 21:11:45,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:11:45,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 21:11:45,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:11:45,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 21:11:45,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-18 21:11:45,498 INFO L87 Difference]: Start difference. First operand 139 states and 169 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 21:11:47,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:11:47,055 INFO L93 Difference]: Finished difference Result 290 states and 327 transitions. [2021-12-18 21:11:47,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 21:11:47,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-12-18 21:11:47,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:11:47,057 INFO L225 Difference]: With dead ends: 290 [2021-12-18 21:11:47,057 INFO L226 Difference]: Without dead ends: 290 [2021-12-18 21:11:47,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-12-18 21:11:47,057 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 460 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 21:11:47,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 496 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 21:11:47,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-12-18 21:11:47,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 141. [2021-12-18 21:11:47,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 119 states have (on average 1.361344537815126) internal successors, (162), 130 states have internal predecessors, (162), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-18 21:11:47,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 176 transitions. [2021-12-18 21:11:47,060 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 176 transitions. Word has length 32 [2021-12-18 21:11:47,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:11:47,061 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 176 transitions. [2021-12-18 21:11:47,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 21:11:47,061 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 176 transitions. [2021-12-18 21:11:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 21:11:47,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:11:47,061 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:11:47,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-18 21:11:47,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:11:47,268 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:11:47,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:11:47,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1191141044, now seen corresponding path program 3 times [2021-12-18 21:11:47,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:11:47,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928193623] [2021-12-18 21:11:47,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:11:47,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:11:47,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:11:47,269 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) [2021-12-18 21:11:47,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-18 21:11:47,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-18 21:11:47,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:11:47,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-18 21:11:47,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:47,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:11:47,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:11:47,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:11:47,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:11:47,757 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:11:47,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:11:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:11:47,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:11:48,231 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:11:48,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928193623] [2021-12-18 21:11:48,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928193623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:11:48,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [801301072] [2021-12-18 21:11:48,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:11:48,232 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:11:48,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:11:48,233 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:11:48,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-12-18 21:11:48,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-18 21:11:48,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:11:48,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-18 21:11:48,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:48,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:11:48,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:11:50,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:11:50,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:11:50,655 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:11:50,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:11:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:11:50,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:11:50,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [801301072] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:11:50,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:11:50,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-12-18 21:11:50,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298154610] [2021-12-18 21:11:50,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:11:50,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 21:11:50,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:11:50,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 21:11:50,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-12-18 21:11:50,995 INFO L87 Difference]: Start difference. First operand 141 states and 176 transitions. Second operand has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:11:53,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:11:53,241 INFO L93 Difference]: Finished difference Result 141 states and 175 transitions. [2021-12-18 21:11:53,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 21:11:53,242 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2021-12-18 21:11:53,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:11:53,243 INFO L225 Difference]: With dead ends: 141 [2021-12-18 21:11:53,243 INFO L226 Difference]: Without dead ends: 141 [2021-12-18 21:11:53,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=51, Invalid=290, Unknown=1, NotChecked=0, Total=342 [2021-12-18 21:11:53,243 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 8 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:11:53,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 519 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 105 Unchecked, 0.1s Time] [2021-12-18 21:11:53,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-18 21:11:53,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 135. [2021-12-18 21:11:53,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 114 states have (on average 1.368421052631579) internal successors, (156), 125 states have internal predecessors, (156), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-18 21:11:53,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 167 transitions. [2021-12-18 21:11:53,246 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 167 transitions. Word has length 32 [2021-12-18 21:11:53,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:11:53,246 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 167 transitions. [2021-12-18 21:11:53,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:11:53,246 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 167 transitions. [2021-12-18 21:11:53,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-18 21:11:53,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:11:53,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:11:53,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-12-18 21:11:53,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-12-18 21:11:53,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:11:53,652 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:11:53,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:11:53,652 INFO L85 PathProgramCache]: Analyzing trace with hash -397374190, now seen corresponding path program 1 times [2021-12-18 21:11:53,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:11:53,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422535491] [2021-12-18 21:11:53,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:11:53,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:11:53,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:11:53,654 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) [2021-12-18 21:11:53,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-18 21:11:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:11:53,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 21:11:53,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:53,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:11:53,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:11:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 21:11:53,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:11:53,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-18 21:11:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 21:11:54,098 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:11:54,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422535491] [2021-12-18 21:11:54,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422535491] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:11:54,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:11:54,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-12-18 21:11:54,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121662298] [2021-12-18 21:11:54,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:11:54,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 21:11:54,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:11:54,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 21:11:54,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-18 21:11:54,099 INFO L87 Difference]: Start difference. First operand 135 states and 167 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:11:54,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:11:54,479 INFO L93 Difference]: Finished difference Result 212 states and 238 transitions. [2021-12-18 21:11:54,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 21:11:54,481 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2021-12-18 21:11:54,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:11:54,482 INFO L225 Difference]: With dead ends: 212 [2021-12-18 21:11:54,482 INFO L226 Difference]: Without dead ends: 212 [2021-12-18 21:11:54,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-12-18 21:11:54,482 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 150 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:11:54,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 467 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:11:54,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-18 21:11:54,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2021-12-18 21:11:54,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 123 states have (on average 1.3739837398373984) internal successors, (169), 134 states have internal predecessors, (169), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-18 21:11:54,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 180 transitions. [2021-12-18 21:11:54,486 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 180 transitions. Word has length 33 [2021-12-18 21:11:54,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:11:54,486 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 180 transitions. [2021-12-18 21:11:54,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:11:54,486 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 180 transitions. [2021-12-18 21:11:54,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-18 21:11:54,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:11:54,487 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:11:54,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-12-18 21:11:54,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:11:54,688 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:11:54,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:11:54,689 INFO L85 PathProgramCache]: Analyzing trace with hash 566302140, now seen corresponding path program 1 times [2021-12-18 21:11:54,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:11:54,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195214058] [2021-12-18 21:11:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:11:54,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:11:54,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:11:54,690 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:11:54,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-18 21:11:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:11:54,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 21:11:54,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:54,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:11:55,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:11:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 21:11:55,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:11:55,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-18 21:11:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 21:11:55,427 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:11:55,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195214058] [2021-12-18 21:11:55,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195214058] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:11:55,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:11:55,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2021-12-18 21:11:55,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049909233] [2021-12-18 21:11:55,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:11:55,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 21:11:55,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:11:55,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 21:11:55,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-12-18 21:11:55,428 INFO L87 Difference]: Start difference. First operand 144 states and 180 transitions. Second operand has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:11:55,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:11:55,570 INFO L93 Difference]: Finished difference Result 159 states and 195 transitions. [2021-12-18 21:11:55,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 21:11:55,571 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-12-18 21:11:55,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:11:55,572 INFO L225 Difference]: With dead ends: 159 [2021-12-18 21:11:55,572 INFO L226 Difference]: Without dead ends: 159 [2021-12-18 21:11:55,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-12-18 21:11:55,572 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 31 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:11:55,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 657 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 234 Unchecked, 0.1s Time] [2021-12-18 21:11:55,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-18 21:11:55,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2021-12-18 21:11:55,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 132 states have (on average 1.3636363636363635) internal successors, (180), 144 states have internal predecessors, (180), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-18 21:11:55,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 191 transitions. [2021-12-18 21:11:55,575 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 191 transitions. Word has length 34 [2021-12-18 21:11:55,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:11:55,575 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 191 transitions. [2021-12-18 21:11:55,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:11:55,575 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 191 transitions. [2021-12-18 21:11:55,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-18 21:11:55,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:11:55,576 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:11:55,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-12-18 21:11:55,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:11:55,776 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:11:55,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:11:55,777 INFO L85 PathProgramCache]: Analyzing trace with hash 375497300, now seen corresponding path program 1 times [2021-12-18 21:11:55,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:11:55,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236147903] [2021-12-18 21:11:55,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:11:55,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:11:55,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:11:55,782 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:11:55,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-18 21:11:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:11:55,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 21:11:55,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:55,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:11:55,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:11:56,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-12-18 21:11:56,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 21:11:56,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:11:56,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-12-18 21:11:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 21:11:56,273 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:11:56,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236147903] [2021-12-18 21:11:56,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236147903] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:11:56,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:11:56,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-12-18 21:11:56,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187518661] [2021-12-18 21:11:56,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:11:56,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 21:11:56,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:11:56,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 21:11:56,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-18 21:11:56,274 INFO L87 Difference]: Start difference. First operand 155 states and 191 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:11:56,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:11:56,605 INFO L93 Difference]: Finished difference Result 183 states and 219 transitions. [2021-12-18 21:11:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 21:11:56,606 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2021-12-18 21:11:56,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:11:56,607 INFO L225 Difference]: With dead ends: 183 [2021-12-18 21:11:56,607 INFO L226 Difference]: Without dead ends: 183 [2021-12-18 21:11:56,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-12-18 21:11:56,607 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 46 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:11:56,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 417 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 276 Invalid, 0 Unknown, 131 Unchecked, 0.3s Time] [2021-12-18 21:11:56,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-18 21:11:56,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 150. [2021-12-18 21:11:56,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 127 states have (on average 1.3700787401574803) internal successors, (174), 139 states have internal predecessors, (174), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-18 21:11:56,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 185 transitions. [2021-12-18 21:11:56,610 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 185 transitions. Word has length 35 [2021-12-18 21:11:56,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:11:56,611 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 185 transitions. [2021-12-18 21:11:56,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:11:56,611 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 185 transitions. [2021-12-18 21:11:56,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-18 21:11:56,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:11:56,611 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:11:56,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-12-18 21:11:56,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:11:56,819 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:11:56,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:11:56,819 INFO L85 PathProgramCache]: Analyzing trace with hash -2027972411, now seen corresponding path program 1 times [2021-12-18 21:11:56,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:11:56,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198396231] [2021-12-18 21:11:56,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:11:56,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:11:56,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:11:56,821 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:11:56,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-18 21:11:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:11:56,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 21:11:56,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:11:57,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:11:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:11:57,323 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:11:57,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198396231] [2021-12-18 21:11:57,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198396231] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:11:57,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:11:57,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-12-18 21:11:57,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120535843] [2021-12-18 21:11:57,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:11:57,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 21:11:57,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:11:57,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 21:11:57,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-18 21:11:57,324 INFO L87 Difference]: Start difference. First operand 150 states and 185 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:11:57,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:11:57,692 INFO L93 Difference]: Finished difference Result 254 states and 296 transitions. [2021-12-18 21:11:57,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 21:11:57,693 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 36 [2021-12-18 21:11:57,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:11:57,693 INFO L225 Difference]: With dead ends: 254 [2021-12-18 21:11:57,693 INFO L226 Difference]: Without dead ends: 254 [2021-12-18 21:11:57,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-12-18 21:11:57,694 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 551 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:11:57,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 541 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:11:57,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-12-18 21:11:57,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 158. [2021-12-18 21:11:57,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 134 states have (on average 1.3507462686567164) internal successors, (181), 146 states have internal predecessors, (181), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-18 21:11:57,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 195 transitions. [2021-12-18 21:11:57,697 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 195 transitions. Word has length 36 [2021-12-18 21:11:57,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:11:57,697 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 195 transitions. [2021-12-18 21:11:57,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:11:57,697 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 195 transitions. [2021-12-18 21:11:57,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-18 21:11:57,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:11:57,698 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:11:57,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-12-18 21:11:57,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:11:57,898 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:11:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:11:57,898 INFO L85 PathProgramCache]: Analyzing trace with hash -185148971, now seen corresponding path program 1 times [2021-12-18 21:11:57,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:11:57,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016251448] [2021-12-18 21:11:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:11:57,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:11:57,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:11:57,900 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:11:57,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-18 21:11:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:11:57,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 21:11:57,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:11:58,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:11:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:11:58,194 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:11:58,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016251448] [2021-12-18 21:11:58,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016251448] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:11:58,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:11:58,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-12-18 21:11:58,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328844466] [2021-12-18 21:11:58,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:11:58,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 21:11:58,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:11:58,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 21:11:58,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-12-18 21:11:58,195 INFO L87 Difference]: Start difference. First operand 158 states and 195 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:11:58,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:11:58,442 INFO L93 Difference]: Finished difference Result 187 states and 219 transitions. [2021-12-18 21:11:58,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 21:11:58,443 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-12-18 21:11:58,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:11:58,444 INFO L225 Difference]: With dead ends: 187 [2021-12-18 21:11:58,444 INFO L226 Difference]: Without dead ends: 187 [2021-12-18 21:11:58,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-12-18 21:11:58,444 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 290 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:11:58,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 270 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:11:58,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-18 21:11:58,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 155. [2021-12-18 21:11:58,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 131 states have (on average 1.3206106870229009) internal successors, (173), 143 states have internal predecessors, (173), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-18 21:11:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 187 transitions. [2021-12-18 21:11:58,447 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 187 transitions. Word has length 36 [2021-12-18 21:11:58,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:11:58,447 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 187 transitions. [2021-12-18 21:11:58,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:11:58,448 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 187 transitions. [2021-12-18 21:11:58,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-18 21:11:58,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:11:58,448 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:11:58,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-12-18 21:11:58,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:11:58,656 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:11:58,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:11:58,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1645803514, now seen corresponding path program 3 times [2021-12-18 21:11:58,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:11:58,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024498277] [2021-12-18 21:11:58,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:11:58,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:11:58,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:11:58,667 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) [2021-12-18 21:11:58,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-18 21:11:58,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-18 21:11:58,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:11:58,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 21:11:58,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:11:58,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:11:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:11:59,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:12:01,611 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:01,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024498277] [2021-12-18 21:12:01,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024498277] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:12:01,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:12:01,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2021-12-18 21:12:01,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386243504] [2021-12-18 21:12:01,612 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:12:01,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-18 21:12:01,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:01,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-18 21:12:01,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-12-18 21:12:01,613 INFO L87 Difference]: Start difference. First operand 155 states and 187 transitions. Second operand has 32 states, 29 states have (on average 2.206896551724138) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:12:13,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:13,918 INFO L93 Difference]: Finished difference Result 313 states and 398 transitions. [2021-12-18 21:12:13,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-18 21:12:13,918 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.206896551724138) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-12-18 21:12:13,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:13,919 INFO L225 Difference]: With dead ends: 313 [2021-12-18 21:12:13,919 INFO L226 Difference]: Without dead ends: 313 [2021-12-18 21:12:13,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=1322, Invalid=4530, Unknown=0, NotChecked=0, Total=5852 [2021-12-18 21:12:13,921 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 443 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:13,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 1194 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1105 Invalid, 0 Unknown, 259 Unchecked, 2.6s Time] [2021-12-18 21:12:13,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-12-18 21:12:13,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 179. [2021-12-18 21:12:13,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 155 states have (on average 1.3225806451612903) internal successors, (205), 167 states have internal predecessors, (205), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-18 21:12:13,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 219 transitions. [2021-12-18 21:12:13,926 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 219 transitions. Word has length 35 [2021-12-18 21:12:13,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:13,926 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 219 transitions. [2021-12-18 21:12:13,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.206896551724138) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:12:13,926 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 219 transitions. [2021-12-18 21:12:13,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-18 21:12:13,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:13,927 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:12:13,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-12-18 21:12:14,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:12:14,134 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:12:14,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:14,134 INFO L85 PathProgramCache]: Analyzing trace with hash 2145816479, now seen corresponding path program 1 times [2021-12-18 21:12:14,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:14,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382281681] [2021-12-18 21:12:14,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:14,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:14,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:14,136 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:12:14,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-18 21:12:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:14,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 21:12:14,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:12:14,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:12:14,577 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:14,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382281681] [2021-12-18 21:12:14,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382281681] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:12:14,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:12:14,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-12-18 21:12:14,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720719951] [2021-12-18 21:12:14,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:12:14,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 21:12:14,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:14,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 21:12:14,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-18 21:12:14,578 INFO L87 Difference]: Start difference. First operand 179 states and 219 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:12:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:14,917 INFO L93 Difference]: Finished difference Result 201 states and 240 transitions. [2021-12-18 21:12:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 21:12:14,918 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2021-12-18 21:12:14,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:14,918 INFO L225 Difference]: With dead ends: 201 [2021-12-18 21:12:14,918 INFO L226 Difference]: Without dead ends: 201 [2021-12-18 21:12:14,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-12-18 21:12:14,919 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 399 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:14,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 365 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:12:14,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-18 21:12:14,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 193. [2021-12-18 21:12:14,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 169 states have (on average 1.2958579881656804) internal successors, (219), 180 states have internal predecessors, (219), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-18 21:12:14,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 233 transitions. [2021-12-18 21:12:14,922 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 233 transitions. Word has length 37 [2021-12-18 21:12:14,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:14,922 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 233 transitions. [2021-12-18 21:12:14,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:12:14,922 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 233 transitions. [2021-12-18 21:12:14,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-18 21:12:14,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:14,922 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:12:14,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-12-18 21:12:15,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:12:15,123 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:12:15,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:15,123 INFO L85 PathProgramCache]: Analyzing trace with hash 731071653, now seen corresponding path program 2 times [2021-12-18 21:12:15,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:15,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545664487] [2021-12-18 21:12:15,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:12:15,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:15,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:15,125 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:12:15,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-18 21:12:15,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:12:15,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:12:15,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-18 21:12:15,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:15,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:12:15,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:12:15,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:12:15,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-18 21:12:15,832 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:12:15,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:12:16,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:12:16,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-18 21:12:16,144 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:12:16,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:12:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:12:16,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:18,720 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:18,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545664487] [2021-12-18 21:12:18,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545664487] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:12:18,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [867650893] [2021-12-18 21:12:18,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:12:18,720 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:12:18,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:12:18,721 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:12:18,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-12-18 21:12:18,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:12:18,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:12:18,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-18 21:12:18,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:18,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:12:18,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:12:19,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:12:19,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-18 21:12:19,257 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:12:19,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:12:21,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:12:21,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-18 21:12:21,506 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:12:21,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:12:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:12:21,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:21,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [867650893] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:12:21,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:12:21,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-12-18 21:12:21,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404353345] [2021-12-18 21:12:21,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:12:21,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 21:12:21,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:21,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 21:12:21,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=394, Unknown=1, NotChecked=0, Total=462 [2021-12-18 21:12:21,926 INFO L87 Difference]: Start difference. First operand 193 states and 233 transitions. Second operand has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:12:22,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:22,385 INFO L93 Difference]: Finished difference Result 243 states and 288 transitions. [2021-12-18 21:12:22,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 21:12:22,385 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2021-12-18 21:12:22,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:22,386 INFO L225 Difference]: With dead ends: 243 [2021-12-18 21:12:22,386 INFO L226 Difference]: Without dead ends: 243 [2021-12-18 21:12:22,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=93, Invalid=608, Unknown=1, NotChecked=0, Total=702 [2021-12-18 21:12:22,387 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 139 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:22,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 607 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 259 Invalid, 0 Unknown, 247 Unchecked, 0.3s Time] [2021-12-18 21:12:22,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-18 21:12:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 205. [2021-12-18 21:12:22,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 179 states have (on average 1.2849162011173185) internal successors, (230), 190 states have internal predecessors, (230), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2021-12-18 21:12:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 250 transitions. [2021-12-18 21:12:22,392 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 250 transitions. Word has length 39 [2021-12-18 21:12:22,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:22,392 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 250 transitions. [2021-12-18 21:12:22,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:12:22,393 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 250 transitions. [2021-12-18 21:12:22,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 21:12:22,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:22,393 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:12:22,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-12-18 21:12:22,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-12-18 21:12:22,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:12:22,794 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:12:22,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:22,794 INFO L85 PathProgramCache]: Analyzing trace with hash -275846323, now seen corresponding path program 1 times [2021-12-18 21:12:22,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:22,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383481799] [2021-12-18 21:12:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:22,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:22,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:22,796 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:12:22,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-12-18 21:12:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:22,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 21:12:22,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:22,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:12:22,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:12:22,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-18 21:12:23,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:12:23,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-18 21:12:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:12:23,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:23,311 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:23,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383481799] [2021-12-18 21:12:23,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383481799] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:12:23,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [954707425] [2021-12-18 21:12:23,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:23,311 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:12:23,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:12:23,313 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:12:23,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-12-18 21:12:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:23,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 21:12:23,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:23,450 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:12:23,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:12:23,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-18 21:12:23,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:12:23,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-18 21:12:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:12:23,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:23,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [954707425] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:12:23,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:12:23,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-12-18 21:12:23,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419064199] [2021-12-18 21:12:23,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:12:23,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-18 21:12:23,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:23,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-18 21:12:23,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-12-18 21:12:23,827 INFO L87 Difference]: Start difference. First operand 205 states and 250 transitions. Second operand has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 21:12:24,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:24,148 INFO L93 Difference]: Finished difference Result 234 states and 280 transitions. [2021-12-18 21:12:24,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 21:12:24,149 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2021-12-18 21:12:24,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:24,150 INFO L225 Difference]: With dead ends: 234 [2021-12-18 21:12:24,150 INFO L226 Difference]: Without dead ends: 234 [2021-12-18 21:12:24,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-12-18 21:12:24,150 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 80 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:24,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 544 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 351 Invalid, 0 Unknown, 94 Unchecked, 0.3s Time] [2021-12-18 21:12:24,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-18 21:12:24,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 225. [2021-12-18 21:12:24,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 199 states have (on average 1.2613065326633166) internal successors, (251), 210 states have internal predecessors, (251), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2021-12-18 21:12:24,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 271 transitions. [2021-12-18 21:12:24,154 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 271 transitions. Word has length 40 [2021-12-18 21:12:24,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:24,154 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 271 transitions. [2021-12-18 21:12:24,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 21:12:24,154 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 271 transitions. [2021-12-18 21:12:24,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 21:12:24,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:24,155 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2021-12-18 21:12:24,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-12-18 21:12:24,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-12-18 21:12:24,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:12:24,564 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:12:24,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:24,565 INFO L85 PathProgramCache]: Analyzing trace with hash -72017103, now seen corresponding path program 1 times [2021-12-18 21:12:24,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:24,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753927162] [2021-12-18 21:12:24,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:24,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:24,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:24,566 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:12:24,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-12-18 21:12:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:24,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 21:12:24,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 21:12:24,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:25,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-18 21:12:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 21:12:25,748 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:25,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753927162] [2021-12-18 21:12:25,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753927162] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:12:25,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:12:25,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-12-18 21:12:25,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645771236] [2021-12-18 21:12:25,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:12:25,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 21:12:25,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:25,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 21:12:25,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-12-18 21:12:25,750 INFO L87 Difference]: Start difference. First operand 225 states and 271 transitions. Second operand has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:12:27,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:27,428 INFO L93 Difference]: Finished difference Result 294 states and 330 transitions. [2021-12-18 21:12:27,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 21:12:27,429 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2021-12-18 21:12:27,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:27,430 INFO L225 Difference]: With dead ends: 294 [2021-12-18 21:12:27,430 INFO L226 Difference]: Without dead ends: 294 [2021-12-18 21:12:27,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-12-18 21:12:27,431 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 544 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:27,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 792 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 303 Invalid, 0 Unknown, 50 Unchecked, 1.0s Time] [2021-12-18 21:12:27,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-12-18 21:12:27,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 222. [2021-12-18 21:12:27,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 197 states have (on average 1.2385786802030456) internal successors, (244), 207 states have internal predecessors, (244), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2021-12-18 21:12:27,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 264 transitions. [2021-12-18 21:12:27,434 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 264 transitions. Word has length 41 [2021-12-18 21:12:27,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:27,435 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 264 transitions. [2021-12-18 21:12:27,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:12:27,435 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 264 transitions. [2021-12-18 21:12:27,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 21:12:27,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:27,435 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:12:27,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-12-18 21:12:27,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:12:27,636 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:12:27,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:27,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1776836543, now seen corresponding path program 2 times [2021-12-18 21:12:27,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:27,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461562650] [2021-12-18 21:12:27,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:12:27,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:27,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:27,638 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:12:27,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-12-18 21:12:27,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:12:27,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:12:27,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 21:12:27,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:27,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:12:27,845 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-18 21:12:27,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:12:28,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:12:28,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:12:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:12:28,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:30,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-12-18 21:12:33,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2021-12-18 21:12:33,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 164 [2021-12-18 21:12:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:12:33,961 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:33,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461562650] [2021-12-18 21:12:33,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461562650] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:12:33,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:12:33,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-12-18 21:12:33,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762706049] [2021-12-18 21:12:33,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:12:33,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 21:12:33,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:33,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 21:12:33,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=312, Unknown=3, NotChecked=0, Total=380 [2021-12-18 21:12:33,962 INFO L87 Difference]: Start difference. First operand 222 states and 264 transitions. Second operand has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:12:34,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:34,541 INFO L93 Difference]: Finished difference Result 377 states and 436 transitions. [2021-12-18 21:12:34,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 21:12:34,541 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2021-12-18 21:12:34,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:34,542 INFO L225 Difference]: With dead ends: 377 [2021-12-18 21:12:34,542 INFO L226 Difference]: Without dead ends: 377 [2021-12-18 21:12:34,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=144, Invalid=665, Unknown=3, NotChecked=0, Total=812 [2021-12-18 21:12:34,543 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 151 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:34,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 903 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 359 Invalid, 0 Unknown, 137 Unchecked, 0.4s Time] [2021-12-18 21:12:34,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-18 21:12:34,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 244. [2021-12-18 21:12:34,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 216 states have (on average 1.2268518518518519) internal successors, (265), 227 states have internal predecessors, (265), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 21:12:34,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 288 transitions. [2021-12-18 21:12:34,561 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 288 transitions. Word has length 40 [2021-12-18 21:12:34,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:34,561 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 288 transitions. [2021-12-18 21:12:34,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:12:34,561 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 288 transitions. [2021-12-18 21:12:34,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 21:12:34,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:34,562 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:12:34,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-12-18 21:12:34,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:12:34,770 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:12:34,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:34,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1776836544, now seen corresponding path program 1 times [2021-12-18 21:12:34,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:34,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339011942] [2021-12-18 21:12:34,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:34,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:34,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:34,775 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:12:34,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-12-18 21:12:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:34,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 21:12:34,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:34,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:12:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:12:35,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:12:38,992 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:38,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339011942] [2021-12-18 21:12:38,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339011942] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:12:38,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:12:38,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2021-12-18 21:12:38,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361235639] [2021-12-18 21:12:38,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:12:38,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 21:12:38,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:38,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 21:12:38,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-12-18 21:12:38,993 INFO L87 Difference]: Start difference. First operand 244 states and 288 transitions. Second operand has 24 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:12:40,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:40,781 INFO L93 Difference]: Finished difference Result 304 states and 351 transitions. [2021-12-18 21:12:40,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 21:12:40,782 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 40 [2021-12-18 21:12:40,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:40,782 INFO L225 Difference]: With dead ends: 304 [2021-12-18 21:12:40,783 INFO L226 Difference]: Without dead ends: 304 [2021-12-18 21:12:40,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 21:12:40,783 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 107 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:40,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 1207 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 360 Invalid, 0 Unknown, 328 Unchecked, 0.8s Time] [2021-12-18 21:12:40,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-12-18 21:12:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 245. [2021-12-18 21:12:40,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 217 states have (on average 1.2304147465437787) internal successors, (267), 228 states have internal predecessors, (267), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 21:12:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 290 transitions. [2021-12-18 21:12:40,789 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 290 transitions. Word has length 40 [2021-12-18 21:12:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:40,789 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 290 transitions. [2021-12-18 21:12:40,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:12:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 290 transitions. [2021-12-18 21:12:40,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 21:12:40,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:40,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:12:40,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-12-18 21:12:40,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:12:40,995 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:12:40,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:40,995 INFO L85 PathProgramCache]: Analyzing trace with hash 392679819, now seen corresponding path program 1 times [2021-12-18 21:12:40,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:40,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513709837] [2021-12-18 21:12:40,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:40,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:40,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:40,997 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:12:40,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-12-18 21:12:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:41,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 21:12:41,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:41,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:12:41,229 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:12:41,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 21:12:41,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:12:41,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-18 21:12:41,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 21:12:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 21:12:41,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:41,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2021-12-18 21:12:48,924 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:48,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513709837] [2021-12-18 21:12:48,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513709837] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:12:48,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [579827185] [2021-12-18 21:12:48,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:48,924 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:12:48,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:12:48,925 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:12:48,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-12-18 21:12:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:49,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-18 21:12:49,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:49,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:12:49,317 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:12:49,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:12:49,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:12:49,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-18 21:12:49,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 21:12:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 21:12:49,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:49,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2021-12-18 21:12:49,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:12:49,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 56 [2021-12-18 21:12:49,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [579827185] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:12:49,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:12:49,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-12-18 21:12:49,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598405350] [2021-12-18 21:12:49,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:12:49,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 21:12:49,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:49,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 21:12:49,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=662, Unknown=3, NotChecked=0, Total=756 [2021-12-18 21:12:49,832 INFO L87 Difference]: Start difference. First operand 245 states and 290 transitions. Second operand has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 18 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 21:12:50,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:50,434 INFO L93 Difference]: Finished difference Result 266 states and 312 transitions. [2021-12-18 21:12:50,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 21:12:50,434 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 18 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2021-12-18 21:12:50,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:50,435 INFO L225 Difference]: With dead ends: 266 [2021-12-18 21:12:50,435 INFO L226 Difference]: Without dead ends: 266 [2021-12-18 21:12:50,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=161, Invalid=1026, Unknown=3, NotChecked=0, Total=1190 [2021-12-18 21:12:50,436 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 152 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:50,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 632 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 546 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2021-12-18 21:12:50,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-18 21:12:50,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 239. [2021-12-18 21:12:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 211 states have (on average 1.2417061611374407) internal successors, (262), 222 states have internal predecessors, (262), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 21:12:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 285 transitions. [2021-12-18 21:12:50,448 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 285 transitions. Word has length 41 [2021-12-18 21:12:50,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:50,448 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 285 transitions. [2021-12-18 21:12:50,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 18 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 21:12:50,448 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 285 transitions. [2021-12-18 21:12:50,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 21:12:50,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:50,449 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:12:50,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2021-12-18 21:12:50,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-12-18 21:12:50,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:12:50,856 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:12:50,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:50,856 INFO L85 PathProgramCache]: Analyzing trace with hash -503073279, now seen corresponding path program 1 times [2021-12-18 21:12:50,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:50,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638465118] [2021-12-18 21:12:50,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:50,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:50,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:50,858 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:12:50,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-12-18 21:12:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:50,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 21:12:50,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:50,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:12:51,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-18 21:12:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 21:12:51,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 21:12:52,067 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:52,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638465118] [2021-12-18 21:12:52,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638465118] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:12:52,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:12:52,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-12-18 21:12:52,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983159575] [2021-12-18 21:12:52,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:12:52,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 21:12:52,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:52,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 21:12:52,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-12-18 21:12:52,069 INFO L87 Difference]: Start difference. First operand 239 states and 285 transitions. Second operand has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:12:53,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:53,571 INFO L93 Difference]: Finished difference Result 451 states and 503 transitions. [2021-12-18 21:12:53,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 21:12:53,571 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2021-12-18 21:12:53,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:53,572 INFO L225 Difference]: With dead ends: 451 [2021-12-18 21:12:53,572 INFO L226 Difference]: Without dead ends: 451 [2021-12-18 21:12:53,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=521, Invalid=2029, Unknown=0, NotChecked=0, Total=2550 [2021-12-18 21:12:53,574 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 1084 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:53,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1084 Valid, 1342 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 493 Invalid, 0 Unknown, 152 Unchecked, 0.6s Time] [2021-12-18 21:12:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-12-18 21:12:53,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 230. [2021-12-18 21:12:53,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 202 states have (on average 1.2376237623762376) internal successors, (250), 213 states have internal predecessors, (250), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 21:12:53,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 273 transitions. [2021-12-18 21:12:53,580 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 273 transitions. Word has length 41 [2021-12-18 21:12:53,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:53,581 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 273 transitions. [2021-12-18 21:12:53,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:12:53,581 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 273 transitions. [2021-12-18 21:12:53,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-18 21:12:53,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:53,582 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2021-12-18 21:12:53,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-12-18 21:12:53,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:12:53,789 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:12:53,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:53,789 INFO L85 PathProgramCache]: Analyzing trace with hash 2062437122, now seen corresponding path program 1 times [2021-12-18 21:12:53,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:53,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285302566] [2021-12-18 21:12:53,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:53,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:53,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:53,791 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:12:53,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-12-18 21:12:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:53,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-18 21:12:53,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:53,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:12:54,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:12:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-18 21:12:54,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-18 21:12:54,307 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:54,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285302566] [2021-12-18 21:12:54,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285302566] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:12:54,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:12:54,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2021-12-18 21:12:54,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221054501] [2021-12-18 21:12:54,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:12:54,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 21:12:54,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:54,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 21:12:54,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-18 21:12:54,308 INFO L87 Difference]: Start difference. First operand 230 states and 273 transitions. Second operand has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 21:12:55,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:55,071 INFO L93 Difference]: Finished difference Result 326 states and 362 transitions. [2021-12-18 21:12:55,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 21:12:55,072 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2021-12-18 21:12:55,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:55,073 INFO L225 Difference]: With dead ends: 326 [2021-12-18 21:12:55,073 INFO L226 Difference]: Without dead ends: 326 [2021-12-18 21:12:55,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 21:12:55,074 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 446 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:55,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 908 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 366 Invalid, 0 Unknown, 42 Unchecked, 0.3s Time] [2021-12-18 21:12:55,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-12-18 21:12:55,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 238. [2021-12-18 21:12:55,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 208 states have (on average 1.2355769230769231) internal successors, (257), 220 states have internal predecessors, (257), 8 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 21:12:55,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 280 transitions. [2021-12-18 21:12:55,078 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 280 transitions. Word has length 42 [2021-12-18 21:12:55,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:55,078 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 280 transitions. [2021-12-18 21:12:55,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 21:12:55,079 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 280 transitions. [2021-12-18 21:12:55,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 21:12:55,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:55,079 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:12:55,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-12-18 21:12:55,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:12:55,287 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:12:55,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:55,287 INFO L85 PathProgramCache]: Analyzing trace with hash -752641937, now seen corresponding path program 1 times [2021-12-18 21:12:55,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:55,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608788353] [2021-12-18 21:12:55,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:55,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:55,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:55,289 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:12:55,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-12-18 21:12:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:55,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 21:12:55,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:55,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 21:12:55,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 21:12:55,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:12:55,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:59,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-18 21:12:59,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-18 21:12:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:12:59,701 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:59,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608788353] [2021-12-18 21:12:59,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608788353] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:12:59,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:12:59,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-12-18 21:12:59,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939363684] [2021-12-18 21:12:59,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:12:59,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 21:12:59,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:59,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 21:12:59,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=124, Unknown=2, NotChecked=0, Total=156 [2021-12-18 21:12:59,702 INFO L87 Difference]: Start difference. First operand 238 states and 280 transitions. Second operand has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:13:00,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:13:00,024 INFO L93 Difference]: Finished difference Result 278 states and 318 transitions. [2021-12-18 21:13:00,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 21:13:00,024 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-12-18 21:13:00,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:13:00,025 INFO L225 Difference]: With dead ends: 278 [2021-12-18 21:13:00,025 INFO L226 Difference]: Without dead ends: 278 [2021-12-18 21:13:00,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=61, Invalid=243, Unknown=2, NotChecked=0, Total=306 [2021-12-18 21:13:00,026 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 128 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:13:00,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 672 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 197 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2021-12-18 21:13:00,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-18 21:13:00,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 257. [2021-12-18 21:13:00,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 225 states have (on average 1.2266666666666666) internal successors, (276), 237 states have internal predecessors, (276), 8 states have call successors, (8), 6 states have call predecessors, (8), 10 states have return successors, (15), 13 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 21:13:00,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 299 transitions. [2021-12-18 21:13:00,034 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 299 transitions. Word has length 41 [2021-12-18 21:13:00,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:13:00,034 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 299 transitions. [2021-12-18 21:13:00,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:13:00,034 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 299 transitions. [2021-12-18 21:13:00,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-18 21:13:00,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:13:00,035 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:13:00,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-12-18 21:13:00,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:13:00,241 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:13:00,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:13:00,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1671328571, now seen corresponding path program 3 times [2021-12-18 21:13:00,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:13:00,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421956623] [2021-12-18 21:13:00,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:13:00,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:13:00,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:13:00,256 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:13:00,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-12-18 21:13:00,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 21:13:00,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:13:00,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-18 21:13:00,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:00,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:13:00,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:13:00,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:13:00,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:13:00,841 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:13:00,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:13:01,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:13:01,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:13:01,109 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:13:01,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:13:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-18 21:13:01,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:03,716 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:13:03,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421956623] [2021-12-18 21:13:03,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421956623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:13:03,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1909555343] [2021-12-18 21:13:03,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:13:03,717 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:13:03,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:13:03,718 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:13:03,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-12-18 21:13:03,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 21:13:03,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:13:03,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-18 21:13:03,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:03,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:13:03,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:13:04,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:13:04,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:13:04,214 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:13:04,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:13:06,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:13:06,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:13:06,397 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:13:06,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:13:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-18 21:13:06,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:08,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1909555343] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:13:08,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:13:08,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-12-18 21:13:08,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502648780] [2021-12-18 21:13:08,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:13:08,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 21:13:08,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:13:08,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 21:13:08,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=259, Unknown=1, NotChecked=0, Total=306 [2021-12-18 21:13:08,751 INFO L87 Difference]: Start difference. First operand 257 states and 299 transitions. Second operand has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:13:11,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:13:11,265 INFO L93 Difference]: Finished difference Result 291 states and 332 transitions. [2021-12-18 21:13:11,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 21:13:11,265 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2021-12-18 21:13:11,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:13:11,266 INFO L225 Difference]: With dead ends: 291 [2021-12-18 21:13:11,266 INFO L226 Difference]: Without dead ends: 291 [2021-12-18 21:13:11,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 67 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=88, Invalid=510, Unknown=2, NotChecked=0, Total=600 [2021-12-18 21:13:11,267 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 121 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:13:11,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 538 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 292 Invalid, 0 Unknown, 137 Unchecked, 0.3s Time] [2021-12-18 21:13:11,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-12-18 21:13:11,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 248. [2021-12-18 21:13:11,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 217 states have (on average 1.2304147465437787) internal successors, (267), 230 states have internal predecessors, (267), 7 states have call successors, (7), 6 states have call predecessors, (7), 10 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2021-12-18 21:13:11,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 287 transitions. [2021-12-18 21:13:11,270 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 287 transitions. Word has length 42 [2021-12-18 21:13:11,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:13:11,270 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 287 transitions. [2021-12-18 21:13:11,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:13:11,270 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 287 transitions. [2021-12-18 21:13:11,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-18 21:13:11,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:13:11,271 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:13:11,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2021-12-18 21:13:11,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2021-12-18 21:13:11,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:13:11,681 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:13:11,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:13:11,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1199661072, now seen corresponding path program 1 times [2021-12-18 21:13:11,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:13:11,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191102215] [2021-12-18 21:13:11,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:13:11,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:13:11,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:13:11,683 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:13:11,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-12-18 21:13:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:13:11,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 21:13:11,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:11,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:13:11,998 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 21:13:11,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:13:12,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:13:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:13:12,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:12,743 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:13:12,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191102215] [2021-12-18 21:13:12,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191102215] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:13:12,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1201936076] [2021-12-18 21:13:12,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:13:12,744 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:13:12,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:13:12,745 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:13:12,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-12-18 21:13:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:13:12,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 21:13:12,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:13,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:13:13,211 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 21:13:13,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:13:15,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:13:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:13:15,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:15,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1201936076] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:13:15,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:13:15,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-12-18 21:13:15,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530376698] [2021-12-18 21:13:15,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:13:15,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 21:13:15,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:13:15,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 21:13:15,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-12-18 21:13:15,899 INFO L87 Difference]: Start difference. First operand 248 states and 287 transitions. Second operand has 21 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 21:13:15,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:13:15,957 INFO L93 Difference]: Finished difference Result 264 states and 301 transitions. [2021-12-18 21:13:15,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 21:13:15,958 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2021-12-18 21:13:15,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:13:15,958 INFO L225 Difference]: With dead ends: 264 [2021-12-18 21:13:15,958 INFO L226 Difference]: Without dead ends: 243 [2021-12-18 21:13:15,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-12-18 21:13:15,960 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 37 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:13:15,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 389 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 116 Unchecked, 0.0s Time] [2021-12-18 21:13:15,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-18 21:13:15,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2021-12-18 21:13:15,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 212 states have (on average 1.2311320754716981) internal successors, (261), 226 states have internal predecessors, (261), 7 states have call successors, (7), 6 states have call predecessors, (7), 10 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-18 21:13:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 280 transitions. [2021-12-18 21:13:15,963 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 280 transitions. Word has length 42 [2021-12-18 21:13:15,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:13:15,963 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 280 transitions. [2021-12-18 21:13:15,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 21:13:15,964 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 280 transitions. [2021-12-18 21:13:15,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-18 21:13:15,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:13:15,964 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1] [2021-12-18 21:13:15,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-12-18 21:13:16,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2021-12-18 21:13:16,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:13:16,365 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:13:16,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:13:16,365 INFO L85 PathProgramCache]: Analyzing trace with hash -488958544, now seen corresponding path program 1 times [2021-12-18 21:13:16,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:13:16,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895083992] [2021-12-18 21:13:16,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:13:16,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:13:16,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:13:16,368 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:13:16,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-12-18 21:13:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:13:16,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 21:13:16,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:16,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:13:17,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:13:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 21:13:17,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-18 21:13:17,469 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:13:17,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895083992] [2021-12-18 21:13:17,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895083992] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:13:17,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:13:17,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 22 [2021-12-18 21:13:17,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996876361] [2021-12-18 21:13:17,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:13:17,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-18 21:13:17,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:13:17,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-18 21:13:17,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-12-18 21:13:17,470 INFO L87 Difference]: Start difference. First operand 243 states and 280 transitions. Second operand has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 20 states have internal predecessors, (65), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:13:17,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:13:17,691 INFO L93 Difference]: Finished difference Result 270 states and 308 transitions. [2021-12-18 21:13:17,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 21:13:17,691 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 20 states have internal predecessors, (65), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2021-12-18 21:13:17,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:13:17,692 INFO L225 Difference]: With dead ends: 270 [2021-12-18 21:13:17,692 INFO L226 Difference]: Without dead ends: 270 [2021-12-18 21:13:17,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-12-18 21:13:17,693 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 60 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:13:17,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 663 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 97 Unchecked, 0.1s Time] [2021-12-18 21:13:17,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-18 21:13:17,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 245. [2021-12-18 21:13:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 214 states have (on average 1.2289719626168225) internal successors, (263), 228 states have internal predecessors, (263), 7 states have call successors, (7), 6 states have call predecessors, (7), 10 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-18 21:13:17,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 282 transitions. [2021-12-18 21:13:17,696 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 282 transitions. Word has length 43 [2021-12-18 21:13:17,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:13:17,696 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 282 transitions. [2021-12-18 21:13:17,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 20 states have internal predecessors, (65), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:13:17,696 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 282 transitions. [2021-12-18 21:13:17,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-18 21:13:17,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:13:17,697 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:13:17,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-12-18 21:13:17,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:13:17,898 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:13:17,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:13:17,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1857063425, now seen corresponding path program 1 times [2021-12-18 21:13:17,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:13:17,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392250098] [2021-12-18 21:13:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:13:17,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:13:17,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:13:17,899 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:13:17,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-12-18 21:13:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:13:18,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 21:13:18,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:18,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 21:13:18,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 21:13:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:13:18,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:20,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-18 21:13:20,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-18 21:13:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:13:20,614 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:13:20,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392250098] [2021-12-18 21:13:20,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392250098] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:13:20,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:13:20,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-12-18 21:13:20,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040893947] [2021-12-18 21:13:20,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:13:20,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 21:13:20,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:13:20,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 21:13:20,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=188, Unknown=1, NotChecked=0, Total=240 [2021-12-18 21:13:20,616 INFO L87 Difference]: Start difference. First operand 245 states and 282 transitions. Second operand has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 21:13:21,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:13:21,385 INFO L93 Difference]: Finished difference Result 283 states and 317 transitions. [2021-12-18 21:13:21,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 21:13:21,386 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2021-12-18 21:13:21,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:13:21,387 INFO L225 Difference]: With dead ends: 283 [2021-12-18 21:13:21,387 INFO L226 Difference]: Without dead ends: 283 [2021-12-18 21:13:21,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=111, Invalid=394, Unknown=1, NotChecked=0, Total=506 [2021-12-18 21:13:21,389 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 252 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 21:13:21,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 492 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 410 Invalid, 0 Unknown, 33 Unchecked, 0.6s Time] [2021-12-18 21:13:21,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-12-18 21:13:21,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 251. [2021-12-18 21:13:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 220 states have (on average 1.2272727272727273) internal successors, (270), 234 states have internal predecessors, (270), 7 states have call successors, (7), 6 states have call predecessors, (7), 10 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-18 21:13:21,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 289 transitions. [2021-12-18 21:13:21,423 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 289 transitions. Word has length 42 [2021-12-18 21:13:21,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:13:21,423 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 289 transitions. [2021-12-18 21:13:21,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 21:13:21,424 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 289 transitions. [2021-12-18 21:13:21,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-18 21:13:21,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:13:21,424 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:13:21,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-12-18 21:13:21,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:13:21,632 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:13:21,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:13:21,632 INFO L85 PathProgramCache]: Analyzing trace with hash -591810866, now seen corresponding path program 1 times [2021-12-18 21:13:21,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:13:21,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145660869] [2021-12-18 21:13:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:13:21,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:13:21,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:13:21,648 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:13:21,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-12-18 21:13:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:13:21,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 21:13:21,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:22,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:13:22,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-12-18 21:13:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 21:13:34,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:37,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2021-12-18 21:13:48,592 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:13:48,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145660869] [2021-12-18 21:13:48,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145660869] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:13:48,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [304759375] [2021-12-18 21:13:48,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:13:48,593 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:13:48,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:13:48,594 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:13:48,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2021-12-18 21:13:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:13:48,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-18 21:13:48,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:51,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:13:51,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-12-18 21:13:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 21:13:54,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:59,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2021-12-18 21:14:20,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [304759375] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:14:20,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:14:20,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-12-18 21:14:20,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999232373] [2021-12-18 21:14:20,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:14:20,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 21:14:20,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:14:20,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 21:14:20,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1699, Unknown=15, NotChecked=0, Total=1892 [2021-12-18 21:14:20,991 INFO L87 Difference]: Start difference. First operand 251 states and 289 transitions. Second operand has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 25 states have internal predecessors, (71), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:14:21,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:14:21,120 INFO L93 Difference]: Finished difference Result 257 states and 294 transitions. [2021-12-18 21:14:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 21:14:21,121 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 25 states have internal predecessors, (71), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2021-12-18 21:14:21,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:14:21,121 INFO L225 Difference]: With dead ends: 257 [2021-12-18 21:14:21,121 INFO L226 Difference]: Without dead ends: 230 [2021-12-18 21:14:21,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=187, Invalid=1868, Unknown=15, NotChecked=0, Total=2070 [2021-12-18 21:14:21,122 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 20 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:14:21,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 615 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 210 Unchecked, 0.0s Time] [2021-12-18 21:14:21,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-18 21:14:21,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2021-12-18 21:14:21,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 201 states have (on average 1.243781094527363) internal successors, (250), 215 states have internal predecessors, (250), 6 states have call successors, (6), 5 states have call predecessors, (6), 9 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2021-12-18 21:14:21,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 267 transitions. [2021-12-18 21:14:21,125 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 267 transitions. Word has length 43 [2021-12-18 21:14:21,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:14:21,125 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 267 transitions. [2021-12-18 21:14:21,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 25 states have internal predecessors, (71), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:14:21,125 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 267 transitions. [2021-12-18 21:14:21,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-18 21:14:21,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:14:21,126 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1] [2021-12-18 21:14:21,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2021-12-18 21:14:21,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2021-12-18 21:14:21,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:14:21,536 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:14:21,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:14:21,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2022154436, now seen corresponding path program 1 times [2021-12-18 21:14:21,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:14:21,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592063039] [2021-12-18 21:14:21,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:14:21,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:14:21,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:14:21,538 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:14:21,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-12-18 21:14:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:14:21,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 21:14:21,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:14:21,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:14:21,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:14:21,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-12-18 21:14:21,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-12-18 21:14:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 21:14:21,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:14:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 21:14:22,259 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:14:22,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592063039] [2021-12-18 21:14:22,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592063039] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:14:22,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:14:22,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2021-12-18 21:14:22,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183552261] [2021-12-18 21:14:22,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:14:22,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 21:14:22,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:14:22,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 21:14:22,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-12-18 21:14:22,260 INFO L87 Difference]: Start difference. First operand 230 states and 267 transitions. Second operand has 20 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 21:14:23,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:14:23,157 INFO L93 Difference]: Finished difference Result 270 states and 307 transitions. [2021-12-18 21:14:23,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 21:14:23,158 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2021-12-18 21:14:23,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:14:23,159 INFO L225 Difference]: With dead ends: 270 [2021-12-18 21:14:23,159 INFO L226 Difference]: Without dead ends: 270 [2021-12-18 21:14:23,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 21:14:23,160 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 185 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:14:23,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 835 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 695 Invalid, 0 Unknown, 67 Unchecked, 0.5s Time] [2021-12-18 21:14:23,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-18 21:14:23,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 232. [2021-12-18 21:14:23,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 203 states have (on average 1.2413793103448276) internal successors, (252), 217 states have internal predecessors, (252), 6 states have call successors, (6), 5 states have call predecessors, (6), 9 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2021-12-18 21:14:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 269 transitions. [2021-12-18 21:14:23,164 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 269 transitions. Word has length 44 [2021-12-18 21:14:23,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:14:23,164 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 269 transitions. [2021-12-18 21:14:23,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 21:14:23,165 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 269 transitions. [2021-12-18 21:14:23,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-18 21:14:23,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:14:23,166 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-12-18 21:14:23,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-12-18 21:14:23,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:14:23,374 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:14:23,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:14:23,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1737721805, now seen corresponding path program 1 times [2021-12-18 21:14:23,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:14:23,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350018269] [2021-12-18 21:14:23,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:14:23,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:14:23,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:14:23,376 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:14:23,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-12-18 21:14:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:14:23,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 21:14:23,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:14:23,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:14:23,635 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:14:23,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 21:14:23,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:14:23,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 21:14:27,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-18 21:14:27,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:14:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 21:14:27,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:14:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 21:14:28,541 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:14:28,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350018269] [2021-12-18 21:14:28,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350018269] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:14:28,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:14:28,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-12-18 21:14:28,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138451932] [2021-12-18 21:14:28,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:14:28,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-18 21:14:28,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:14:28,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-18 21:14:28,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=620, Unknown=1, NotChecked=0, Total=702 [2021-12-18 21:14:28,543 INFO L87 Difference]: Start difference. First operand 232 states and 269 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 23 states have internal predecessors, (62), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:14:29,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:14:29,665 INFO L93 Difference]: Finished difference Result 279 states and 315 transitions. [2021-12-18 21:14:29,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 21:14:29,666 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 23 states have internal predecessors, (62), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2021-12-18 21:14:29,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:14:29,667 INFO L225 Difference]: With dead ends: 279 [2021-12-18 21:14:29,667 INFO L226 Difference]: Without dead ends: 279 [2021-12-18 21:14:29,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=162, Invalid=1319, Unknown=1, NotChecked=0, Total=1482 [2021-12-18 21:14:29,668 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 168 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 21:14:29,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 925 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 734 Invalid, 0 Unknown, 82 Unchecked, 0.7s Time] [2021-12-18 21:14:29,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-18 21:14:29,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 234. [2021-12-18 21:14:29,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 205 states have (on average 1.2390243902439024) internal successors, (254), 219 states have internal predecessors, (254), 6 states have call successors, (6), 5 states have call predecessors, (6), 9 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2021-12-18 21:14:29,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 271 transitions. [2021-12-18 21:14:29,700 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 271 transitions. Word has length 45 [2021-12-18 21:14:29,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:14:29,700 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 271 transitions. [2021-12-18 21:14:29,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 23 states have internal predecessors, (62), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:14:29,701 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 271 transitions. [2021-12-18 21:14:29,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-18 21:14:29,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:14:29,701 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:14:29,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-12-18 21:14:29,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:14:29,909 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:14:29,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:14:29,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1233148047, now seen corresponding path program 2 times [2021-12-18 21:14:29,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:14:29,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234905523] [2021-12-18 21:14:29,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:14:29,910 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:14:29,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:14:29,924 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:14:29,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-12-18 21:14:30,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:14:30,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:14:30,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 21:14:30,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:14:30,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:14:30,144 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-18 21:14:30,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-18 21:14:30,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 21:14:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:14:30,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:14:34,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-18 21:14:34,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2021-12-18 21:14:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:14:34,631 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:14:34,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234905523] [2021-12-18 21:14:34,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234905523] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:14:34,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:14:34,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-12-18 21:14:34,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872191771] [2021-12-18 21:14:34,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:14:34,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-18 21:14:34,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:14:34,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-18 21:14:34,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=219, Unknown=2, NotChecked=0, Total=272 [2021-12-18 21:14:34,632 INFO L87 Difference]: Start difference. First operand 234 states and 271 transitions. Second operand has 17 states, 16 states have (on average 3.6875) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:14:35,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:14:35,071 INFO L93 Difference]: Finished difference Result 239 states and 273 transitions. [2021-12-18 21:14:35,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 21:14:35,072 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.6875) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2021-12-18 21:14:35,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:14:35,073 INFO L225 Difference]: With dead ends: 239 [2021-12-18 21:14:35,073 INFO L226 Difference]: Without dead ends: 239 [2021-12-18 21:14:35,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=71, Invalid=307, Unknown=2, NotChecked=0, Total=380 [2021-12-18 21:14:35,073 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 54 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:14:35,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 555 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 241 Invalid, 0 Unknown, 37 Unchecked, 0.3s Time] [2021-12-18 21:14:35,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-18 21:14:35,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 219. [2021-12-18 21:14:35,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 190 states have (on average 1.2473684210526317) internal successors, (237), 205 states have internal predecessors, (237), 6 states have call successors, (6), 5 states have call predecessors, (6), 9 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2021-12-18 21:14:35,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 254 transitions. [2021-12-18 21:14:35,076 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 254 transitions. Word has length 44 [2021-12-18 21:14:35,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:14:35,076 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 254 transitions. [2021-12-18 21:14:35,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.6875) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:14:35,076 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 254 transitions. [2021-12-18 21:14:35,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 21:14:35,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:14:35,077 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1] [2021-12-18 21:14:35,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-12-18 21:14:35,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:14:35,284 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:14:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:14:35,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1988382823, now seen corresponding path program 2 times [2021-12-18 21:14:35,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:14:35,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273845182] [2021-12-18 21:14:35,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:14:35,285 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:14:35,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:14:35,286 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:14:35,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-12-18 21:14:35,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:14:35,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:14:35,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 21:14:35,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:14:35,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:14:35,719 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-18 21:14:35,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-18 21:14:35,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:14:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 21:14:35,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:14:37,892 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_alloc_17_~i~0#1| (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_17_~array#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_17_~array#1.base|) (bvadd |c_ULTIMATE.start_alloc_17_~array#1.offset| (bvmul |ULTIMATE.start_alloc_17_~i~0#1| (_ bv4 32))) |c_ULTIMATE.start_alloc_17_#t~ret39#1.offset|)) |c_ULTIMATE.start_entry_point_~array~0#1.base|) |c_ULTIMATE.start_entry_point_~array~0#1.offset|) (_ bv0 32))) is different from false [2021-12-18 21:14:38,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-18 21:14:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 1 not checked. [2021-12-18 21:14:38,348 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:14:38,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273845182] [2021-12-18 21:14:38,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273845182] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:14:38,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:14:38,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-12-18 21:14:38,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766941458] [2021-12-18 21:14:38,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:14:38,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 21:14:38,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:14:38,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 21:14:38,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=316, Unknown=1, NotChecked=36, Total=420 [2021-12-18 21:14:38,349 INFO L87 Difference]: Start difference. First operand 219 states and 254 transitions. Second operand has 21 states, 20 states have (on average 2.5) internal successors, (50), 17 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:14:39,664 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_alloc_17_~i~0#1| (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_17_~array#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_17_~array#1.base|) (bvadd |c_ULTIMATE.start_alloc_17_~array#1.offset| (bvmul |ULTIMATE.start_alloc_17_~i~0#1| (_ bv4 32))) |c_ULTIMATE.start_alloc_17_#t~ret39#1.offset|)) |c_ULTIMATE.start_entry_point_~array~0#1.base|) |c_ULTIMATE.start_entry_point_~array~0#1.offset|) (_ bv0 32))) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_17_~array#1.base|) |c_ULTIMATE.start_alloc_17_~array#1.offset|) (_ bv0 32)) (= |c_ULTIMATE.start_alloc_17_~array#1.base| |c_ULTIMATE.start_entry_point_~array~0#1.base|) (= |c_ULTIMATE.start_alloc_17_~array#1.offset| |c_ULTIMATE.start_entry_point_~array~0#1.offset|) (= |c_ULTIMATE.start_alloc_17_#t~ret39#1.offset| (_ bv0 32))) is different from false [2021-12-18 21:14:39,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:14:39,959 INFO L93 Difference]: Finished difference Result 267 states and 302 transitions. [2021-12-18 21:14:39,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 21:14:39,961 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 17 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 46 [2021-12-18 21:14:39,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:14:39,962 INFO L225 Difference]: With dead ends: 267 [2021-12-18 21:14:39,962 INFO L226 Difference]: Without dead ends: 267 [2021-12-18 21:14:39,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=110, Invalid=496, Unknown=2, NotChecked=94, Total=702 [2021-12-18 21:14:39,962 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 117 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:14:39,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 526 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 216 Invalid, 0 Unknown, 164 Unchecked, 0.3s Time] [2021-12-18 21:14:39,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-12-18 21:14:39,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 219. [2021-12-18 21:14:39,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 190 states have (on average 1.2526315789473683) internal successors, (238), 205 states have internal predecessors, (238), 6 states have call successors, (6), 5 states have call predecessors, (6), 9 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2021-12-18 21:14:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 255 transitions. [2021-12-18 21:14:39,965 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 255 transitions. Word has length 46 [2021-12-18 21:14:39,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:14:39,965 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 255 transitions. [2021-12-18 21:14:39,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 17 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:14:39,965 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 255 transitions. [2021-12-18 21:14:39,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-18 21:14:39,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:14:39,966 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:14:39,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-12-18 21:14:40,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:14:40,168 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:14:40,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:14:40,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1665358864, now seen corresponding path program 2 times [2021-12-18 21:14:40,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:14:40,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791164468] [2021-12-18 21:14:40,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:14:40,168 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:14:40,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:14:40,169 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:14:40,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-12-18 21:14:40,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:14:40,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:14:40,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-18 21:14:40,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:14:40,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:14:40,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-18 21:14:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 21:14:41,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:14:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 21:14:41,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:14:41,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791164468] [2021-12-18 21:14:41,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791164468] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:14:41,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:14:41,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-12-18 21:14:41,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332111274] [2021-12-18 21:14:41,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:14:41,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 21:14:41,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:14:41,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 21:14:41,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-12-18 21:14:41,871 INFO L87 Difference]: Start difference. First operand 219 states and 255 transitions. Second operand has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:14:44,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:14:44,036 INFO L93 Difference]: Finished difference Result 366 states and 419 transitions. [2021-12-18 21:14:44,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 21:14:44,037 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2021-12-18 21:14:44,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:14:44,038 INFO L225 Difference]: With dead ends: 366 [2021-12-18 21:14:44,038 INFO L226 Difference]: Without dead ends: 358 [2021-12-18 21:14:44,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=554, Invalid=2526, Unknown=0, NotChecked=0, Total=3080 [2021-12-18 21:14:44,039 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 987 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 21:14:44,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [987 Valid, 793 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 579 Invalid, 0 Unknown, 120 Unchecked, 0.7s Time] [2021-12-18 21:14:44,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-18 21:14:44,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 221. [2021-12-18 21:14:44,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 192 states have (on average 1.265625) internal successors, (243), 207 states have internal predecessors, (243), 6 states have call successors, (6), 5 states have call predecessors, (6), 9 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2021-12-18 21:14:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 260 transitions. [2021-12-18 21:14:44,042 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 260 transitions. Word has length 45 [2021-12-18 21:14:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:14:44,042 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 260 transitions. [2021-12-18 21:14:44,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:14:44,042 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 260 transitions. [2021-12-18 21:14:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-18 21:14:44,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:14:44,043 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1] [2021-12-18 21:14:44,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2021-12-18 21:14:44,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:14:44,251 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:14:44,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:14:44,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1510325227, now seen corresponding path program 2 times [2021-12-18 21:14:44,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:14:44,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125061801] [2021-12-18 21:14:44,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:14:44,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:14:44,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:14:44,253 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:14:44,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-12-18 21:14:44,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:14:44,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:14:44,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-18 21:14:44,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:14:44,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:14:44,696 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-18 21:14:44,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:14:44,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:14:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 21:14:44,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:14:45,577 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:14:45,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125061801] [2021-12-18 21:14:45,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125061801] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:14:45,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [974850922] [2021-12-18 21:14:45,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:14:45,578 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:14:45,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:14:45,579 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:14:45,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2021-12-18 21:14:45,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:14:45,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:14:45,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-18 21:14:45,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:14:46,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:14:46,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:14:46,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:14:46,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:14:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 21:14:46,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:14:47,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [974850922] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:14:47,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:14:47,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2021-12-18 21:14:47,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338666263] [2021-12-18 21:14:47,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:14:47,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 21:14:47,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:14:47,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 21:14:47,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-12-18 21:14:47,588 INFO L87 Difference]: Start difference. First operand 221 states and 260 transitions. Second operand has 24 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 21 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:14:49,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:14:49,245 INFO L93 Difference]: Finished difference Result 336 states and 375 transitions. [2021-12-18 21:14:49,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 21:14:49,246 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 21 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 47 [2021-12-18 21:14:49,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:14:49,247 INFO L225 Difference]: With dead ends: 336 [2021-12-18 21:14:49,247 INFO L226 Difference]: Without dead ends: 336 [2021-12-18 21:14:49,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2021-12-18 21:14:49,248 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 265 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:14:49,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 885 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 958 Invalid, 0 Unknown, 43 Unchecked, 1.2s Time] [2021-12-18 21:14:49,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-18 21:14:49,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 249. [2021-12-18 21:14:49,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 219 states have (on average 1.2831050228310503) internal successors, (281), 234 states have internal predecessors, (281), 7 states have call successors, (7), 5 states have call predecessors, (7), 9 states have return successors, (13), 9 states have call predecessors, (13), 7 states have call successors, (13) [2021-12-18 21:14:49,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 301 transitions. [2021-12-18 21:14:49,251 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 301 transitions. Word has length 47 [2021-12-18 21:14:49,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:14:49,252 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 301 transitions. [2021-12-18 21:14:49,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 21 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:14:49,264 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 301 transitions. [2021-12-18 21:14:49,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 21:14:49,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:14:49,265 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:14:49,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2021-12-18 21:14:49,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (63)] Ended with exit code 0 [2021-12-18 21:14:49,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:14:49,676 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:14:49,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:14:49,676 INFO L85 PathProgramCache]: Analyzing trace with hash -791017244, now seen corresponding path program 3 times [2021-12-18 21:14:49,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:14:49,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807484060] [2021-12-18 21:14:49,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:14:49,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:14:49,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:14:49,678 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:14:49,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-12-18 21:14:49,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 21:14:49,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:14:49,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 21:14:49,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:14:49,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 21:14:50,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 21:14:50,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:14:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:14:50,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:14:52,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-12-18 21:14:52,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-18 21:14:52,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-18 21:14:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:14:52,600 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:14:52,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807484060] [2021-12-18 21:14:52,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807484060] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:14:52,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:14:52,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-12-18 21:14:52,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426574451] [2021-12-18 21:14:52,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:14:52,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 21:14:52,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:14:52,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 21:14:52,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=324, Unknown=1, NotChecked=0, Total=380 [2021-12-18 21:14:52,601 INFO L87 Difference]: Start difference. First operand 249 states and 301 transitions. Second operand has 20 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:14:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:14:53,374 INFO L93 Difference]: Finished difference Result 274 states and 327 transitions. [2021-12-18 21:14:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 21:14:53,375 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 46 [2021-12-18 21:14:53,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:14:53,376 INFO L225 Difference]: With dead ends: 274 [2021-12-18 21:14:53,376 INFO L226 Difference]: Without dead ends: 274 [2021-12-18 21:14:53,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=118, Invalid=583, Unknown=1, NotChecked=0, Total=702 [2021-12-18 21:14:53,376 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 184 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:14:53,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 699 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 361 Invalid, 0 Unknown, 70 Unchecked, 0.5s Time] [2021-12-18 21:14:53,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-12-18 21:14:53,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 252. [2021-12-18 21:14:53,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 222 states have (on average 1.2882882882882882) internal successors, (286), 237 states have internal predecessors, (286), 7 states have call successors, (7), 5 states have call predecessors, (7), 9 states have return successors, (13), 9 states have call predecessors, (13), 7 states have call successors, (13) [2021-12-18 21:14:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 306 transitions. [2021-12-18 21:14:53,379 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 306 transitions. Word has length 46 [2021-12-18 21:14:53,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:14:53,380 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 306 transitions. [2021-12-18 21:14:53,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:14:53,380 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 306 transitions. [2021-12-18 21:14:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 21:14:53,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:14:53,380 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:14:53,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2021-12-18 21:14:53,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:14:53,588 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:14:53,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:14:53,588 INFO L85 PathProgramCache]: Analyzing trace with hash -791017243, now seen corresponding path program 2 times [2021-12-18 21:14:53,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:14:53,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557981282] [2021-12-18 21:14:53,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:14:53,589 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:14:53,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:14:53,590 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:14:53,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-12-18 21:14:53,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:14:53,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:14:53,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-18 21:14:53,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:14:53,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:14:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 21:14:54,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:14:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 21:14:59,736 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:14:59,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557981282] [2021-12-18 21:14:59,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557981282] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:14:59,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:14:59,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2021-12-18 21:14:59,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954273950] [2021-12-18 21:14:59,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:14:59,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 21:14:59,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:14:59,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 21:14:59,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=564, Unknown=1, NotChecked=0, Total=650 [2021-12-18 21:14:59,738 INFO L87 Difference]: Start difference. First operand 252 states and 306 transitions. Second operand has 26 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 24 states have internal predecessors, (76), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:15:02,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:15:02,929 INFO L93 Difference]: Finished difference Result 289 states and 341 transitions. [2021-12-18 21:15:02,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 21:15:02,930 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 24 states have internal predecessors, (76), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2021-12-18 21:15:02,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:15:02,931 INFO L225 Difference]: With dead ends: 289 [2021-12-18 21:15:02,931 INFO L226 Difference]: Without dead ends: 289 [2021-12-18 21:15:02,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=277, Invalid=1362, Unknown=1, NotChecked=0, Total=1640 [2021-12-18 21:15:02,931 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 326 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:15:02,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 748 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 431 Invalid, 0 Unknown, 153 Unchecked, 1.5s Time] [2021-12-18 21:15:02,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-12-18 21:15:02,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 264. [2021-12-18 21:15:02,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 234 states have (on average 1.311965811965812) internal successors, (307), 249 states have internal predecessors, (307), 7 states have call successors, (7), 5 states have call predecessors, (7), 9 states have return successors, (13), 9 states have call predecessors, (13), 7 states have call successors, (13) [2021-12-18 21:15:02,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 327 transitions. [2021-12-18 21:15:02,934 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 327 transitions. Word has length 46 [2021-12-18 21:15:02,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:15:02,934 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 327 transitions. [2021-12-18 21:15:02,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 24 states have internal predecessors, (76), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:15:02,935 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 327 transitions. [2021-12-18 21:15:02,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 21:15:02,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:15:02,935 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:15:02,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2021-12-18 21:15:03,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:15:03,140 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:15:03,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:15:03,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1695568831, now seen corresponding path program 4 times [2021-12-18 21:15:03,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:15:03,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685744627] [2021-12-18 21:15:03,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 21:15:03,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:15:03,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:15:03,142 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:15:03,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-12-18 21:15:03,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 21:15:03,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:15:03,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 21:15:03,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:15:03,288 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:15:03,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:15:03,491 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-18 21:15:03,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-18 21:15:03,580 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-18 21:15:03,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-18 21:15:03,658 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-18 21:15:03,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:15:03,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-18 21:15:03,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:15:03,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-18 21:15:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:15:04,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:15:04,170 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:15:04,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685744627] [2021-12-18 21:15:04,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685744627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:15:04,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1825026473] [2021-12-18 21:15:04,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 21:15:04,171 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:15:04,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:15:04,172 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:15:04,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2021-12-18 21:15:04,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 21:15:04,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:15:04,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 21:15:04,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:15:04,414 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:15:04,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:15:04,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:15:04,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-12-18 21:15:04,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:15:04,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-12-18 21:15:04,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:15:04,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:15:04,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-18 21:15:05,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:15:05,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-18 21:15:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:15:05,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:15:05,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1825026473] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:15:05,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:15:05,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-12-18 21:15:05,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456180787] [2021-12-18 21:15:05,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:15:05,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 21:15:05,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:15:05,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 21:15:05,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-12-18 21:15:05,380 INFO L87 Difference]: Start difference. First operand 264 states and 327 transitions. Second operand has 26 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 21:15:05,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:15:05,968 INFO L93 Difference]: Finished difference Result 264 states and 326 transitions. [2021-12-18 21:15:05,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 21:15:05,968 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2021-12-18 21:15:05,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:15:05,969 INFO L225 Difference]: With dead ends: 264 [2021-12-18 21:15:05,969 INFO L226 Difference]: Without dead ends: 264 [2021-12-18 21:15:05,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 21:15:05,970 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 109 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:15:05,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 447 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 435 Invalid, 0 Unknown, 107 Unchecked, 0.5s Time] [2021-12-18 21:15:05,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-12-18 21:15:05,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 238. [2021-12-18 21:15:05,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 212 states have (on average 1.3349056603773586) internal successors, (283), 225 states have internal predecessors, (283), 5 states have call successors, (5), 4 states have call predecessors, (5), 7 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-18 21:15:05,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 297 transitions. [2021-12-18 21:15:05,972 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 297 transitions. Word has length 46 [2021-12-18 21:15:05,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:15:05,973 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 297 transitions. [2021-12-18 21:15:05,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 21:15:05,973 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 297 transitions. [2021-12-18 21:15:05,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 21:15:05,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:15:05,973 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1] [2021-12-18 21:15:05,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Ended with exit code 0 [2021-12-18 21:15:06,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2021-12-18 21:15:06,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:15:06,375 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:15:06,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:15:06,375 INFO L85 PathProgramCache]: Analyzing trace with hash 424558363, now seen corresponding path program 2 times [2021-12-18 21:15:06,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:15:06,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543946354] [2021-12-18 21:15:06,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:15:06,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:15:06,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:15:06,377 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:15:06,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2021-12-18 21:15:06,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:15:06,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:15:06,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-18 21:15:06,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:15:06,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:15:06,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:15:06,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-12-18 21:15:06,832 INFO L354 Elim1Store]: treesize reduction 39, result has 30.4 percent of original size [2021-12-18 21:15:06,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2021-12-18 21:15:06,899 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-18 21:15:06,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-18 21:15:06,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-12-18 21:15:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 21:15:06,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:15:13,423 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:15:13,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543946354] [2021-12-18 21:15:13,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543946354] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:15:13,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [828394654] [2021-12-18 21:15:13,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:15:13,423 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:15:13,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:15:13,424 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:15:13,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2021-12-18 21:15:13,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:15:13,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:15:13,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-18 21:15:13,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:15:13,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:15:14,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:15:14,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-12-18 21:15:14,457 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-12-18 21:15:14,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2021-12-18 21:15:14,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:15:14,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-18 21:15:14,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-12-18 21:15:14,786 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 21:15:14,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:15:19,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [828394654] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:15:19,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:15:19,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 23 [2021-12-18 21:15:19,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747459376] [2021-12-18 21:15:19,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:15:19,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 21:15:19,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:15:19,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 21:15:19,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=612, Unknown=3, NotChecked=0, Total=702 [2021-12-18 21:15:19,220 INFO L87 Difference]: Start difference. First operand 238 states and 297 transitions. Second operand has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:15:20,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:15:20,351 INFO L93 Difference]: Finished difference Result 288 states and 342 transitions. [2021-12-18 21:15:20,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 21:15:20,352 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2021-12-18 21:15:20,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:15:20,353 INFO L225 Difference]: With dead ends: 288 [2021-12-18 21:15:20,353 INFO L226 Difference]: Without dead ends: 288 [2021-12-18 21:15:20,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=125, Invalid=864, Unknown=3, NotChecked=0, Total=992 [2021-12-18 21:15:20,353 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 148 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 21:15:20,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 856 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 801 Invalid, 0 Unknown, 103 Unchecked, 0.9s Time] [2021-12-18 21:15:20,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-12-18 21:15:20,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 245. [2021-12-18 21:15:20,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 219 states have (on average 1.3287671232876712) internal successors, (291), 232 states have internal predecessors, (291), 5 states have call successors, (5), 4 states have call predecessors, (5), 7 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-18 21:15:20,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 305 transitions. [2021-12-18 21:15:20,356 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 305 transitions. Word has length 48 [2021-12-18 21:15:20,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:15:20,356 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 305 transitions. [2021-12-18 21:15:20,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:15:20,357 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 305 transitions. [2021-12-18 21:15:20,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-18 21:15:20,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:15:20,357 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:15:20,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (69)] Forceful destruction successful, exit code 0 [2021-12-18 21:15:20,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2021-12-18 21:15:20,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:15:20,774 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:15:20,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:15:20,774 INFO L85 PathProgramCache]: Analyzing trace with hash -507079458, now seen corresponding path program 4 times [2021-12-18 21:15:20,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:15:20,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815356567] [2021-12-18 21:15:20,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 21:15:20,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:15:20,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:15:20,776 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:15:20,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-12-18 21:15:20,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 21:15:20,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:15:20,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 21:15:20,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:15:20,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:15:21,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-18 21:15:21,556 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 21:15:21,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:15:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 21:15:22,279 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:15:22,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815356567] [2021-12-18 21:15:22,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815356567] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:15:22,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:15:22,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 25 [2021-12-18 21:15:22,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976682782] [2021-12-18 21:15:22,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:15:22,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-18 21:15:22,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:15:22,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-18 21:15:22,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-12-18 21:15:22,281 INFO L87 Difference]: Start difference. First operand 245 states and 305 transitions. Second operand has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:15:24,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:15:24,376 INFO L93 Difference]: Finished difference Result 412 states and 491 transitions. [2021-12-18 21:15:24,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 21:15:24,377 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 49 [2021-12-18 21:15:24,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:15:24,378 INFO L225 Difference]: With dead ends: 412 [2021-12-18 21:15:24,378 INFO L226 Difference]: Without dead ends: 412 [2021-12-18 21:15:24,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2021-12-18 21:15:24,379 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 685 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:15:24,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 1150 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-18 21:15:24,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-12-18 21:15:24,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 259. [2021-12-18 21:15:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 231 states have (on average 1.3116883116883118) internal successors, (303), 244 states have internal predecessors, (303), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2021-12-18 21:15:24,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 323 transitions. [2021-12-18 21:15:24,382 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 323 transitions. Word has length 49 [2021-12-18 21:15:24,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:15:24,382 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 323 transitions. [2021-12-18 21:15:24,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:15:24,382 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 323 transitions. [2021-12-18 21:15:24,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 21:15:24,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:15:24,382 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:15:24,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (70)] Ended with exit code 0 [2021-12-18 21:15:24,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:15:24,583 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:15:24,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:15:24,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1229413940, now seen corresponding path program 1 times [2021-12-18 21:15:24,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:15:24,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134190817] [2021-12-18 21:15:24,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:15:24,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:15:24,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:15:24,585 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:15:24,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2021-12-18 21:15:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:15:24,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 21:15:24,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:15:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-18 21:15:24,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:15:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-18 21:15:24,887 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:15:24,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134190817] [2021-12-18 21:15:24,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134190817] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:15:24,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:15:24,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-18 21:15:24,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179438637] [2021-12-18 21:15:24,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:15:24,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:15:24,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:15:24,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:15:24,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:15:24,888 INFO L87 Difference]: Start difference. First operand 259 states and 323 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:15:25,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:15:25,024 INFO L93 Difference]: Finished difference Result 321 states and 382 transitions. [2021-12-18 21:15:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:15:25,025 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 48 [2021-12-18 21:15:25,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:15:25,026 INFO L225 Difference]: With dead ends: 321 [2021-12-18 21:15:25,026 INFO L226 Difference]: Without dead ends: 321 [2021-12-18 21:15:25,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-18 21:15:25,026 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 221 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:15:25,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 451 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:15:25,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-12-18 21:15:25,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 254. [2021-12-18 21:15:25,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 226 states have (on average 1.2920353982300885) internal successors, (292), 239 states have internal predecessors, (292), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2021-12-18 21:15:25,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 312 transitions. [2021-12-18 21:15:25,034 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 312 transitions. Word has length 48 [2021-12-18 21:15:25,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:15:25,035 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 312 transitions. [2021-12-18 21:15:25,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:15:25,035 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 312 transitions. [2021-12-18 21:15:25,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-18 21:15:25,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:15:25,035 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-12-18 21:15:25,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2021-12-18 21:15:25,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:15:25,243 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:15:25,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:15:25,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1248269290, now seen corresponding path program 3 times [2021-12-18 21:15:25,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:15:25,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235147133] [2021-12-18 21:15:25,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:15:25,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:15:25,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:15:25,245 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:15:25,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-12-18 21:15:25,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 21:15:25,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:15:25,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 21:15:25,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:15:25,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:15:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:15:26,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:15:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:15:28,989 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:15:28,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235147133] [2021-12-18 21:15:28,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235147133] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:15:28,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:15:28,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-12-18 21:15:28,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350552782] [2021-12-18 21:15:28,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:15:28,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-18 21:15:28,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:15:28,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-18 21:15:28,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 21:15:28,991 INFO L87 Difference]: Start difference. First operand 254 states and 312 transitions. Second operand has 33 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:15:31,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:15:31,576 INFO L93 Difference]: Finished difference Result 289 states and 347 transitions. [2021-12-18 21:15:31,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 21:15:31,578 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 47 [2021-12-18 21:15:31,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:15:31,578 INFO L225 Difference]: With dead ends: 289 [2021-12-18 21:15:31,578 INFO L226 Difference]: Without dead ends: 288 [2021-12-18 21:15:31,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=293, Invalid=1777, Unknown=0, NotChecked=0, Total=2070 [2021-12-18 21:15:31,579 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 211 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:15:31,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1031 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 456 Invalid, 0 Unknown, 134 Unchecked, 1.2s Time] [2021-12-18 21:15:31,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-12-18 21:15:31,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 273. [2021-12-18 21:15:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 245 states have (on average 1.2693877551020407) internal successors, (311), 257 states have internal predecessors, (311), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2021-12-18 21:15:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 331 transitions. [2021-12-18 21:15:31,582 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 331 transitions. Word has length 47 [2021-12-18 21:15:31,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:15:31,582 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 331 transitions. [2021-12-18 21:15:31,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:15:31,582 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 331 transitions. [2021-12-18 21:15:31,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-18 21:15:31,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:15:31,583 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:15:31,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (72)] Ended with exit code 0 [2021-12-18 21:15:31,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:15:31,786 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:15:31,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:15:31,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1289498600, now seen corresponding path program 2 times [2021-12-18 21:15:31,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:15:31,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068525233] [2021-12-18 21:15:31,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:15:31,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:15:31,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:15:31,794 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:15:31,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-12-18 21:15:31,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:15:31,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:15:31,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-18 21:15:31,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:15:31,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 21:15:32,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:15:32,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 21:15:32,261 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-18 21:15:32,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 23 [2021-12-18 21:15:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:15:32,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:15:32,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:15:32,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 120 [2021-12-18 21:15:32,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-18 21:15:32,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-18 21:15:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:15:33,063 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:15:33,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068525233] [2021-12-18 21:15:33,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068525233] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:15:33,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:15:33,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-12-18 21:15:33,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207474340] [2021-12-18 21:15:33,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:15:33,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-18 21:15:33,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:15:33,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-18 21:15:33,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-12-18 21:15:33,064 INFO L87 Difference]: Start difference. First operand 273 states and 331 transitions. Second operand has 17 states, 16 states have (on average 4.5625) internal successors, (73), 17 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:15:33,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:15:33,750 INFO L93 Difference]: Finished difference Result 290 states and 346 transitions. [2021-12-18 21:15:33,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 21:15:33,751 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.5625) internal successors, (73), 17 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2021-12-18 21:15:33,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:15:33,752 INFO L225 Difference]: With dead ends: 290 [2021-12-18 21:15:33,752 INFO L226 Difference]: Without dead ends: 290 [2021-12-18 21:15:33,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-12-18 21:15:33,752 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 81 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:15:33,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 469 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 97 Invalid, 0 Unknown, 172 Unchecked, 0.2s Time] [2021-12-18 21:15:33,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-12-18 21:15:33,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 283. [2021-12-18 21:15:33,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 253 states have (on average 1.2648221343873518) internal successors, (320), 266 states have internal predecessors, (320), 7 states have call successors, (7), 5 states have call predecessors, (7), 9 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2021-12-18 21:15:33,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 340 transitions. [2021-12-18 21:15:33,755 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 340 transitions. Word has length 49 [2021-12-18 21:15:33,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:15:33,755 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 340 transitions. [2021-12-18 21:15:33,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.5625) internal successors, (73), 17 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:15:33,755 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 340 transitions. [2021-12-18 21:15:33,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 21:15:33,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:15:33,756 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1] [2021-12-18 21:15:33,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2021-12-18 21:15:33,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:15:33,964 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-18 21:15:33,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:15:33,964 INFO L85 PathProgramCache]: Analyzing trace with hash -660349958, now seen corresponding path program 2 times [2021-12-18 21:15:33,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:15:33,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175846093] [2021-12-18 21:15:33,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:15:33,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:15:33,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:15:33,976 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:15:33,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2021-12-18 21:15:34,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:15:34,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:15:34,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-18 21:15:34,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:15:34,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:15:34,296 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:15:34,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:15:34,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:15:36,454 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_54| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_56| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_56|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_54|) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_56|))) is different from true [2021-12-18 21:15:36,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:15:36,562 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-18 21:15:36,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-12-18 21:15:36,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-18 21:15:36,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:15:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 6 not checked. [2021-12-18 21:15:36,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:15:37,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:15:37,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 72 Killed by 15