./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test11.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 d286f1bc6bef2af97aa9bf8e95cd227fcca3bcb186ca467ee6b24a6fc8e433bc --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 21:03:58,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 21:03:58,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 21:03:58,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 21:03:58,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 21:03:58,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 21:03:58,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 21:03:58,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 21:03:58,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 21:03:58,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 21:03:58,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 21:03:58,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 21:03:58,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 21:03:58,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 21:03:58,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 21:03:58,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 21:03:58,396 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 21:03:58,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 21:03:58,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 21:03:58,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 21:03:58,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 21:03:58,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 21:03:58,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 21:03:58,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 21:03:58,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 21:03:58,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 21:03:58,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 21:03:58,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 21:03:58,419 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 21:03:58,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 21:03:58,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 21:03:58,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 21:03:58,422 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 21:03:58,423 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 21:03:58,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 21:03:58,424 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 21:03:58,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 21:03:58,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 21:03:58,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 21:03:58,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 21:03:58,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 21:03:58,427 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 21:03:58,456 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 21:03:58,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 21:03:58,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 21:03:58,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 21:03:58,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 21:03:58,458 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 21:03:58,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 21:03:58,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 21:03:58,459 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 21:03:58,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 21:03:58,460 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 21:03:58,460 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 21:03:58,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 21:03:58,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 21:03:58,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 21:03:58,461 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 21:03:58,461 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 21:03:58,461 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 21:03:58,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 21:03:58,461 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 21:03:58,462 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 21:03:58,462 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 21:03:58,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 21:03:58,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 21:03:58,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 21:03:58,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:03:58,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 21:03:58,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 21:03:58,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 21:03:58,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 21:03:58,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 21:03:58,464 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d286f1bc6bef2af97aa9bf8e95cd227fcca3bcb186ca467ee6b24a6fc8e433bc [2021-12-18 21:03:58,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 21:03:58,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 21:03:58,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 21:03:58,750 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 21:03:58,750 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 21:03:58,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test11.i [2021-12-18 21:03:58,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e0b2a8fd/49ddb371e2184961b3c2ecae91e397ce/FLAG3d577579d [2021-12-18 21:03:59,279 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 21:03:59,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test11.i [2021-12-18 21:03:59,308 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e0b2a8fd/49ddb371e2184961b3c2ecae91e397ce/FLAG3d577579d [2021-12-18 21:03:59,631 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e0b2a8fd/49ddb371e2184961b3c2ecae91e397ce [2021-12-18 21:03:59,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 21:03:59,635 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 21:03:59,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 21:03:59,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 21:03:59,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 21:03:59,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:03:59" (1/1) ... [2021-12-18 21:03:59,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35e008f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:03:59, skipping insertion in model container [2021-12-18 21:03:59,645 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:03:59" (1/1) ... [2021-12-18 21:03:59,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 21:03:59,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:04:00,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:04:00,123 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-18 21:04:00,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3e875fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:00, skipping insertion in model container [2021-12-18 21:04:00,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 21:04:00,125 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-18 21:04:00,128 INFO L158 Benchmark]: Toolchain (without parser) took 491.25ms. Allocated memory is still 88.1MB. Free memory was 58.4MB in the beginning and 44.5MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-18 21:04:00,128 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 88.1MB. Free memory is still 67.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 21:04:00,129 INFO L158 Benchmark]: CACSL2BoogieTranslator took 486.73ms. Allocated memory is still 88.1MB. Free memory was 58.2MB in the beginning and 44.6MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-18 21:04:00,131 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 88.1MB. Free memory is still 67.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 486.73ms. Allocated memory is still 88.1MB. Free memory was 58.2MB in the beginning and 44.6MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test11.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 d286f1bc6bef2af97aa9bf8e95cd227fcca3bcb186ca467ee6b24a6fc8e433bc --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 21:04:02,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 21:04:02,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 21:04:02,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 21:04:02,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 21:04:02,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 21:04:02,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 21:04:02,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 21:04:02,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 21:04:02,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 21:04:02,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 21:04:02,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 21:04:02,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 21:04:02,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 21:04:02,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 21:04:02,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 21:04:02,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 21:04:02,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 21:04:02,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 21:04:02,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 21:04:02,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 21:04:02,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 21:04:02,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 21:04:02,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 21:04:02,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 21:04:02,148 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 21:04:02,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 21:04:02,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 21:04:02,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 21:04:02,151 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 21:04:02,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 21:04:02,152 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 21:04:02,154 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 21:04:02,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 21:04:02,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 21:04:02,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 21:04:02,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 21:04:02,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 21:04:02,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 21:04:02,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 21:04:02,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 21:04:02,160 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-18 21:04:02,194 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 21:04:02,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 21:04:02,195 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 21:04:02,195 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 21:04:02,196 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 21:04:02,196 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 21:04:02,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 21:04:02,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 21:04:02,198 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 21:04:02,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 21:04:02,199 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 21:04:02,199 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 21:04:02,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 21:04:02,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 21:04:02,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 21:04:02,200 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 21:04:02,200 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 21:04:02,200 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 21:04:02,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 21:04:02,201 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 21:04:02,201 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-18 21:04:02,201 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-18 21:04:02,201 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 21:04:02,201 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 21:04:02,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 21:04:02,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 21:04:02,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 21:04:02,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:04:02,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 21:04:02,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 21:04:02,203 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-18 21:04:02,203 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-18 21:04:02,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 21:04:02,204 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-18 21:04:02,204 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d286f1bc6bef2af97aa9bf8e95cd227fcca3bcb186ca467ee6b24a6fc8e433bc [2021-12-18 21:04:02,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 21:04:02,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 21:04:02,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 21:04:02,518 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 21:04:02,519 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 21:04:02,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test11.i [2021-12-18 21:04:02,585 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f7fe2f25/a97fc996ff684da5a1d0e2d4ec4f9220/FLAG0e7b6d60c [2021-12-18 21:04:03,162 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 21:04:03,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test11.i [2021-12-18 21:04:03,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f7fe2f25/a97fc996ff684da5a1d0e2d4ec4f9220/FLAG0e7b6d60c [2021-12-18 21:04:03,444 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f7fe2f25/a97fc996ff684da5a1d0e2d4ec4f9220 [2021-12-18 21:04:03,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 21:04:03,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 21:04:03,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 21:04:03,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 21:04:03,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 21:04:03,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:04:03" (1/1) ... [2021-12-18 21:04:03,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c980ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:03, skipping insertion in model container [2021-12-18 21:04:03,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:04:03" (1/1) ... [2021-12-18 21:04:03,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 21:04:03,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:04:03,870 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:04:03,891 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-18 21:04:03,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:04:03,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:04:03,981 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 21:04:04,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:04:04,093 INFO L208 MainTranslator]: Completed translation [2021-12-18 21:04:04,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:04 WrapperNode [2021-12-18 21:04:04,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 21:04:04,095 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 21:04:04,095 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 21:04:04,095 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 21:04:04,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:04" (1/1) ... [2021-12-18 21:04:04,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:04" (1/1) ... [2021-12-18 21:04:04,160 INFO L137 Inliner]: procedures = 169, calls = 87, calls flagged for inlining = 26, calls inlined = 8, statements flattened = 92 [2021-12-18 21:04:04,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 21:04:04,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 21:04:04,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 21:04:04,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 21:04:04,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:04" (1/1) ... [2021-12-18 21:04:04,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:04" (1/1) ... [2021-12-18 21:04:04,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:04" (1/1) ... [2021-12-18 21:04:04,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:04" (1/1) ... [2021-12-18 21:04:04,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:04" (1/1) ... [2021-12-18 21:04:04,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:04" (1/1) ... [2021-12-18 21:04:04,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:04" (1/1) ... [2021-12-18 21:04:04,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 21:04:04,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 21:04:04,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 21:04:04,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 21:04:04,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:04" (1/1) ... [2021-12-18 21:04:04,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:04:04,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:04:04,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 21:04:04,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 21:04:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-18 21:04:04,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-18 21:04:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_i2c_set_clientdata [2021-12-18 21:04:04,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_i2c_set_clientdata [2021-12-18 21:04:04,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 21:04:04,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 21:04:04,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 21:04:04,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 21:04:04,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 21:04:04,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 21:04:04,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 21:04:04,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 21:04:04,447 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 21:04:04,449 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 21:04:04,807 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 21:04:04,817 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 21:04:04,818 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-18 21:04:04,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:04:04 BoogieIcfgContainer [2021-12-18 21:04:04,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 21:04:04,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 21:04:04,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 21:04:04,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 21:04:04,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 09:04:03" (1/3) ... [2021-12-18 21:04:04,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42334948 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:04:04, skipping insertion in model container [2021-12-18 21:04:04,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:04:04" (2/3) ... [2021-12-18 21:04:04,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42334948 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:04:04, skipping insertion in model container [2021-12-18 21:04:04,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:04:04" (3/3) ... [2021-12-18 21:04:04,835 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test11.i [2021-12-18 21:04:04,840 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 21:04:04,840 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2021-12-18 21:04:04,890 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 21:04:04,898 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 21:04:04,898 INFO L340 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2021-12-18 21:04:04,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 76 states have internal predecessors, (82), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:04:04,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 21:04:04,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:04,935 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:04,935 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:04:04,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:04,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1738627509, now seen corresponding path program 1 times [2021-12-18 21:04:04,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:04,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789534153] [2021-12-18 21:04:04,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:04,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:04,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:04,954 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:04,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-18 21:04:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:05,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:04:05,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:04:05,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:04:05,144 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:05,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789534153] [2021-12-18 21:04:05,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789534153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:04:05,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:04:05,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:04:05,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52895846] [2021-12-18 21:04:05,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:04:05,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:04:05,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:05,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:04:05,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:04:05,188 INFO L87 Difference]: Start difference. First operand has 85 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 76 states have internal predecessors, (82), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:04:05,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:05,316 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2021-12-18 21:04:05,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:04:05,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-18 21:04:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:05,328 INFO L225 Difference]: With dead ends: 157 [2021-12-18 21:04:05,328 INFO L226 Difference]: Without dead ends: 153 [2021-12-18 21:04:05,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:04:05,332 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 68 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:05,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 357 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:04:05,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-18 21:04:05,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 87. [2021-12-18 21:04:05,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 77 states have internal predecessors, (83), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-18 21:04:05,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2021-12-18 21:04:05,373 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 11 [2021-12-18 21:04:05,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:05,373 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2021-12-18 21:04:05,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:04:05,374 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2021-12-18 21:04:05,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 21:04:05,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:05,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:05,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:05,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:05,584 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:04:05,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:05,585 INFO L85 PathProgramCache]: Analyzing trace with hash -851123828, now seen corresponding path program 1 times [2021-12-18 21:04:05,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:05,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43769425] [2021-12-18 21:04:05,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:05,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:05,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:05,588 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:05,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-18 21:04:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:05,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:04:05,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:04:05,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:04:05,679 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:05,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43769425] [2021-12-18 21:04:05,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43769425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:04:05,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:04:05,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 21:04:05,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117372569] [2021-12-18 21:04:05,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:04:05,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:04:05,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:05,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:04:05,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:04:05,683 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:04:05,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:05,879 INFO L93 Difference]: Finished difference Result 153 states and 176 transitions. [2021-12-18 21:04:05,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 21:04:05,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-18 21:04:05,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:05,882 INFO L225 Difference]: With dead ends: 153 [2021-12-18 21:04:05,882 INFO L226 Difference]: Without dead ends: 151 [2021-12-18 21:04:05,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:04:05,883 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 66 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:05,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 304 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:04:05,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-18 21:04:05,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 83. [2021-12-18 21:04:05,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 74 states have internal predecessors, (79), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:04:05,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-12-18 21:04:05,895 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 11 [2021-12-18 21:04:05,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:05,896 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-12-18 21:04:05,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:04:05,896 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-12-18 21:04:05,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 21:04:05,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:05,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:05,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-18 21:04:06,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:06,106 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:04:06,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:06,107 INFO L85 PathProgramCache]: Analyzing trace with hash -470294884, now seen corresponding path program 1 times [2021-12-18 21:04:06,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:06,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884975129] [2021-12-18 21:04:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:06,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:06,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:06,109 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:06,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-18 21:04:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:06,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:04:06,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:04:06,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:04:06,232 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:06,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884975129] [2021-12-18 21:04:06,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884975129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:04:06,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:04:06,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:04:06,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135523386] [2021-12-18 21:04:06,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:04:06,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:04:06,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:06,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:04:06,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:04:06,235 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 21:04:06,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:06,303 INFO L93 Difference]: Finished difference Result 150 states and 170 transitions. [2021-12-18 21:04:06,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:04:06,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-12-18 21:04:06,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:06,305 INFO L225 Difference]: With dead ends: 150 [2021-12-18 21:04:06,305 INFO L226 Difference]: Without dead ends: 150 [2021-12-18 21:04:06,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:04:06,307 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 63 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:06,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 450 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:04:06,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-18 21:04:06,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 87. [2021-12-18 21:04:06,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.607843137254902) internal successors, (82), 77 states have internal predecessors, (82), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-18 21:04:06,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2021-12-18 21:04:06,316 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 17 [2021-12-18 21:04:06,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:06,317 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2021-12-18 21:04:06,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 21:04:06,317 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2021-12-18 21:04:06,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 21:04:06,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:06,318 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:06,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:06,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:06,527 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:04:06,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:06,527 INFO L85 PathProgramCache]: Analyzing trace with hash -470294895, now seen corresponding path program 1 times [2021-12-18 21:04:06,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:06,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205147230] [2021-12-18 21:04:06,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:06,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:06,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:06,529 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:06,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-18 21:04:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:06,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 21:04:06,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:06,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:04:06,786 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:04:06,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 21:04:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:04:06,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:04:09,124 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:09,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205147230] [2021-12-18 21:04:09,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205147230] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:04:09,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:04:09,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-12-18 21:04:09,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099015778] [2021-12-18 21:04:09,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:04:09,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:04:09,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:09,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:04:09,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=40, Unknown=1, NotChecked=0, Total=56 [2021-12-18 21:04:09,126 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:04:09,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:09,332 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2021-12-18 21:04:09,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:04:09,334 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 17 [2021-12-18 21:04:09,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:09,335 INFO L225 Difference]: With dead ends: 107 [2021-12-18 21:04:09,335 INFO L226 Difference]: Without dead ends: 107 [2021-12-18 21:04:09,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=20, Invalid=51, Unknown=1, NotChecked=0, Total=72 [2021-12-18 21:04:09,336 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 10 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:09,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 313 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2021-12-18 21:04:09,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-18 21:04:09,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2021-12-18 21:04:09,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 90 states have internal predecessors, (101), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-18 21:04:09,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2021-12-18 21:04:09,345 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 17 [2021-12-18 21:04:09,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:09,345 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2021-12-18 21:04:09,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:04:09,345 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2021-12-18 21:04:09,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 21:04:09,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:09,347 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:09,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:09,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:09,556 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:04:09,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:09,556 INFO L85 PathProgramCache]: Analyzing trace with hash -470294894, now seen corresponding path program 1 times [2021-12-18 21:04:09,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:09,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488357853] [2021-12-18 21:04:09,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:09,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:09,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:09,560 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:09,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-18 21:04:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:09,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 21:04:09,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:09,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:04:09,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:04:09,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:04:09,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:04:09,921 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:04:09,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:04:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:04:09,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:10,195 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:10,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488357853] [2021-12-18 21:04:10,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488357853] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:04:10,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1188611363] [2021-12-18 21:04:10,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:10,196 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:04:10,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:04:10,203 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:04:10,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-12-18 21:04:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:10,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 21:04:10,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:10,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:04:10,339 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 21:04:12,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:04:12,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:04:12,530 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:04:12,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:04:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:04:12,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:14,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1188611363] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:04:14,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:04:14,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-18 21:04:14,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591798384] [2021-12-18 21:04:14,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:04:14,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 21:04:14,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:14,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 21:04:14,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-18 21:04:14,789 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:04:15,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:15,400 INFO L93 Difference]: Finished difference Result 179 states and 200 transitions. [2021-12-18 21:04:15,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:04:15,400 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-12-18 21:04:15,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:15,401 INFO L225 Difference]: With dead ends: 179 [2021-12-18 21:04:15,402 INFO L226 Difference]: Without dead ends: 179 [2021-12-18 21:04:15,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-18 21:04:15,403 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 139 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:15,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 563 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 389 Invalid, 0 Unknown, 77 Unchecked, 0.5s Time] [2021-12-18 21:04:15,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-18 21:04:15,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 138. [2021-12-18 21:04:15,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 95 states have (on average 1.5894736842105264) internal successors, (151), 120 states have internal predecessors, (151), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-18 21:04:15,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 180 transitions. [2021-12-18 21:04:15,414 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 180 transitions. Word has length 17 [2021-12-18 21:04:15,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:15,414 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 180 transitions. [2021-12-18 21:04:15,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:04:15,414 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 180 transitions. [2021-12-18 21:04:15,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 21:04:15,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:15,415 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:15,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:15,623 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 21:04:15,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:15,818 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:04:15,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:15,818 INFO L85 PathProgramCache]: Analyzing trace with hash -763697902, now seen corresponding path program 1 times [2021-12-18 21:04:15,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:15,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543565768] [2021-12-18 21:04:15,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:15,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:15,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:15,820 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:15,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-18 21:04:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:15,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:04:15,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:04:15,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:04:15,933 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:15,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543565768] [2021-12-18 21:04:15,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543565768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:04:15,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:04:15,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:04:15,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721029600] [2021-12-18 21:04:15,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:04:15,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:04:15,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:15,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:04:15,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:04:15,935 INFO L87 Difference]: Start difference. First operand 138 states and 180 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:04:15,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:15,972 INFO L93 Difference]: Finished difference Result 129 states and 165 transitions. [2021-12-18 21:04:15,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:04:15,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-12-18 21:04:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:15,973 INFO L225 Difference]: With dead ends: 129 [2021-12-18 21:04:15,973 INFO L226 Difference]: Without dead ends: 127 [2021-12-18 21:04:15,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:04:15,975 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 0 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:15,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 358 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:04:15,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-18 21:04:15,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-18 21:04:15,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 88 states have (on average 1.6022727272727273) internal successors, (141), 112 states have internal predecessors, (141), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2021-12-18 21:04:15,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 163 transitions. [2021-12-18 21:04:15,982 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 163 transitions. Word has length 17 [2021-12-18 21:04:15,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:15,982 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 163 transitions. [2021-12-18 21:04:15,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:04:15,982 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 163 transitions. [2021-12-18 21:04:15,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 21:04:15,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:15,983 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:15,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:16,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:16,200 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:04:16,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:16,200 INFO L85 PathProgramCache]: Analyzing trace with hash -806735705, now seen corresponding path program 1 times [2021-12-18 21:04:16,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:16,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311073743] [2021-12-18 21:04:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:16,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:16,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:16,202 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:16,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-18 21:04:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:16,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 21:04:16,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:04:16,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:04:16,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:16,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311073743] [2021-12-18 21:04:16,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311073743] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:04:16,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:04:16,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-18 21:04:16,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823772490] [2021-12-18 21:04:16,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:04:16,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:04:16,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:16,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:04:16,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:04:16,550 INFO L87 Difference]: Start difference. First operand 127 states and 163 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:04:16,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:16,769 INFO L93 Difference]: Finished difference Result 126 states and 161 transitions. [2021-12-18 21:04:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 21:04:16,770 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 18 [2021-12-18 21:04:16,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:16,771 INFO L225 Difference]: With dead ends: 126 [2021-12-18 21:04:16,771 INFO L226 Difference]: Without dead ends: 126 [2021-12-18 21:04:16,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-18 21:04:16,772 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 138 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:16,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 274 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 113 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2021-12-18 21:04:16,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-18 21:04:16,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-12-18 21:04:16,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 88 states have (on average 1.5795454545454546) internal successors, (139), 111 states have internal predecessors, (139), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2021-12-18 21:04:16,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 161 transitions. [2021-12-18 21:04:16,778 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 161 transitions. Word has length 18 [2021-12-18 21:04:16,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:16,778 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 161 transitions. [2021-12-18 21:04:16,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:04:16,778 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 161 transitions. [2021-12-18 21:04:16,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 21:04:16,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:16,782 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:16,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:16,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:16,992 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:04:16,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:16,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1173731936, now seen corresponding path program 1 times [2021-12-18 21:04:16,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:16,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126600985] [2021-12-18 21:04:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:16,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:16,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:16,994 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:16,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-18 21:04:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:17,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 21:04:17,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:04:17,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:17,406 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:17,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126600985] [2021-12-18 21:04:17,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126600985] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:04:17,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [172626967] [2021-12-18 21:04:17,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:17,407 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:04:17,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:04:17,408 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:04:17,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-12-18 21:04:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:17,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 21:04:17,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:04:17,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:17,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [172626967] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:04:17,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:04:17,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-18 21:04:17,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644025717] [2021-12-18 21:04:17,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:04:17,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 21:04:17,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:17,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 21:04:17,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-18 21:04:17,845 INFO L87 Difference]: Start difference. First operand 126 states and 161 transitions. Second operand has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:04:18,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:18,028 INFO L93 Difference]: Finished difference Result 135 states and 168 transitions. [2021-12-18 21:04:18,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 21:04:18,029 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2021-12-18 21:04:18,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:18,030 INFO L225 Difference]: With dead ends: 135 [2021-12-18 21:04:18,030 INFO L226 Difference]: Without dead ends: 128 [2021-12-18 21:04:18,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-12-18 21:04:18,031 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 14 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:18,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 519 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 124 Invalid, 0 Unknown, 134 Unchecked, 0.1s Time] [2021-12-18 21:04:18,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-18 21:04:18,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2021-12-18 21:04:18,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 85 states have (on average 1.588235294117647) internal successors, (135), 108 states have internal predecessors, (135), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-18 21:04:18,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 156 transitions. [2021-12-18 21:04:18,037 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 156 transitions. Word has length 21 [2021-12-18 21:04:18,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:18,037 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 156 transitions. [2021-12-18 21:04:18,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:04:18,038 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 156 transitions. [2021-12-18 21:04:18,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 21:04:18,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:18,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:18,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:18,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:18,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:18,443 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:04:18,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:18,444 INFO L85 PathProgramCache]: Analyzing trace with hash -624729604, now seen corresponding path program 1 times [2021-12-18 21:04:18,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:18,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581072373] [2021-12-18 21:04:18,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:18,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:18,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:18,446 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:18,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-18 21:04:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:18,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 21:04:18,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:18,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:04:18,653 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 21:04:18,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2021-12-18 21:04:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:04:18,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:04:18,862 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:18,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581072373] [2021-12-18 21:04:18,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581072373] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:04:18,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:04:18,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-12-18 21:04:18,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47482328] [2021-12-18 21:04:18,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:04:18,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:04:18,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:18,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:04:18,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:04:18,865 INFO L87 Difference]: Start difference. First operand 123 states and 156 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:04:19,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:19,126 INFO L93 Difference]: Finished difference Result 178 states and 225 transitions. [2021-12-18 21:04:19,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:04:19,127 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2021-12-18 21:04:19,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:19,128 INFO L225 Difference]: With dead ends: 178 [2021-12-18 21:04:19,128 INFO L226 Difference]: Without dead ends: 178 [2021-12-18 21:04:19,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:04:19,129 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 52 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:19,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 457 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 0 Unknown, 116 Unchecked, 0.2s Time] [2021-12-18 21:04:19,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-18 21:04:19,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 141. [2021-12-18 21:04:19,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 101 states have (on average 1.5742574257425743) internal successors, (159), 123 states have internal predecessors, (159), 10 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (15), 13 states have call predecessors, (15), 10 states have call successors, (15) [2021-12-18 21:04:19,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 184 transitions. [2021-12-18 21:04:19,136 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 184 transitions. Word has length 25 [2021-12-18 21:04:19,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:19,136 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 184 transitions. [2021-12-18 21:04:19,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:04:19,136 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 184 transitions. [2021-12-18 21:04:19,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 21:04:19,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:19,137 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:19,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:19,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:19,346 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:04:19,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:19,347 INFO L85 PathProgramCache]: Analyzing trace with hash -624729603, now seen corresponding path program 1 times [2021-12-18 21:04:19,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:19,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882281743] [2021-12-18 21:04:19,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:19,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:19,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:19,348 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:19,350 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 21:04:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:19,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 21:04:19,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:19,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:04:23,635 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:04:23,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:04:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 21:04:23,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:23,897 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:23,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882281743] [2021-12-18 21:04:23,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882281743] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:04:23,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1727045983] [2021-12-18 21:04:23,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:23,897 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:04:23,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:04:23,898 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:04:23,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-12-18 21:04:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:24,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 21:04:24,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:24,039 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 21:04:24,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:04:30,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:04:30,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:04:30,332 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:04:30,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:04:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 21:04:30,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:32,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1727045983] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:04:32,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:04:32,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-12-18 21:04:32,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541784402] [2021-12-18 21:04:32,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:04:32,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 21:04:32,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:32,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 21:04:32,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=224, Unknown=5, NotChecked=0, Total=272 [2021-12-18 21:04:32,685 INFO L87 Difference]: Start difference. First operand 141 states and 184 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:04:37,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:37,491 INFO L93 Difference]: Finished difference Result 236 states and 304 transitions. [2021-12-18 21:04:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:04:37,491 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2021-12-18 21:04:37,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:37,492 INFO L225 Difference]: With dead ends: 236 [2021-12-18 21:04:37,493 INFO L226 Difference]: Without dead ends: 236 [2021-12-18 21:04:37,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=56, Invalid=279, Unknown=7, NotChecked=0, Total=342 [2021-12-18 21:04:37,493 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 83 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:37,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 843 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 450 Invalid, 0 Unknown, 146 Unchecked, 0.7s Time] [2021-12-18 21:04:37,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-18 21:04:37,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 195. [2021-12-18 21:04:37,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 149 states have (on average 1.5771812080536913) internal successors, (235), 171 states have internal predecessors, (235), 16 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (23), 19 states have call predecessors, (23), 16 states have call successors, (23) [2021-12-18 21:04:37,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 274 transitions. [2021-12-18 21:04:37,502 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 274 transitions. Word has length 25 [2021-12-18 21:04:37,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:37,502 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 274 transitions. [2021-12-18 21:04:37,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:04:37,502 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 274 transitions. [2021-12-18 21:04:37,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 21:04:37,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:37,505 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:37,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:37,714 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 21:04:37,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:37,908 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:04:37,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:37,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1130288229, now seen corresponding path program 1 times [2021-12-18 21:04:37,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:37,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194284801] [2021-12-18 21:04:37,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:37,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:37,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:37,910 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 21:04:37,911 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 21:04:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:37,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:04:37,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:04:38,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:04:38,045 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:38,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194284801] [2021-12-18 21:04:38,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194284801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:04:38,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:04:38,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:04:38,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700234127] [2021-12-18 21:04:38,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:04:38,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:04:38,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:38,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:04:38,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:04:38,047 INFO L87 Difference]: Start difference. First operand 195 states and 274 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:04:38,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:38,071 INFO L93 Difference]: Finished difference Result 152 states and 197 transitions. [2021-12-18 21:04:38,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:04:38,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-12-18 21:04:38,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:38,073 INFO L225 Difference]: With dead ends: 152 [2021-12-18 21:04:38,073 INFO L226 Difference]: Without dead ends: 148 [2021-12-18 21:04:38,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:04:38,074 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 0 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:38,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 339 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:04:38,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-18 21:04:38,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-12-18 21:04:38,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 110 states have (on average 1.5272727272727273) internal successors, (168), 130 states have internal predecessors, (168), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:04:38,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 193 transitions. [2021-12-18 21:04:38,078 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 193 transitions. Word has length 25 [2021-12-18 21:04:38,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:38,079 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 193 transitions. [2021-12-18 21:04:38,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:04:38,079 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 193 transitions. [2021-12-18 21:04:38,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-18 21:04:38,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:38,080 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:38,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:38,291 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 21:04:38,291 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:04:38,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:38,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2108218693, now seen corresponding path program 1 times [2021-12-18 21:04:38,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:38,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13086644] [2021-12-18 21:04:38,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:38,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:38,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:38,293 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 21:04:38,294 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 21:04:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:38,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:04:38,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:38,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:04:38,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:04:38,419 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:38,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13086644] [2021-12-18 21:04:38,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13086644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:04:38,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:04:38,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:04:38,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885702616] [2021-12-18 21:04:38,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:04:38,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:04:38,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:38,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:04:38,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:04:38,421 INFO L87 Difference]: Start difference. First operand 148 states and 193 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:04:38,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:38,473 INFO L93 Difference]: Finished difference Result 192 states and 235 transitions. [2021-12-18 21:04:38,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:04:38,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-12-18 21:04:38,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:38,475 INFO L225 Difference]: With dead ends: 192 [2021-12-18 21:04:38,475 INFO L226 Difference]: Without dead ends: 192 [2021-12-18 21:04:38,475 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 21:04:38,476 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 53 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:38,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 424 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:04:38,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-18 21:04:38,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 145. [2021-12-18 21:04:38,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 107 states have (on average 1.5233644859813085) internal successors, (163), 127 states have internal predecessors, (163), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:04:38,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 188 transitions. [2021-12-18 21:04:38,483 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 188 transitions. Word has length 26 [2021-12-18 21:04:38,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:38,483 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 188 transitions. [2021-12-18 21:04:38,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:04:38,484 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 188 transitions. [2021-12-18 21:04:38,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-18 21:04:38,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:38,487 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:38,497 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 21:04:38,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:38,688 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:04:38,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:38,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1299244922, now seen corresponding path program 1 times [2021-12-18 21:04:38,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:38,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629178863] [2021-12-18 21:04:38,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:38,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:38,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:38,689 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:04:38,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-18 21:04:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:38,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:04:38,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:04:39,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:04:39,248 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:39,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629178863] [2021-12-18 21:04:39,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629178863] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:04:39,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:04:39,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-18 21:04:39,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814715301] [2021-12-18 21:04:39,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:04:39,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:04:39,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:39,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:04:39,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:04:39,249 INFO L87 Difference]: Start difference. First operand 145 states and 188 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:04:39,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:39,335 INFO L93 Difference]: Finished difference Result 172 states and 208 transitions. [2021-12-18 21:04:39,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:04:39,336 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2021-12-18 21:04:39,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:39,337 INFO L225 Difference]: With dead ends: 172 [2021-12-18 21:04:39,337 INFO L226 Difference]: Without dead ends: 172 [2021-12-18 21:04:39,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:04:39,338 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 62 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:39,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 484 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2021-12-18 21:04:39,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-12-18 21:04:39,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 156. [2021-12-18 21:04:39,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 115 states have (on average 1.5043478260869565) internal successors, (173), 136 states have internal predecessors, (173), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:04:39,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 198 transitions. [2021-12-18 21:04:39,343 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 198 transitions. Word has length 26 [2021-12-18 21:04:39,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:39,343 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 198 transitions. [2021-12-18 21:04:39,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:04:39,343 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 198 transitions. [2021-12-18 21:04:39,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 21:04:39,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:39,344 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:39,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:39,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:39,544 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:04:39,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:39,545 INFO L85 PathProgramCache]: Analyzing trace with hash 930272189, now seen corresponding path program 1 times [2021-12-18 21:04:39,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:39,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778199390] [2021-12-18 21:04:39,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:39,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:39,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:39,546 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 21:04:39,547 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 21:04:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:39,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 21:04:39,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:39,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:04:39,742 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 21:04:39,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-12-18 21:04:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:04:39,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:04:39,775 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:39,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778199390] [2021-12-18 21:04:39,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778199390] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:04:39,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:04:39,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:04:39,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040028543] [2021-12-18 21:04:39,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:04:39,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:04:39,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:39,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:04:39,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:04:39,776 INFO L87 Difference]: Start difference. First operand 156 states and 198 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:04:39,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:39,993 INFO L93 Difference]: Finished difference Result 173 states and 210 transitions. [2021-12-18 21:04:39,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:04:39,994 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-12-18 21:04:39,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:39,995 INFO L225 Difference]: With dead ends: 173 [2021-12-18 21:04:39,995 INFO L226 Difference]: Without dead ends: 173 [2021-12-18 21:04:39,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:04:39,996 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 82 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:39,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 302 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 128 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2021-12-18 21:04:39,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-18 21:04:39,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 155. [2021-12-18 21:04:39,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 115 states have (on average 1.4869565217391305) internal successors, (171), 135 states have internal predecessors, (171), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:04:40,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 196 transitions. [2021-12-18 21:04:40,000 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 196 transitions. Word has length 27 [2021-12-18 21:04:40,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:40,000 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 196 transitions. [2021-12-18 21:04:40,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:04:40,001 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 196 transitions. [2021-12-18 21:04:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 21:04:40,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:40,001 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:40,016 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 21:04:40,214 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 21:04:40,214 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:04:40,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:40,214 INFO L85 PathProgramCache]: Analyzing trace with hash 930272190, now seen corresponding path program 1 times [2021-12-18 21:04:40,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:40,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880877752] [2021-12-18 21:04:40,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:40,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:40,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:40,216 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 21:04:40,217 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 21:04:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:40,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 21:04:40,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:40,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:04:40,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:04:42,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:04:42,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:04:42,550 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:04:42,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:04:42,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:04:42,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:04:42,691 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:04:42,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:04:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:04:42,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:43,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:43,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880877752] [2021-12-18 21:04:43,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880877752] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:04:43,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [11057329] [2021-12-18 21:04:43,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:43,050 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:04:43,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:04:43,051 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:04:43,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-12-18 21:04:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:43,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-18 21:04:43,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:43,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:04:43,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:04:43,323 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:04:43,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 21:04:43,338 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:04:43,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:04:45,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:04:45,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:04:45,504 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:04:45,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:04:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:04:45,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:47,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [11057329] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:04:47,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:04:47,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 11 [2021-12-18 21:04:47,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994134279] [2021-12-18 21:04:47,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:04:47,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 21:04:47,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:47,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 21:04:47,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=174, Unknown=1, NotChecked=0, Total=210 [2021-12-18 21:04:47,796 INFO L87 Difference]: Start difference. First operand 155 states and 196 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:04:50,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:04:50,583 INFO L93 Difference]: Finished difference Result 198 states and 217 transitions. [2021-12-18 21:04:50,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 21:04:50,584 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-12-18 21:04:50,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:04:50,585 INFO L225 Difference]: With dead ends: 198 [2021-12-18 21:04:50,585 INFO L226 Difference]: Without dead ends: 198 [2021-12-18 21:04:50,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=60, Invalid=280, Unknown=2, NotChecked=0, Total=342 [2021-12-18 21:04:50,592 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 170 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 21:04:50,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 656 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 504 Invalid, 0 Unknown, 66 Unchecked, 0.7s Time] [2021-12-18 21:04:50,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-18 21:04:50,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 126. [2021-12-18 21:04:50,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 90 states have (on average 1.4444444444444444) internal successors, (130), 109 states have internal predecessors, (130), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-18 21:04:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2021-12-18 21:04:50,597 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 27 [2021-12-18 21:04:50,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:04:50,597 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2021-12-18 21:04:50,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:04:50,598 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2021-12-18 21:04:50,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 21:04:50,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:04:50,598 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:04:50,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-12-18 21:04:50,808 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 21:04:51,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:04:51,002 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:04:51,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:04:51,002 INFO L85 PathProgramCache]: Analyzing trace with hash 638376382, now seen corresponding path program 1 times [2021-12-18 21:04:51,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:04:51,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688343219] [2021-12-18 21:04:51,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:51,003 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:04:51,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:04:51,004 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 21:04:51,005 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 21:04:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:51,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 21:04:51,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:51,169 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 21:04:51,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:04:51,342 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-18 21:04:51,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2021-12-18 21:04:51,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:04:51,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 48 [2021-12-18 21:04:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:04:51,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:51,904 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-12-18 21:04:51,905 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 69 treesize of output 68 [2021-12-18 21:04:51,993 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:04:51,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688343219] [2021-12-18 21:04:51,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688343219] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:04:51,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1999999064] [2021-12-18 21:04:51,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:04:51,994 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:04:51,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:04:51,996 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:04:52,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-12-18 21:04:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:04:52,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 21:04:52,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:04:52,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:04:52,413 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:04:52,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:04:52,496 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 21:04:54,541 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_16| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_16|) (_ bv0 32)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_16|))) is different from true [2021-12-18 21:04:54,648 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:04:54,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2021-12-18 21:04:54,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-12-18 21:04:54,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-12-18 21:04:54,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:04:54,807 INFO L354 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2021-12-18 21:04:54,807 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 23 treesize of output 22 [2021-12-18 21:04:54,814 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_247 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_247) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) is different from false [2021-12-18 21:04:54,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1999999064] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:04:54,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:04:54,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-12-18 21:04:54,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231098183] [2021-12-18 21:04:54,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:04:54,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-18 21:04:54,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:04:54,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-18 21:04:54,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=897, Unknown=2, NotChecked=122, Total=1122 [2021-12-18 21:04:54,833 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand has 28 states, 26 states have (on average 1.5) internal successors, (39), 23 states have internal predecessors, (39), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:05:06,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:05:06,582 INFO L93 Difference]: Finished difference Result 149 states and 163 transitions. [2021-12-18 21:05:06,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 21:05:06,583 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.5) internal successors, (39), 23 states have internal predecessors, (39), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2021-12-18 21:05:06,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:05:06,584 INFO L225 Difference]: With dead ends: 149 [2021-12-18 21:05:06,584 INFO L226 Difference]: Without dead ends: 149 [2021-12-18 21:05:06,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=305, Invalid=1954, Unknown=5, NotChecked=186, Total=2450 [2021-12-18 21:05:06,586 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 119 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 21:05:06,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 1061 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 917 Invalid, 0 Unknown, 101 Unchecked, 0.9s Time] [2021-12-18 21:05:06,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-18 21:05:06,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 128. [2021-12-18 21:05:06,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 93 states have (on average 1.4193548387096775) internal successors, (132), 111 states have internal predecessors, (132), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-18 21:05:06,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2021-12-18 21:05:06,590 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 29 [2021-12-18 21:05:06,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:05:06,590 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2021-12-18 21:05:06,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.5) internal successors, (39), 23 states have internal predecessors, (39), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:05:06,591 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2021-12-18 21:05:06,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 21:05:06,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:05:06,591 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:05:06,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-12-18 21:05:06,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-18 21:05:06,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:05:06,994 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:05:06,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:05:06,994 INFO L85 PathProgramCache]: Analyzing trace with hash 638376383, now seen corresponding path program 1 times [2021-12-18 21:05:06,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:05:06,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095494729] [2021-12-18 21:05:06,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:05:06,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:05:06,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:05:06,996 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:05:06,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-18 21:05:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:05:07,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 21:05:07,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:05:07,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:05:07,180 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:05:07,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:05:07,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:05:07,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:05:07,448 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:05:07,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2021-12-18 21:05:07,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-12-18 21:05:07,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-18 21:05:07,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-18 21:05:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:05:07,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:05:08,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:05:08,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 54 [2021-12-18 21:05:08,210 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_1 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_prenex_1) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) (or (forall ((v_ArrVal_272 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_272) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (forall ((v_ArrVal_271 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_271) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|) (_ bv4 32))))) (forall ((v_ArrVal_271 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_271) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|) (_ bv4 32)) (bvadd |c_ULTIMATE.start_entry_point_~cfg~1#1.offset| (_ bv4 32))))) is different from false [2021-12-18 21:05:08,299 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:05:08,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095494729] [2021-12-18 21:05:08,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095494729] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:05:08,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1701852923] [2021-12-18 21:05:08,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:05:08,299 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:05:08,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:05:08,304 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:05:08,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-12-18 21:05:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:05:08,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-18 21:05:08,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:05:08,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:05:08,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:05:10,802 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:05:10,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 21:05:10,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:05:10,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:05:11,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-18 21:05:11,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-18 21:05:15,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:05:15,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:05:15,446 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 21:05:15,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 25 [2021-12-18 21:05:15,666 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:05:15,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-12-18 21:05:15,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 21:05:15,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-18 21:05:15,844 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 21:05:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:05:15,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:05:16,060 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_300 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_300) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) (forall ((v_ArrVal_299 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_300 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_300) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|) (_ bv4 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_299) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))))) is different from false [2021-12-18 21:05:16,231 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_74| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_74|))) (and (forall ((v_ArrVal_300 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_300) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) (forall ((v_ArrVal_299 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_300 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_303 (_ BitVec 32))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_300) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|) (_ bv4 32)) (select (store |c_#length| |v_ldv_malloc_#res.base_74| v_ArrVal_303) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_299) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))))))) is different from false [2021-12-18 21:05:16,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1701852923] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:05:16,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:05:16,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-12-18 21:05:16,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121202223] [2021-12-18 21:05:16,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:05:16,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 21:05:16,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:05:16,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 21:05:16,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1013, Unknown=5, NotChecked=198, Total=1332 [2021-12-18 21:05:16,239 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand has 30 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 26 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:05:21,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:05:21,775 INFO L93 Difference]: Finished difference Result 155 states and 165 transitions. [2021-12-18 21:05:21,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 21:05:21,776 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 26 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2021-12-18 21:05:21,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:05:21,777 INFO L225 Difference]: With dead ends: 155 [2021-12-18 21:05:21,777 INFO L226 Difference]: Without dead ends: 155 [2021-12-18 21:05:21,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=253, Invalid=1733, Unknown=6, NotChecked=264, Total=2256 [2021-12-18 21:05:21,778 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 146 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 21:05:21,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 1335 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 764 Invalid, 0 Unknown, 176 Unchecked, 0.7s Time] [2021-12-18 21:05:21,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-18 21:05:21,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 127. [2021-12-18 21:05:21,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.4086021505376345) internal successors, (131), 110 states have internal predecessors, (131), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-18 21:05:21,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 149 transitions. [2021-12-18 21:05:21,783 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 149 transitions. Word has length 29 [2021-12-18 21:05:21,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:05:21,783 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 149 transitions. [2021-12-18 21:05:21,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 26 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:05:21,783 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 149 transitions. [2021-12-18 21:05:21,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 21:05:21,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:05:21,784 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:05:21,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-12-18 21:05:21,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-18 21:05:22,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:05:22,187 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:05:22,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:05:22,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1844886222, now seen corresponding path program 1 times [2021-12-18 21:05:22,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:05:22,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514474189] [2021-12-18 21:05:22,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:05:22,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:05:22,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:05:22,189 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:05:22,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-18 21:05:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:05:22,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 21:05:22,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:05:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:05:31,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:05:33,327 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:05:33,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514474189] [2021-12-18 21:05:33,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514474189] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:05:33,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2003328794] [2021-12-18 21:05:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:05:33,328 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:05:33,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:05:33,332 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:05:33,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-12-18 21:05:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:05:33,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 21:05:33,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:05:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:05:45,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:05:46,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2003328794] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:05:46,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:05:46,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-12-18 21:05:46,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128984673] [2021-12-18 21:05:46,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:05:46,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 21:05:46,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:05:46,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 21:05:46,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=539, Unknown=9, NotChecked=0, Total=650 [2021-12-18 21:05:46,329 INFO L87 Difference]: Start difference. First operand 127 states and 149 transitions. Second operand has 21 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:05:46,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:05:46,472 INFO L93 Difference]: Finished difference Result 130 states and 151 transitions. [2021-12-18 21:05:46,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 21:05:46,473 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32 [2021-12-18 21:05:46,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:05:46,474 INFO L225 Difference]: With dead ends: 130 [2021-12-18 21:05:46,474 INFO L226 Difference]: Without dead ends: 122 [2021-12-18 21:05:46,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=110, Invalid=637, Unknown=9, NotChecked=0, Total=756 [2021-12-18 21:05:46,474 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 14 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:05:46,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 421 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 188 Unchecked, 0.1s Time] [2021-12-18 21:05:46,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-18 21:05:46,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2021-12-18 21:05:46,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 101 states have internal predecessors, (121), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-18 21:05:46,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2021-12-18 21:05:46,478 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 32 [2021-12-18 21:05:46,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:05:46,478 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2021-12-18 21:05:46,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:05:46,479 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2021-12-18 21:05:46,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-18 21:05:46,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:05:46,479 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:05:46,486 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 21:05:46,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-12-18 21:05:46,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:05:46,883 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:05:46,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:05:46,884 INFO L85 PathProgramCache]: Analyzing trace with hash -316571990, now seen corresponding path program 1 times [2021-12-18 21:05:46,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:05:46,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398702020] [2021-12-18 21:05:46,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:05:46,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:05:46,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:05:46,885 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 21:05:46,887 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 21:05:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:05:46,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-18 21:05:46,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:05:47,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:05:47,059 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:05:47,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:05:47,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:05:47,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:05:49,139 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_16| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_26| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_26|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_16|) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_26|))) is different from true [2021-12-18 21:05:49,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:05:53,319 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-18 21:05:53,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-12-18 21:05:53,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-12-18 21:05:53,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-12-18 21:05:53,502 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 21:05:53,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2021-12-18 21:05:53,829 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 21:05:53,829 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 21:05:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2021-12-18 21:05:53,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:05:56,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 77 [2021-12-18 21:05:56,707 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_87| (_ BitVec 32)) (v_ArrVal_364 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base|) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset| |v_ldv_malloc_#res.base_87|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_364) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)) |v_ldv_malloc_#res.base_87|)) is different from false [2021-12-18 21:05:56,711 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:05:56,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398702020] [2021-12-18 21:05:56,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398702020] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:05:56,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1395605408] [2021-12-18 21:05:56,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:05:56,711 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:05:56,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:05:56,716 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:05:56,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-12-18 21:05:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:05:56,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-18 21:05:56,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:05:56,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:05:59,158 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:05:59,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:05:59,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:05:59,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:06:01,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:06:01,852 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-18 21:06:01,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-12-18 21:06:01,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 38 [2021-12-18 21:06:02,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-12-18 21:06:02,250 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 21:06:02,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2021-12-18 21:06:06,409 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:06:06,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 21:06:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:06:06,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:06:08,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 77 [2021-12-18 21:06:08,972 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_364 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ldv_malloc_#res.base_94| (_ BitVec 32))) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base|) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset| |v_ldv_malloc_#res.base_94|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_364) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)) |v_ldv_malloc_#res.base_94|)) is different from false [2021-12-18 21:06:08,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1395605408] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:06:08,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:06:08,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2021-12-18 21:06:08,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363013925] [2021-12-18 21:06:08,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:06:08,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-18 21:06:08,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:06:08,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-18 21:06:08,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1645, Unknown=32, NotChecked=252, Total=2070 [2021-12-18 21:06:08,977 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand has 37 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 31 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-18 21:06:24,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:06:24,375 INFO L93 Difference]: Finished difference Result 173 states and 211 transitions. [2021-12-18 21:06:24,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 21:06:24,375 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 31 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 38 [2021-12-18 21:06:24,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:06:24,376 INFO L225 Difference]: With dead ends: 173 [2021-12-18 21:06:24,376 INFO L226 Difference]: Without dead ends: 173 [2021-12-18 21:06:24,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=228, Invalid=2198, Unknown=36, NotChecked=294, Total=2756 [2021-12-18 21:06:24,377 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 48 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 21:06:24,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1057 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 899 Invalid, 0 Unknown, 372 Unchecked, 0.8s Time] [2021-12-18 21:06:24,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-18 21:06:24,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 134. [2021-12-18 21:06:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 99 states have (on average 1.4141414141414141) internal successors, (140), 115 states have internal predecessors, (140), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-18 21:06:24,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 161 transitions. [2021-12-18 21:06:24,382 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 161 transitions. Word has length 38 [2021-12-18 21:06:24,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:06:24,382 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 161 transitions. [2021-12-18 21:06:24,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 31 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-18 21:06:24,383 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 161 transitions. [2021-12-18 21:06:24,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-18 21:06:24,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:06:24,383 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:06:24,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-12-18 21:06:24,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-18 21:06:24,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:06:24,787 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:06:24,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:06:24,787 INFO L85 PathProgramCache]: Analyzing trace with hash -316571989, now seen corresponding path program 1 times [2021-12-18 21:06:24,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:06:24,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574975842] [2021-12-18 21:06:24,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:06:24,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:06:24,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:06:24,789 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:06:24,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-18 21:06:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:06:24,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 21:06:24,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:06:24,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:06:24,993 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:06:24,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:06:25,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:06:25,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:06:27,056 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_19| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_30| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_30|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_19|) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_30|))) is different from true [2021-12-18 21:06:29,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:06:29,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:06:31,350 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-18 21:06:31,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-18 21:06:31,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 51 [2021-12-18 21:06:31,641 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-18 21:06:31,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 46 [2021-12-18 21:06:31,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2021-12-18 21:06:33,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:06:33,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:06:33,962 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:06:33,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:06:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-18 21:06:34,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:06:40,419 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:06:40,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574975842] [2021-12-18 21:06:40,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574975842] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:06:40,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1405022610] [2021-12-18 21:06:40,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:06:40,419 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:06:40,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:06:40,420 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:06:40,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-12-18 21:06:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:06:40,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-18 21:06:40,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:06:40,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:06:40,839 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:06:40,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:06:40,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:06:40,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:06:43,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:06:43,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:06:43,814 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-18 21:06:43,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-18 21:06:43,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 54 [2021-12-18 21:06:44,376 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 21:06:44,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 46 [2021-12-18 21:06:44,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-12-18 21:06:44,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:06:44,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:06:44,548 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:06:44,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:06:44,562 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:06:44,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:06:48,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1405022610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:06:48,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:06:48,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 39 [2021-12-18 21:06:48,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627664435] [2021-12-18 21:06:48,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:06:48,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-18 21:06:48,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:06:48,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-18 21:06:48,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1509, Unknown=6, NotChecked=78, Total=1722 [2021-12-18 21:06:48,845 INFO L87 Difference]: Start difference. First operand 134 states and 161 transitions. Second operand has 40 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 32 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:06:52,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:06:52,830 INFO L93 Difference]: Finished difference Result 219 states and 263 transitions. [2021-12-18 21:06:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 21:06:52,830 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 32 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 38 [2021-12-18 21:06:52,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:06:52,831 INFO L225 Difference]: With dead ends: 219 [2021-12-18 21:06:52,832 INFO L226 Difference]: Without dead ends: 219 [2021-12-18 21:06:52,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=211, Invalid=2138, Unknown=7, NotChecked=94, Total=2450 [2021-12-18 21:06:52,833 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 96 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:06:52,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1493 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 855 Invalid, 0 Unknown, 418 Unchecked, 1.1s Time] [2021-12-18 21:06:52,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-18 21:06:52,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 134. [2021-12-18 21:06:52,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 99 states have (on average 1.393939393939394) internal successors, (138), 115 states have internal predecessors, (138), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-18 21:06:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 159 transitions. [2021-12-18 21:06:52,837 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 159 transitions. Word has length 38 [2021-12-18 21:06:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:06:52,837 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 159 transitions. [2021-12-18 21:06:52,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 32 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:06:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 159 transitions. [2021-12-18 21:06:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-18 21:06:52,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:06:52,838 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:06:52,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-12-18 21:06:53,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-12-18 21:06:53,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:06:53,239 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:06:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:06:53,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1161043861, now seen corresponding path program 1 times [2021-12-18 21:06:53,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:06:53,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383936165] [2021-12-18 21:06:53,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:06:53,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:06:53,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:06:53,241 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 21:06:53,243 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 21:06:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:06:53,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:06:53,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:06:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:06:53,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:06:53,410 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:06:53,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383936165] [2021-12-18 21:06:53,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383936165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:06:53,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:06:53,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:06:53,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192568533] [2021-12-18 21:06:53,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:06:53,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:06:53,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:06:53,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:06:53,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:06:53,411 INFO L87 Difference]: Start difference. First operand 134 states and 159 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:06:53,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:06:53,437 INFO L93 Difference]: Finished difference Result 119 states and 137 transitions. [2021-12-18 21:06:53,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:06:53,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2021-12-18 21:06:53,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:06:53,438 INFO L225 Difference]: With dead ends: 119 [2021-12-18 21:06:53,438 INFO L226 Difference]: Without dead ends: 115 [2021-12-18 21:06:53,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:06:53,439 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:06:53,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 308 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:06:53,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-18 21:06:53,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-12-18 21:06:53,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 84 states have (on average 1.380952380952381) internal successors, (116), 99 states have internal predecessors, (116), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-18 21:06:53,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2021-12-18 21:06:53,443 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 38 [2021-12-18 21:06:53,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:06:53,443 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2021-12-18 21:06:53,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:06:53,443 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2021-12-18 21:06:53,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 21:06:53,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:06:53,444 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:06:53,457 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 21:06:53,653 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 21:06:53,653 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_i2c_set_clientdataErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:06:53,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:06:53,653 INFO L85 PathProgramCache]: Analyzing trace with hash 717010680, now seen corresponding path program 1 times [2021-12-18 21:06:53,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:06:53,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462695671] [2021-12-18 21:06:53,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:06:53,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:06:53,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:06:53,655 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 21:06:53,658 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 21:06:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:06:53,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:06:53,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:06:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:06:53,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:06:53,806 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:06:53,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462695671] [2021-12-18 21:06:53,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462695671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:06:53,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:06:53,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:06:53,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908818417] [2021-12-18 21:06:53,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:06:53,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:06:53,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:06:53,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:06:53,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:06:53,808 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 21:06:53,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:06:53,827 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2021-12-18 21:06:53,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:06:53,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-12-18 21:06:53,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:06:53,829 INFO L225 Difference]: With dead ends: 129 [2021-12-18 21:06:53,829 INFO L226 Difference]: Without dead ends: 129 [2021-12-18 21:06:53,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:06:53,830 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 38 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:06:53,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 395 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:06:53,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-18 21:06:53,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 113. [2021-12-18 21:06:53,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 83 states have (on average 1.3734939759036144) internal successors, (114), 98 states have internal predecessors, (114), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:06:53,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2021-12-18 21:06:53,833 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 40 [2021-12-18 21:06:53,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:06:53,834 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2021-12-18 21:06:53,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 21:06:53,834 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2021-12-18 21:06:53,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 21:06:53,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:06:53,835 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:06:53,848 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 21:06:54,045 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 21:06:54,046 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_i2c_set_clientdataErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:06:54,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:06:54,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1835146281, now seen corresponding path program 1 times [2021-12-18 21:06:54,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:06:54,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647218715] [2021-12-18 21:06:54,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:06:54,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:06:54,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:06:54,047 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 21:06:54,048 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 21:06:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:06:54,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 21:06:54,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:06:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:06:54,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:06:54,210 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:06:54,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647218715] [2021-12-18 21:06:54,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647218715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:06:54,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:06:54,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:06:54,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059565565] [2021-12-18 21:06:54,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:06:54,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:06:54,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:06:54,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:06:54,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:06:54,211 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:06:54,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:06:54,396 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2021-12-18 21:06:54,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:06:54,397 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2021-12-18 21:06:54,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:06:54,398 INFO L225 Difference]: With dead ends: 126 [2021-12-18 21:06:54,398 INFO L226 Difference]: Without dead ends: 126 [2021-12-18 21:06:54,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:06:54,398 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 46 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:06:54,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 265 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:06:54,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-18 21:06:54,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 113. [2021-12-18 21:06:54,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 83 states have (on average 1.3614457831325302) internal successors, (113), 98 states have internal predecessors, (113), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:06:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 128 transitions. [2021-12-18 21:06:54,402 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 128 transitions. Word has length 40 [2021-12-18 21:06:54,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:06:54,402 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 128 transitions. [2021-12-18 21:06:54,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:06:54,403 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 128 transitions. [2021-12-18 21:06:54,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 21:06:54,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:06:54,403 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:06:54,413 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 21:06:54,612 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 21:06:54,612 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_i2c_set_clientdataErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:06:54,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:06:54,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1835146280, now seen corresponding path program 1 times [2021-12-18 21:06:54,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:06:54,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455078151] [2021-12-18 21:06:54,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:06:54,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:06:54,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:06:54,614 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 21:06:54,615 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 21:06:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:06:54,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-18 21:06:54,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:06:54,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:06:54,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:06:56,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:06:56,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:06:56,922 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:06:56,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:06:59,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:06:59,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:06:59,051 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:06:59,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:06:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:06:59,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:02,089 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:02,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455078151] [2021-12-18 21:07:02,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455078151] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:07:02,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [856730505] [2021-12-18 21:07:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:02,090 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:07:02,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:07:02,090 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:07:02,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-12-18 21:07:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:02,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-18 21:07:02,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:02,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:02,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:02,429 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:02,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:07:02,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:07:04,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:07:04,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:07:04,601 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:04,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:07:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:07:04,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:08,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [856730505] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:07:08,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:07:08,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 14 [2021-12-18 21:07:08,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135740245] [2021-12-18 21:07:08,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:07:08,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 21:07:08,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:08,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 21:07:08,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=366, Unknown=2, NotChecked=0, Total=420 [2021-12-18 21:07:08,417 INFO L87 Difference]: Start difference. First operand 113 states and 128 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:07:09,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:09,022 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2021-12-18 21:07:09,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 21:07:09,022 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2021-12-18 21:07:09,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:09,023 INFO L225 Difference]: With dead ends: 129 [2021-12-18 21:07:09,023 INFO L226 Difference]: Without dead ends: 129 [2021-12-18 21:07:09,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=87, Invalid=561, Unknown=2, NotChecked=0, Total=650 [2021-12-18 21:07:09,024 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 115 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:09,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 582 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 354 Invalid, 0 Unknown, 88 Unchecked, 0.4s Time] [2021-12-18 21:07:09,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-18 21:07:09,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 113. [2021-12-18 21:07:09,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 83 states have (on average 1.3493975903614457) internal successors, (112), 98 states have internal predecessors, (112), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:07:09,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 127 transitions. [2021-12-18 21:07:09,028 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 127 transitions. Word has length 40 [2021-12-18 21:07:09,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:09,028 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 127 transitions. [2021-12-18 21:07:09,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:07:09,028 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 127 transitions. [2021-12-18 21:07:09,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 21:07:09,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:09,029 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:09,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:09,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:09,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:07:09,439 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_i2c_set_clientdataErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:07:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:09,440 INFO L85 PathProgramCache]: Analyzing trace with hash 752121782, now seen corresponding path program 1 times [2021-12-18 21:07:09,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:09,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659220754] [2021-12-18 21:07:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:09,440 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:09,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:09,441 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:07:09,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-18 21:07:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:09,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 21:07:09,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:09,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:09,672 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 21:07:09,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-12-18 21:07:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:07:09,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:07:09,711 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:09,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659220754] [2021-12-18 21:07:09,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659220754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:07:09,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:07:09,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:07:09,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099123788] [2021-12-18 21:07:09,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:07:09,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 21:07:09,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:09,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 21:07:09,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:07:09,712 INFO L87 Difference]: Start difference. First operand 113 states and 127 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:07:09,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:09,877 INFO L93 Difference]: Finished difference Result 123 states and 140 transitions. [2021-12-18 21:07:09,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:07:09,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2021-12-18 21:07:09,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:09,878 INFO L225 Difference]: With dead ends: 123 [2021-12-18 21:07:09,878 INFO L226 Difference]: Without dead ends: 123 [2021-12-18 21:07:09,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:07:09,879 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 44 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:09,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 259 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 107 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2021-12-18 21:07:09,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-18 21:07:09,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2021-12-18 21:07:09,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 83 states have (on average 1.3373493975903614) internal successors, (111), 97 states have internal predecessors, (111), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:07:09,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2021-12-18 21:07:09,882 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 41 [2021-12-18 21:07:09,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:09,883 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2021-12-18 21:07:09,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:07:09,883 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2021-12-18 21:07:09,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 21:07:09,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:09,883 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:09,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:10,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:07:10,094 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_i2c_set_clientdataErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:07:10,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:10,094 INFO L85 PathProgramCache]: Analyzing trace with hash 752121783, now seen corresponding path program 1 times [2021-12-18 21:07:10,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:10,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431060321] [2021-12-18 21:07:10,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:10,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:10,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:10,095 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:07:10,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-18 21:07:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:10,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-18 21:07:10,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:10,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:10,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:10,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:07:10,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:07:10,410 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:10,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:07:12,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:07:12,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:07:12,527 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:12,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:07:12,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:07:12,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:07:12,687 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:12,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:07:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:07:12,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:13,327 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:13,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431060321] [2021-12-18 21:07:13,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431060321] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:07:13,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [277793225] [2021-12-18 21:07:13,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:13,328 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:07:13,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:07:13,329 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:07:13,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-12-18 21:07:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:13,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-18 21:07:13,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:13,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:13,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:13,684 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:13,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:07:13,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:07:15,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:07:15,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:07:15,849 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:15,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:07:17,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:07:17,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:07:17,997 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:17,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:07:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:07:18,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:20,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [277793225] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:07:20,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:07:20,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 14 [2021-12-18 21:07:20,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191757630] [2021-12-18 21:07:20,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:07:20,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 21:07:20,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:20,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 21:07:20,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-12-18 21:07:20,341 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:07:22,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:22,909 INFO L93 Difference]: Finished difference Result 134 states and 137 transitions. [2021-12-18 21:07:22,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 21:07:22,911 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2021-12-18 21:07:22,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:22,911 INFO L225 Difference]: With dead ends: 134 [2021-12-18 21:07:22,911 INFO L226 Difference]: Without dead ends: 134 [2021-12-18 21:07:22,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=80, Invalid=519, Unknown=1, NotChecked=0, Total=600 [2021-12-18 21:07:22,912 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 166 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:22,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 463 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 368 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2021-12-18 21:07:22,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-18 21:07:22,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2021-12-18 21:07:22,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 83 states have (on average 1.3253012048192772) internal successors, (110), 96 states have internal predecessors, (110), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:07:22,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2021-12-18 21:07:22,915 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 41 [2021-12-18 21:07:22,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:22,915 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2021-12-18 21:07:22,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:07:22,916 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2021-12-18 21:07:22,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 21:07:22,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:22,916 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:22,926 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 21:07:23,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:23,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:07:23,323 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:07:23,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:23,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1833421355, now seen corresponding path program 1 times [2021-12-18 21:07:23,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:23,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662973528] [2021-12-18 21:07:23,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:23,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:23,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:23,326 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:07:23,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-12-18 21:07:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:23,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-18 21:07:23,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:07:23,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:24,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:07:24,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2021-12-18 21:07:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:07:24,508 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:24,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662973528] [2021-12-18 21:07:24,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662973528] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:07:24,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:07:24,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-18 21:07:24,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813078069] [2021-12-18 21:07:24,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:07:24,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-18 21:07:24,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:24,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-18 21:07:24,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-12-18 21:07:24,510 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-18 21:07:25,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:25,003 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2021-12-18 21:07:25,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 21:07:25,003 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) Word has length 46 [2021-12-18 21:07:25,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:25,007 INFO L225 Difference]: With dead ends: 109 [2021-12-18 21:07:25,007 INFO L226 Difference]: Without dead ends: 109 [2021-12-18 21:07:25,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-12-18 21:07:25,008 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 158 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:25,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 424 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 21:07:25,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-18 21:07:25,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2021-12-18 21:07:25,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 80 states have (on average 1.275) internal successors, (102), 91 states have internal predecessors, (102), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:07:25,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2021-12-18 21:07:25,010 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 46 [2021-12-18 21:07:25,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:25,010 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2021-12-18 21:07:25,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-18 21:07:25,010 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2021-12-18 21:07:25,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 21:07:25,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:25,010 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:25,018 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 21:07:25,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:07:25,215 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:07:25,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:25,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1833421356, now seen corresponding path program 1 times [2021-12-18 21:07:25,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:25,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6970142] [2021-12-18 21:07:25,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:25,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:25,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:25,217 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:07:25,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-12-18 21:07:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:25,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 21:07:25,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:07:25,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:07:25,419 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:25,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6970142] [2021-12-18 21:07:25,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6970142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:07:25,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:07:25,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:07:25,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985843823] [2021-12-18 21:07:25,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:07:25,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 21:07:25,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:25,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 21:07:25,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:07:25,420 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:07:25,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:25,621 INFO L93 Difference]: Finished difference Result 166 states and 172 transitions. [2021-12-18 21:07:25,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 21:07:25,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2021-12-18 21:07:25,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:25,622 INFO L225 Difference]: With dead ends: 166 [2021-12-18 21:07:25,622 INFO L226 Difference]: Without dead ends: 166 [2021-12-18 21:07:25,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-12-18 21:07:25,622 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 109 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:25,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 369 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 158 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2021-12-18 21:07:25,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-18 21:07:25,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 111. [2021-12-18 21:07:25,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 84 states have (on average 1.25) internal successors, (105), 95 states have internal predecessors, (105), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:07:25,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 120 transitions. [2021-12-18 21:07:25,625 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 120 transitions. Word has length 46 [2021-12-18 21:07:25,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:25,625 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 120 transitions. [2021-12-18 21:07:25,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:07:25,626 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 120 transitions. [2021-12-18 21:07:25,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-18 21:07:25,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:25,634 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:25,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:25,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:07:25,835 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:07:25,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:25,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1963012722, now seen corresponding path program 1 times [2021-12-18 21:07:25,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:25,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847699975] [2021-12-18 21:07:25,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:25,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:25,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:25,837 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:07:25,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-12-18 21:07:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:25,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 21:07:25,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 21:07:26,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:07:26,037 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:26,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847699975] [2021-12-18 21:07:26,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847699975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:07:26,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:07:26,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:07:26,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995367138] [2021-12-18 21:07:26,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:07:26,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 21:07:26,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:26,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 21:07:26,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:07:26,039 INFO L87 Difference]: Start difference. First operand 111 states and 120 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:07:26,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:26,178 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2021-12-18 21:07:26,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:07:26,179 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2021-12-18 21:07:26,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:26,179 INFO L225 Difference]: With dead ends: 121 [2021-12-18 21:07:26,179 INFO L226 Difference]: Without dead ends: 121 [2021-12-18 21:07:26,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:07:26,180 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 82 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:26,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 246 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:07:26,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-18 21:07:26,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2021-12-18 21:07:26,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 84 states have (on average 1.2380952380952381) internal successors, (104), 94 states have internal predecessors, (104), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:07:26,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 119 transitions. [2021-12-18 21:07:26,183 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 119 transitions. Word has length 47 [2021-12-18 21:07:26,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:26,184 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 119 transitions. [2021-12-18 21:07:26,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:07:26,184 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 119 transitions. [2021-12-18 21:07:26,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 21:07:26,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:26,185 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:26,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:26,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:07:26,392 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:07:26,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:26,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1021505201, now seen corresponding path program 1 times [2021-12-18 21:07:26,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:26,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626437142] [2021-12-18 21:07:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:26,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:26,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:26,393 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:07:26,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-12-18 21:07:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:26,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 21:07:26,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:26,670 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 21:07:26,675 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 21:07:26,773 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 21:07:26,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:07:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:07:26,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:27,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-12-18 21:07:27,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:07:27,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:07:27,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-12-18 21:07:27,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:07:27,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:07:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 21:07:27,533 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:27,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626437142] [2021-12-18 21:07:27,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626437142] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-18 21:07:27,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 21:07:27,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 19 [2021-12-18 21:07:27,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214082510] [2021-12-18 21:07:27,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:07:27,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 21:07:27,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:27,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 21:07:27,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-12-18 21:07:27,534 INFO L87 Difference]: Start difference. First operand 110 states and 119 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:07:28,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:28,092 INFO L93 Difference]: Finished difference Result 160 states and 170 transitions. [2021-12-18 21:07:28,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 21:07:28,093 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2021-12-18 21:07:28,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:28,093 INFO L225 Difference]: With dead ends: 160 [2021-12-18 21:07:28,093 INFO L226 Difference]: Without dead ends: 160 [2021-12-18 21:07:28,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-12-18 21:07:28,094 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 205 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:28,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 526 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:07:28,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-18 21:07:28,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 116. [2021-12-18 21:07:28,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 90 states have (on average 1.2222222222222223) internal successors, (110), 100 states have internal predecessors, (110), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:07:28,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2021-12-18 21:07:28,097 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 51 [2021-12-18 21:07:28,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:28,098 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2021-12-18 21:07:28,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:07:28,098 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2021-12-18 21:07:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 21:07:28,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:28,099 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:28,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:28,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:07:28,299 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:07:28,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:28,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1703598893, now seen corresponding path program 1 times [2021-12-18 21:07:28,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:28,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185877122] [2021-12-18 21:07:28,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:28,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:28,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:28,301 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:07:28,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-12-18 21:07:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:28,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-18 21:07:28,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:28,642 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 21:07:28,718 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 21:07:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-18 21:07:28,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:29,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-12-18 21:07:29,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-12-18 21:07:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:07:29,309 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:29,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185877122] [2021-12-18 21:07:29,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185877122] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-18 21:07:29,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 21:07:29,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15] total 22 [2021-12-18 21:07:29,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368179851] [2021-12-18 21:07:29,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:07:29,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 21:07:29,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:29,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 21:07:29,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-12-18 21:07:29,310 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:07:29,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:29,813 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2021-12-18 21:07:29,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 21:07:29,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2021-12-18 21:07:29,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:29,814 INFO L225 Difference]: With dead ends: 115 [2021-12-18 21:07:29,814 INFO L226 Difference]: Without dead ends: 115 [2021-12-18 21:07:29,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-12-18 21:07:29,815 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 178 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:29,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 486 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:07:29,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-18 21:07:29,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-12-18 21:07:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 90 states have (on average 1.2) internal successors, (108), 99 states have internal predecessors, (108), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:07:29,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 123 transitions. [2021-12-18 21:07:29,818 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 123 transitions. Word has length 52 [2021-12-18 21:07:29,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:29,819 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 123 transitions. [2021-12-18 21:07:29,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:07:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 123 transitions. [2021-12-18 21:07:29,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 21:07:29,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:29,820 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:29,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:30,029 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 21:07:30,030 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:07:30,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:30,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1601898209, now seen corresponding path program 1 times [2021-12-18 21:07:30,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:30,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822380218] [2021-12-18 21:07:30,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:30,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:30,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:30,031 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 21:07:30,032 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 21:07:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:30,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:07:30,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:07:30,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:07:30,320 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:30,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822380218] [2021-12-18 21:07:30,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1822380218] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:07:30,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:07:30,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-12-18 21:07:30,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807317967] [2021-12-18 21:07:30,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:07:30,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:07:30,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:30,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:07:30,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:07:30,322 INFO L87 Difference]: Start difference. First operand 115 states and 123 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:07:30,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:30,340 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2021-12-18 21:07:30,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:07:30,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2021-12-18 21:07:30,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:30,340 INFO L225 Difference]: With dead ends: 114 [2021-12-18 21:07:30,341 INFO L226 Difference]: Without dead ends: 114 [2021-12-18 21:07:30,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:07:30,342 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 26 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:30,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 219 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:07:30,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-18 21:07:30,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-12-18 21:07:30,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 98 states have internal predecessors, (106), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:07:30,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2021-12-18 21:07:30,346 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 52 [2021-12-18 21:07:30,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:30,347 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2021-12-18 21:07:30,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:07:30,347 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2021-12-18 21:07:30,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-18 21:07:30,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:30,348 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:30,360 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 21:07:30,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:07:30,558 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:07:30,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:30,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1271958025, now seen corresponding path program 1 times [2021-12-18 21:07:30,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:30,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1902944005] [2021-12-18 21:07:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:30,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:30,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:30,560 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:07:30,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-12-18 21:07:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:30,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-18 21:07:30,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:31,376 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 21:07:31,559 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 21:07:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:07:31,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:32,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-12-18 21:07:32,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-12-18 21:07:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:07:32,650 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:32,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1902944005] [2021-12-18 21:07:32,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1902944005] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-18 21:07:32,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 21:07:32,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [17] total 30 [2021-12-18 21:07:32,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075892845] [2021-12-18 21:07:32,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:07:32,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 21:07:32,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:32,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 21:07:32,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-12-18 21:07:32,652 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:07:34,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:34,114 INFO L93 Difference]: Finished difference Result 146 states and 147 transitions. [2021-12-18 21:07:34,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 21:07:34,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2021-12-18 21:07:34,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:34,115 INFO L225 Difference]: With dead ends: 146 [2021-12-18 21:07:34,115 INFO L226 Difference]: Without dead ends: 146 [2021-12-18 21:07:34,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 21:07:34,116 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 223 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:34,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 556 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-18 21:07:34,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-18 21:07:34,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 114. [2021-12-18 21:07:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 90 states have (on average 1.1666666666666667) internal successors, (105), 98 states have internal predecessors, (105), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:07:34,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 120 transitions. [2021-12-18 21:07:34,119 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 120 transitions. Word has length 53 [2021-12-18 21:07:34,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:34,119 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 120 transitions. [2021-12-18 21:07:34,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:07:34,119 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 120 transitions. [2021-12-18 21:07:34,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-18 21:07:34,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:34,120 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:34,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:34,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:07:34,320 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:07:34,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:34,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1880762957, now seen corresponding path program 1 times [2021-12-18 21:07:34,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:34,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384478398] [2021-12-18 21:07:34,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:34,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:34,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:34,322 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 21:07:34,323 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 21:07:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:34,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:07:34,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:07:34,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:07:35,132 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:35,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384478398] [2021-12-18 21:07:35,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384478398] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:07:35,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:07:35,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-18 21:07:35,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039156851] [2021-12-18 21:07:35,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:07:35,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:07:35,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:35,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:07:35,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:07:35,134 INFO L87 Difference]: Start difference. First operand 114 states and 120 transitions. Second operand has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-18 21:07:35,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:35,176 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2021-12-18 21:07:35,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:07:35,177 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 53 [2021-12-18 21:07:35,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:35,177 INFO L225 Difference]: With dead ends: 124 [2021-12-18 21:07:35,177 INFO L226 Difference]: Without dead ends: 124 [2021-12-18 21:07:35,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:07:35,178 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 64 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:35,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 214 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 33 Unchecked, 0.0s Time] [2021-12-18 21:07:35,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-18 21:07:35,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 117. [2021-12-18 21:07:35,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 93 states have (on average 1.1612903225806452) internal successors, (108), 101 states have internal predecessors, (108), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:07:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2021-12-18 21:07:35,180 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 53 [2021-12-18 21:07:35,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:35,181 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2021-12-18 21:07:35,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-18 21:07:35,181 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2021-12-18 21:07:35,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-18 21:07:35,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:35,181 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:35,191 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 21:07:35,382 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 21:07:35,382 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:07:35,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:35,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1060607112, now seen corresponding path program 1 times [2021-12-18 21:07:35,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:35,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447604328] [2021-12-18 21:07:35,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:35,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:35,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:35,384 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 21:07:35,385 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 21:07:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:35,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:07:35,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:07:35,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:07:35,588 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:35,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447604328] [2021-12-18 21:07:35,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447604328] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:07:35,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:07:35,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:07:35,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155878643] [2021-12-18 21:07:35,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:07:35,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:07:35,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:35,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:07:35,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:07:35,589 INFO L87 Difference]: Start difference. First operand 117 states and 123 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:07:35,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:35,605 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-12-18 21:07:35,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:07:35,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2021-12-18 21:07:35,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:35,607 INFO L225 Difference]: With dead ends: 108 [2021-12-18 21:07:35,607 INFO L226 Difference]: Without dead ends: 108 [2021-12-18 21:07:35,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:07:35,607 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 24 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:35,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 272 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:07:35,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-18 21:07:35,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 96. [2021-12-18 21:07:35,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 82 states have internal predecessors, (85), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:07:35,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-12-18 21:07:35,609 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 53 [2021-12-18 21:07:35,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:35,609 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-12-18 21:07:35,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:07:35,610 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-12-18 21:07:35,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 21:07:35,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:35,610 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:35,618 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 21:07:35,815 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 21:07:35,815 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:07:35,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:35,816 INFO L85 PathProgramCache]: Analyzing trace with hash -775746731, now seen corresponding path program 1 times [2021-12-18 21:07:35,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:35,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475936920] [2021-12-18 21:07:35,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:35,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:35,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:35,817 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 21:07:35,818 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 21:07:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:35,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-18 21:07:35,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:36,140 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 21:07:36,227 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 21:07:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 21:07:36,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:36,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-18 21:07:36,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-18 21:07:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:07:36,825 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:36,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475936920] [2021-12-18 21:07:36,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475936920] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-18 21:07:36,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 21:07:36,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [17] total 24 [2021-12-18 21:07:36,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116751533] [2021-12-18 21:07:36,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:07:36,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 21:07:36,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:36,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 21:07:36,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-12-18 21:07:36,826 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:07:37,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:37,527 INFO L93 Difference]: Finished difference Result 108 states and 107 transitions. [2021-12-18 21:07:37,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 21:07:37,528 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2021-12-18 21:07:37,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:37,529 INFO L225 Difference]: With dead ends: 108 [2021-12-18 21:07:37,529 INFO L226 Difference]: Without dead ends: 108 [2021-12-18 21:07:37,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-12-18 21:07:37,530 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 183 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:37,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 637 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 21:07:37,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-18 21:07:37,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 96. [2021-12-18 21:07:37,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 75 states have (on average 1.12) internal successors, (84), 82 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:07:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-12-18 21:07:37,532 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 54 [2021-12-18 21:07:37,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:37,532 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-12-18 21:07:37,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:07:37,532 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-12-18 21:07:37,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 21:07:37,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:37,533 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:37,546 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 21:07:37,733 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 21:07:37,734 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:07:37,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:37,734 INFO L85 PathProgramCache]: Analyzing trace with hash -775993003, now seen corresponding path program 1 times [2021-12-18 21:07:37,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:37,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566683833] [2021-12-18 21:07:37,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:37,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:37,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:37,735 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 21:07:37,736 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 21:07:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:37,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-18 21:07:37,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:37,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:38,117 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 21:07:38,241 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 21:07:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 21:07:38,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:38,574 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 48 treesize of output 42 [2021-12-18 21:07:38,684 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:38,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566683833] [2021-12-18 21:07:38,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566683833] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:07:38,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [152755559] [2021-12-18 21:07:38,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:38,685 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:07:38,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:07:38,687 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 21:07:38,703 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 21:07:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:38,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-18 21:07:38,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:39,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:39,124 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 21:07:39,165 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 20 treesize of output 12 [2021-12-18 21:07:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 21:07:39,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:39,374 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 48 treesize of output 42 [2021-12-18 21:07:39,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [152755559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:07:39,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:07:39,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-12-18 21:07:39,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384906432] [2021-12-18 21:07:39,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:07:39,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 21:07:39,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:39,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 21:07:39,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-12-18 21:07:39,425 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 21:07:39,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:39,918 INFO L93 Difference]: Finished difference Result 107 states and 106 transitions. [2021-12-18 21:07:39,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 21:07:39,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 54 [2021-12-18 21:07:39,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:39,919 INFO L225 Difference]: With dead ends: 107 [2021-12-18 21:07:39,919 INFO L226 Difference]: Without dead ends: 107 [2021-12-18 21:07:39,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-12-18 21:07:39,920 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 114 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:39,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 595 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 380 Invalid, 0 Unknown, 111 Unchecked, 0.3s Time] [2021-12-18 21:07:39,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-18 21:07:39,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 95. [2021-12-18 21:07:39,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 81 states have internal predecessors, (83), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:07:39,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-12-18 21:07:39,922 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 54 [2021-12-18 21:07:39,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:39,923 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-12-18 21:07:39,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 21:07:39,923 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-12-18 21:07:39,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 21:07:39,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:39,924 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:39,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-12-18 21:07:40,136 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 21:07:40,333 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 21:07:40,334 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:07:40,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:40,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1825890595, now seen corresponding path program 1 times [2021-12-18 21:07:40,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:40,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626587039] [2021-12-18 21:07:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:40,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:40,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:40,336 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 21:07:40,337 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 21:07:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:40,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:07:40,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:40,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:07:40,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:07:40,733 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:40,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626587039] [2021-12-18 21:07:40,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626587039] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:07:40,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:07:40,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-12-18 21:07:40,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779388079] [2021-12-18 21:07:40,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:07:40,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:07:40,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:40,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:07:40,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:07:40,734 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 21:07:40,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:40,838 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2021-12-18 21:07:40,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:07:40,839 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2021-12-18 21:07:40,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:40,839 INFO L225 Difference]: With dead ends: 95 [2021-12-18 21:07:40,839 INFO L226 Difference]: Without dead ends: 95 [2021-12-18 21:07:40,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:07:40,840 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 22 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:40,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 252 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2021-12-18 21:07:40,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-18 21:07:40,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-18 21:07:40,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 81 states have internal predecessors, (82), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:07:40,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-12-18 21:07:40,842 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 54 [2021-12-18 21:07:40,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:40,842 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-12-18 21:07:40,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 21:07:40,842 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-12-18 21:07:40,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 21:07:40,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:40,843 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:40,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2021-12-18 21:07:41,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:07:41,047 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:07:41,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:41,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1960758395, now seen corresponding path program 1 times [2021-12-18 21:07:41,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:41,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969187907] [2021-12-18 21:07:41,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:41,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:41,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:41,049 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:07:41,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-12-18 21:07:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:41,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:07:41,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:07:41,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:07:41,878 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:41,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969187907] [2021-12-18 21:07:41,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969187907] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:07:41,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:07:41,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-18 21:07:41,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558278545] [2021-12-18 21:07:41,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:07:41,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:07:41,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:41,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:07:41,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:07:41,879 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-18 21:07:41,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:41,896 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-12-18 21:07:41,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:07:41,896 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 56 [2021-12-18 21:07:41,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:41,897 INFO L225 Difference]: With dead ends: 96 [2021-12-18 21:07:41,897 INFO L226 Difference]: Without dead ends: 96 [2021-12-18 21:07:41,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:07:41,897 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 59 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:41,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 238 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 40 Unchecked, 0.0s Time] [2021-12-18 21:07:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-18 21:07:41,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-18 21:07:41,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 82 states have internal predecessors, (83), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:07:41,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2021-12-18 21:07:41,900 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 56 [2021-12-18 21:07:41,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:41,900 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2021-12-18 21:07:41,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-18 21:07:41,900 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2021-12-18 21:07:41,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-18 21:07:41,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:41,901 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:41,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2021-12-18 21:07:42,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:07:42,103 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:07:42,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:42,104 INFO L85 PathProgramCache]: Analyzing trace with hash -2093454019, now seen corresponding path program 1 times [2021-12-18 21:07:42,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:42,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613586328] [2021-12-18 21:07:42,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:42,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:42,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:42,105 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 21:07:42,107 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 21:07:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:42,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:07:42,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:07:42,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:07:43,067 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:43,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613586328] [2021-12-18 21:07:43,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613586328] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:07:43,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:07:43,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-18 21:07:43,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633825198] [2021-12-18 21:07:43,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:07:43,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:07:43,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:43,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:07:43,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:07:43,068 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-18 21:07:43,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:43,091 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2021-12-18 21:07:43,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:07:43,092 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 57 [2021-12-18 21:07:43,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:43,092 INFO L225 Difference]: With dead ends: 95 [2021-12-18 21:07:43,092 INFO L226 Difference]: Without dead ends: 95 [2021-12-18 21:07:43,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:07:43,093 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 69 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:43,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 306 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 49 Unchecked, 0.0s Time] [2021-12-18 21:07:43,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-18 21:07:43,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-18 21:07:43,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 81 states have internal predecessors, (82), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:07:43,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-12-18 21:07:43,096 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 57 [2021-12-18 21:07:43,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:43,096 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-12-18 21:07:43,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-18 21:07:43,096 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-12-18 21:07:43,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-18 21:07:43,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:43,097 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:43,107 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 21:07:43,306 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 21:07:43,307 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:07:43,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:43,308 INFO L85 PathProgramCache]: Analyzing trace with hash -653967976, now seen corresponding path program 1 times [2021-12-18 21:07:43,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:43,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659272553] [2021-12-18 21:07:43,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:43,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:43,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:43,310 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 21:07:43,311 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 21:07:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:43,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 21:07:43,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:43,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:43,574 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:07:43,574 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 21:07:43,771 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 21:07:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:07:43,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:07:44,144 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:44,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659272553] [2021-12-18 21:07:44,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659272553] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:07:44,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:07:44,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-12-18 21:07:44,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944380616] [2021-12-18 21:07:44,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:07:44,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 21:07:44,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:44,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 21:07:44,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-18 21:07:44,146 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 14 states, 13 states have (on average 4.384615384615385) internal successors, (57), 11 states have internal predecessors, (57), 3 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-18 21:07:44,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:07:44,390 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-12-18 21:07:44,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 21:07:44,391 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.384615384615385) internal successors, (57), 11 states have internal predecessors, (57), 3 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 57 [2021-12-18 21:07:44,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:07:44,391 INFO L225 Difference]: With dead ends: 96 [2021-12-18 21:07:44,392 INFO L226 Difference]: Without dead ends: 96 [2021-12-18 21:07:44,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 94 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-18 21:07:44,392 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 83 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:07:44,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 258 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 200 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2021-12-18 21:07:44,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-18 21:07:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-18 21:07:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 77 states have (on average 1.077922077922078) internal successors, (83), 82 states have internal predecessors, (83), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:07:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2021-12-18 21:07:44,395 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 57 [2021-12-18 21:07:44,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:07:44,395 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2021-12-18 21:07:44,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.384615384615385) internal successors, (57), 11 states have internal predecessors, (57), 3 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-18 21:07:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2021-12-18 21:07:44,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-18 21:07:44,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:07:44,396 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:07:44,412 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 21:07:44,606 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 21:07:44,607 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:07:44,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:07:44,607 INFO L85 PathProgramCache]: Analyzing trace with hash -472565031, now seen corresponding path program 1 times [2021-12-18 21:07:44,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:07:44,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179921792] [2021-12-18 21:07:44,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:44,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:07:44,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:07:44,609 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 21:07:44,611 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 21:07:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:44,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 21:07:44,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:44,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:45,139 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:07:45,139 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 21:07:45,345 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 21:07:45,523 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 21:07:45,678 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 21:07:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 21:07:45,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:46,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-18 21:07:46,247 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 90 treesize of output 78 [2021-12-18 21:07:46,631 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:07:46,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179921792] [2021-12-18 21:07:46,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179921792] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:07:46,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [175353804] [2021-12-18 21:07:46,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:07:46,631 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:07:46,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:07:46,634 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 21:07:46,635 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 21:07:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:07:46,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-18 21:07:46,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:07:46,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:47,179 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:47,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:07:47,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:07:47,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:07:49,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:07:49,806 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-18 21:07:49,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-12-18 21:07:49,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 21:07:50,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:07:50,314 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-12-18 21:07:50,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 20 [2021-12-18 21:07:50,582 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:07:50,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:07:50,943 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 21:07:51,009 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 16 treesize of output 8 [2021-12-18 21:07:51,050 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 21:07:51,059 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:07:51,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:07:51,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-18 21:07:51,435 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 90 treesize of output 78 [2021-12-18 21:07:51,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:07:51,560 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 29 treesize of output 33 [2021-12-18 21:07:51,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [175353804] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:07:51,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:07:51,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 33] total 42 [2021-12-18 21:07:51,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646983162] [2021-12-18 21:07:51,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:07:51,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 21:07:51,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:07:51,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 21:07:51,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2518, Unknown=1, NotChecked=0, Total=2756 [2021-12-18 21:07:51,908 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 43 states, 40 states have (on average 1.775) internal successors, (71), 35 states have internal predecessors, (71), 7 states have call successors, (8), 4 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-18 21:08:02,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:08:02,443 INFO L93 Difference]: Finished difference Result 102 states and 101 transitions. [2021-12-18 21:08:02,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 21:08:02,443 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.775) internal successors, (71), 35 states have internal predecessors, (71), 7 states have call successors, (8), 4 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 58 [2021-12-18 21:08:02,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:08:02,444 INFO L225 Difference]: With dead ends: 102 [2021-12-18 21:08:02,444 INFO L226 Difference]: Without dead ends: 102 [2021-12-18 21:08:02,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 107 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=492, Invalid=4906, Unknown=4, NotChecked=0, Total=5402 [2021-12-18 21:08:02,447 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 149 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 364 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:08:02,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 699 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1119 Invalid, 0 Unknown, 364 Unchecked, 1.1s Time] [2021-12-18 21:08:02,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-18 21:08:02,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2021-12-18 21:08:02,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 81 states have internal predecessors, (82), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:08:02,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-12-18 21:08:02,450 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 58 [2021-12-18 21:08:02,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:08:02,450 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-12-18 21:08:02,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.775) internal successors, (71), 35 states have internal predecessors, (71), 7 states have call successors, (8), 4 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-18 21:08:02,451 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-12-18 21:08:02,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-18 21:08:02,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:02,451 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:08:02,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-12-18 21:08:02,665 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 21:08:02,862 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 21:08:02,862 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:08:02,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:02,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1764613952, now seen corresponding path program 1 times [2021-12-18 21:08:02,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:02,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512369697] [2021-12-18 21:08:02,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:02,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:02,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:02,864 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 21:08:02,865 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 21:08:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:03,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:08:03,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:08:03,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:08:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:08:03,279 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:03,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512369697] [2021-12-18 21:08:03,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512369697] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:08:03,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:08:03,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-12-18 21:08:03,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633013146] [2021-12-18 21:08:03,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:08:03,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:08:03,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:08:03,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:08:03,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:08:03,281 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 5 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:08:03,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:08:03,305 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-12-18 21:08:03,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:08:03,306 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2021-12-18 21:08:03,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:08:03,306 INFO L225 Difference]: With dead ends: 94 [2021-12-18 21:08:03,307 INFO L226 Difference]: Without dead ends: 94 [2021-12-18 21:08:03,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:08:03,307 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 14 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:08:03,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 197 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:08:03,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-18 21:08:03,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-12-18 21:08:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 77 states have (on average 1.051948051948052) internal successors, (81), 80 states have internal predecessors, (81), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:08:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2021-12-18 21:08:03,310 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 59 [2021-12-18 21:08:03,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:08:03,310 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2021-12-18 21:08:03,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 21:08:03,310 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2021-12-18 21:08:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-18 21:08:03,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:03,311 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:08:03,326 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 21:08:03,522 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 21:08:03,522 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:08:03,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:03,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1131542459, now seen corresponding path program 1 times [2021-12-18 21:08:03,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:03,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097548710] [2021-12-18 21:08:03,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:03,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:03,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:03,524 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 21:08:03,526 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 21:08:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:03,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:08:03,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:08:04,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:08:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:08:04,521 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:04,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097548710] [2021-12-18 21:08:04,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097548710] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:08:04,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:08:04,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-18 21:08:04,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067004054] [2021-12-18 21:08:04,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:08:04,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:08:04,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:08:04,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:08:04,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:08:04,522 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-18 21:08:04,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:08:04,540 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2021-12-18 21:08:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:08:04,541 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 60 [2021-12-18 21:08:04,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:08:04,541 INFO L225 Difference]: With dead ends: 93 [2021-12-18 21:08:04,542 INFO L226 Difference]: Without dead ends: 93 [2021-12-18 21:08:04,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:08:04,542 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 64 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:08:04,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 279 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 64 Unchecked, 0.0s Time] [2021-12-18 21:08:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-18 21:08:04,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-12-18 21:08:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 79 states have internal predecessors, (80), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:08:04,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-12-18 21:08:04,545 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 60 [2021-12-18 21:08:04,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:08:04,545 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-12-18 21:08:04,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-18 21:08:04,545 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-12-18 21:08:04,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-18 21:08:04,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:04,546 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:08:04,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2021-12-18 21:08:04,756 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 21:08:04,757 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:08:04,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:04,757 INFO L85 PathProgramCache]: Analyzing trace with hash -388191190, now seen corresponding path program 1 times [2021-12-18 21:08:04,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:04,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704857801] [2021-12-18 21:08:04,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:04,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:04,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:04,759 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 21:08:04,761 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 21:08:04,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:04,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 21:08:04,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:04,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:08:05,054 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:08:05,054 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 21:08:05,163 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:08:05,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 21:08:05,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-18 21:08:05,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:08:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 21:08:05,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:08:10,213 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:10,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704857801] [2021-12-18 21:08:10,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704857801] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:08:10,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1375354071] [2021-12-18 21:08:10,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:10,214 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:08:10,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:08:10,215 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:08:10,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2021-12-18 21:08:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:10,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 21:08:10,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:10,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:08:10,507 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:08:10,508 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 21:08:10,541 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:08:10,541 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 13 treesize of output 13 [2021-12-18 21:08:10,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-18 21:08:10,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:08:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:08:10,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:08:11,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:08:11,236 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 26 treesize of output 30 [2021-12-18 21:08:11,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1375354071] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:08:11,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:08:11,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 17 [2021-12-18 21:08:11,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048631770] [2021-12-18 21:08:11,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:08:11,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 21:08:11,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:08:11,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 21:08:11,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=416, Unknown=2, NotChecked=0, Total=506 [2021-12-18 21:08:11,387 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 18 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 14 states have internal predecessors, (53), 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 21:08:11,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:08:11,711 INFO L93 Difference]: Finished difference Result 99 states and 98 transitions. [2021-12-18 21:08:11,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 21:08:11,711 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 14 states have internal predecessors, (53), 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 60 [2021-12-18 21:08:11,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:08:11,712 INFO L225 Difference]: With dead ends: 99 [2021-12-18 21:08:11,712 INFO L226 Difference]: Without dead ends: 99 [2021-12-18 21:08:11,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 161 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=100, Invalid=498, Unknown=2, NotChecked=0, Total=600 [2021-12-18 21:08:11,715 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 55 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:08:11,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 405 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 290 Invalid, 0 Unknown, 37 Unchecked, 0.3s Time] [2021-12-18 21:08:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-18 21:08:11,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2021-12-18 21:08:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 80 states have (on average 1.0375) internal successors, (83), 82 states have internal predecessors, (83), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:08:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2021-12-18 21:08:11,719 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 60 [2021-12-18 21:08:11,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:08:11,719 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2021-12-18 21:08:11,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 14 states have internal predecessors, (53), 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 21:08:11,719 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2021-12-18 21:08:11,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 21:08:11,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:11,720 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:08:11,732 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 21:08:11,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2021-12-18 21:08:12,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:08:12,131 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:08:12,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:12,131 INFO L85 PathProgramCache]: Analyzing trace with hash 718077986, now seen corresponding path program 1 times [2021-12-18 21:08:12,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:12,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762322025] [2021-12-18 21:08:12,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:12,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:12,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:12,133 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 21:08:12,136 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 21:08:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:12,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-18 21:08:12,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:12,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:08:12,486 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:08:12,487 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 21:08:12,726 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:08:12,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-12-18 21:08:12,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 21:08:13,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-18 21:08:13,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 21:08:13,355 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 17 treesize of output 19 [2021-12-18 21:08:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 21:08:13,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:08:13,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-18 21:08:14,020 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 92 treesize of output 80 [2021-12-18 21:08:14,398 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:14,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762322025] [2021-12-18 21:08:14,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762322025] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:08:14,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1595306165] [2021-12-18 21:08:14,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:14,398 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:08:14,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:08:14,399 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:08:14,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2021-12-18 21:08:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:14,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-18 21:08:14,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:14,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:08:14,817 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:08:14,817 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 21:08:15,039 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:08:15,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-12-18 21:08:15,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 21:08:15,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-18 21:08:15,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 21:08:15,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 19 [2021-12-18 21:08:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:08:15,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:08:15,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-18 21:08:15,768 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 92 treesize of output 80 [2021-12-18 21:08:16,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1595306165] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:08:16,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:08:16,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 28 [2021-12-18 21:08:16,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869884340] [2021-12-18 21:08:16,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:08:16,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 21:08:16,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:08:16,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 21:08:16,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 21:08:16,109 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 23 states have internal predecessors, (52), 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 21:08:17,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:08:17,135 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2021-12-18 21:08:17,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 21:08:17,135 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 23 states have internal predecessors, (52), 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 61 [2021-12-18 21:08:17,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:08:17,135 INFO L225 Difference]: With dead ends: 95 [2021-12-18 21:08:17,136 INFO L226 Difference]: Without dead ends: 95 [2021-12-18 21:08:17,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 125 SyntacticMatches, 16 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=275, Invalid=1795, Unknown=0, NotChecked=0, Total=2070 [2021-12-18 21:08:17,136 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 144 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 21:08:17,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 461 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 592 Invalid, 0 Unknown, 253 Unchecked, 0.6s Time] [2021-12-18 21:08:17,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-18 21:08:17,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-18 21:08:17,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 80 states have (on average 1.025) internal successors, (82), 81 states have internal predecessors, (82), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:08:17,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-12-18 21:08:17,139 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 61 [2021-12-18 21:08:17,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:08:17,139 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-12-18 21:08:17,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 23 states have internal predecessors, (52), 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 21:08:17,140 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-12-18 21:08:17,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-18 21:08:17,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:17,140 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:08:17,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-12-18 21:08:17,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2021-12-18 21:08:17,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:08:17,551 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:08:17,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:17,552 INFO L85 PathProgramCache]: Analyzing trace with hash 610425485, now seen corresponding path program 1 times [2021-12-18 21:08:17,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:17,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825684696] [2021-12-18 21:08:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:17,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:17,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:17,553 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:08:17,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-12-18 21:08:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:17,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 21:08:17,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:18,818 INFO L354 Elim1Store]: treesize reduction 48, result has 39.2 percent of original size [2021-12-18 21:08:18,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 100 treesize of output 117 [2021-12-18 21:08:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 21:08:30,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:08:37,025 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:37,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825684696] [2021-12-18 21:08:37,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825684696] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:08:37,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [484805994] [2021-12-18 21:08:37,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:37,026 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:08:37,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:08:37,027 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:08:37,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2021-12-18 21:08:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:37,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-18 21:08:37,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:40,067 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 21:08:40,206 INFO L354 Elim1Store]: treesize reduction 19, result has 24.0 percent of original size [2021-12-18 21:08:40,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 37 [2021-12-18 21:08:40,668 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:08:40,668 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 14 treesize of output 20 [2021-12-18 21:08:40,674 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 5 treesize of output 3 [2021-12-18 21:08:41,654 INFO L354 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2021-12-18 21:08:41,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 77 [2021-12-18 21:08:42,005 INFO L354 Elim1Store]: treesize reduction 75, result has 42.3 percent of original size [2021-12-18 21:08:42,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 139 treesize of output 176 [2021-12-18 21:08:42,016 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 11 treesize of output 7 [2021-12-18 21:08:42,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-12-18 21:09:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 21:09:13,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:09:19,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [484805994] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:09:19,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:09:19,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 38 [2021-12-18 21:09:19,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121364570] [2021-12-18 21:09:19,165 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:09:19,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-18 21:09:19,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:19,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-18 21:09:19,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1863, Unknown=13, NotChecked=0, Total=2070 [2021-12-18 21:09:19,166 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 39 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-18 21:09:22,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:22,769 INFO L93 Difference]: Finished difference Result 97 states and 96 transitions. [2021-12-18 21:09:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 21:09:22,769 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 62 [2021-12-18 21:09:22,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:22,770 INFO L225 Difference]: With dead ends: 97 [2021-12-18 21:09:22,770 INFO L226 Difference]: Without dead ends: 68 [2021-12-18 21:09:22,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 112 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 47.0s TimeCoverageRelationStatistics Valid=308, Invalid=2985, Unknown=13, NotChecked=0, Total=3306 [2021-12-18 21:09:22,771 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 23 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:22,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 584 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 266 Unchecked, 0.0s Time] [2021-12-18 21:09:22,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-18 21:09:22,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-12-18 21:09:22,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 57 states have internal predecessors, (57), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:09:22,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 67 transitions. [2021-12-18 21:09:22,777 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 67 transitions. Word has length 62 [2021-12-18 21:09:22,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:22,778 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 67 transitions. [2021-12-18 21:09:22,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-18 21:09:22,778 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 67 transitions. [2021-12-18 21:09:22,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-18 21:09:22,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:22,778 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:22,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2021-12-18 21:09:22,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2021-12-18 21:09:23,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:23,183 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:09:23,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:23,184 INFO L85 PathProgramCache]: Analyzing trace with hash -970693280, now seen corresponding path program 1 times [2021-12-18 21:09:23,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:23,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697967846] [2021-12-18 21:09:23,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:23,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:23,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:23,185 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 21:09:23,186 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 21:09:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:23,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-18 21:09:23,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:23,402 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 21:09:23,498 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:09:23,499 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 21:09:23,614 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:09:23,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-12-18 21:09:23,936 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:09:23,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-12-18 21:09:24,160 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 21:09:24,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 16 treesize of output 8 [2021-12-18 21:09:24,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 21:09:24,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 21:09:24,740 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 18 treesize of output 20 [2021-12-18 21:09:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:09:24,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:09:25,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 40 treesize of output 34 [2021-12-18 21:09:25,593 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 40 treesize of output 34 [2021-12-18 21:09:25,935 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:25,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697967846] [2021-12-18 21:09:25,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697967846] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:09:25,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1638451639] [2021-12-18 21:09:25,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:25,936 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:09:25,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:09:25,937 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:09:25,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2021-12-18 21:09:26,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:26,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-18 21:09:26,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:26,259 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 21:09:26,343 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:09:26,343 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 21:09:26,463 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:09:26,463 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 15 treesize of output 15 [2021-12-18 21:09:26,752 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:09:26,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-18 21:09:27,004 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 21:09:27,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 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 21:09:27,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 21:09:27,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 21:09:27,303 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 18 treesize of output 20 [2021-12-18 21:09:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:09:27,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:09:27,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:09:27,900 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 49 treesize of output 53 [2021-12-18 21:09:27,906 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 57 treesize of output 51 [2021-12-18 21:09:28,094 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 51 treesize of output 45 [2021-12-18 21:09:28,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:09:28,104 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 54 treesize of output 58 [2021-12-18 21:09:28,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1638451639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:09:28,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:09:28,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 35 [2021-12-18 21:09:28,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441734878] [2021-12-18 21:09:28,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:09:28,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-18 21:09:28,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:28,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-18 21:09:28,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1916, Unknown=0, NotChecked=0, Total=2162 [2021-12-18 21:09:28,405 INFO L87 Difference]: Start difference. First operand 68 states and 67 transitions. Second operand has 36 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 28 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-18 21:09:29,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:29,612 INFO L93 Difference]: Finished difference Result 67 states and 66 transitions. [2021-12-18 21:09:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 21:09:29,613 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 28 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 64 [2021-12-18 21:09:29,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:29,613 INFO L225 Difference]: With dead ends: 67 [2021-12-18 21:09:29,613 INFO L226 Difference]: Without dead ends: 67 [2021-12-18 21:09:29,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 125 SyntacticMatches, 17 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=423, Invalid=2769, Unknown=0, NotChecked=0, Total=3192 [2021-12-18 21:09:29,614 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 197 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:29,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 245 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 542 Invalid, 0 Unknown, 106 Unchecked, 0.5s Time] [2021-12-18 21:09:29,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-18 21:09:29,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-12-18 21:09:29,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 56 states have (on average 1.0) internal successors, (56), 56 states have internal predecessors, (56), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:09:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 66 transitions. [2021-12-18 21:09:29,616 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 66 transitions. Word has length 64 [2021-12-18 21:09:29,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:29,617 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 66 transitions. [2021-12-18 21:09:29,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 28 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-18 21:09:29,617 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 66 transitions. [2021-12-18 21:09:29,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 21:09:29,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:29,628 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:29,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (66)] Ended with exit code 0 [2021-12-18 21:09:29,839 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 21:09:30,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:30,032 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 21:09:30,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:30,032 INFO L85 PathProgramCache]: Analyzing trace with hash -828334525, now seen corresponding path program 1 times [2021-12-18 21:09:30,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:30,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390977480] [2021-12-18 21:09:30,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:30,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:30,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:30,033 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:30,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-12-18 21:09:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:30,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-18 21:09:30,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:31,896 INFO L354 Elim1Store]: treesize reduction 105, result has 33.1 percent of original size [2021-12-18 21:09:31,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 621 treesize of output 646 [2021-12-18 21:09:33,522 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 21:09:34,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-12-18 21:09:56,108 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 21:09:56,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:10:03,388 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 128 treesize of output 116 [2021-12-18 21:10:09,046 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:09,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390977480] [2021-12-18 21:10:09,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390977480] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:10:09,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1131333936] [2021-12-18 21:10:09,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:09,047 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:10:09,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:10:09,048 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:10:09,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2021-12-18 21:10:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:09,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-18 21:10:09,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:19,816 INFO L354 Elim1Store]: treesize reduction 153, result has 34.9 percent of original size [2021-12-18 21:10:19,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 16 case distinctions, treesize of input 184 treesize of output 245 [2021-12-18 21:10:20,377 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 21:10:22,024 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 51 treesize of output 33 [2021-12-18 21:11:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:11:29,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:11:55,772 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 262 treesize of output 238 [2021-12-18 21:12:21,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1131333936] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:12:21,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:12:21,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 33] total 59 [2021-12-18 21:12:21,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791312816] [2021-12-18 21:12:21,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:12:21,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-18 21:12:21,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:21,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-18 21:12:21,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=6445, Unknown=19, NotChecked=0, Total=6806 [2021-12-18 21:12:21,732 INFO L87 Difference]: Start difference. First operand 67 states and 66 transitions. Second operand has 60 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 51 states have internal predecessors, (95), 10 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-18 21:13:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:13:12,593 INFO L93 Difference]: Finished difference Result 66 states and 65 transitions. [2021-12-18 21:13:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-18 21:13:12,593 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 51 states have internal predecessors, (95), 10 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 66 [2021-12-18 21:13:12,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:13:12,593 INFO L225 Difference]: With dead ends: 66 [2021-12-18 21:13:12,593 INFO L226 Difference]: Without dead ends: 0 [2021-12-18 21:13:12,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 91 SyntacticMatches, 10 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3077 ImplicationChecksByTransitivity, 148.7s TimeCoverageRelationStatistics Valid=509, Invalid=9764, Unknown=29, NotChecked=0, Total=10302 [2021-12-18 21:13:12,595 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 327 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:13:12,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 479 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 327 Unchecked, 0.0s Time] [2021-12-18 21:13:12,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-18 21:13:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-18 21:13:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:13:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-18 21:13:12,596 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2021-12-18 21:13:12,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:13:12,596 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-18 21:13:12,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 51 states have internal predecessors, (95), 10 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-18 21:13:12,596 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-18 21:13:12,596 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-18 21:13:12,598 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (26 of 27 remaining) [2021-12-18 21:13:12,598 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (25 of 27 remaining) [2021-12-18 21:13:12,598 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (24 of 27 remaining) [2021-12-18 21:13:12,598 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (23 of 27 remaining) [2021-12-18 21:13:12,598 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (22 of 27 remaining) [2021-12-18 21:13:12,598 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (21 of 27 remaining) [2021-12-18 21:13:12,599 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (20 of 27 remaining) [2021-12-18 21:13:12,599 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (19 of 27 remaining) [2021-12-18 21:13:12,599 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION (18 of 27 remaining) [2021-12-18 21:13:12,599 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION (17 of 27 remaining) [2021-12-18 21:13:12,599 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATION (16 of 27 remaining) [2021-12-18 21:13:12,599 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATION (15 of 27 remaining) [2021-12-18 21:13:12,599 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (14 of 27 remaining) [2021-12-18 21:13:12,599 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE (13 of 27 remaining) [2021-12-18 21:13:12,599 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE (12 of 27 remaining) [2021-12-18 21:13:12,600 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE (11 of 27 remaining) [2021-12-18 21:13:12,600 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (10 of 27 remaining) [2021-12-18 21:13:12,600 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (9 of 27 remaining) [2021-12-18 21:13:12,600 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (8 of 27 remaining) [2021-12-18 21:13:12,600 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE (7 of 27 remaining) [2021-12-18 21:13:12,600 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE (6 of 27 remaining) [2021-12-18 21:13:12,600 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE (5 of 27 remaining) [2021-12-18 21:13:12,600 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE (4 of 27 remaining) [2021-12-18 21:13:12,600 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE (3 of 27 remaining) [2021-12-18 21:13:12,600 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK (2 of 27 remaining) [2021-12-18 21:13:12,600 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_i2c_set_clientdataErr0REQUIRES_VIOLATION (1 of 27 remaining) [2021-12-18 21:13:12,600 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_i2c_set_clientdataErr1REQUIRES_VIOLATION (0 of 27 remaining) [2021-12-18 21:13:12,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (68)] Ended with exit code 0 [2021-12-18 21:13:12,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2021-12-18 21:13:13,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:13:13,009 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:13:13,010 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-18 21:13:13,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 09:13:13 BoogieIcfgContainer [2021-12-18 21:13:13,013 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-18 21:13:13,013 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-18 21:13:13,013 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-18 21:13:13,013 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-18 21:13:13,014 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:04:04" (3/4) ... [2021-12-18 21:13:13,016 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-18 21:13:13,020 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ldv_malloc [2021-12-18 21:13:13,021 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ldv_i2c_set_clientdata [2021-12-18 21:13:13,025 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-12-18 21:13:13,025 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-12-18 21:13:13,026 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-18 21:13:13,057 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-18 21:13:13,057 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-18 21:13:13,057 INFO L158 Benchmark]: Toolchain (without parser) took 549610.04ms. Allocated memory was 52.4MB in the beginning and 109.1MB in the end (delta: 56.6MB). Free memory was 28.3MB in the beginning and 72.5MB in the end (delta: -44.2MB). Peak memory consumption was 66.6MB. Max. memory is 16.1GB. [2021-12-18 21:13:13,058 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 52.4MB. Free memory was 35.2MB in the beginning and 35.1MB in the end (delta: 44.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 21:13:13,058 INFO L158 Benchmark]: CACSL2BoogieTranslator took 642.95ms. Allocated memory was 52.4MB in the beginning and 67.1MB in the end (delta: 14.7MB). Free memory was 28.1MB in the beginning and 44.3MB in the end (delta: -16.2MB). Peak memory consumption was 14.3MB. Max. memory is 16.1GB. [2021-12-18 21:13:13,058 INFO L158 Benchmark]: Boogie Procedure Inliner took 66.03ms. Allocated memory is still 67.1MB. Free memory was 44.3MB in the beginning and 41.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 21:13:13,058 INFO L158 Benchmark]: Boogie Preprocessor took 59.43ms. Allocated memory is still 67.1MB. Free memory was 41.8MB in the beginning and 40.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 21:13:13,058 INFO L158 Benchmark]: RCFGBuilder took 599.56ms. Allocated memory is still 67.1MB. Free memory was 39.8MB in the beginning and 40.7MB in the end (delta: -904.5kB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. [2021-12-18 21:13:13,058 INFO L158 Benchmark]: TraceAbstraction took 548190.64ms. Allocated memory was 67.1MB in the beginning and 109.1MB in the end (delta: 41.9MB). Free memory was 40.2MB in the beginning and 22.0MB in the end (delta: 18.2MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. [2021-12-18 21:13:13,058 INFO L158 Benchmark]: Witness Printer took 43.86ms. Allocated memory is still 109.1MB. Free memory was 22.0MB in the beginning and 72.5MB in the end (delta: -50.5MB). Peak memory consumption was 2.3MB. Max. memory is 16.1GB. [2021-12-18 21:13:13,059 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 52.4MB. Free memory was 35.2MB in the beginning and 35.1MB in the end (delta: 44.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 642.95ms. Allocated memory was 52.4MB in the beginning and 67.1MB in the end (delta: 14.7MB). Free memory was 28.1MB in the beginning and 44.3MB in the end (delta: -16.2MB). Peak memory consumption was 14.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 66.03ms. Allocated memory is still 67.1MB. Free memory was 44.3MB in the beginning and 41.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.43ms. Allocated memory is still 67.1MB. Free memory was 41.8MB in the beginning and 40.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 599.56ms. Allocated memory is still 67.1MB. Free memory was 39.8MB in the beginning and 40.7MB in the end (delta: -904.5kB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. * TraceAbstraction took 548190.64ms. Allocated memory was 67.1MB in the beginning and 109.1MB in the end (delta: 41.9MB). Free memory was 40.2MB in the beginning and 22.0MB in the end (delta: 18.2MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. * Witness Printer took 43.86ms. Allocated memory is still 109.1MB. Free memory was 22.0MB in the beginning and 72.5MB in the end (delta: -50.5MB). Peak memory consumption was 2.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 807]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 807]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 811]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 811]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 784]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 784]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 785]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 785]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 788]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 788]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 619]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 619]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 798]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 798]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 798]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 814]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 814]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 814]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 816]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 816]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 816]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 818]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 818]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 818]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 822]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 623]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 623]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 85 locations, 27 error locations. Started 1 CEGAR loops. OverallTime: 548.1s, OverallIterations: 49, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 123.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4176 SdHoareTripleChecker+Valid, 13.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4095 mSDsluCounter, 23229 SdHoareTripleChecker+Invalid, 11.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3985 IncrementalHoareTripleChecker+Unchecked, 19640 mSDsCounter, 531 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11866 IncrementalHoareTripleChecker+Invalid, 16382 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 531 mSolverCounterUnsat, 3589 mSDtfsCounter, 11866 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4237 GetRequests, 3070 SyntacticMatches, 173 SemanticMatches, 994 ConstructedPredicates, 9 IntricatePredicates, 5 DeprecatedPredicates, 11732 ImplicationChecksByTransitivity, 390.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=195occurred in iteration=10, InterpolantAutomatonStates: 576, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 49 MinimizatonAttempts, 932 StatesRemovedByMinimization, 33 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 4.1s SatisfiabilityAnalysisTime, 401.4s InterpolantComputationTime, 2753 NumberOfCodeBlocks, 2753 NumberOfCodeBlocksAsserted, 67 NumberOfCheckSat, 3459 ConstructedInterpolants, 733 QuantifiedInterpolants, 37772 SizeOfPredicates, 765 NumberOfNonLiveVariables, 10748 ConjunctsInSsa, 1873 ConjunctsInUnsatCore, 84 InterpolantComputations, 18 PerfectInterpolantSequences, 1162/1564 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 27 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-18 21:13:13,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE