./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test23_4.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_test23_4.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 4318218de1a670b98e217596890d501e5109c78977de7e98dfa51804dcb18c15 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:58:29,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:58:29,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:58:29,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:58:29,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:58:29,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:58:29,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:58:29,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:58:29,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:58:29,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:58:29,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:58:29,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:58:29,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:58:29,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:58:29,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:58:29,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:58:29,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:58:29,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:58:29,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:58:29,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:58:29,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:58:29,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:58:29,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:58:29,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:58:29,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:58:29,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:58:29,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:58:29,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:58:29,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:58:29,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:58:29,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:58:29,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:58:29,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:58:29,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:58:29,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:58:29,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:58:29,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:58:29,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:58:29,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:58:29,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:58:29,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:58:29,368 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 05:58:29,389 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:58:29,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:58:29,390 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:58:29,390 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:58:29,391 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:58:29,391 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:58:29,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:58:29,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:58:29,392 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:58:29,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:58:29,393 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:58:29,394 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:58:29,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:58:29,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:58:29,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:58:29,394 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:58:29,395 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:58:29,395 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 05:58:29,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:58:29,395 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:58:29,395 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:58:29,396 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:58:29,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:58:29,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:58:29,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:58:29,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:58:29,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:58:29,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:58:29,399 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 05:58:29,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 05:58:29,399 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:58:29,399 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4318218de1a670b98e217596890d501e5109c78977de7e98dfa51804dcb18c15 [2021-12-16 05:58:29,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:58:29,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:58:29,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:58:29,666 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:58:29,666 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:58:29,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test23_4.i [2021-12-16 05:58:29,732 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5094b49d3/6dfcfd19553b4c43a7643e62908994f7/FLAG968cf5f82 [2021-12-16 05:58:30,205 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:58:30,205 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test23_4.i [2021-12-16 05:58:30,221 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5094b49d3/6dfcfd19553b4c43a7643e62908994f7/FLAG968cf5f82 [2021-12-16 05:58:30,554 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5094b49d3/6dfcfd19553b4c43a7643e62908994f7 [2021-12-16 05:58:30,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:58:30,557 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:58:30,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:58:30,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:58:30,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:58:30,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:58:30" (1/1) ... [2021-12-16 05:58:30,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e15061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:58:30, skipping insertion in model container [2021-12-16 05:58:30,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:58:30" (1/1) ... [2021-12-16 05:58:30,571 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:58:30,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:58:31,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:58:31,029 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) [2021-12-16 05:58:31,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5c2dcf66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:58:31, skipping insertion in model container [2021-12-16 05:58:31,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:58:31,031 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-16 05:58:31,033 INFO L158 Benchmark]: Toolchain (without parser) took 474.40ms. Allocated memory is still 98.6MB. Free memory was 67.1MB in the beginning and 69.7MB in the end (delta: -2.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 05:58:31,034 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 98.6MB. Free memory was 55.9MB in the beginning and 55.8MB in the end (delta: 43.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 05:58:31,035 INFO L158 Benchmark]: CACSL2BoogieTranslator took 472.24ms. Allocated memory is still 98.6MB. Free memory was 66.8MB in the beginning and 69.7MB in the end (delta: -2.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 05:58:31,036 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 98.6MB. Free memory was 55.9MB in the beginning and 55.8MB in the end (delta: 43.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 472.24ms. Allocated memory is still 98.6MB. Free memory was 66.8MB in the beginning and 69.7MB in the end (delta: -2.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test23_4.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 4318218de1a670b98e217596890d501e5109c78977de7e98dfa51804dcb18c15 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:58:32,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:58:32,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:58:32,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:58:32,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:58:32,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:58:32,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:58:32,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:58:32,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:58:32,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:58:32,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:58:32,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:58:32,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:58:32,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:58:32,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:58:32,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:58:32,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:58:32,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:58:32,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:58:32,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:58:32,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:58:32,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:58:32,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:58:32,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:58:32,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:58:32,750 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:58:32,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:58:32,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:58:32,752 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:58:32,753 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:58:32,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:58:32,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:58:32,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:58:32,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:58:32,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:58:32,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:58:32,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:58:32,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:58:32,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:58:32,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:58:32,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:58:32,761 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-16 05:58:32,795 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:58:32,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:58:32,797 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:58:32,797 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:58:32,798 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:58:32,798 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:58:32,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:58:32,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:58:32,800 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:58:32,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:58:32,800 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:58:32,801 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:58:32,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:58:32,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:58:32,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:58:32,801 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:58:32,801 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:58:32,801 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 05:58:32,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:58:32,802 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:58:32,802 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-16 05:58:32,802 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-16 05:58:32,802 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:58:32,802 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:58:32,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:58:32,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:58:32,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:58:32,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:58:32,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:58:32,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:58:32,824 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-16 05:58:32,824 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-16 05:58:32,824 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:58:32,824 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-16 05:58:32,824 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4318218de1a670b98e217596890d501e5109c78977de7e98dfa51804dcb18c15 [2021-12-16 05:58:33,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:58:33,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:58:33,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:58:33,146 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:58:33,146 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:58:33,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test23_4.i [2021-12-16 05:58:33,209 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/666b93906/f1b67e571d1e441aa8b2247820891990/FLAG5e3a7d30f [2021-12-16 05:58:33,639 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:58:33,640 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test23_4.i [2021-12-16 05:58:33,655 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/666b93906/f1b67e571d1e441aa8b2247820891990/FLAG5e3a7d30f [2021-12-16 05:58:33,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/666b93906/f1b67e571d1e441aa8b2247820891990 [2021-12-16 05:58:33,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:58:34,000 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:58:34,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:58:34,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:58:34,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:58:34,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:58:33" (1/1) ... [2021-12-16 05:58:34,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71c61677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:58:34, skipping insertion in model container [2021-12-16 05:58:34,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:58:33" (1/1) ... [2021-12-16 05:58:34,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:58:34,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:58:34,305 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:58:34,321 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-16 05:58:34,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:58:34,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:58:34,396 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 05:58:34,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:58:34,501 INFO L208 MainTranslator]: Completed translation [2021-12-16 05:58:34,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:58:34 WrapperNode [2021-12-16 05:58:34,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:58:34,502 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 05:58:34,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 05:58:34,503 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 05:58:34,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:58:34" (1/1) ... [2021-12-16 05:58:34,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:58:34" (1/1) ... [2021-12-16 05:58:34,558 INFO L137 Inliner]: procedures = 174, calls = 117, calls flagged for inlining = 29, calls inlined = 14, statements flattened = 184 [2021-12-16 05:58:34,559 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 05:58:34,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 05:58:34,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 05:58:34,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 05:58:34,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:58:34" (1/1) ... [2021-12-16 05:58:34,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:58:34" (1/1) ... [2021-12-16 05:58:34,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:58:34" (1/1) ... [2021-12-16 05:58:34,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:58:34" (1/1) ... [2021-12-16 05:58:34,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:58:34" (1/1) ... [2021-12-16 05:58:34,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:58:34" (1/1) ... [2021-12-16 05:58:34,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:58:34" (1/1) ... [2021-12-16 05:58:34,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 05:58:34,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 05:58:34,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 05:58:34,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 05:58:34,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:58:34" (1/1) ... [2021-12-16 05:58:34,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:58:34,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:58:34,628 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) [2021-12-16 05:58:34,659 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 [2021-12-16 05:58:34,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-16 05:58:34,670 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2021-12-16 05:58:34,670 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2021-12-16 05:58:34,670 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2021-12-16 05:58:34,671 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2021-12-16 05:58:34,671 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-16 05:58:34,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-16 05:58:34,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 05:58:34,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 05:58:34,672 INFO L130 BoogieDeclarations]: Found specification of procedure free_reports [2021-12-16 05:58:34,672 INFO L138 BoogieDeclarations]: Found implementation of procedure free_reports [2021-12-16 05:58:34,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 05:58:34,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 05:58:34,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 05:58:34,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-16 05:58:34,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 05:58:34,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 05:58:34,673 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2021-12-16 05:58:34,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2021-12-16 05:58:34,673 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-16 05:58:34,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-16 05:58:34,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 05:58:34,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 05:58:34,824 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 05:58:34,825 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 05:58:35,465 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 05:58:35,470 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 05:58:35,472 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 05:58:35,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:58:35 BoogieIcfgContainer [2021-12-16 05:58:35,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 05:58:35,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 05:58:35,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 05:58:35,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 05:58:35,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:58:33" (1/3) ... [2021-12-16 05:58:35,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b42305e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:58:35, skipping insertion in model container [2021-12-16 05:58:35,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:58:34" (2/3) ... [2021-12-16 05:58:35,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b42305e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:58:35, skipping insertion in model container [2021-12-16 05:58:35,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:58:35" (3/3) ... [2021-12-16 05:58:35,488 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test23_4.i [2021-12-16 05:58:35,491 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 05:58:35,492 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 76 error locations. [2021-12-16 05:58:35,522 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 05:58:35,527 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 [2021-12-16 05:58:35,527 INFO L340 AbstractCegarLoop]: Starting to check reachability of 76 error locations. [2021-12-16 05:58:35,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 198 states, 107 states have (on average 1.841121495327103) internal successors, (197), 183 states have internal predecessors, (197), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 05:58:35,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-16 05:58:35,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:35,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:35,549 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:35,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:35,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1838385922, now seen corresponding path program 1 times [2021-12-16 05:58:35,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:35,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278834781] [2021-12-16 05:58:35,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:35,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:35,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:35,564 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) [2021-12-16 05:58:35,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-16 05:58:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:35,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 05:58:35,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:35,790 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 [2021-12-16 05:58:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:35,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:35,860 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:35,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278834781] [2021-12-16 05:58:35,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278834781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:35,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:35,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:58:35,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331349119] [2021-12-16 05:58:35,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:35,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:58:35,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:35,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:58:35,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:58:35,902 INFO L87 Difference]: Start difference. First operand has 198 states, 107 states have (on average 1.841121495327103) internal successors, (197), 183 states have internal predecessors, (197), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:58:36,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:36,465 INFO L93 Difference]: Finished difference Result 225 states and 241 transitions. [2021-12-16 05:58:36,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 05:58:36,467 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-12-16 05:58:36,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:36,475 INFO L225 Difference]: With dead ends: 225 [2021-12-16 05:58:36,475 INFO L226 Difference]: Without dead ends: 221 [2021-12-16 05:58:36,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:58:36,479 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 28 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:36,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 813 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 05:58:36,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-16 05:58:36,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 205. [2021-12-16 05:58:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 113 states have (on average 1.7876106194690264) internal successors, (202), 188 states have internal predecessors, (202), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-16 05:58:36,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 221 transitions. [2021-12-16 05:58:36,518 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 221 transitions. Word has length 12 [2021-12-16 05:58:36,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:36,519 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 221 transitions. [2021-12-16 05:58:36,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:58:36,519 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 221 transitions. [2021-12-16 05:58:36,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-16 05:58:36,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:36,520 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:36,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:36,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:36,726 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:36,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:36,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1838385921, now seen corresponding path program 1 times [2021-12-16 05:58:36,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:36,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119948035] [2021-12-16 05:58:36,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:36,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:36,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:36,729 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) [2021-12-16 05:58:36,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-16 05:58:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:36,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 05:58:36,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:36,824 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 [2021-12-16 05:58:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:37,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:37,003 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:37,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119948035] [2021-12-16 05:58:37,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119948035] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:37,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:37,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 05:58:37,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037023702] [2021-12-16 05:58:37,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:37,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 05:58:37,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:37,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 05:58:37,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:58:37,006 INFO L87 Difference]: Start difference. First operand 205 states and 221 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:58:37,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:37,584 INFO L93 Difference]: Finished difference Result 230 states and 245 transitions. [2021-12-16 05:58:37,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 05:58:37,586 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-12-16 05:58:37,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:37,587 INFO L225 Difference]: With dead ends: 230 [2021-12-16 05:58:37,587 INFO L226 Difference]: Without dead ends: 230 [2021-12-16 05:58:37,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:58:37,588 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 35 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:37,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1057 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 05:58:37,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-16 05:58:37,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 205. [2021-12-16 05:58:37,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 113 states have (on average 1.7699115044247788) internal successors, (200), 188 states have internal predecessors, (200), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-16 05:58:37,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 219 transitions. [2021-12-16 05:58:37,597 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 219 transitions. Word has length 12 [2021-12-16 05:58:37,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:37,597 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 219 transitions. [2021-12-16 05:58:37,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:58:37,598 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 219 transitions. [2021-12-16 05:58:37,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-16 05:58:37,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:37,598 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:37,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:37,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:37,808 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:37,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:37,808 INFO L85 PathProgramCache]: Analyzing trace with hash -95575587, now seen corresponding path program 1 times [2021-12-16 05:58:37,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:37,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605280382] [2021-12-16 05:58:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:37,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:37,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:37,810 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) [2021-12-16 05:58:37,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-16 05:58:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:37,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 05:58:37,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:37,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:37,926 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:37,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605280382] [2021-12-16 05:58:37,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605280382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:37,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:37,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:58:37,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228452923] [2021-12-16 05:58:37,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:37,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:58:37,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:37,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:58:37,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:58:37,928 INFO L87 Difference]: Start difference. First operand 205 states and 219 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:58:37,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:37,951 INFO L93 Difference]: Finished difference Result 217 states and 231 transitions. [2021-12-16 05:58:37,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:58:37,951 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), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-12-16 05:58:37,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:37,953 INFO L225 Difference]: With dead ends: 217 [2021-12-16 05:58:37,953 INFO L226 Difference]: Without dead ends: 217 [2021-12-16 05:58:37,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:58:37,960 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 20 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:37,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 814 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:58:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-16 05:58:37,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 196. [2021-12-16 05:58:37,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 109 states have (on average 1.761467889908257) internal successors, (192), 180 states have internal predecessors, (192), 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) [2021-12-16 05:58:37,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 209 transitions. [2021-12-16 05:58:37,980 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 209 transitions. Word has length 12 [2021-12-16 05:58:37,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:37,980 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 209 transitions. [2021-12-16 05:58:37,981 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), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:58:37,981 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 209 transitions. [2021-12-16 05:58:37,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-16 05:58:37,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:37,981 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:37,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:38,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:38,182 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:38,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:38,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1838471554, now seen corresponding path program 1 times [2021-12-16 05:58:38,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:38,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034880659] [2021-12-16 05:58:38,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:38,183 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:38,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:38,200 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) [2021-12-16 05:58:38,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-16 05:58:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:38,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 05:58:38,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:38,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:38,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:38,292 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:38,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034880659] [2021-12-16 05:58:38,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034880659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:38,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:38,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:58:38,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831402565] [2021-12-16 05:58:38,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:38,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:58:38,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:38,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:58:38,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:58:38,296 INFO L87 Difference]: Start difference. First operand 196 states and 209 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-12-16 05:58:38,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:38,319 INFO L93 Difference]: Finished difference Result 217 states and 230 transitions. [2021-12-16 05:58:38,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:58:38,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 12 [2021-12-16 05:58:38,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:38,320 INFO L225 Difference]: With dead ends: 217 [2021-12-16 05:58:38,320 INFO L226 Difference]: Without dead ends: 217 [2021-12-16 05:58:38,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:58:38,324 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 121 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:38,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 754 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:58:38,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-16 05:58:38,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 196. [2021-12-16 05:58:38,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 109 states have (on average 1.7522935779816513) internal successors, (191), 180 states have internal predecessors, (191), 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) [2021-12-16 05:58:38,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 208 transitions. [2021-12-16 05:58:38,331 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 208 transitions. Word has length 12 [2021-12-16 05:58:38,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:38,331 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 208 transitions. [2021-12-16 05:58:38,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-12-16 05:58:38,331 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 208 transitions. [2021-12-16 05:58:38,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-16 05:58:38,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:38,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:38,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:38,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:38,539 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:38,539 INFO L85 PathProgramCache]: Analyzing trace with hash -95661219, now seen corresponding path program 1 times [2021-12-16 05:58:38,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:38,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442603978] [2021-12-16 05:58:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:38,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:38,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:38,541 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) [2021-12-16 05:58:38,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-16 05:58:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:38,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 05:58:38,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:38,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:38,624 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:38,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442603978] [2021-12-16 05:58:38,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442603978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:38,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:38,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:58:38,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468223047] [2021-12-16 05:58:38,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:38,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:58:38,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:38,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:58:38,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:58:38,626 INFO L87 Difference]: Start difference. First operand 196 states and 208 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-16 05:58:38,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:38,651 INFO L93 Difference]: Finished difference Result 201 states and 212 transitions. [2021-12-16 05:58:38,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:58:38,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 12 [2021-12-16 05:58:38,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:38,654 INFO L225 Difference]: With dead ends: 201 [2021-12-16 05:58:38,654 INFO L226 Difference]: Without dead ends: 201 [2021-12-16 05:58:38,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:58:38,655 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 104 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 702 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 [2021-12-16 05:58:38,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 702 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:58:38,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-16 05:58:38,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2021-12-16 05:58:38,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 111 states have (on average 1.7387387387387387) internal successors, (193), 182 states have internal predecessors, (193), 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) [2021-12-16 05:58:38,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 210 transitions. [2021-12-16 05:58:38,659 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 210 transitions. Word has length 12 [2021-12-16 05:58:38,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:38,659 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 210 transitions. [2021-12-16 05:58:38,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-16 05:58:38,660 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 210 transitions. [2021-12-16 05:58:38,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 05:58:38,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:38,660 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:38,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:38,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:38,867 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_LEAK === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:38,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:38,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1329489612, now seen corresponding path program 1 times [2021-12-16 05:58:38,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:38,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168409974] [2021-12-16 05:58:38,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:38,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:38,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:38,869 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:58:38,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-16 05:58:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:38,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 05:58:38,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:38,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:38,961 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:38,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168409974] [2021-12-16 05:58:38,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168409974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:38,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:38,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:58:38,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823439417] [2021-12-16 05:58:38,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:38,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:58:38,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:38,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:58:38,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:58:38,965 INFO L87 Difference]: Start difference. First operand 198 states and 210 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-12-16 05:58:39,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:39,295 INFO L93 Difference]: Finished difference Result 210 states and 224 transitions. [2021-12-16 05:58:39,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:58:39,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 13 [2021-12-16 05:58:39,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:39,297 INFO L225 Difference]: With dead ends: 210 [2021-12-16 05:58:39,297 INFO L226 Difference]: Without dead ends: 202 [2021-12-16 05:58:39,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:58:39,298 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 51 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:39,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 382 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 05:58:39,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-16 05:58:39,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 192. [2021-12-16 05:58:39,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 106 states have (on average 1.7641509433962264) internal successors, (187), 177 states have internal predecessors, (187), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 05:58:39,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 203 transitions. [2021-12-16 05:58:39,316 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 203 transitions. Word has length 13 [2021-12-16 05:58:39,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:39,317 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 203 transitions. [2021-12-16 05:58:39,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-12-16 05:58:39,317 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 203 transitions. [2021-12-16 05:58:39,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 05:58:39,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:39,318 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:39,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:39,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:39,526 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:39,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:39,527 INFO L85 PathProgramCache]: Analyzing trace with hash -317607953, now seen corresponding path program 1 times [2021-12-16 05:58:39,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:39,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122939054] [2021-12-16 05:58:39,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:39,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:39,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:39,529 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) [2021-12-16 05:58:39,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-16 05:58:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:39,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-16 05:58:39,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:39,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:58:39,780 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 [2021-12-16 05:58:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:39,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:39,852 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:39,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122939054] [2021-12-16 05:58:39,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122939054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:39,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:39,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:58:39,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200462358] [2021-12-16 05:58:39,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:39,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 05:58:39,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:39,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 05:58:39,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:58:39,855 INFO L87 Difference]: Start difference. First operand 192 states and 203 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 05:58:40,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:40,516 INFO L93 Difference]: Finished difference Result 202 states and 216 transitions. [2021-12-16 05:58:40,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 05:58:40,516 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-12-16 05:58:40,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:40,518 INFO L225 Difference]: With dead ends: 202 [2021-12-16 05:58:40,518 INFO L226 Difference]: Without dead ends: 202 [2021-12-16 05:58:40,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:58:40,519 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 59 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:40,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 582 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 452 Invalid, 0 Unknown, 120 Unchecked, 0.6s Time] [2021-12-16 05:58:40,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-16 05:58:40,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 191. [2021-12-16 05:58:40,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 106 states have (on average 1.7547169811320755) internal successors, (186), 176 states have internal predecessors, (186), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 05:58:40,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 202 transitions. [2021-12-16 05:58:40,524 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 202 transitions. Word has length 16 [2021-12-16 05:58:40,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:40,524 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 202 transitions. [2021-12-16 05:58:40,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 05:58:40,533 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 202 transitions. [2021-12-16 05:58:40,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 05:58:40,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:40,534 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:40,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:40,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:40,734 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:40,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:40,735 INFO L85 PathProgramCache]: Analyzing trace with hash -317607954, now seen corresponding path program 1 times [2021-12-16 05:58:40,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:40,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23416599] [2021-12-16 05:58:40,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:40,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:40,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:40,737 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) [2021-12-16 05:58:40,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-16 05:58:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:40,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 05:58:40,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:40,891 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-16 05:58:40,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-16 05:58:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:40,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:40,927 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:40,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23416599] [2021-12-16 05:58:40,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23416599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:40,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:40,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:58:40,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418115683] [2021-12-16 05:58:40,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:40,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:58:40,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:40,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:58:40,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:58:40,929 INFO L87 Difference]: Start difference. First operand 191 states and 202 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 05:58:41,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:41,333 INFO L93 Difference]: Finished difference Result 243 states and 257 transitions. [2021-12-16 05:58:41,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 05:58:41,334 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2021-12-16 05:58:41,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:41,336 INFO L225 Difference]: With dead ends: 243 [2021-12-16 05:58:41,336 INFO L226 Difference]: Without dead ends: 243 [2021-12-16 05:58:41,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:58:41,336 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 280 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:41,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 480 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 317 Invalid, 0 Unknown, 107 Unchecked, 0.4s Time] [2021-12-16 05:58:41,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-16 05:58:41,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 201. [2021-12-16 05:58:41,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 115 states have (on average 1.7391304347826086) internal successors, (200), 185 states have internal predecessors, (200), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-16 05:58:41,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 218 transitions. [2021-12-16 05:58:41,345 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 218 transitions. Word has length 16 [2021-12-16 05:58:41,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:41,346 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 218 transitions. [2021-12-16 05:58:41,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 05:58:41,346 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 218 transitions. [2021-12-16 05:58:41,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 05:58:41,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:41,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:41,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:41,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:41,554 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:41,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:41,554 INFO L85 PathProgramCache]: Analyzing trace with hash -778576348, now seen corresponding path program 1 times [2021-12-16 05:58:41,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:41,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219623449] [2021-12-16 05:58:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:41,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:41,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:41,556 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) [2021-12-16 05:58:41,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-16 05:58:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:41,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 05:58:41,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:41,687 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 [2021-12-16 05:58:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:41,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:41,732 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:41,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219623449] [2021-12-16 05:58:41,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219623449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:41,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:41,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:58:41,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599981776] [2021-12-16 05:58:41,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:41,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:58:41,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:41,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:58:41,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:58:41,733 INFO L87 Difference]: Start difference. First operand 201 states and 218 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2021-12-16 05:58:42,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:42,125 INFO L93 Difference]: Finished difference Result 250 states and 274 transitions. [2021-12-16 05:58:42,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:58:42,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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 25 [2021-12-16 05:58:42,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:42,126 INFO L225 Difference]: With dead ends: 250 [2021-12-16 05:58:42,126 INFO L226 Difference]: Without dead ends: 250 [2021-12-16 05:58:42,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:58:42,127 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 63 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:42,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 623 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 05:58:42,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-16 05:58:42,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 225. [2021-12-16 05:58:42,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 141 states have (on average 1.7588652482269505) internal successors, (248), 209 states have internal predecessors, (248), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-16 05:58:42,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 266 transitions. [2021-12-16 05:58:42,132 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 266 transitions. Word has length 25 [2021-12-16 05:58:42,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:42,133 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 266 transitions. [2021-12-16 05:58:42,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2021-12-16 05:58:42,133 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 266 transitions. [2021-12-16 05:58:42,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 05:58:42,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:42,133 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:42,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:42,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:42,340 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:42,341 INFO L85 PathProgramCache]: Analyzing trace with hash -778576347, now seen corresponding path program 1 times [2021-12-16 05:58:42,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:42,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045254465] [2021-12-16 05:58:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:42,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:42,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:42,342 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:58:42,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-16 05:58:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:42,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 05:58:42,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:42,445 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 [2021-12-16 05:58:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:42,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:42,496 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:42,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045254465] [2021-12-16 05:58:42,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045254465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:42,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:42,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:58:42,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797346657] [2021-12-16 05:58:42,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:42,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:58:42,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:42,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:58:42,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:58:42,498 INFO L87 Difference]: Start difference. First operand 225 states and 266 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2021-12-16 05:58:42,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:43,000 INFO L93 Difference]: Finished difference Result 282 states and 309 transitions. [2021-12-16 05:58:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:58:43,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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 25 [2021-12-16 05:58:43,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:43,003 INFO L225 Difference]: With dead ends: 282 [2021-12-16 05:58:43,003 INFO L226 Difference]: Without dead ends: 282 [2021-12-16 05:58:43,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:58:43,003 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 97 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:43,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 621 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 05:58:43,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-12-16 05:58:43,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 227. [2021-12-16 05:58:43,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 144 states have (on average 1.7361111111111112) internal successors, (250), 210 states have internal predecessors, (250), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-16 05:58:43,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 271 transitions. [2021-12-16 05:58:43,020 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 271 transitions. Word has length 25 [2021-12-16 05:58:43,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:43,020 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 271 transitions. [2021-12-16 05:58:43,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2021-12-16 05:58:43,020 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 271 transitions. [2021-12-16 05:58:43,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 05:58:43,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:43,021 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:43,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:43,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:43,227 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:43,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:43,228 INFO L85 PathProgramCache]: Analyzing trace with hash -887499840, now seen corresponding path program 1 times [2021-12-16 05:58:43,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:43,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993611097] [2021-12-16 05:58:43,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:43,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:43,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:43,231 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) [2021-12-16 05:58:43,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-16 05:58:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:43,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 05:58:43,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:43,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:43,360 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:43,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993611097] [2021-12-16 05:58:43,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993611097] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:43,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:43,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:58:43,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536565615] [2021-12-16 05:58:43,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:43,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:58:43,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:43,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:58:43,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:58:43,361 INFO L87 Difference]: Start difference. First operand 227 states and 271 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 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) [2021-12-16 05:58:43,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:43,421 INFO L93 Difference]: Finished difference Result 227 states and 270 transitions. [2021-12-16 05:58:43,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:58:43,422 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 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 27 [2021-12-16 05:58:43,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:43,423 INFO L225 Difference]: With dead ends: 227 [2021-12-16 05:58:43,423 INFO L226 Difference]: Without dead ends: 227 [2021-12-16 05:58:43,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:58:43,424 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 112 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:43,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 802 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:58:43,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-16 05:58:43,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2021-12-16 05:58:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 144 states have (on average 1.7291666666666667) internal successors, (249), 210 states have internal predecessors, (249), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-16 05:58:43,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 270 transitions. [2021-12-16 05:58:43,429 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 270 transitions. Word has length 27 [2021-12-16 05:58:43,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:43,429 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 270 transitions. [2021-12-16 05:58:43,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 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) [2021-12-16 05:58:43,429 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 270 transitions. [2021-12-16 05:58:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-16 05:58:43,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:43,430 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:43,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:43,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:43,631 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:43,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:43,632 INFO L85 PathProgramCache]: Analyzing trace with hash -542371696, now seen corresponding path program 1 times [2021-12-16 05:58:43,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:43,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311602589] [2021-12-16 05:58:43,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:43,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:43,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:43,633 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) [2021-12-16 05:58:43,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-16 05:58:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:43,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 05:58:43,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:43,809 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 [2021-12-16 05:58:43,877 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-16 05:58:43,877 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 [2021-12-16 05:58:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:43,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:43,934 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:43,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311602589] [2021-12-16 05:58:43,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311602589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:43,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:43,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 05:58:43,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195138967] [2021-12-16 05:58:43,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:43,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 05:58:43,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:43,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 05:58:43,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:58:43,936 INFO L87 Difference]: Start difference. First operand 227 states and 270 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 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) [2021-12-16 05:58:44,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:44,514 INFO L93 Difference]: Finished difference Result 299 states and 329 transitions. [2021-12-16 05:58:44,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:58:44,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 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 33 [2021-12-16 05:58:44,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:44,516 INFO L225 Difference]: With dead ends: 299 [2021-12-16 05:58:44,516 INFO L226 Difference]: Without dead ends: 299 [2021-12-16 05:58:44,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:58:44,517 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 205 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:44,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 644 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 360 Invalid, 0 Unknown, 267 Unchecked, 0.5s Time] [2021-12-16 05:58:44,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-12-16 05:58:44,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 224. [2021-12-16 05:58:44,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 144 states have (on average 1.6805555555555556) internal successors, (242), 207 states have internal predecessors, (242), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-16 05:58:44,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 263 transitions. [2021-12-16 05:58:44,524 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 263 transitions. Word has length 33 [2021-12-16 05:58:44,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:44,524 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 263 transitions. [2021-12-16 05:58:44,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 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) [2021-12-16 05:58:44,524 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 263 transitions. [2021-12-16 05:58:44,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-16 05:58:44,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:44,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:44,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:44,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:44,733 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:44,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:44,733 INFO L85 PathProgramCache]: Analyzing trace with hash -542371695, now seen corresponding path program 1 times [2021-12-16 05:58:44,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:44,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580373529] [2021-12-16 05:58:44,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:44,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:44,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:44,735 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:58:44,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-16 05:58:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:44,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 05:58:44,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:44,888 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 [2021-12-16 05:58:44,893 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 [2021-12-16 05:58:45,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:58:45,007 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 [2021-12-16 05:58:45,015 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:58:45,016 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 [2021-12-16 05:58:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:45,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:45,092 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:45,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580373529] [2021-12-16 05:58:45,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580373529] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:45,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:45,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:58:45,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236665450] [2021-12-16 05:58:45,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:45,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:58:45,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:45,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:58:45,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:58:45,093 INFO L87 Difference]: Start difference. First operand 224 states and 263 transitions. Second operand has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 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) [2021-12-16 05:58:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:45,609 INFO L93 Difference]: Finished difference Result 279 states and 306 transitions. [2021-12-16 05:58:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 05:58:45,609 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 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 33 [2021-12-16 05:58:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:45,611 INFO L225 Difference]: With dead ends: 279 [2021-12-16 05:58:45,611 INFO L226 Difference]: Without dead ends: 279 [2021-12-16 05:58:45,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:58:45,611 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 176 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:45,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 479 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 379 Invalid, 0 Unknown, 153 Unchecked, 0.5s Time] [2021-12-16 05:58:45,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-16 05:58:45,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 224. [2021-12-16 05:58:45,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 144 states have (on average 1.6527777777777777) internal successors, (238), 207 states have internal predecessors, (238), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-16 05:58:45,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 259 transitions. [2021-12-16 05:58:45,616 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 259 transitions. Word has length 33 [2021-12-16 05:58:45,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:45,616 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 259 transitions. [2021-12-16 05:58:45,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 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) [2021-12-16 05:58:45,616 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 259 transitions. [2021-12-16 05:58:45,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-16 05:58:45,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:45,617 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:45,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:45,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:45,821 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:45,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:45,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1528197373, now seen corresponding path program 1 times [2021-12-16 05:58:45,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:45,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770425923] [2021-12-16 05:58:45,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:45,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:45,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:45,823 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) [2021-12-16 05:58:45,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-16 05:58:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:45,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 05:58:45,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:45,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:45,976 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:45,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770425923] [2021-12-16 05:58:45,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770425923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:45,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:45,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:58:45,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861535159] [2021-12-16 05:58:45,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:45,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:58:45,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:45,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:58:45,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:58:45,978 INFO L87 Difference]: Start difference. First operand 224 states and 259 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 05:58:45,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:45,997 INFO L93 Difference]: Finished difference Result 266 states and 305 transitions. [2021-12-16 05:58:45,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:58:45,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2021-12-16 05:58:45,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:45,999 INFO L225 Difference]: With dead ends: 266 [2021-12-16 05:58:45,999 INFO L226 Difference]: Without dead ends: 266 [2021-12-16 05:58:45,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:58:45,999 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 36 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:46,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 571 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:58:46,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-16 05:58:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 228. [2021-12-16 05:58:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 148 states have (on average 1.635135135135135) internal successors, (242), 211 states have internal predecessors, (242), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-16 05:58:46,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 263 transitions. [2021-12-16 05:58:46,004 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 263 transitions. Word has length 35 [2021-12-16 05:58:46,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:46,004 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 263 transitions. [2021-12-16 05:58:46,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 05:58:46,005 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 263 transitions. [2021-12-16 05:58:46,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-16 05:58:46,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:46,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:46,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:46,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:46,207 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:46,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:46,208 INFO L85 PathProgramCache]: Analyzing trace with hash -129478379, now seen corresponding path program 1 times [2021-12-16 05:58:46,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:46,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649264064] [2021-12-16 05:58:46,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:46,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:46,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:46,210 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) [2021-12-16 05:58:46,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-16 05:58:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:46,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 05:58:46,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:46,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:46,611 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:46,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649264064] [2021-12-16 05:58:46,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649264064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:46,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:46,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:58:46,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701026019] [2021-12-16 05:58:46,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:46,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 05:58:46,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:46,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 05:58:46,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:58:46,612 INFO L87 Difference]: Start difference. First operand 228 states and 263 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 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) [2021-12-16 05:58:46,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:46,623 INFO L93 Difference]: Finished difference Result 247 states and 283 transitions. [2021-12-16 05:58:46,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 05:58:46,626 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 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 36 [2021-12-16 05:58:46,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:46,627 INFO L225 Difference]: With dead ends: 247 [2021-12-16 05:58:46,627 INFO L226 Difference]: Without dead ends: 247 [2021-12-16 05:58:46,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:58:46,628 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 37 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:46,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 858 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 66 Unchecked, 0.0s Time] [2021-12-16 05:58:46,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-12-16 05:58:46,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2021-12-16 05:58:46,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 166 states have (on average 1.5783132530120483) internal successors, (262), 229 states have internal predecessors, (262), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-16 05:58:46,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 283 transitions. [2021-12-16 05:58:46,632 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 283 transitions. Word has length 36 [2021-12-16 05:58:46,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:46,633 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 283 transitions. [2021-12-16 05:58:46,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 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) [2021-12-16 05:58:46,633 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 283 transitions. [2021-12-16 05:58:46,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-16 05:58:46,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:46,634 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:46,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:46,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:46,841 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:46,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:46,842 INFO L85 PathProgramCache]: Analyzing trace with hash 189837640, now seen corresponding path program 1 times [2021-12-16 05:58:46,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:46,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340583956] [2021-12-16 05:58:46,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:46,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:46,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:46,843 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) [2021-12-16 05:58:46,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-16 05:58:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:46,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 05:58:46,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:46,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:46,998 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:46,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340583956] [2021-12-16 05:58:46,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340583956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:46,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:46,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:58:46,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577055632] [2021-12-16 05:58:46,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:46,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:58:46,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:46,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:58:46,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:58:46,999 INFO L87 Difference]: Start difference. First operand 247 states and 283 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 05:58:47,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:47,019 INFO L93 Difference]: Finished difference Result 270 states and 308 transitions. [2021-12-16 05:58:47,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:58:47,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-12-16 05:58:47,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:47,020 INFO L225 Difference]: With dead ends: 270 [2021-12-16 05:58:47,020 INFO L226 Difference]: Without dead ends: 270 [2021-12-16 05:58:47,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:58:47,021 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 43 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:47,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 569 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:58:47,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-16 05:58:47,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 249. [2021-12-16 05:58:47,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 168 states have (on average 1.5714285714285714) internal successors, (264), 231 states have internal predecessors, (264), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-16 05:58:47,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 285 transitions. [2021-12-16 05:58:47,026 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 285 transitions. Word has length 40 [2021-12-16 05:58:47,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:47,026 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 285 transitions. [2021-12-16 05:58:47,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 05:58:47,026 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 285 transitions. [2021-12-16 05:58:47,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-16 05:58:47,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:47,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:47,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:47,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:47,234 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:47,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:47,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1958974084, now seen corresponding path program 1 times [2021-12-16 05:58:47,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:47,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941211601] [2021-12-16 05:58:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:47,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:47,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:47,236 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) [2021-12-16 05:58:47,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-16 05:58:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:47,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 05:58:47,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:47,407 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 [2021-12-16 05:58:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:47,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:47,477 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:47,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941211601] [2021-12-16 05:58:47,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941211601] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:47,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:47,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:58:47,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032604447] [2021-12-16 05:58:47,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:47,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:58:47,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:47,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:58:47,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:58:47,479 INFO L87 Difference]: Start difference. First operand 249 states and 285 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2021-12-16 05:58:48,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:48,080 INFO L93 Difference]: Finished difference Result 292 states and 321 transitions. [2021-12-16 05:58:48,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 05:58:48,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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 42 [2021-12-16 05:58:48,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:48,090 INFO L225 Difference]: With dead ends: 292 [2021-12-16 05:58:48,090 INFO L226 Difference]: Without dead ends: 292 [2021-12-16 05:58:48,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:58:48,091 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 119 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:48,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 802 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 05:58:48,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-12-16 05:58:48,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 248. [2021-12-16 05:58:48,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 168 states have (on average 1.5535714285714286) internal successors, (261), 230 states have internal predecessors, (261), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-16 05:58:48,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 282 transitions. [2021-12-16 05:58:48,096 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 282 transitions. Word has length 42 [2021-12-16 05:58:48,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:48,096 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 282 transitions. [2021-12-16 05:58:48,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2021-12-16 05:58:48,096 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 282 transitions. [2021-12-16 05:58:48,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-16 05:58:48,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:48,097 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:48,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:48,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:48,306 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:48,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:48,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1958974083, now seen corresponding path program 1 times [2021-12-16 05:58:48,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:48,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128012384] [2021-12-16 05:58:48,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:48,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:48,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:48,308 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) [2021-12-16 05:58:48,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-16 05:58:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:48,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 05:58:48,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:48,514 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 [2021-12-16 05:58:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:48,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:48,653 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:48,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128012384] [2021-12-16 05:58:48,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128012384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:48,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:48,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:58:48,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982138387] [2021-12-16 05:58:48,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:48,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:58:48,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:48,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:58:48,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:58:48,655 INFO L87 Difference]: Start difference. First operand 248 states and 282 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2021-12-16 05:58:49,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:49,355 INFO L93 Difference]: Finished difference Result 317 states and 346 transitions. [2021-12-16 05:58:49,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:58:49,362 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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 42 [2021-12-16 05:58:49,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:49,363 INFO L225 Difference]: With dead ends: 317 [2021-12-16 05:58:49,363 INFO L226 Difference]: Without dead ends: 317 [2021-12-16 05:58:49,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:58:49,364 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 142 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:49,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 833 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 05:58:49,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-12-16 05:58:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 248. [2021-12-16 05:58:49,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 168 states have (on average 1.5416666666666667) internal successors, (259), 230 states have internal predecessors, (259), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-16 05:58:49,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 280 transitions. [2021-12-16 05:58:49,369 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 280 transitions. Word has length 42 [2021-12-16 05:58:49,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:49,370 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 280 transitions. [2021-12-16 05:58:49,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2021-12-16 05:58:49,370 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 280 transitions. [2021-12-16 05:58:49,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-16 05:58:49,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:49,370 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:49,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:49,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:49,587 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:49,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:49,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2045419631, now seen corresponding path program 1 times [2021-12-16 05:58:49,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:49,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [695747163] [2021-12-16 05:58:49,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:49,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:49,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:49,589 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:58:49,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-16 05:58:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:49,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-16 05:58:49,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:49,909 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-16 05:58:49,909 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 4 case distinctions, treesize of input 26 treesize of output 43 [2021-12-16 05:58:50,235 INFO L354 Elim1Store]: treesize reduction 14, result has 64.1 percent of original size [2021-12-16 05:58:50,235 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 23 treesize of output 42 [2021-12-16 05:58:50,605 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-16 05:58:50,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 47 [2021-12-16 05:58:51,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:58:51,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:58:51,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:58:51,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 37 [2021-12-16 05:58:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:51,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:51,442 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:51,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [695747163] [2021-12-16 05:58:51,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [695747163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:51,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:51,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-16 05:58:51,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070012037] [2021-12-16 05:58:51,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:51,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 05:58:51,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:51,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 05:58:51,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-12-16 05:58:51,444 INFO L87 Difference]: Start difference. First operand 248 states and 280 transitions. Second operand has 17 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 05:58:51,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:51,778 INFO L93 Difference]: Finished difference Result 260 states and 295 transitions. [2021-12-16 05:58:51,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 05:58:51,778 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2021-12-16 05:58:51,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:51,779 INFO L225 Difference]: With dead ends: 260 [2021-12-16 05:58:51,780 INFO L226 Difference]: Without dead ends: 260 [2021-12-16 05:58:51,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-12-16 05:58:51,780 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 40 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 560 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:51,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 1115 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 228 Invalid, 0 Unknown, 560 Unchecked, 0.3s Time] [2021-12-16 05:58:51,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-16 05:58:51,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 256. [2021-12-16 05:58:51,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 176 states have (on average 1.5284090909090908) internal successors, (269), 238 states have internal predecessors, (269), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-16 05:58:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 290 transitions. [2021-12-16 05:58:51,786 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 290 transitions. Word has length 42 [2021-12-16 05:58:51,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:51,786 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 290 transitions. [2021-12-16 05:58:51,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 05:58:51,786 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 290 transitions. [2021-12-16 05:58:51,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-16 05:58:51,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:51,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:51,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:51,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:51,999 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:51,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:51,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2045419632, now seen corresponding path program 1 times [2021-12-16 05:58:51,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:52,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578882644] [2021-12-16 05:58:52,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:52,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:52,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:52,001 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) [2021-12-16 05:58:52,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-16 05:58:52,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:52,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-16 05:58:52,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:52,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:58:52,388 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 [2021-12-16 05:58:52,408 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-16 05:58:52,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-12-16 05:58:52,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:58:52,651 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 [2021-12-16 05:58:52,774 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:58:52,775 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 [2021-12-16 05:58:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:52,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:52,970 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:52,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578882644] [2021-12-16 05:58:52,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578882644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:52,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:52,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-16 05:58:52,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599000243] [2021-12-16 05:58:52,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:52,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 05:58:52,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:52,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 05:58:52,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:58:52,972 INFO L87 Difference]: Start difference. First operand 256 states and 290 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 05:58:53,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:53,836 INFO L93 Difference]: Finished difference Result 264 states and 297 transitions. [2021-12-16 05:58:53,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 05:58:53,839 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2021-12-16 05:58:53,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:53,840 INFO L225 Difference]: With dead ends: 264 [2021-12-16 05:58:53,840 INFO L226 Difference]: Without dead ends: 264 [2021-12-16 05:58:53,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-16 05:58:53,841 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 239 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:53,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 766 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 720 Invalid, 0 Unknown, 280 Unchecked, 0.7s Time] [2021-12-16 05:58:53,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-12-16 05:58:53,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 254. [2021-12-16 05:58:53,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 176 states have (on average 1.5113636363636365) internal successors, (266), 236 states have internal predecessors, (266), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-16 05:58:53,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 287 transitions. [2021-12-16 05:58:53,845 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 287 transitions. Word has length 42 [2021-12-16 05:58:53,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:53,846 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 287 transitions. [2021-12-16 05:58:53,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 05:58:53,846 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 287 transitions. [2021-12-16 05:58:53,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 05:58:53,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:53,846 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:53,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:54,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:54,054 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_LEAK === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:54,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:54,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1016480774, now seen corresponding path program 1 times [2021-12-16 05:58:54,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:54,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940596599] [2021-12-16 05:58:54,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:54,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:54,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:54,056 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:58:54,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-16 05:58:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:54,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 05:58:54,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:54,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:54,213 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:54,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940596599] [2021-12-16 05:58:54,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940596599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:54,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:54,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:58:54,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295314001] [2021-12-16 05:58:54,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:54,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:58:54,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:54,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:58:54,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:58:54,221 INFO L87 Difference]: Start difference. First operand 254 states and 287 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 05:58:54,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:54,251 INFO L93 Difference]: Finished difference Result 276 states and 308 transitions. [2021-12-16 05:58:54,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:58:54,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-12-16 05:58:54,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:54,253 INFO L225 Difference]: With dead ends: 276 [2021-12-16 05:58:54,253 INFO L226 Difference]: Without dead ends: 276 [2021-12-16 05:58:54,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:58:54,255 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 48 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:54,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 549 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:58:54,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-16 05:58:54,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 256. [2021-12-16 05:58:54,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 178 states have (on average 1.5) internal successors, (267), 238 states have internal predecessors, (267), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-16 05:58:54,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 288 transitions. [2021-12-16 05:58:54,261 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 288 transitions. Word has length 43 [2021-12-16 05:58:54,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:54,262 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 288 transitions. [2021-12-16 05:58:54,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 05:58:54,262 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 288 transitions. [2021-12-16 05:58:54,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 05:58:54,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:54,271 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:54,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:54,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:54,476 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting free_reportsErr0REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:54,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:54,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1899527314, now seen corresponding path program 1 times [2021-12-16 05:58:54,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:54,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945800395] [2021-12-16 05:58:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:54,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:54,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:54,478 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) [2021-12-16 05:58:54,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-16 05:58:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:54,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-16 05:58:54,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:54,715 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 [2021-12-16 05:58:54,887 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 [2021-12-16 05:58:54,933 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-16 05:58:54,933 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 24 treesize of output 35 [2021-12-16 05:58:54,967 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 13 treesize of output 7 [2021-12-16 05:58:55,103 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-16 05:58:55,104 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 25 treesize of output 36 [2021-12-16 05:58:55,242 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-16 05:58:55,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 37 [2021-12-16 05:58:55,456 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-16 05:58:55,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 53 [2021-12-16 05:58:55,790 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-16 05:58:55,791 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 1 case distinctions, treesize of input 20 treesize of output 31 [2021-12-16 05:58:56,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:58:56,221 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-12-16 05:58:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:58:56,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:58:56,297 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:58:56,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945800395] [2021-12-16 05:58:56,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945800395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:58:56,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:58:56,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-16 05:58:56,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642701021] [2021-12-16 05:58:56,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:58:56,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 05:58:56,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:58:56,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 05:58:56,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-12-16 05:58:56,299 INFO L87 Difference]: Start difference. First operand 256 states and 288 transitions. Second operand has 22 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 05:58:56,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:58:56,897 INFO L93 Difference]: Finished difference Result 276 states and 311 transitions. [2021-12-16 05:58:56,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 05:58:56,898 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-12-16 05:58:56,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:58:56,899 INFO L225 Difference]: With dead ends: 276 [2021-12-16 05:58:56,899 INFO L226 Difference]: Without dead ends: 276 [2021-12-16 05:58:56,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-12-16 05:58:56,900 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 78 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 05:58:56,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 987 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 403 Invalid, 0 Unknown, 170 Unchecked, 0.5s Time] [2021-12-16 05:58:56,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-16 05:58:56,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 265. [2021-12-16 05:58:56,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 185 states have (on average 1.5027027027027027) internal successors, (278), 246 states have internal predecessors, (278), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 9 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-16 05:58:56,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 302 transitions. [2021-12-16 05:58:56,907 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 302 transitions. Word has length 45 [2021-12-16 05:58:56,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:58:56,907 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 302 transitions. [2021-12-16 05:58:56,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 05:58:56,908 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 302 transitions. [2021-12-16 05:58:56,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 05:58:56,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:58:56,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:58:56,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-16 05:58:57,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:58:57,119 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting free_reportsErr1REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:58:57,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:58:57,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1899527313, now seen corresponding path program 1 times [2021-12-16 05:58:57,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:58:57,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333724080] [2021-12-16 05:58:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:58:57,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:58:57,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:58:57,121 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:58:57,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-16 05:58:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:58:57,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-16 05:58:57,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:58:57,477 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 [2021-12-16 05:58:57,568 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-16 05:58:57,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2021-12-16 05:58:57,895 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 [2021-12-16 05:58:57,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 05:58:58,010 INFO L354 Elim1Store]: treesize reduction 57, result has 44.1 percent of original size [2021-12-16 05:58:58,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 70 [2021-12-16 05:58:58,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-16 05:58:58,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 21 [2021-12-16 05:58:58,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 3 [2021-12-16 05:58:58,622 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-16 05:58:58,623 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 1 case distinctions, treesize of input 16 treesize of output 26 [2021-12-16 05:58:58,669 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-12-16 05:58:58,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 40 [2021-12-16 05:58:59,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 48 treesize of output 42 [2021-12-16 05:58:59,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 16 [2021-12-16 05:59:00,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 16 [2021-12-16 05:59:00,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 48 treesize of output 42 [2021-12-16 05:59:05,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 05:59:05,113 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 49 treesize of output 25 [2021-12-16 05:59:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:59:05,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:59:05,515 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:59:05,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333724080] [2021-12-16 05:59:05,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333724080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:59:05,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:59:05,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-16 05:59:05,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849591818] [2021-12-16 05:59:05,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:59:05,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 05:59:05,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:59:05,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 05:59:05,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=404, Unknown=1, NotChecked=0, Total=462 [2021-12-16 05:59:05,516 INFO L87 Difference]: Start difference. First operand 265 states and 302 transitions. Second operand has 22 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 05:59:05,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:59:05,945 INFO L93 Difference]: Finished difference Result 266 states and 302 transitions. [2021-12-16 05:59:05,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 05:59:05,946 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-12-16 05:59:05,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:59:05,947 INFO L225 Difference]: With dead ends: 266 [2021-12-16 05:59:05,947 INFO L226 Difference]: Without dead ends: 266 [2021-12-16 05:59:05,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=71, Invalid=480, Unknown=1, NotChecked=0, Total=552 [2021-12-16 05:59:05,947 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 6 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 795 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:59:05,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1514 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 171 Invalid, 0 Unknown, 795 Unchecked, 0.3s Time] [2021-12-16 05:59:05,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-16 05:59:05,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2021-12-16 05:59:05,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 185 states have (on average 1.4972972972972973) internal successors, (277), 246 states have internal predecessors, (277), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 9 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-16 05:59:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 301 transitions. [2021-12-16 05:59:05,953 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 301 transitions. Word has length 45 [2021-12-16 05:59:05,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:59:05,953 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 301 transitions. [2021-12-16 05:59:05,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 05:59:05,953 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 301 transitions. [2021-12-16 05:59:05,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 05:59:05,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:59:05,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:59:05,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-16 05:59:06,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:59:06,154 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:59:06,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:59:06,155 INFO L85 PathProgramCache]: Analyzing trace with hash 218805826, now seen corresponding path program 1 times [2021-12-16 05:59:06,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:59:06,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222039564] [2021-12-16 05:59:06,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:59:06,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:59:06,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:59:06,156 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) [2021-12-16 05:59:06,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-16 05:59:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:59:06,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-16 05:59:06,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:59:06,642 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-16 05:59:06,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 51 [2021-12-16 05:59:06,976 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-16 05:59:06,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 42 [2021-12-16 05:59:07,157 INFO L354 Elim1Store]: treesize reduction 84, result has 36.8 percent of original size [2021-12-16 05:59:07,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 44 treesize of output 81 [2021-12-16 05:59:07,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 05:59:07,963 INFO L354 Elim1Store]: treesize reduction 288, result has 10.8 percent of original size [2021-12-16 05:59:07,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 4 case distinctions, treesize of input 36 treesize of output 47 [2021-12-16 05:59:08,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 16 [2021-12-16 05:59:08,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 16 [2021-12-16 05:59:08,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 16 [2021-12-16 05:59:08,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 16 [2021-12-16 05:59:09,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2021-12-16 05:59:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:59:10,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:59:10,232 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:59:10,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222039564] [2021-12-16 05:59:10,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222039564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:59:10,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:59:10,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-16 05:59:10,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784622818] [2021-12-16 05:59:10,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:59:10,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 05:59:10,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:59:10,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 05:59:10,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-16 05:59:10,233 INFO L87 Difference]: Start difference. First operand 265 states and 301 transitions. Second operand has 19 states, 16 states have (on average 2.4375) internal successors, (39), 17 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 05:59:10,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:59:10,585 INFO L93 Difference]: Finished difference Result 276 states and 314 transitions. [2021-12-16 05:59:10,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 05:59:10,585 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.4375) internal successors, (39), 17 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-12-16 05:59:10,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:59:10,586 INFO L225 Difference]: With dead ends: 276 [2021-12-16 05:59:10,586 INFO L226 Difference]: Without dead ends: 276 [2021-12-16 05:59:10,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-12-16 05:59:10,587 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 68 mSDsluCounter, 1325 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1032 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:59:10,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 1466 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 210 Invalid, 0 Unknown, 1032 Unchecked, 0.3s Time] [2021-12-16 05:59:10,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-16 05:59:10,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 269. [2021-12-16 05:59:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 189 states have (on average 1.492063492063492) internal successors, (282), 250 states have internal predecessors, (282), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 9 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-16 05:59:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 306 transitions. [2021-12-16 05:59:10,592 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 306 transitions. Word has length 45 [2021-12-16 05:59:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:59:10,593 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 306 transitions. [2021-12-16 05:59:10,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.4375) internal successors, (39), 17 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 05:59:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 306 transitions. [2021-12-16 05:59:10,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 05:59:10,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:59:10,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:59:10,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-16 05:59:10,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:59:10,803 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:59:10,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:59:10,804 INFO L85 PathProgramCache]: Analyzing trace with hash 218805827, now seen corresponding path program 1 times [2021-12-16 05:59:10,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:59:10,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888726828] [2021-12-16 05:59:10,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:59:10,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:59:10,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:59:10,805 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:59:10,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-16 05:59:11,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:59:11,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-16 05:59:11,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:59:11,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:11,317 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 [2021-12-16 05:59:11,332 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-16 05:59:11,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-12-16 05:59:11,608 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:59:11,609 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 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-16 05:59:11,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:59:11,773 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:59:11,773 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 [2021-12-16 05:59:11,811 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:59:11,811 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 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 05:59:12,005 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 [2021-12-16 05:59:12,012 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 [2021-12-16 05:59:12,334 INFO L354 Elim1Store]: treesize reduction 288, result has 10.8 percent of original size [2021-12-16 05:59:12,334 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 4 case distinctions, treesize of input 36 treesize of output 47 [2021-12-16 05:59:12,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:12,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:12,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:12,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:12,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:12,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:12,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:12,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:12,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:12,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:12,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2021-12-16 05:59:12,643 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 14 treesize of output 16 [2021-12-16 05:59:12,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-12-16 05:59:12,717 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 14 treesize of output 16 [2021-12-16 05:59:12,723 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 14 treesize of output 16 [2021-12-16 05:59:12,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-12-16 05:59:12,906 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 14 treesize of output 16 [2021-12-16 05:59:13,056 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 14 treesize of output 16 [2021-12-16 05:59:13,062 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 14 treesize of output 16 [2021-12-16 05:59:13,279 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 [2021-12-16 05:59:13,289 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 [2021-12-16 05:59:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:59:13,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:59:13,380 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:59:13,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888726828] [2021-12-16 05:59:13,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888726828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:59:13,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:59:13,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-16 05:59:13,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897126060] [2021-12-16 05:59:13,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:59:13,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 05:59:13,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:59:13,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 05:59:13,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-12-16 05:59:13,382 INFO L87 Difference]: Start difference. First operand 269 states and 306 transitions. Second operand has 19 states, 16 states have (on average 2.4375) internal successors, (39), 17 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 05:59:15,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:59:15,076 INFO L93 Difference]: Finished difference Result 408 states and 468 transitions. [2021-12-16 05:59:15,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 05:59:15,076 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.4375) internal successors, (39), 17 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-12-16 05:59:15,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:59:15,077 INFO L225 Difference]: With dead ends: 408 [2021-12-16 05:59:15,078 INFO L226 Difference]: Without dead ends: 408 [2021-12-16 05:59:15,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-12-16 05:59:15,078 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 261 mSDsluCounter, 1511 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 737 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-16 05:59:15,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 1654 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1039 Invalid, 0 Unknown, 737 Unchecked, 1.4s Time] [2021-12-16 05:59:15,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-12-16 05:59:15,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 269. [2021-12-16 05:59:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 189 states have (on average 1.4867724867724867) internal successors, (281), 250 states have internal predecessors, (281), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 9 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-16 05:59:15,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 305 transitions. [2021-12-16 05:59:15,087 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 305 transitions. Word has length 45 [2021-12-16 05:59:15,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:59:15,088 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 305 transitions. [2021-12-16 05:59:15,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.4375) internal successors, (39), 17 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 05:59:15,088 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 305 transitions. [2021-12-16 05:59:15,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-16 05:59:15,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:59:15,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:59:15,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-16 05:59:15,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:59:15,299 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting free_reportsErr2REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:59:15,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:59:15,300 INFO L85 PathProgramCache]: Analyzing trace with hash -84648785, now seen corresponding path program 1 times [2021-12-16 05:59:15,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:59:15,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516006658] [2021-12-16 05:59:15,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:59:15,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:59:15,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:59:15,301 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) [2021-12-16 05:59:15,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-16 05:59:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:59:15,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-16 05:59:15,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:59:15,680 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-16 05:59:15,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 41 [2021-12-16 05:59:15,921 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 [2021-12-16 05:59:15,985 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-16 05:59:15,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-16 05:59:16,218 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 [2021-12-16 05:59:16,229 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 19 treesize of output 18 [2021-12-16 05:59:16,315 INFO L354 Elim1Store]: treesize reduction 38, result has 55.8 percent of original size [2021-12-16 05:59:16,315 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 4 case distinctions, treesize of input 40 treesize of output 76 [2021-12-16 05:59:16,433 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 [2021-12-16 05:59:16,582 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-16 05:59:16,582 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 27 treesize of output 29 [2021-12-16 05:59:16,694 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 14 treesize of output 16 [2021-12-16 05:59:16,709 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-16 05:59:16,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 40 [2021-12-16 05:59:16,785 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-16 05:59:16,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 40 [2021-12-16 05:59:16,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-16 05:59:17,008 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 [2021-12-16 05:59:17,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:59:17,139 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 1 case distinctions, treesize of input 46 treesize of output 21 [2021-12-16 05:59:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:59:17,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:59:17,210 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:59:17,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516006658] [2021-12-16 05:59:17,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516006658] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:59:17,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:59:17,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-12-16 05:59:17,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886973452] [2021-12-16 05:59:17,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:59:17,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-16 05:59:17,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:59:17,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-16 05:59:17,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-12-16 05:59:17,212 INFO L87 Difference]: Start difference. First operand 269 states and 305 transitions. Second operand has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 05:59:19,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:59:19,875 INFO L93 Difference]: Finished difference Result 307 states and 340 transitions. [2021-12-16 05:59:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-16 05:59:19,882 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2021-12-16 05:59:19,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:59:19,883 INFO L225 Difference]: With dead ends: 307 [2021-12-16 05:59:19,883 INFO L226 Difference]: Without dead ends: 307 [2021-12-16 05:59:19,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-12-16 05:59:19,884 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 131 mSDsluCounter, 2191 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 387 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-16 05:59:19,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 2339 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1410 Invalid, 0 Unknown, 387 Unchecked, 1.8s Time] [2021-12-16 05:59:19,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-12-16 05:59:19,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 282. [2021-12-16 05:59:19,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 200 states have (on average 1.505) internal successors, (301), 261 states have internal predecessors, (301), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-16 05:59:19,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 327 transitions. [2021-12-16 05:59:19,890 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 327 transitions. Word has length 47 [2021-12-16 05:59:19,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:59:19,890 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 327 transitions. [2021-12-16 05:59:19,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 05:59:19,890 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 327 transitions. [2021-12-16 05:59:19,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-16 05:59:19,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:59:19,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:59:19,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-12-16 05:59:20,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:59:20,099 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting free_reportsErr3REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:59:20,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:59:20,100 INFO L85 PathProgramCache]: Analyzing trace with hash -84648784, now seen corresponding path program 1 times [2021-12-16 05:59:20,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:59:20,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824697619] [2021-12-16 05:59:20,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:59:20,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:59:20,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:59:20,101 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:59:20,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-16 05:59:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:59:20,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-16 05:59:20,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:59:20,458 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-16 05:59:20,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-16 05:59:20,631 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 [2021-12-16 05:59:20,638 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 [2021-12-16 05:59:20,693 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-16 05:59:20,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-16 05:59:20,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:20,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-16 05:59:20,882 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 19 treesize of output 18 [2021-12-16 05:59:20,885 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 23 treesize of output 22 [2021-12-16 05:59:20,954 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-12-16 05:59:20,954 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 26 treesize of output 37 [2021-12-16 05:59:21,004 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 20 treesize of output 12 [2021-12-16 05:59:21,181 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-16 05:59:21,181 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 25 treesize of output 27 [2021-12-16 05:59:21,322 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-16 05:59:21,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 49 [2021-12-16 05:59:21,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2021-12-16 05:59:21,451 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-16 05:59:21,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 49 [2021-12-16 05:59:21,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2021-12-16 05:59:21,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:21,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:59:21,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:59:21,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 48 [2021-12-16 05:59:21,844 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-16 05:59:21,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 25 [2021-12-16 05:59:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:59:21,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:59:21,928 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:59:21,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824697619] [2021-12-16 05:59:21,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824697619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:59:21,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:59:21,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-12-16 05:59:21,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006305410] [2021-12-16 05:59:21,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:59:21,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 05:59:21,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:59:21,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 05:59:21,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-12-16 05:59:21,930 INFO L87 Difference]: Start difference. First operand 282 states and 327 transitions. Second operand has 26 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 05:59:24,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:59:24,684 INFO L93 Difference]: Finished difference Result 354 states and 379 transitions. [2021-12-16 05:59:24,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-16 05:59:24,684 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2021-12-16 05:59:24,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:59:24,685 INFO L225 Difference]: With dead ends: 354 [2021-12-16 05:59:24,686 INFO L226 Difference]: Without dead ends: 354 [2021-12-16 05:59:24,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2021-12-16 05:59:24,686 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 207 mSDsluCounter, 1797 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 336 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-16 05:59:24,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 1939 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1349 Invalid, 0 Unknown, 336 Unchecked, 1.9s Time] [2021-12-16 05:59:24,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-12-16 05:59:24,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 288. [2021-12-16 05:59:24,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 205 states have (on average 1.502439024390244) internal successors, (308), 266 states have internal predecessors, (308), 11 states have call successors, (11), 11 states have call predecessors, (11), 12 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-16 05:59:24,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 333 transitions. [2021-12-16 05:59:24,691 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 333 transitions. Word has length 47 [2021-12-16 05:59:24,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:59:24,691 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 333 transitions. [2021-12-16 05:59:24,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 05:59:24,692 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 333 transitions. [2021-12-16 05:59:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-16 05:59:24,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:59:24,692 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:59:24,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-16 05:59:24,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:59:24,899 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:59:24,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:59:24,900 INFO L85 PathProgramCache]: Analyzing trace with hash -180994493, now seen corresponding path program 1 times [2021-12-16 05:59:24,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:59:24,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151276012] [2021-12-16 05:59:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:59:24,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:59:24,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:59:24,902 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) [2021-12-16 05:59:24,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-16 05:59:25,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:59:25,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-16 05:59:25,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:59:25,677 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-16 05:59:25,677 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 2 case distinctions, treesize of input 24 treesize of output 34 [2021-12-16 05:59:25,897 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 [2021-12-16 05:59:25,967 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-12-16 05:59:25,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 46 [2021-12-16 05:59:26,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:26,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:26,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:26,062 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-16 05:59:26,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 33 [2021-12-16 05:59:26,343 INFO L354 Elim1Store]: treesize reduction 100, result has 36.3 percent of original size [2021-12-16 05:59:26,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 48 treesize of output 89 [2021-12-16 05:59:26,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 05:59:26,760 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-16 05:59:26,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2021-12-16 05:59:27,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:27,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:27,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:27,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:27,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:27,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:27,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:27,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:27,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:27,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:27,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2021-12-16 05:59:27,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:27,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:27,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:27,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:27,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:27,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:27,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:27,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:27,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:27,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:27,561 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-16 05:59:27,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 61 [2021-12-16 05:59:28,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-16 05:59:28,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:28,425 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-16 05:59:28,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-12-16 05:59:28,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:28,694 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-16 05:59:28,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-12-16 05:59:28,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-16 05:59:29,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:29,068 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-16 05:59:29,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-12-16 05:59:29,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-16 05:59:29,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 16 [2021-12-16 05:59:29,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:59:29,483 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-16 05:59:29,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-12-16 05:59:30,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2021-12-16 05:59:33,079 INFO L354 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2021-12-16 05:59:33,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-12-16 05:59:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:59:34,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:59:34,658 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:59:34,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151276012] [2021-12-16 05:59:34,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [151276012] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:59:34,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:59:34,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-16 05:59:34,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229202720] [2021-12-16 05:59:34,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:59:34,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 05:59:34,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:59:34,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 05:59:34,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-12-16 05:59:34,659 INFO L87 Difference]: Start difference. First operand 288 states and 333 transitions. Second operand has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 05:59:35,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:59:35,351 INFO L93 Difference]: Finished difference Result 297 states and 344 transitions. [2021-12-16 05:59:35,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-16 05:59:35,352 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2021-12-16 05:59:35,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:59:35,353 INFO L225 Difference]: With dead ends: 297 [2021-12-16 05:59:35,353 INFO L226 Difference]: Without dead ends: 297 [2021-12-16 05:59:35,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2021-12-16 05:59:35,354 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 69 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 1581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1262 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 05:59:35,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 1605 Invalid, 1581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 307 Invalid, 0 Unknown, 1262 Unchecked, 0.4s Time] [2021-12-16 05:59:35,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-16 05:59:35,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 290. [2021-12-16 05:59:35,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 207 states have (on average 1.502415458937198) internal successors, (311), 268 states have internal predecessors, (311), 11 states have call successors, (11), 11 states have call predecessors, (11), 12 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-16 05:59:35,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 336 transitions. [2021-12-16 05:59:35,360 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 336 transitions. Word has length 47 [2021-12-16 05:59:35,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:59:35,360 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 336 transitions. [2021-12-16 05:59:35,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 05:59:35,361 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 336 transitions. [2021-12-16 05:59:35,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-16 05:59:35,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:59:35,361 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:59:35,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-12-16 05:59:35,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:59:35,577 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-16 05:59:35,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:59:35,577 INFO L85 PathProgramCache]: Analyzing trace with hash -180994492, now seen corresponding path program 1 times [2021-12-16 05:59:35,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:59:35,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339206302] [2021-12-16 05:59:35,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:59:35,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:59:35,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:59:35,579 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:59:35,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-16 05:59:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:59:36,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-16 05:59:36,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:59:36,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:59:36,655 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-16 05:59:36,656 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 4 case distinctions, treesize of input 26 treesize of output 43